Power Valve System (Maxima): Notes

The power valve system is designed to improve engine torque and power production by increasing or decreasing intake manifold induction volume under different driving conditions. A limited induction volume is desirable at low or medium speed under heavy load. This will increase intake velocity and improve atomizing of fuel and combustion efficiency. An increased induction volume is desirable under heavy load and high speed condition.

Power valve system consists of power valve (built into intake manifold), diaphragm type power valve actuator, vacuum surge tank, power valve solenoid, one-way check valve and connecting vacuum hoses. See Figure.