Accord LX Sedan L4-2156cc 2.2L SOHC MFI (1997)
3. The fluid volume that flows thorough oil passage A and the pressure difference applied to the sub-valve increase in proportion to the engine speed.
The sub-valve lowers overcoming the spring force, and it starts to close the variable orifice to regulate the discharge volume. Therefore, the fluid
volume flowing to the steering gearbox decreases as the engine speed increases. At the same time, the flow control valve continues to control the
fluid volume to the return port.
4. As the engine speed increases further, the pressure difference at the sub-valve increases further, too. The sub-valve then closes the variable orifice
completely, regulating the discharge volume further. Therefore, the fluid volume discharged from the pump to the steering gearbox is regulated
and maintained at a given level until the engine speed reaches the high speed range. The flow control valve functions continues to control the fluid
volume to the return port.
PRESSURE RELIEF
Pressure at the discharge side of the fixed orifice is directed to the bottom of the flow control valve. When the pressure builds up, the relief valve in
the flow control valve opens to release the pressure at the bottom of the valve. This allows the flow control valve to be pushed back by the pressure
difference, and the fluid volume to the pump return port increases. As explained above, the system keeps the pump discharge pressure (relief pressure)
