A New-Generation Lean Gasoline Engine for Reduced CO₂ in an Electrified World

Authors

Dr. R. Osborne, A. Lane, Ricardo, Shoreham-by-Sea;
N. Turner, Dr. L. McWilliam, Dr. N. Hinton, M. McAllister, J. Geddes, Jaguar Land Rover, Coventry;
Dr. J. Gidney, Dr. J. Cleeton, Johnson Matthey, Royston;
Dr. P. Atkins, Prof. R. Morgan, University of Brighton

Year

2019

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 811

Summary

In an era of rapidly increasing vehicle electrification, the gasoline engine remains a vital part of the passenger car powertrain portfolio. Lean-burn combustion is a formidable means for reducing the CO₂ emissions of new gasoline engines, but demands the use of sophisticated emissions control.
A 2.0 litre turbocharged direct-injection gasoline engine has been developed, with a lean-homogeneous combustion system matched to a robust lean and stoichiometric-capable exhaust aftertreatment. The engine is equipped with a continuously-variable valve-lift system, high-tumble ports and a high-energy ignition system, and the boosting system comprises a variable-geometry turbocharger and a 48 V electrical supercharger.
The work reported forms part of the PaREGEn (‘Particle Reduced, Efficient Gasoline Engines’) project under the Horizon 2020 framework programme. In this project, further development of gasoline engines as used in mid-sized and premium-sized cars is being undertaken, with the objective to reduce CO₂ emissions by 15% under Euro 6d RDE legislation, and with particle number emissions measured down to 10 nm.
The simulation, design and development of the lean combustion system and key engine and aftertreatment components are described. A prototype multi-cylinder engine and vehicle have been assembled and tested: experimental results detailing the fuel consumption, performance and emissions are presented.