Schematic Diagram Of Turbocharger System - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
B9O
EXHAUST MANIFOLD
INDUCTION
MANIFOLD
OIL RETURN
TO ENGINE
DENSITY CONTROLL
SEE NOTE 2
THRO TTLE
INCREASED ENGINE SPEED CAUSES
HIGHER PRESSURE AIR TO ACT AGAINST
THE SPRING AND VACUUM OPERATED
VARIABLE SETTING PRESSURE CON-
TROLLER. INCREASED PRESSURE
CAUSES POPPET VALVE TO OPEN
STARTING THE ACTUATOR DRAIN
FLOW.
THE BUILD UP OF OIL PRESSURE IN
THE ACTUATOR CAUSES THE PISTON
TO MOVE THE WASTE GATE TOWARD
THE CLOSED POSITION. AS THE WASTE
GATE CLOSES, MORE EXHAUST GASES
ARE DIVERTED INTO THE TURBINE.
CAUSING THE SHAFT TO INCREASE IN
SPEED. INCREASING THE COMPRESSOR
DISCHARGE PRESSURE.
NOTE 1
SPRING TENSION HOLDS WASTE GATE
OPEN. ENGINE OIL PRESSURE AGAINST
DIAPHRAGM CLOSES WASTE GATE. OIL
PRESSURE DECREASED OR INCREASED
BY PRESSURE CONTROLLER.
Figure 8-7. Schematic Diagram of Turbocharger System
Reissued: 9/23/80
POWER PLANT
215