Electric Egr Transducer - Mitsubishi Eclipse Technical Information Manual

ELECTRIC EGR TRANSDUCER

The Electronic EGR Transducer (EET) contains an
electrically operated solenoid and a back-pressure
controlled vacuum transducer. The PCM operates
the solenoid based on inputs from the multi-port
fuel injection system. The EET and EGR valve are
serviced as an assembly.
When the PCM de-energizes the solenoid, vacuum
does not reach the transducer. Vacuum flows to
the transducer when the PCM energizes the sole-
noid.
When exhaust system back-pressure becomes high
enough, it fully closes a bleed valve in the vacuum
transducer. When the PCM energizes the solenoid
ENGINE <NON-TURBO> - Control System
and back-pressure closes the transducer bleed
valve, vacuum flows through the transducer to oper-
ate the EGR valve.
Energizing the solenoid, but not fully closing the
transducer bleed hole (because of low back-pres-
sure), varies the strength of the vacuum signal ap-
plied to the EGR valve. Varying the strength of the
vacuum signal changes the amount of EGR supplied
to the engine. This provides the correct amount
of exhaust gas recirculation for different operating
conditions.
The EET and EGR valve mount to the rear of the
cylinder head.