New Generation N62 Engine
Chapter 3 P.7
Course Contents/Background Material
© BMW AG,
Service Training
As soon as the intake valve is opened, the pressurized intake air
flows into the cylinder, expands, and draws the air molecules
which follow into the cylinder. This means that suction waves
form in the intake pipe, which move at sonic speed (333 m/s) in
the opposite direction to the intake air. These suction waves are
reflected in the intake manifold and create pressure waves
which then move once more at sonic speed in the direction of
the intake valve.
Fig. 8: Movement of the intake air with the intake valve open
Index
Description
1
Pressure waves
2
Air manifold
3
Suction waves
KT-8408
