3524B Engines for 797 and 797B Off-Highway Trucks Caterpillar


Ether Control System

Usage:

3524B 1AW


注意

过量使用乙醚会造成活塞和活塞环损坏。 只在寒冷天气起动时才使用乙醚。


盘车起动时电子控制模块(ECM)会自动喷射乙醚。

可提供开关输入,使操作员可手动喷射乙醚。

注: 要确定设备是否有手动乙醚开关,请参阅操作和保养手册, "操作部分"。

开关输入(如有配备)使操作员可在以下条件下手动喷射乙醚:

  • 乙醚控制参数编程设定为 "ON"(开启)。

  • 启动乙醚喷射瞬时触点开关。

  • 发动机转速超过 75 rpm。

  • 水套水温度低于 30 °C (86 °F)。

在满足以下情况时,ECM 会自动向进气歧管喷射乙醚:

  • 乙醚控制参数编程设定为 "ON"(开启)。

  • 发动机转速在 75 rpm 与 400 rpm 之间。

  • 水套水冷却液温度低于 30 °C (86 °F)。

乙醚喷射的持续时间与水套水冷却液温度成线性变化。 乙醚喷射的持续时间在以下范围内变化:

  • 在最高温度 30 °C (86 °F )时是10秒钟

  • 在最低温度 −40 °C (−40 °F) 时是130秒钟

即使水套水冷却液温度低于 −40 °C (−40 °F),乙醚喷射的最长持续时间也是 130 秒钟。 请参阅插图 1。




图 1g00769594

水套水温度和乙醚喷射持续时间

(Y) 温度 (°C)

(X) 时间(秒)

对于故障诊断和排除,技术人员可使用一个超越来驱动乙醚系统。 使用 Caterpillar 电子技师(ET)可启动和停止乙醚喷射。 乙醚电磁阀会保持通电,直到发生以下任一情况:

  • 发动机转速出现。

  • 维修工具的超越用于终止喷喷射。

  • 技术人员退出维修工具的超越功能。

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