Steering Control System (Crosscabriolet): Overview Nissan Murano Z51 рестайлинг 2

Component Description

OPERATION PRINCIPLE

During Parking (When Turning The Steering Wheel To The Right.)

Scheme 11

1. Power steering solenoid valve is closed while a vehicle is stopped.
2. Pinion "1R", "2R" and "3R" are closed depending on steering torque of steering wheel.
3. Oil pressure "P" in the gear housing assembly is the sum of oil pressures occurred in "2R" and "3R". This results in a light steering force because of high pressure.

During High-speed Operation

Scheme 12

1. Power steering solenoid valve is opened during high-speed operation.
2. Pinion "1R", "2R" and "3R" are closed depending on steering torque of steering wheel.
3. Oil pressure "2R" does not occur because the power steering solenoid valve is on full throttle.
4. Oil pressure "P" in the gear housing assembly includes only oil pressure occurred in "3R" and results in a heavy steering force.

Scheme 13

1. EPS system enters the fail-safe mode (that allows the steering force to be controlled without impairing the driveability) if any of the input/output values to/from EPS system (power steering control unit) deviate from the standard range. NOTE: The system enters the fail-safe mode if the engine speed remains at 1, 500 RPM or more for over 10 seconds while the vehicle is stopped. This is normal.
2. The fail-safe function is canceled when a vehicle speed signal of 2 km/h (1.2 MPH) or more is inputted or the ignition switch is turned OFF-->ON. EPS system restores the normal operation at that time.

Scheme 14

Description

Power supply to EPS system

ECM sends engine speed signal to power steering control unit.

Combination meter sends vehicle speed signal to power steering control unit.

1. Hard steering when fully turning the steering wheel.
2. Light steering when driving at a high speed.