摘要 |
A stratified burning internal combustion engine according to this invention is equipped with an intake port (46,46A,46B) and an injector (12) so that stratified tumble flows (Fa,Fm,Fa) of different fuel concentrations can be formed in a combustion chamber (30). A spark plug (11) is provided in the combustion chamber to ignite at least one of the tumble flows, said at least one tumble flow (Fm) being rich in fuel. To promote the stratified tumble flows, a top wall (34) of a piston (26) has an inclined wall. This makes it possible to strengthen the tumble flows, whereby the stratification of an air-fuel mixture in the combustion chamber can be improved further to permit lean burn at a larger air/fuel ratio. <IMAGE> |