Short Runner Valve (SRV)

The intake manifold features a dual shaft SRV system to maximize both low end torque and peak power. The SRV system operates under Wide Open Throttle (WOT) conditions to maximize engine performance. When activated by the PCM, the SRV actuates a mechanical linkage to redirect the intake air flow to eight short runners. The PCM looks for a signal feedback when the actuator is activated. The SRV is bolted to the front of the intake manifold and can be service separately from the manifold. The engine performance and power output is enhanced through the use of the SRV system. The SRV system allows the intake charge air to bypass the long intake manifold runners between the intake manifold plenum and the intake manifold interface to the cylinder heads by providing a shorter runner directly between the plenum and the cylinder head interface The SRV position is controlled by a pneumatic/spring actuator and electronic solenoid valve. When the solenoid is not energized (rest position), the SRV is held in the closed position. When the solenoid is energized the SRV is moved and held in its opened position. There is a set of enable conditions including a minimum engine coolant and ambient temperature, SRV enable and powertrain coordinator load enable condition. If any of these conditions are not met, then the SRV valve is de-energized (closed).