Lotus Engineering – Page 2 – Chapman Report Online

January 14, 2010

New executive at Lotus Cars

Press release from Lotus:

A new decade begins with considerable changes at Group Lotus and CEO Dany Bahar is strengthening his executive team in order to take the Lotus brand to the next phase of its evolution and realise his ambitious plans for 2010 and beyond.

Lotus is pleased to announce Paul Newsome’s appointment to Director of Product Engineering for Lotus Cars. Currently Managing Director of Lotus Engineering, Paul becomes Director of Product Engineering, responsible for the engineering behind all future Lotus cars and for ensuring that they drive and perform in the way that only a Lotus can.

On taking up the challenge of Director of Product Engineering, Paul Newsome said, “Lotus has, through its launch of the all new multi-award winning Lotus Evora, again demonstrated the capability of its engineering. I look forward to building on this tremendous success with the team and delivering the exciting next generation of products we have planned. These will continue to demonstrate Lotus’ world leading attributes of performance and dynamics through light weight and take the Lotus brand into more segments of the sports car market.”

Dany Bahar commented, “This year will see some very exciting developments to the Lotus product line-up and I have set the Lotus workforce quite a challenge! The success of the changes that I and my executive team look to make relies upon their support and I thank them for their dedication and commitment in joining us on this journey.

“The executive team I am building around me represent some of the industry’s most innovative and passionate professionals and I look forward to working with Paul and the rest of the team to make Lotus the brand it has the potential to be.”

January 14, 2010

New appointment and contracts at Lotus Engineering

Press release from Lotus Engineering

Lotus Engineering starts the New Year strongly, announcing significant new contracts and welcoming a new Director of Lotus Engineering.

Major new projects with three Chinese clients ensure an excellent start to 2010 for Lotus Engineering, the automotive consultancy and technology division of Lotus Cars Limited. These projects result in a fourth consecutive year of growth in new orders for Lotus Engineering’s global third party consultancy work, with a quarter of the financial year still to go.

To continue to build on the success of both the Lotus Engineering and Lotus Cars divisions, Lotus has also made changes to the senior management structure. Dr Robert Hentschel joins Lotus as Director of Lotus Engineering. Dr Hentschel’s task will be to lead the expansion of Lotus Engineering’s third party consultancy work and to further develop its position of technology leadership in lightweight architectures, driving dynamics, efficient performance and electrical/electronics. Dr Hentschel will have full responsibility for Lotus Engineering worldwide, reporting to Dany Bahar, CEO of Group Lotus plc. Dr Hentschel brings a wealth of experience from the automotive industry and engineering services sector, most recently from positions at EDAG as Chief Operating Officer for North American operations and previously as Head of the Electrical/Electronics Business Unit.

Paul Newsome, previously Managing Director of Lotus Engineering, takes up a new role as Director of Product Engineering for Lotus Cars to develop an exciting range of new Lotus cars.

Dr Hentschel commented: “This is a fantastic opportunity for me to contribute to the continued success of this outstanding business which boasts talented engineers and an iconic brand. Lotus Engineering has an exceptional heritage with an exciting array of future products, technologies and services that will further enhance its position as a pioneer in the new automotive era. Our key areas of expertise allow us to deliver exciting vehicles and sustainable transport solutions that are exactly aligned to the needs of the global automotive industry.”

December 10, 2009

Lotus Omnivore Engine – 10% Better Fuel Economy than Current Leading Gasoline Engines

Press release from Lotus

Initial phase of Omnivore development achieves 10% improvement in fuel consumption compared to stratified direct injection engines, also with ultra low emissions. The research signals a potential paradigm shift with engine ‘upsizing’ for increased fuel economy.

The first testing phase of Lotus Engineering’s Omnivore variable compression ratio, flex-fuel direct injection two-stroke engine has been successfully completed on gasoline. In addition to exceptional fuel consumption results, the engine has successfully demonstrated homogenous charge compression ignition (HCCI) – where the engine operates without the need for the spark plug to ignite the fuel and air mixture in the cylinder – down to extremely light loads. Traditionally, this has been challenging but this combustion process results in ultra low emissions and has been achieved over a wide range of engine operating conditions, even from cold start.

