Accord L4-2156cc 2.2L SOHC (1991)
With the engine running at idle in a parked car, fluid flow through the sensor rotors is blocked because the rotors are not turning. Therefore the gain
control valve moves left. On the gain control valve, the orifice resistance is high on pump side, while it is low on the reservoir side, with the result that
pressure in the reaction chamber is lowered and steering wheel operation with easily.
Power Steering Speed Sensor
As the car is driven, the rotors start turning and the fluid returns to the reservoir, reducing the fluid pressure at the gain control valve. Therefore, the gain
control valve moves right, the orifice resistance on the pump and reservoir sides is appropriately balanced, with the result that the reaction chamber is in
the medium range and the steering resistance is moderate.
Power Steering Speed Sensor
When the car is moving at high speed, the sensor reduces the pressure further and the gain control valve moves right. The orifice pressure on the pump
side is low and the pressure on the reservoir side is high, the fluid pressure in the reaction chamber is also high giving the steering wheel less assist.
