3500B and 3500B High Displacement Generator Set Engines Caterpillar


Cold Cylinder Cutout

Usage:

3516B 1NW
在起动后和在寒冷天气长期怠速期间,本发动机使用将处于冷缸断缸的策略来减少白烟。

冷起动和/或长时间低怠速运转时,发动机电子控制模块 (ECM) 一次关闭一个单体喷油器,以确定是否通过监控燃油齿条中的变化将各气缸点火。 如果某一缸发火,ECM 就会接通该缸的喷油器。 如果某一缸不发火,该缸的喷油器就会被断开。 冷缸断缸具有以下优点:减少白烟、改善发动机起动、减少使用乙醚喷射和缩短暖机时间。

注: 冷缸断缸操作期间,发动机可能给人感觉好象是缺火。 这是正常的。 没有必要采取如何纠正措施。

冷缸断缸操作是在满足下述所有条件的基础上才启动的:

  • 冷缸断缸被编程设定为启用。

  • 发动机转速等于或低于高怠速。

  • 燃油齿条小于 13 mm (0.50 inch)

  • 水套水冷却液温度低于 63 °C (145 °F)

冷缸断缸策略在发动机起动,发动机达到怠速转速 10 秒钟之后或乙醚喷射结束 3 秒钟之后才启动。

如果符合下述任一条件,冷缸断缸就会停止操作:

  • 可通过 Cat® 电子技师 (ET) 来停止冷缸断缸操作。

  • 水套水冷却液温度升高到 70 °C (158 °F) 以上。

  • 启动了断缸测试。

  • 使用了乙醚喷射。

  • 冷却液温度传感器有故障。

如果燃油齿条大于 13 mm (0.50 inch),冷缸断缸将停用 3 秒钟。

当冷缸断缸操作开始后,发动机的转速变化超过 ± 50 rpm 时,冷缸断缸将会停止操作 3 秒钟。 新的发动机转速会在冷缸断缸操作重新启动时建立起来。

当发动机转速处于低怠速 10 秒钟,发动机转速降至低怠速以下超过 50 rpm 时,冷缸断缸就会停止操作 30 秒钟。

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