发明名称 |
Direct-injection spark-ignition engine |
摘要 |
<p>Disclosed is a direct-injection spark-ignition engine designed to promote catalyst activation during cold engine operation. A fuel injection timing for a fuel injection period in an compression stroke (second fuel injection period F2) is set to allow a first fuel spray Ga injected from a first spray hole 40a to enter a cavity 34 in a piston crown surface 30, and allow a second fuel spray Gb to impinge against a region of the piston crown surface 30 located closer to an injector than the cavity 34, so as to cause the second fuel spray Gb having a lowered penetration force due to the impingement to be pulled toward the cavity 34 by a negative pressure generated in the cavity 34 as a result of passing of the first fuel spray Ga therethrough, The direct-injection spark-ignition engine can maximally hold an injected fuel spray around a spark plug to reliably stabilize a combustion state in a combustion mode for promoting catalyst activation during cold engine operation, while enhancing combustion efficiency in a homogenous combustion mode during normal engine operation.
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申请公布号 |
EP2146070(A3) |
申请公布日期 |
2012.10.24 |
申请号 |
EP20090165482 |
申请日期 |
2009.07.15 |
申请人 |
MAZDA MOTOR CORPORATION |
发明人 |
NISHIMOTO, TOSHIAKI;WATANABE, TOMOMI;NAKAYAMA, YOSHITERU;FUJIKAWA, TATSUYA;YAMAKAWA, MASAHISA |
分类号 |
F02B23/10 |
主分类号 |
F02B23/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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