Beretta V6-3100 3.1L MFI VIN M (1994)
ground. When a solenoid is energized, the armature, with attached shaft and swivel pintle, is lifted and the orifice is opened. Three solenoid valves
control exhaust gas flow from the exhaust to the intake manifold through three orifices, to produce seven combinations of EGR flow. The valves
should only open when the engine is at operating temperature, above idle speed and a vehicle speed present.
The PCM uses the information from the the following sensors to control the flow:
1. Coolant temperature (CTS)
2. Throttle Position Sensor (TPS)
3. Mass Air Flow (MAF) or Manifold Absolute Pressure (MAP)
CONSTRUCTION
The pintles that close the EGR orifices are attached to the solenoid shafts with swivels. The swivel pintle feature insures good sealing of the
exhaust gas flow, reducing the need for critical assembly alignment. The effects of EGR leakage on idle quality are reduced because the shaft and
seals are exposed to the exhaust pressure instead of manifold vacuum. The shafts are sealed from the exhaust chamber by floating seals held in
place by the seal spring. These springs also hold the upper seals of the armature cavity in the solenoids. The solenoid coils are fastened together to
maximize reliability and to seal the coils from the environment. The coils use a common power terminal with individual ground terminals.
