SPS Function at 0-62 MPH, Left Turn

SPS Function at 0-62 MPH, Left Turn

SPS Operation Speeds 0 To 62 MPH Left Turn (Part 1 Of 2):

SPS Operation Speeds 0 To 62 MPH Left Turn (Part 2 Of 2):

NOTE:
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For left steer angle the non-return valve (4n) is depressurized and the inflowing oil above the reaction piston (4l) can flow back to the reservoir.

The non-return valve (4m) is now pressurized and closed.

As the vehicle speed increases the Speed-sensitive Power Steering (SPS) P-valve (Y10) is increasingly de-energized. As a result more pressure oil is led on both sides of the reaction piston (4l) via the restrictors (8a, 8b), with the one-sided pressurizing on the reaction piston (4l) increasing further. The force on the rotary slide is consequently increased and the driver has to turn the steering wheel with a higher steering torque.