Protege LX L4-1489cc 1.5L DOHC MFI (1998)
This makes drainage of line pressure (7) from chamber (C) difficult. Therefore, the pressure regulator valve balances at a high level line pressure (7).
In R position, line pressure (6) is applied to the pressure regulator valve, moving the valve to the right. This makes drainage of line pressure (7) in
chamber (C) difficult. Therefore, the pressure regulator valve balances at a considerably high level line pressure (7).
Pressure Modifier Valve
Outline
The pressure modifier valve converts solenoid reducing pressure to modifier pressure that matches the throttle valve opening angle(engine load).
Operation
The solenoid reducing pressure generated by the solenoid reducing valve is constantly applied to the step in the right side of the pressure modifier
valve.
When the throttle valve opening angle is small, the duty value of the pressure control solenoid is low.
The hydraulic pressure applied to the left side of the pressure modifier valve drops due to the pressure control solenoid action, moving the modifier
valve to the left the resulting modifier pressure is low.
When the throttle valve opening angle is large, the duty value of, the pressure control solenoid is high.
The hydraulic pressure applied to the left side of the pressure modifier valve is not easily drained by the pressure control solenoid, moving the
pressure modifier valve to the right. The resulting modifier pressure is high.
Through this process, modifier pressure is controlled, depending on the throttle valve opening angle.
Pressure Modifier Accumulator
Outline
This valve stabilizes the modifier pressure adjusted by the pressure modifier valve to prevent modifier pressure pulsation.