LINK OF OPERATIONS
The Electrical control power steering (ECPS) uses a system called Hydraulic
Pressure Force Control, that allows to the steerability according to
the verchile speed.The power steering control unit adjust the hydraulic
pressure to reaction plunger by controlling the pressure solenoid valve
located in the steering box to optimize the steerability.
The Speed Sensing Power Steering (SSPS) providing appropriate steerability
to the driver according to the changes of verchile speed, this gives
steering stability.In other words,the steering wheel gets lighter by
adjusting steerability in stop or low speed and provides steering stability
by adjusting steering wheel to become heavier in high speed.
INPUT & OUTPUT OF (ECPS) CONTROL UNIT
Electronic Control Unit (ECU),equipped with 8 bit micro - processor,
first receives two inputs verchile speed,steering angular velocity.ECU
then determine the ammount of current that ECU will have to supply to
a pressure control valve.Pressure control valve in turn,control the
hydraulic pressure in the power rack cylinder by utilizing hydraulic
bypass mechanism like preventing (by leaking) smaal controlled amount
of fluid from entering either left or right of power rack cylinder.The
leaked fluid eventually returns to reservoir.Therefore,Electronic Control
Power Steering (ECPS) provides the drivers with the comfortable steering
effort for all driving condition.
