| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a second stage fuel injection is rushed to a combustion gas based on the fuel injected in a first stage, which was caused when performing a two-stage injection in a conventional combustion system for direct injection type diesel engine. SOLUTION: This combustion system for diesel engine comprises a combustion chamber provided on the top of a piston arranged in a cylinder so as to be capable of reciprocating, and a multistage injectable fuel injection device for injecting the first stage fuel toward the combustion chamber during at least a compression stroke and then performing the second stage injection in a timing closer to the compression top dead center from the fuel injection timing of the first stage. The combustion chamber is provided with a stepped part for colliding the injected fuel, and the fuel injection device is constituted so as to perform the first stage injection to the lower part in the combustion chamber and collide the second stage injection to the stepped part.
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