The detailed research has so far focused on lower speed and load conditions that represent a major proportion of an engine’s operation in a real world environment. At 2000rpm and up to approximately 2.7 bar IMEP (Indicated Mean Effective Pressure), the ISFC (Indicated Specific Fuel Consumption) achieved is approximately 10% better than current spray-guided direct injection, spark ignition engines. Emissions results are an impressive 20 ppm NOx at less than 2.3 bar load and has four-stroke-equivalent hydrocarbons and carbon monoxide emissions.

Simon Wood, Technical Director of Lotus Engineering said: “These impressive results represent an important step-forward in Lotus Engineering’s strategy of developing an array of more efficient multi-fuel combustion systems. Omnivore lays the foundations for a novel and pragmatic vision of a variable compression ratio engine concept suitable for production. A multi-cylinder version is practical for a wide variety of vehicles and offers greatest benefit to C and D class passenger cars which can take advantage of the low cost architecture and significantly improved fuel economy and emissions. We are continuing our discussions with other manufacturers and eagerly anticipate the development of multi-cylinder demonstrations of this revolutionary engine configuration.”

The Omnivore engine concept achieves wide-range HCCI combustion and low CO2 emissions through the application of a simple wide-range variable compression ratio mechanism, itself facilitated by the adoption of the two-stroke operating cycle. Technologies combined in this package are all synergistic and provide a route to the efficient use of alternative fuels, accelerating the displacement of fossil fuels.

Jamie Turner, Chief Engineer of Powertrain Research at Lotus Engineering said: “The automotive industry, including Lotus Engineering, has quite rightly advocated engine downsizing for four-stroke engines. This is as a result of the dominance of the four-stroke cycle in the automotive world and its generation of throttling losses at part-load, where vehicles run most of the time. The two-stroke cycle, conversely, does not suffer from significant throttling losses and in many ways is a more natural fit for automotive use. With the thermodynamic disadvantages of throttling losses removed, the two-stroke engine is free to be sized according to its improved part-load fuel consumption. Downsizing therefore isn’t vital and, due to the improved light-load efficiency and emissions performance we see with Omnivore, this technology approach and ‘upsizing’ could permit a more efficient engine.”

The initial Omnivore programme has been in collaboration with Queen’s University Belfast and Orbital Corporation Limited Australia, with sponsorship from DEFRA/DECC and DOE NI through the Renewables Materials LINK programme. Future work by Lotus Engineering will concentrate on further investigating the operation on gasoline and alternative renewable fuels such as ethanol and methanol, with more in-depth analysis of specific test points.

Technical Detail

Omnivore Summary
The Omnivore engine concept features an innovative variable compression ratio system and uses a two-stroke operating cycle with direct fuel injection. It is ideally suited to flex-fuel operation with a higher degree of optimisation than is possible with existing four-stroke engines.

The engine concept features a monoblock construction that blends the cylinder head and block together eliminating the need for a cylinder head gasket, improving durability and reducing weight. In this case, the application of a monoblock is facilitated by the absence of the requirement for poppet valves. A novel charge trapping valve in the exhaust port allows asymmetric timing of exhaust flow and continuous variation of the exhaust opening timing.

The Omnivore engine uses the Orbital FlexDI fuel injection system which produces fine in-cylinder fuel preparation irrespective of fuel type and, together with air pre-mixing, allows efficient two-stroke combustion and low-temperature starting, whilst offering singular opportunity for advanced HCCI control.

The variable compression ratio is achieved by the use of a puck at the top of the combustion chamber. This simple, yet effective system moves up and down effecting the change in geometric compression depending on the load demands on the engine.

