571The pressure supply system

This consists of an internal gear crescent oil pump driven by the engine via a shaft splined to the torque converter impeller. The oil pressure generated by the oil pump is directed to the pressure regulating valve. By introducing limited throttle pressure into the regulator valve spring chamber, the thrust acting on the left hand end of the valve is increased during acceleration. This prevents the regulator valve being pushed back and spilling oil into the intake side of the oil pump. As a result, the line pressure will rise as the engine speed increases.

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