Technical Paper
Combustion System of a Lean-Burn Piston Engine with Catalytic Prechamber
2001-03-05
2001-01-1186
In the present work it is proposed to improve the efficiency of an Otto engine by development of a system with assisted catalytic ignition and combustion. The system is characterized by the use of a lean mixture in a swirling charge, substantial increase of the compression ratio, and application of a catalytic prechamber. For a long time, the combustion of lean mixtures has been one of the most important tendencies in development of gasoline engines. To be able to burn lean mixture at full load it is necessary to induce intense swirl in the combustion chamber and to increase compression ratio. One of the possible ways to burn lean homogeneous mixture is to use the combustion system made up of a main combustion chamber and prechamber. The latter is fed with the same lean homogenous mixture as the main combustion chamber, but it contains catalytic insert, kept at temperatures high enough, to secure catalytic reactions and torch ignition of the main charge.