Engine Concept Features

Monoblock
The monoblock incorporates the cylinder head, the cylinder barrel and the inlet ports, together with mounts for the variable compression ratio system and the charge trapping valve housing. It also contains the non-moving location of one of the two possible injector mounting positions provided for research purposes. The other injector position is in the variable compression ratio puck. The monoblock is mounted on the upper crankcase, which is a common component with all of Lotus’ single-cylinder research engines. The engine carries a full primary and secondary balancer system. The monoblock is water-cooled by an electric water pump.

Computational fluid dynamics is used extensively to ensure effective cooling of the monoblock, a feature assisted by the removal of the cylinder head gasket, inherent in such architecture. The chief advantage of a monoblock construction in any engine, aside from the bill of materials and assembly benefits, is the reduction of bore distortion afforded by the removal of cylinder head bolts. This is especially important in piston-ported 2-stroke engines.

Variable Compression Ratio Mechanism
The primary component of the variable compression ratio mechanism is what is termed the ‘puck’, or a moveable junk piston in the cylinder head. In the case of the research engine, this puck is driven in and out by a double-eccentric mechanism itself comprising proprietary parts. The puck itself does not move at engine speed. In addition to the spark plug, the puck carries one of two possible injector positions. It is water-cooled and carries simple piston (or ‘junk’) rings for primary sealing, and an ‘O’-ring towards the top for final sealing.

The variable compression ratio system is controlled by an electric motor and worm drive arrangement at the front of the engine. Because there are no poppet valves in the engine, it is clear that the puck could be of a large diameter and since there is no need for valve cut-outs in the piston crown, the minimum volume of the combustion chamber can be much smaller than has been the case in variable compression ratio engines shown to date. When the puck is in its innermost position, its surface is essentially coincident with that of the combustion chamber squish band and this yields the highest compression ratio of 40:1.

The combustion chamber geometry necessarily alters as the puck is moved to vary the compression ratio. The chamber geometry in Omnivore was therefore chosen on the basis of 2-stroke experience in spark ignition operation. Consequently, the puck is positioned in the cylinder head in such a way that the non-moving squish band directs cooling flow towards the spark plug. The puck is water-cooled from the main engine cooling circuit.

Charge Trapping Valve
The charge trapping valve is caused to oscillate by a short articulated connecting link from an engine-speed eccentric shaft itself rotated by a belt drive from the crankshaft. A simple charge trapping valve mechanism provides for asymmetric exhaust timing and hence a modification of the original piston-ported two-stroke operating cycle. Fitting an articulated link between the eccentric shaft and the trapping valve actuating arm affords the opportunity independently to vary the opening and/or closing point. In this ‘variable’ form, at light load, the charge trapping valve can be made to control exhaust port opening, to maximize expansion in the cylinder, and the blowdown period can be optimised. The position of the control arm is controlled by the engine management system. All charge trapping valve components and their configuration have been analysed kinematically, and since they operate with modified simple harmonic motion, they do not suffer from jerk stresses.

Other Components
The cranktrain of the engine comprises an 86 mm stroke crankshaft, a trunk piston of 86 mm bore and a connecting rod with 195.5 mm between centres. The piston carries four piston rings: two pegged half-keystone compression rings which traverse the ports in the upper section, and a Napier scraper ring and U-Flex oil control ring in separate grooves in the lower portion. These are not pegged since they do not have to traverse the ports. In this manner, the working chamber is completely sealed from the crankcase and hence wet-sump lubrication can be employed.

Since this is a research engine, it is cooled by an electric water pump with a separate electrically-driven oil pump used for lubrication. Scavenge air is provided externally. For convenience, air for the Orbital air-assist DI system is provided from the factory air supply regulated to 6.5 bar maximum air delivery pressure. Note that in any multi-cylinder application it is envisaged that all these subsystems would be incorporated into the engine in the normal manner.

October 7, 2009

Lotus Triumphs at Engineering Awards

Lotus Engineering, the world-renowned automotive consultancy division of Lotus, has been victorious in the recent British Engineering Excellence Awards, winning the Judges’ Special Award, while also being named Highly Commended in the Consultancy of the Year category.

