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发明授权
CN107110004B 直喷发动机的燃烧室构造 有权

直喷发动机的燃烧室构造
摘要：
燃料喷射阀(6)设置在气缸盖(13)的天棚部(170)。放电电极(火花塞(7)的顶端部与该燃料喷射阀(6)的喷射阀顶端相邻而设。在天棚部形成有收纳放电电极的顶端部的凹部(131)。形成在活塞(16)上的空腔(163)的中心偏离气缸的缸径中心。在沿通过燃料喷射阀的喷射阀顶端和放电电极的顶端部的平面将燃烧室(17)切开后而形成的纵向断面上，夹着喷射阀顶端设置有放电电极一侧的空腔的壁面形状和相反一侧的空腔的壁面形状构成为：保证该夹着喷射阀顶端设置有放电电极一侧的空腔的壁面与喷射阀顶端之间的距离比该相反一侧的空腔的壁面与喷射阀顶端之间的距离长。
摘要（英）：

A fuel injection valve is provided for a ceiling portion of a cylinder head. A tip of an ignition electrode is arranged in the vicinity of an injection tip of the fuel injection valve. A recess is provided for the ceiling portion. A center of a cavity is shifted with respect to a bore center of the cylinder. In a vertical cross-section of the inside of a combustion chamber taken along a plane passing through the injection tip of the fuel injection valve and the tip of the ignition electrode, a distance from the injection tip to a wall surface of the cavity at a side at which the ignition electrode is provided is longer than a distance from the injection tip to a wall surface of the cavity at an opposite side.

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