Description

DESCRIPTION

An electronically controlled system manages automatically the clutch insertion and release operations, replacing the traditional pedal control. This ensures the ideal regulation both when starting and stopping the car, and when changing gear.

A special control unit manages the whole system.

The control unit receives signals from the sensors that detect :

• the intention to change gear (sensor on gear lever);
• the current gear (two position sensors indicate the current gear or idling)
• accelerator pedal pressure (throttle position sensor).

The control unit then sends a command to an electric motor (d.c.) through a power module: this motor electromechanically activates, through a hydraulic connection, the traditional clutch control, consisting of a master cylinder, actuator cylinder etc..

A potentiometric position sensor acts as feedback to inform the control unit of the actual position of the piston controlled by the motor.

A solenoid valve enables the clutch enagagement even if there is a system fail-ure.

Furthermore, the control unit actuates a safety and alarm logic that detects mistaken or hazardous manoeuvres by the driver and warns through a buzzer, or by inhibiting the car start-up (consent to starter motor).

The control unit also has a diagnostics system to find system faults and actuate an emergency logic.

For further details, see DESCRIPTION AND OPERATION 1820E.

The system is controlled by the control unit in the engine compartment near the electro-hydraulic group containing the electromechanical actuator and by two relays, also located in the engine compartment, near the e.i. control unit..

The power supply lines for the control unit and system components (sensors and actuators) are protected by two fuses located near the two relays.

The power module that controls the electro-mechanical actuator is supplied by a power supply fuse in the engine compartment, next to the MAXI FUSES.