Swirl chamber arrangement for diesel engine or the like.

摘要

In a pre-chamber type diesel engine, in order to prevent droplets of liquid fuel finding their way into zones of the main combustion chamber (108) wherein they undergo slow combustion and thus tend to form smoke, a recess (120) is formed at the main combustion chamber end of an auxiliary transfer passage (114) in a manner to provide a wall section (122) which deflects droplets of fuel, which have passed through the auxiliary passage during the induction phase and/or initial stage of the compression phase, in a manner that they do not escape toward the perimeter of the piston crown and remain in a zone through which the flame produced by spontaneous combustion of the highly compressed airfuel mixture in the pre-chamber (112) passes thus ensuring rapid vaporization and subsequent oxidation.