770G and 772G OEM Off-Highway Truck Caterpillar


Transmission Control

Usage:

770G RMD



图 1g02404777

变速箱控制

(1) 变速箱操纵杆

(2) 举倾机构操纵杆

(3) 变速箱操纵杆锁定

(4) 变速箱升档开关

(5) 变速箱降档开关




图 2g02211939

变速箱操纵杆

(6) 变速箱操纵杆位置传感器

变速箱操纵杆 (1) 和举倾机构操纵杆 (2) 均位于控制台上。 控制台位于操作员座椅右侧。

变速箱有七个前进速度档和一个倒档速度档。

变速箱操纵杆 (1) 从 "P"(停车)位置, "R"(倒退档)位置, "N"(空档)位置 和 及 "D"(行车)位置变换到 "N"(空档)位置之前,应按下锁 (3) 。

当变速箱操纵杆 (1) 处于 "P" (停车)位置时,停车制动器接合。

将变速箱操纵杆 (1) 置于 "1"(第一档)位置或 "2"(第二档)位置时,仅接合指示的档位。 将变速箱操纵杆 1 置于 "1"(第一档)位置或 "2"(第二档)位置时,允许变速箱自动升档或自动降档。 这个功能允许操作员在较差路况运行时将变速箱固定于较低档位。

将变速箱操纵杆 (1) 置于 "D"(行车)位置时,变速箱将启用自动升档和自动降档。 使用变速箱换档杆中的升档开关 (4) 和降档开关 (5) 来选择最高档位。 按下最高档位升档开关,将选定最大值的最高档转换到下一个较高档至第七档。 按下最高档降档按钮,将选择最大值最高档降至下一个较低档至第一档。 在变速箱档位显示屏上显示选定的最高档和实际档位。

位置传感器 (6) 为底盘电子控制模块(ECM)提供有关变速箱换档杆 (1) 的位置信息。 换档杆开关与换档控制台内部的位置传感器进行机械式连接。

位置传感器 (6) 为脉冲宽度调制(PWM)传感器。 位置传感器向底盘 ECM 发送(PWM)信号。 底盘(ECM)确定所需的变速箱档位,并对变速箱离合器调节阀电磁阀通电,以便升档或降档变速箱。

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