Compression - Test
只能使用气缸压缩压力测试来比较一台发动机的各个气缸。 如果一个或多个气缸的差值超过 350 kPa (51 psi),则可能需要修理该气缸及其相关部件。
不应只使用压缩压力测试来确定发动机的状况。 还应进行其他测试来确定是否需要调整或更换部件。
进行压缩性能测试之前,先确保存在下列条件:
- 蓄电池状况良好。
- 蓄电池已完全充电。
- 起动马达工作正常。
- 气门间隙正常。
- 已拆卸所有预热塞。
- ECM 已通电。
- 燃油压力传感器已连接。
- 吸油控制阀已连接。
- 拆下预热塞 (1) 。 请参阅拆解和组装, "电热塞 - 拆卸和安装",以了解正确的程序。
Show/hide table
图 1 | g02647199 |
典型示例 |
- 将一个用于测量气缸压缩压力的适当仪表安装到预热塞 (2) 的孔中。
- 拆下预热塞的保险丝。
- 操纵起动马达来转动发动机。 记录压缩压力表上显示的最大压力。
- 对所有气缸重复步骤 2 和 4。
- 安装预热塞的保险丝。
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