Mark James, Head of UK Operations at Lotus Engineering, collecting the Judges’ Special Award

The British Engineering Excellence Awards recognise the design engineering excellence of industry and show the world the depth of variety of engineering design innovation throughout the UK. The Judges’ Special Award was presented to acknowledge a company that epitomised the aim of the British Engineering Excellence Awards by being recognised globally as a world leader in its chosen field of engineering.

Paul Newsome, Managing Director of Lotus Engineering said: “We are delighted by this recognition from the British Engineering Excellence Awards, a testament to the hard work of our talented, visionary work force. Lotus Engineering is revered for innovation, outstanding driving dynamics, exciting niche vehicles and efficient performance engineering and continues to offer a unique blend of technical expertise and proven ability to create successful products that stand out in the market place. Lotus Engineering has seen a 23% sales increase over the last financial year, an incredible achievement in what is a challenging market, firmly reinforcing our position as one of the world’s leading automotive consultancies.”

The judges looked at recent projects that had been undertaken and assessed how Lotus Engineering has been able to diversify its knowledge base and to deliver world class engineering solutions. They were impressed that the company had continued to thrive despite the economic problems experienced by the sector in the last 18 months.

In summing up Lotus Engineering’s achievements, the panel of Judges said: “Most of its business is derived from engineering services and it is even more impressive when you think about the size of some of the companies that have gone to Lotus for its help. Lotus is a truly excellent organisation and an obvious flag bearer for all that is good in UK engineering.”

September 7, 2009

Lotus Range Extender Engine Revealed

The Lotus Range Extender – designed specifically for the new breed of highly efficient series hybrid vehicles.

Lotus Engineering, the world-renowned automotive consultancy division of Lotus, unveils its Range Extender engine at the 63rd Frankfurt International Motor Show. In a series hybrid vehicle, the Range Extender engine is attached to an electricity generator and provides a highly efficient source of energy to power the electric motor directly or charge the vehicles battery. The battery can also power the electric motor which enables the design of a drivetrain that has low emissions, optimised performance and acceptable range.

The Lotus Range Extender engine features an innovative architecture comprising an aluminium monoblock construction, integrating the cylinder block, cylinder head and exhaust manifold in one casting. This results in reduced engine mass, assembly costs, package size and improved emissions and engine durability.

The three-cylinder 1.2 litre Range Extender engine is optimised between two power generation points, giving 15 kW of electrical power at 1,500 rpm and 35 kW at 3,500 rpm via the integrated electrical generator. Its low mass of 56 kg makes it ideal for the series hybrid drivetrain configurations for which it is designed. The engine uses an optimised two-valve port-fuel injection combustion system to reduce cost and mass and, in line with Lotus Engineering’s extensive research into renewable fuels, can be operated on alcohol-based fuels or gasoline.

For successful market uptake of series hybrid vehicles with acceptable driving range, vehicle manufacturers must overcome the challenges of high vehicle cost. The Lotus Range Extender engine not only offers the advantage of a cost effective design, but also its high efficiency and low mass will enable the downsizing of expensive batteries whilst maintaining vehicle efficiency and range. The engine has been designed using production methodologies and the parts procured from low volume potential production suppliers, offering a fast route to market for original equipment manufacturers wanting to source a dedicated range extender for series hybrid vehicles.

Paul Newsome, Managing Director of Lotus Engineering said: “As the world changes, Lotus Engineering continues to change with it, continuously developing solutions for more sustainable transportation. The Lotus Range Extender engine is another example of Lotus Engineering developing new technologies for efficient performance, this time in the area of series hybrid vehicles. The engine concept we have created with its optimised combustion and compact, low mass, low cost construction is a clear demonstration of the expertise and progressive approach Lotus takes for its own research and for its clients.”

The Lotus Range Extender engine has been developed as part of the ‘Limo-Green’ project funded by the UK’s Technology Strategy Board, a collaboration between Lotus Engineering, Jaguar Cars Ltd, MIRA Ltd and Caparo Vehicle Technologies, demonstrating a large, lightweight, prestigious executive saloon with less than 120 g/km CO2 emissions.

