770 and 772 Off-Highway Truck Chassis Electronic Control System Caterpillar


General Information

Usage:

770 BZZ



图 1g01329973

注: 在机器基本操作期间,并非结构图中的所有部件都是必需的。

概述

ECM 控制机器上的不同系统。 以下信息是 ECM 控制的系统概述。

ECM 控制着变速箱的换档点。 进行变速箱换档所需的基本部件及其相应要求如下:

产品标识 - 产品标识来自监测系统。 换挡策略在不同的机器型号上不同。 ECM 必须了解系统的型号,以正确操作。 该信息由监测系统提供给 ECM。

变速箱输出转速传感器(TOS) - ECM 必须要知道变速箱的输出转速。 两个 TOS 传感器告知 ECM 变速箱输出轴的转速。 该 TOS 提供此信息。

当操作员选择前进档时,ECM 自动为变速箱换挡。 换挡根据变速箱输出转速进行。 自动换挡点储存在 ECM 中。 当变速箱输出转速与换挡点相匹配时发生换挡。 当 TOS 增加到一个换挡点,ECM 激活正确的电磁阀以更改变速箱档位。

注: 变速箱输出转速与地面速度和发动机转速成直接比例。 这在变速箱处于直接传动时发生。 换挡点基于计算的发动机转速。

Caterpillar Information System:

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