Example illustration of rack-and-pinion steering |
1 | Electric power steering torque sensor |
2 | Electric power steering actuator motor |
3 | Electrical power steering control unit |
4 | Rack-and-pinion steering gear |
5 | Worm gear |
P46.20-2476-76
Overview
This document contains information on:
General
Function
General
The rack-and-pinion steering is used to transfer the steering torque in its role as steering gear.
Function
The rack-and-pinion steering is located in front of the front axle and mounted on the integral carrier.
The transmission input shaft of the rack-and-pinion steering is connected to the diagonally-toothed drive pinion via a torsion bar. The pinion engages in the gear rack toothing. The tie rods are connected with both ends of the toothed rack via ball joints. The rack-and-pinion steering is protected from contamination by seal bellows.
With the Direct-Steer system, the rack-and-pinion steering has a variable gear ratio. In other words , the tooth split becomes greater in the range 6° to 90° steering angle from the center position.
The drive pinion and the toothed rack convert the steering torque applied by the driver into axial force. The toothed rack, tie rods and tie rod ends transmit the axial force to the steering knuckles of the front wheels.
Toothed rack pinion with Direct-Steer system |
6 | Toothed rack |
7 | Drive pinion |
P46.20-A005-80