Low Co2 With High Performance Is Affordable And Available

[Mark H]

Low CO2 with high performance is affordable and available

240Nm, 160ps and 15% CO2 Reduction

Lotus Engineering, the automotive consultancy division of Lotus, and Continental Division

Powertrain have presented the results of their “Low CO2” research collaboration. The Low CO2

vehicle concept is being proposed as a practical option for manufacturers to reduce their fleet

average CO2 emissions.

The Low CO2 vehicle concept is demonstrated in an Opel Astra and uses a Lotus Engineeringdesigned

pressure-charged three-cylinder 1.5-litre gasoline engine integrated with a number of

Lotus and Continental technologies. It features an innovative integrated exhaust manifold

design, centrally-mounted injectors, cam profile switching for lift and timing, a high pressure fuel

pump, and a mild hybrid drive. The Low CO2 Astra produces a g/km CO2 reduction of 15%

against the naturally aspirated 1.8 litre 4 cylinder engine version of the same vehicle. While

forging comparisons to the most frugal B-segment cars, the Low CO2 Astra – on the NEDC

(New European Driving Cycle) – produces performance figures that are comparable to market

leading C-segment cars with larger engines.

Comparison Table

Performance Data

g/km CO2 Torque Power

Lotus/Continental Low CO2 3

Cylinder 1.5L Opel Astra

149

240 Nm / 177 lbft

160 PS / 118 kW / 158 hp

Opel Astra 4 Cylinder 1.8L *

175

175 Nm / 129 lbft

140 PS / 103 kW / 138 hp

Typical 4 Cylinder 2.2L DI Engine

Not Applicable 220 Nm / 162 lbft

155 PS / 114 kW / 153 hp

Relative Improvement demonstrated by Lotus/Continental Low CO2 Concept

Improvement of Low CO2 concept

compared with:

Opel Astra 4 Cylinder 1.8L

15% 36% 14%

Typical 4 Cylinder 2.2L DI Engine

Not applicable 9% 3%

*Official Opel Technical Data

 

The primary objective of the Low CO2 project was to deliver greatly reduced CO2 emissions

while maintaining an engaging driving experience from an affordable set of technologies. The

solution employs a cleverly integrated set of powertrain systems within a downsized overall

package.

The collaboration concluded in early February with the completion of extensive dynamometer

and road testing at Continental’s facility in Toulouse, France and Lotus Engineering’s Hethel

Headquarters in the UK. The programme was grant-aided through the UK’s Energy Saving

Trust’s Low Carbon R&D Programme funded by the UK Government’s Department for

Transport.

Mike Kimberley, Chief Executive Officer of Group Lotus plc, said: “Through intelligent integration

of a range of proven and newly available technologies, we have delivered a car that engages

and excites the keen motorist with the superb power and torque figures and crucially has a

lower impact on the environment. The most important part of this project is that the solution is a

combination of technologies that are available and can be implemented in next generation

models and with further work beyond the scope of this initial project, dramatic reductions in CO2

can theoretically be achieved.

He continued: “I am very pleased with what has been achieved in this project. Lotus

Engineering is leading the industry across a number of advanced green powertrain

technologies, including electric vehicles, hybrids, bio-fuels and developing more efficient

gasoline and diesel engines. We believe a crucial factor in the adoption of green cars in the

future will be ensuring they remain fun to drive. This Low CO2 collaboration with Continental

Division Powertrain proves that objective has been reached.”

Dr. Hans Nuglisch, Senior Manager of this Low CO2 project at Continental Division Powertrain,

said: “The cooperation with our partner, Lotus Engineering, has shown once again, that there is

still an enormous potential for additional innovation within the internal combustion engine.

Obviously electronics and mechatronics are making vehicles more economical without

compromising driving fun. Additionally turbo charging combined with direct injection means

 

noticeably better fuel economy and lower CO2 emissions for the gasoline engine. With our

advanced expertise in low CO2 know how, we provide clear benefits for our customers and will

further strengthen and improve our role as systems integration experts."

Transport Minister Jim Fitzpatrick said, "I am determined that transport should play its part in

tackling climate change, so it is essential that our strategy focuses on driving forward new

technologies to make engines greener. This engine is one of the more environmentally-friendly

petrol engines around, raising the standard for others to meet. I am pleased the Government

was able to support this project through the Low Carbon Research and Development

programme and look forward to the day when this type of technology becomes commonplace

on our roads"

"With over 20% of the UK's total carbon emissions produced by road transport every year,

technological advances in this area are vital,” explains Philip Sellwood, Chief Executive of the

Energy Saving Trust, which is managing the initiative. “This project is an exciting opportunity for

innovative technologies to be developed and showcased."

Lotus brought to the project its world-class powertrain design, development, testing and

validation capabilities, with specific expertise in engine downsizing and systems integration.

Continental Division Powertrain supplied its extensive experience in powertrain management

and control systems, especially in the areas of direct fuel injection systems, hybrid drives,

energy management, emission after-treatment and a number of new technologies.

 

Technical details>>>

Technical specification of the Low CO2 engine when installed in Opel Astra:

Cylinders: 3

Displacement: 1.5 litres

Bore: 88mm

Stroke: 82mm

Compression ratio: 10.2:1

Fuel pump pressure: 200bar

Emissions (NEDC): 149 g/km CO2 meeting Euro 5 Emission standards

Max power: 160ps @ 5000rpm

Max torque: 240Nm @ 2500rpm - 4000rpm

Mild hybrid motor output: 12kW

Mild hybrid energy storage system: 60v supercapacitors

Key features of the Low CO2 engine in detail:

CPS switching tappets:

Lotus Engineering’s Cam Profile Switching system incorporates lobed tappets that vary valve lift

and timing. The system is produced under licence by INA and features in Porsche products in

its ‘VarioCam Plus’ system.

High pressure fuel pump:

Continental Division Powertrain’s single cylinder fuel pump driven directly from the tri lobe cam

on the exhaust camshaft.

Fuel injectors:

Affordable, 200bar, solenoid, DI centrally mounted injectors by Continental Division Powertrain.

Smart Coolant Pump and Demand Regulated Intank Fuel Pump:

Continental Division Powertrain's electric water and fuel pumps could save up to 2% of fuel.

Mild Hybrid Drive:

The Continental Division Powertrain system features unique water cooled motor housing to

match transmission to engine block.

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 on most gasoline-engined passenger vehicles. An

integrated exhaust manifold has potential to:

o Reduced parts count: 35% fewer components resulting in lower inventory, production,

logistics and aftermarket costs

o Weight reduction: total system mass reduction of 20% resulting from elimination of

separate exhaust manifold

o Improved engine durability

HOTFIRE

The Low CO2 project exploits the findings of the HOTFIRE project, a previous research

programme led by Lotus Engineering and also including Siemens VDO, Loughborough

University and University College London. HOTFIRE, which started in October 2004, was based

at Loughborough University to explore a permanent homogeneous charge direct injection

strategy through the use of centrally-mounted injectors.

 

Lotus_Low_CO2.pdf

 

This post has been promoted to an article