Technical data

Section 01 ENGINE

Subsection 02 (TOP END)

01-02-2

THEORY OF OPERATION

RAVE Valve System

On this engine, the RAVE valves are controlled by the Multi-Purpose Electronic Module (MPEM).

The MPEM measures 2 factors to control the RAVE valves: engine speed (RPM) and its rate of acceler-

ation.

To open the RAVE valves, the MPEM activates a solenoid which directs the positive pressure from engine

crankcase to the valves.

NOTE:

A check valve on the pressure line eliminates the negative pressure from the crankcase.

RAVE VALVE OPENED

1. Pulse from crankcase

2. Check valve

3. Positive pressure to solenoid

4. Solenoid activated

5. Positive crankcase pressure to RAVE valves

F06D16S