Simon Wood, Technical Director of Lotus Engineering said: “Most series hybrid vehicles that are currently being developed will use adaptations of existing, conventional engines which are therefore compromised in the efficiency that they can achieve, designed as they are for a wide range of operating conditions. Designing the Lotus Range Extender purely for use in series hybrids has allowed us instead to develop an optimised engine that has high thermal efficiency, low fuel consumption, multi-fuel capability and a 35 kW peak output from a 1.2 litre, low cost architecture over the precise operating range required by a series hybrid drivetrain.”

Technical details:

Technical specification of the Lotus Range Extender engine

General	1.2 litre 3-cylinder with 2 valves per cylinder, SOHC Belt driven
Construction	Monoblock with Integrated Exhaust Manifold All aluminium Balance shaft (optional) Direct-coupled generator
Bore and Stroke	75.0 mm x 90.0 mm
Compression ratio	10:1
Maximum power	35 kW (47 bhp) at 3500 rpm via integrated electrical generator
Peak torque	107 Nm at 2500 rpm
Maximum BMEP	11.2 bar
Maximum Engine Speed	3500 rpm
Fuel System	Port fuel injection, Lotus EMS
Fuel	95 RON ULG / ethanol / methanol
Dry weight	56 kg

Key features of the Range Extender engine in detail:

Monoblock

The Range Extender features a novel engine architecture incorporating a monoblock construction that blends the cylinder head and block together eliminating the need for a cylinder head gasket, improving durability and reducing weight. Approximately 17 parts are eliminated using this approach and the water jacket is better optimised.

Integrated Exhaust Manifold

Lotus Engineering designed and developed a new advanced cylinder head design featuring an integrated exhaust manifold. The production-ready technology can significantly reduce manufacturing costs, emissions and weight. An integrated exhaust manifold has potential to:

o Reduce parts count: 18 fewer components resulting in lower inventory, production, logistics and aftermarket costs

o Weight reduction: total system mass reduction resulting from elimination of separate exhaust manifold

Improved engine durability

Generator

Attached to the engine via the crankshaft, the generator sustains vehicle operation beyond the range provided by the batteries.

Additional Benefits

The Lotus Range Extender engine generates a reduction in emissions through faster light-off of the close-coupled catalytic converter with a reduction in heat loss between the exhaust port and catalyst inlet. Engine operating range is optimised to deliver more efficient running, which also aids underhood thermal management.

Utilisation of the monoblock construction results in an assembly cost reduction, while there is also a reduced catalyst loading requirement because less heat is lost on engine start-up between the exhaust port and catalyst inlet.

Increased vehicle integration flexibility is achieved because of the reduction in mass and the reduced package size leads to reduced space requirements. Particular emphasis has also been placed on the coupling of the generator and NVH signature.

July 23, 2009

Tony Shute on the Evora Development cycle

TheManufacuturer.com has a fantastic video of a Tony Shute presentation on the design decisions and the development process that went into the creation of the Lotus Evora. It a bit tech heavy and quite long (38 min) but is definitely worth the watch and I guarantee that it will absolutely delight the engineer inside you.

Some of the highlights:

Went from a clean sheet to final production in 27 months
The aluminum wishbones on both sides of the front and the rear uppers use the same tooling
Headlight tooling was developed in China but uses UK parts
Radiator acts as a front wing and generates downforces
Main chassis consists of 20 extrusions
Prototypes were built on the manufacturing line

Click here to watch the video

[TheManufacturer via LotusEnthusiast]

April 16, 2009

Lotus and Harman International Announce Collaboration

Press release from Lotus

Lotus Engineering reaches agreement with Harman International to be granted exclusive rights for Active Noise Control technologies

Lotus Engineering, the world-renowned automotive consultancy division of Lotus Cars Ltd and Harman Becker Automotive Systems, the automotive division of Harman International, have reached an agreement to jointly develop noise management solutions using Lotus’ patented Active Noise Control technologies. Exclusive rights are granted to Harman Becker to manufacture the latest technology solutions for the worldwide vehicle OEM market. The agreement includes all of Lotus’ Active Noise Control technologies comprising Road Noise Cancellation, Engine Order Cancellation, and Electronic Sound Synthesis.

