Homogeneous Lean Burn Engine Combustion System Development - Concept Study
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To achieve superior efficiency in combination with high performance and low emissions, Toyota Motorsport and FEV Europe have realized an ultra-lean spark ignition combustion process in a joint concept development project. Targets of 46 % net indicated efficiency and specific power of 103 kW/l have been initially set and successfully achieved by combining different key technology features as described in this publication.
In principle, the homogeneous lean burn engine has a high potential to achieve superior thermal efficiency combined with low NOxemissions. Therefore, Toyota and FEV have performed a joint project by developing a lean burn spark ignition engine with high thermal efficiency. The purpose of the project was to design an engine combustion system that is capable of fulfilling the conflicting targets of excellent efficiency and high performance. This paper is composed of two main parts. The first part addresses the process of engine combustion system development;...