Self-Study Programme 195 The 2.3 ltr V5 Engine - Volkspage

In the V5 engine, the rotary valve turns to theperformance position at an engine speed of4300 rpm. This opens up the path to theperformance port. The performance port isdesigned so that the intake and pressure wavesfollow a shorter path to the inlet port.The performance port is filled with air when theinlet ports are closed.Performance portis filled.Rotary valve195_015When the inlet port opens, an intake wavepropagates uniformly inside the intake manifold.The intake wave reaches the pipe end in theperformance port before it does in the torqueport. There it is reflected and returns to the inletport.195_016Reflection point of performance portReflection pointof torque portUnlike the pressure wave which propagates backfrom the torque port, the intake wave arrivesbefore the inlet port closes. It therefore has aself-charging effect.195_017The wave arriving too late from the torque port isreflected by the closed injectors and fills theperformance port.195_01923