The Road Noise Cancellation and Engine Order Cancellation systems will provide vehicle manufacturers with the ability to greatly improve in-cabin refinement, with additional design opportunities for optimising vehicle weight reduction and fuel economy.

Road Noise Cancellation and Engine Order Cancellation reduce both overall noise levels and specific audible frequencies which may be unpleasant in the cabin space. Electronic systems determine the signal needed to provide cancellation which is then seamlessly generated through the in-car entertainment system. The result is a quiet, controlled environment free of intrusive noises.

External Electronic Sound Synthesis provides specified electronic sound models which can be applied to an external speaker system to improve pedestrian safety. This is especially important for electric and hybrid vehicles which can be difficult to hear at lower speeds due to their drive mechanism. A synthesised sound, dependant on speed, is projected from speakers at the front and rear of the vehicle, making it instantly recognisable that the vehicle is in motion.

Internal Electronic Sound Synthesis allows sound contouring in the cabin, enhancing the driving experience by creating engine speed and throttle dependant sounds audible through the in-car entertainment system. The system delivers audible feedback to drivers even when the engine is silent or, alternatively, it can be used to reinforce an OEM ‘sound DNA’ to the end user.

Harman International, the world-renowned high-end infotainment systems provider, will be the production system integrator and supplier, and will work with vehicle manufacturers on model specific system architecture options. Lotus Engineering, which has over twenty years of experience in Active Noise Control technologies will assist manufacturers with system performance optimisation.

“We are delighted by this agreement with Harman International, which will allow motorists to benefit from the greater levels of refinement and safety in future vehicles which these Lotus technologies enable,” said Mike Kimberley, Chief Executive Officer of Group Lotus plc. “The Active Noise Control technologies are part of a steady stream of ground-breaking innovations that Lotus has brought to the automotive industry and we are committed to pursuing further developments in vehicle refinement and environmentally friendly transport solutions.”
“We are privileged to team up with Lotus for this new development initiative, which will reinforce our mission to deliver exceptional audio and infotainment experiences for automotive customers,” said Dinesh C. Paliwal, Harman’s Chairman and CEO. “The rich sounds of our in-car systems will be complemented by this technology, opening new opportunities for deployment and enjoyment.”

“The utilisation of the Lotus suite of ANC technologies within our extensive product portfolio reinforces our commitment to support the increasing market demand for environmentally conscientious technologies,” said Dr. Klaus Blickle, Chief Executive Officer and President of the Harman International Automotive Division.

The result of the Lotus and Harman International technology collaboration will be to generate Active Noise Control system solutions available to vehicle manufacturers in all worldwide markets. Working systems are ready for production implementation and manufacture. The introduction of affordable noise management systems offers multiple benefits to manufacturers and consumers alike, achieving eco-friendly optimization of vehicle weight reductions and improved CO2 emissions.

March 30, 2009

Lotus Receive the 2008 Dewar Trophy for Technical Excellence

The Royal Automobile Club has named Group Lotus plc as the recipients of the historic Dewar Trophy for 2008. The Dewar Trophy is awarded for an outstanding British technical achievement in the automotive field and the Dewar Trophy Technical Sub-Committee unanimously agreed that Lotus should be recognised for the company’s development of its Versatile Vehicle Architecture (VVA) chassis technology.

Lotus Versatile Vehicle Architecture (VVA) has been developed to exploit the benefits of producing at low to medium volumes but for niche markets. Engineering a bespoke low-volume platform is an expensive, time-consuming solution, whilst sharing a mainstream chassis normally results in compromises in performance and design. VVA exploits Lotus Engineering’s expertise in aluminium, steel and composite body engineering, joining techniques, and vehicle systems integration. This innovative technology offers a fast-to-market, cost-effective approach without the compromise that stems from conventional ‘platform sharing’.

