Electric Power Steering Control Unit, Basic Function - GF46.35-P-9890A
Model all (CAR)
Example illustration
Example illustration
Overview
This document contains information on:
- General
- Function
- Evaluation of input signals
- Output of signals
- Functional extensions on vehicles with highly automated
parking (HAP) or highly automated driving (HAD)
General
The electric power steering control unit is the central control unit for the steering functions.
Function
The electric power steering control unit engages in the following functions:
- Electronic Stability Program (ESP®)
- Active Park Assist
The electrical power steering control unit is attached to the rack-and-pinion steering together with the electric power steering actuator motor.
Evaluation of input signals
In order to carry out these functions, the electrical power steering control unit primarily processes the following input signals:
- Steer Assist torque request and wheel speeds.
- Engine status, drivetrain operational and engine speed.
- Steering wheel angle and steering wheel velocity.
- Current status and requested toothed rack position of parking system control unit.
Output of signals
The electric power steering control unit processes these input factors and primarily transmits the following actuations:
- Warning message in driver's display.
- Steering torque, steering wheel velocity and Steer Assist status to ESP® control unit.
- Electrical power steering control unit, status.
- Toothed rack position.
Functional extensions on vehicles with highly automated parking (HAP) or highly automated driving (HAD)
To retain the electric steering function if the main on-board electrical system fails, the electrical power steering control unit is also connected to the secondary on-board electrical system via circuit 30. In addition to connection via the secondary on-board electrical system, the electrical power steering control unit can, in the event of a fault, still communicate with the control units required for the steering function via a redundant signal path.
| Component descriptions | |||
| Electric power steering control unit, component description | Model 223 | GF46.35-P-7012A | |
| Model 243 | GF46.35-P-7012B | ||
| Model 206 | GF46.35-P-7012C | ||
| Model 297 | GF46.35-P-7012D | ||
| Model 295 | GF46.35-P-7012E |