Multi-cylinder 4-cycle engine
专利汇可以提供Multi-cylinder 4-cycle engine专利检索，专利查询，专利分析的服务。并且PURPOSE:In a multi-cylinder engine whose ignition intervals are irregular, to increase an output of the engine as a whole by heightening the compression ratio of at least one cylinder having a suction valve which opens at high rotational speeds and accordingly enhancing the heat efficiency of this cylinder. CONSTITUTION:Since a suction valve 13 of a first cylinder opens and closes in the range of lower rotational speeds than those at which a suction valve 13 of a second cylinder is operated, the period of time for which the valve opens is so short that a suction amount is insufficient. The compression ratio is consequently reduced to cause a decrease in the heat efficiency. For this reason, a cylinder head 6 is shallowly scooped out so as to reduce the volume of a combustion chamber 7 and heighten the compression ratio. As a result, even if an amount of fresh air aspirated into the cylinder is insufficient compared with that aspirated into the other cylinder, the heat efficiency of this cylinder is heightened to cause an increase in an output of the engine as a whole.，下面是Multi-cylinder 4-cycle engine专利的具体信息内容。
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