EPHS â Electrically Powered Hydraulic Steering - VolksPage.Net

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Design and Function TRW The capacitive sensor A rotor mounted on the input shaft, rotates between nine small plate-type capacitors. This distorts the capacitance of the plate-type capacitors. The sensor electronics calculates the signals (steering angle and steering angle rate) for the power steering control unit from this change in capacitance. Basic diagram of distortion of capacitance Rotor Sensor electronics Capacitor electrodes 259_014 Plan view Input shaft with rotor Rotor Power steering control unit Capacitor electrodes 259_015 14 Sensor electronics
KOYO The power steering sensor G250 Task The power steering sensor G250 is installed at the top of the input shaft of the steering gear. It determines the steering wheel angles and calculates the steering angle rate. It is not an absolute angle sensor (steering wheel angle in proportion to steering wheel turns)! Analysis of signal The signal is required in the power steering control unit in order to detect the movements of the steering. The larger the steering angle rate, the greater is the pump speed and thus the volume flow (ignoring vehicle speed). 259_027 Substitute function If the sensor fails, the power steering switches into a programmed emergency running mode. The steering function remains assured, although greater steering forces are required. Self-diagnosis 30 15 30 15 The sensor is integrated in the self-diagnosis. CAN L CAN L The power steering control unit stores any malfunctions of the sensor. CAN H S CAN H In function 02 - Interrogating fault memory - it is possible to detect J500 CAN CAN 15 + M + 31 + 5 - – short circuit to earth – open circuit/short circuit to positive – faults. G250 Electric circuit 31 31 259_029 G250 J500 Power steering sensor Power steering control unit 15
Page 1 and 2: Service. Self-Study Programme 259 E
Page 3 and 4: At a Glance Introduction . . . . .
Page 5 and 6: The steering system fitted to Volks
Page 7 and 8: The steering angle sender G85 The s
Page 9 and 10: Advantages of the EPHS - Electrical
Page 11 and 12: The engine pump assembly The engine
Page 13: TRW The power steering sensor G250
Page 17 and 18: The steering angle sender G85 Task
Page 19 and 20: to left working cylinder to right w
Page 21 and 22: Service Inspecting hydraulic fluid
Page 23 and 24: Service Recognition features of the
Page 25 and 26: 6. If a crash occurs, how is it pos
Page 27 and 28: Notes Answers to „Test Your Knowl

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EPHS â Electrically Powered Hydraulic Steering - VolksPage.Net