Swirl chamber type combustion chamber for diesel engine.

摘要

A swirl chamber type combustion chamber for a diesel engine has an injection passage (2) to guide a stream of combustion gas gradually spreading right and left during injection from a swirl chamber (3) to the main combustion chamber (1), a top surface of a piston head (8) is provided with a concavity (7) formed in such a configuration as gradually spreading right and left as progressing from the inlet end (10) to the outlet end (12) thereof, for example like an unfolded-fan. The inlet end (10) of the concavity is located so as to face to the outlet of the injection passage (2). The stream of combustion gas injected from the injection passage is to be guided so as to be sufficiently diffused in the main combustion chamber by the concavity.