发明名称 |
INTERNAL COMBUSTION ENGINE |
摘要 |
An internal combustion engine includes: a spark plug arranged in the upper wall face of the combustion chamber; an in-cylinder injection valve that, when stratified charge combustion operation is performed, injects fuel into the combustion chamber so that a fuel spray is carried to the periphery of the spark plug by a tumble flow; a piston having, in a crown surface thereof, a concave portion formed so as to extend in an orthogonal direction to the axis line of a piston pin hole, and so that the depth changes in the direction of the axis line; and a bias flow generation apparatus that, in a case where stratified charge combustion operation is performed with an ignition timing retardation, generates a bias in a flow of intake air inside an intake port so that intake air is guided towards the relatively deep part in the direction of the axis line. |
申请公布号 |
US2016281589(A1) |
申请公布日期 |
2016.09.29 |
申请号 |
US201615011890 |
申请日期 |
2016.02.01 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
ASHIZAWA Takeshi |
分类号 |
F02B23/10;F02B17/00;F02F3/28 |
主分类号 |
F02B23/10 |
代理机构 |
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代理人 |
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主权项 |
1. An internal combustion engine in which a tumble flow is generated inside a combustion chamber, comprising:
a spark plug arranged in an upper wall face of the combustion chamber; an in-cylinder injection valve configured, when stratified charge combustion operation is performed, to inject fuel into the combustion chamber so that a fuel spray is carried to a periphery of the spark plug by a tumble flow; a piston having, in a crown surface thereof, a concave portion that is formed so as to extend in an orthogonal direction to an axis line of a piston pin hole and so that a depth of the concave portion changes in a direction of the axis line; and a bias flow generation apparatus configured, in a case where stratified charge combustion operation is performed in a state in which an ignition timing is retarded relative to an optimal ignition timing, to generate a bias in a flow of intake air inside an intake port so that intake air is guided towards a part at which the depth is relatively deep in the direction of the axis line inside the concave portion. |
地址 |
Toyota-shi JP |