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Direct injection gasoline engine and method of controlling the direct injection gasoline engine

机译：直喷汽油发动机和控制直喷汽油发动机的方法

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A direct injection engine includes an ignition assistance section applying energy to fuel injected into a cylinder using an injector to assist auto-ignition combustion of the fuel when the engine is within an auto-ignition combustion operation range. A start time of fuel injection is set within a period from a terminal stage of a compression stroke to a compression top dead center. The energy is applied to the fuel injected into the cylinder in a period from start of the fuel injection to an initial stage of an expansion stroke such that a time of a specific crank angle when an increase rate of in-cylinder pressure, which is a ratio of a change in the in-cylinder pressure to a change in a crank angle in motoring the engine, reaches a negative maximum value overlaps a combustion period when a combustion mass percentage of the fuel ranges from 10% to 90%.
机译：直喷式发动机包括点火辅助部分，当发动机处于自燃燃烧操作范围内时，该点火辅助部分利用喷射器向喷射到气缸中的燃料施加能量，以辅助燃料的自燃燃烧。燃料喷射的开始时间被设定在从压缩冲程的末级到压缩上止点的时间段内。在从燃料喷射开始到膨胀冲程的初始阶段的时间段内，将能量施加到喷射到气缸中的燃料，使得当缸内压力的增加速率为特定曲柄角时，该时间为特定曲柄角的时间。当燃料的燃烧质量百分比在10％至90％的范围内时，在驱动发动机时缸内压力的变化与曲柄角的变化之比达到负最大值与燃烧时间重叠。

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