DIRECT INJECTION DIESEL ENGINE

摘要

A center cavity (13) made up of a circular recess is formed in a head (4a) of a piston (4). An injector is provided for injecting fuel into the center cavity. Sub-cavities (14) are formed to be connected to the center cavity on the periphery side of the head (4a). The injector is positioned to inject fuel to a border portion (17) between the sub-cavities (14) and the center cavity.