Coil Integrated Module
The main component of the coil integrated module is the microprocessoL
The most important information received by the microprocessor is the signals from the four, wheel speed sensors, which are processed in a special unit (integrated circuit) for the requirements of the microprocessoL
The input information is then converted to:
- Acceleration velocity.
- Deceleration velocity.
- Amount of slippage.
The integral electronic coils activate the isolation and dump valves in the hydraulic control unit.
The logic function installed in the microprocessor decides which actuators (solenoid valves and pump motor) should be activated.
In addition, each time the vehicle has the ignition turned to ON, a function test is carried out on the wheel speed sensors and actuators.
In case of a malfunction, the system switches off and a trouble code is set, providing information about the cause. As mentioned above, the function of the conventional brake system remains unaffected. Any cutout of the ABS is displayed by illumination of the control indicator. The microprocessor has a memory which retains its contents even after the battery has been disconnected. The stored trouble codes can be read out with TECH 1.
The control units tasks can be summarized as follows:
- Measurement and filtering of wheel speeds.
- Calculation of reference speeds.
- Calculation of slippage and wheel deceleration.
- Determination of nominal values for current regulation.
- Monitoring of inputs and outputs.
- Performance of function check.
- Display and storage of trouble codes.
- Illumination of control indicator.
- Output of stored faults (self-diagnosis).