SYSTEM / Control System Inching Control (HST Pump) Purpose: Inching control limits the HST pump delivery flow rate according to the brake pedal depressing amount and applies the HST brake. Operation: 1. The brake pedal depressing amount (angle) is transmitted to the brake pedal angle sensor through the link and converted into the signal. 2. The signal is sent to the HST control unit from the brake pedal angle sensor. The signal varies according to the brake pedal depressing amount (angle). 3. The HST control unit converts into 0 to 100% for the inching angle converted value according to the input signal. 4. The HST control unit computes the inching angle converted value according to the signal from the brake angle sensor, and controls the displacement angle in order to limit the HST pump displacement angle according to the inching angle converted value. (Refer to Hydraulic System / Inching Circuit.)
Brake Pedal
Brake Pedal Angle Sensor
HST Control Unit T4FG-02-01-004
Brake pedal is not depressed.
Brake pedal is depressed fully.
HST Brake Applied Range Brake Pedal
T4FG-02-01-005
T2-1-7
