| 摘要 |
PROBLEM TO BE SOLVED: To provide a direct injection type combustion chamber for diesel engine wherein turbulence disturbing generation of a squish flow 14 is prevented to be generated, and the squish flow 14 is smoothly generated. SOLUTION: In this direct injection type combustion chamber for diesel engine, a swirl chamber 2 is provided inside a piston head 1, a swirl chamber entrance 4 opens on a ceiling wall 3 of the swirl chamber 2, a squish surface 5 is formed on an opening periphery part of the swirl chamber entrance 4, and fuel spraying 8 is performed from a porous injection nozzle 6 to an inner peripheral surface 7 of the swirl chamber 2. A recessed part 25 stepped down from the squish surface 5 to the swirl chamber 2 is formed on a boundary between an inner peripheral surface 9 of the swirl chamber entrance 4 and the squish surface 5.
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