784C, 785C, 785D, 789C, 789D, 793C and 793D Off-Highway Trucks Power Train Electronic Control System Caterpillar


Neutral Start Function

Usage:

785C 1HW
空档起动功能会限制发动机在换档杆未处于空档的情况下起动。 启用这一功能时,ECM 会使起动继电器工作,然后该继电器会盘动起动马达。

满足以下三个条件时,即可启用此功能。

  • 换档杆在空档位置。

  • 钥匙起动开关在 START 位置。

  • 发动机转速为零。

换档杆开关会告知 ECM 换档杆处于空档位置。 钥匙起动开关告知 ECM 钥匙起动开关在 START 位置。 停车制动开关告知 ECM 停车制动器是否接合。

ECM 还可执行防起动功能。 此功能在电气系统电压高于 36 伏时即启用。 ECM 会内部监测连接器接触件 J1-1 上的电气系统电压(蓄电池正极)。 此功能可在不当地跨接起动机器时保护电气系统。 启用此功能时,ECM 不会让起动继电器工作。

如果发动机转速大于 300 转/分,ECM 将使起动机自动松开。

如果机器配有发动机预润滑功能,那么除非预润滑功能完成或使用手动超弛,否则 ECM 不会接合起动机。 如果使用了预润滑超驰,发动机 ECM 会记录预润滑超弛事件。

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