The Lotus Evora enters the sports car market as currently the world’s only mid-engined 2+2. Powered by a Lotus-tuned 3.5-litre V6 engine producing 280PS, and weighing just 1350kg (prototype specification), the Evora promises breathtaking performance and uses a low volume application of Lotus Versatile Vehicle Architecture.

John Wood, Chairman of the Royal Automobile Club’s Dewar Trophy Technical Sub-Committee, said: “The thing that particularly impressed the judges was the single minded determination with which the team at Lotus had sought to find the best possible solution to the particular problem of building an uncompromised lightweight chassis for a low volume road car, and then continually developed and refined that concept to respond to emerging requirements.

“What they have now is a platform system that is not only ideal for high performance sports cars, but also almost infinitely versatile and well suited to the needs of niche vehicle manufacturing in an era where environmental concerns are driving a demand for lightweight structures for a multitude of applications.”

Mike Kimberley, Chief Executive Officer of Group Lotus plc said: “I would like to thank the Dewar Trophy Technical Sub-Committee for the award, and all at Lotus are most honoured to receive this accolade. It is a fantastic achievement for Lotus to win such a prestigious and recognised award for our Versatile Vehicle Architecture technology which is used in our stunning new Lotus Evora sportscar. This award is for everyone at Lotus; those who created the VVA technology, those who delivered the Evora engineering programme and those who are building our car. With incredible hard work and dedication at Lotus, using this technology our excellent staff have delivered the Lotus Evora in 27 months from a clean sheet to the first production car driving off the line, a great achievement.

Mike Kimberley continued. “The automotive industry is changing fast, and technology needs to be robust, faster to market and more cost and mass effective than ever before, and Lotus will be there at the forefront of this exciting period for the future of personal transport.”

The Dewar Trophy Technical Sub-Committee was set up to study automotive engineering excellence and determines if the candidates meet the strict terms of reference for the awarding of the Trophy in a particular year.

Dewar Trophy Technical Sub-Committee
John Wood (Chairman)	Former Managing Director, Motor Industry Research Association
Ben Cussons	Chairman, the Royal Automobile Club Motoring Committee
Alec Osborn MBE	Past President, the Institution of Mechanical Engineers (IMechE)
Karl Ludvigsen	Influential and highly respected motoring author and historian. Former Senior Executive with Ford, Fiat and General Motors
Steve Cropley	Editor-in-Chief, Autocar Magazine

In total eighteen entries were considered in detail by the Dewar Trophy Technical Sub-Committee for 2008, representing a complete cross section of automotive development, covering all types of vehicles, components, engineering and systems and, throughout, technical innovation and development was evident in abundance. 2008 marks the 40^th occasion the Dewar Trophy has been awarded since the first presentation to Dennis Brothers Limited in 1906.

March 9, 2009

Lotus expands Chinese Joint Venture

Youngman Lotus, a joint venture between Youngman Auto and Lotus Engineering, has started expanding its Lotus-brand sales network to cover China’s first-tier and second-tier markets by setting up 100 4S stores nationwide by the end of this year. The network will initially focus on the Europestar Lotus RCR (Jingsu) and Persona (Jingyue) models. The ventures manufacturing bases in Guizhou, Shandong and Hangzhou all will be starting mass production this year, with a combined capacity of 450,000 vehicles.

[Gasgoo.com via Lotus Enthusiast]

March 2, 2009

Lotus Omnivore Research Engine Unveiled

Lotus Engineering has just shown of its latest engine concept at the Geneva Motor Show. The Lotus Omnivore Research Engine combines a variable compressions ratio with direct fuel injection in a two stroke cycle to both enhance efficiency and allow maximum flexibility in terms of fuel type.

Full press release below:

Lotus Engineering, the world-renowned automotive consultancy division of Lotus Cars Limited, unveils its latest research into engine efficiency at the 79th International Geneva Motor Show. The Omnivore engine concept has the potential to significantly increase fuel efficiency for sustainable alcohol based fuels, which increases the prospect of a greater amount of vehicle miles travelled using renewable fuels. On display will be the single cylinder research engine monoblock that demonstrates the novel architecture designed for high thermal efficiency when fuelled on any alcohol based fuel or gasoline.

The Omnivore concept features an innovative variable compression ratio system and uses a two-stroke operating cycle with direct fuel injection. It is ideally suited to flex-fuel operation with a higher degree of optimisation than is possible with existing four stroke engines.

The engine concept features a monoblock construction that blends the cylinder head and block together eliminating the need for a cylinder head gasket, improving durability and reducing weight. In this case, the application of a monoblock is facilitated by the absence of the requirement for poppet valves. A novel charge trapping valve in the exhaust port allows asymmetric timing of exhaust flow and continuous variation of the exhaust opening point.

The variable compression ratio is achieved by the use of a puck at the top of the combustion chamber. This simple, yet effective system moves up and down affecting the change in geometric compression depending on the load demands on the engine.

Mike Kimberley, Chief Executive Officer of Group Lotus plc said: “We are delighted to unveil this major milestone in the development of an engine configuration for a new breed of more efficient multi-fuel engines. The automotive sector is focusing on its environmental obligations to improve efficiency, minimise reliance on fossil fuels and reduce harmful emissions and Lotus continues to be an industry leader through our work on all aspects of future fuels. Sustainable alcohol based fuels have the potential to reduce the overall CO2 footprint of internal combustion engines towards zero and for this reason, need to be embraced as future fuels for road transport.”

In this collaboration with Queen’s University Belfast and Orbital Corporation Limited Australia, with sponsorship from DEFRA/DECC and DOE NI through the Renewables Materials LINK programme, Lotus Engineering is currently in the final stages of commissioning the Omnivore single-cylinder research engine. It uses the Orbital FlexDI(TM) fuel injection system which produces fine in-cylinder fuel preparation irrespective of fuel type, and together with air pre-mixing allows efficient two-stroke combustion and low-temperature starting, whilst offering singular opportunity for advanced HCCI control.

The Omnivore programme is another development of Lotus’ research into understanding the complex combustion processes involved in running an engine on mixtures of alcohol based fuels and gasoline, which included the Lotus Exige 270E Tri-fuel, unveiled at the International Geneva Motor Show in 2008. This research is vitally important for a successful transition from today’s fuels to the more efficient sustainable fuels of the future.

Geraint Castleton-White, Head of Powertrain at Lotus Engineering said, “The absence of poppet valves in two-stroke engines makes the incorporation of a variable compression ratio system relatively straightforward. Our research into these systems on four-stroke engines has led us to the conclusion that while thermodynamically it is a desirable technology to incorporate, practically it is very difficult, particularly taking into consideration production feasibility. This two-stroke engine could solve these practical difficulties and simultaneously permits a much larger range of compression ratio adjustment, with the potential to perform at a much higher efficiency when running on renewable fuels.”

About Group Lotus plc:
The main operating subsidiary of Group Lotus plc is Lotus Cars Ltd, which has two operating divisions – Lotus Engineering and Lotus Cars. Lotus Engineering is an internationally recognised automotive engineering consultancy based in Norfolk, UK. Global facilities include those in Michigan (USA), Kuala Lumpur (Malaysia), China and offices in Germany and Japan, with rapid expansion in new territories such as South East Asia and the Gulf States.

Lotus Engineering provides comprehensive and versatile consultancy services to many of the world’s OEMs and Tier 1 suppliers, offering a full engineering service from initial concept and project design through development and integration of the complete vehicle to meet all worldwide markets and customers to full production. This includes third party ‘niche vehicle’ engineering and manufacture worldwide.

Lotus Cars builds world class, prestige, high performance sports cars for sale in 37 countries. These include the iconic Lotus Elise, the Exige and Europa. Lotus is a global high-tech company, expanding rapidly and committed to driving forward technology for both Lotus Cars and its Engineering clients, spearheading research into such areas as hybrids, electric vehicles and renewable fuels.