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Aircraft Maintenance
TroubleShoot > Aircraft
Turbocharger & Controller
Lycoming engine turbocharger controls can be divided into three systems:
(1). Variable pressure controller,
(2). Density controller in conjunction with a Differential pressure
controller, and,
(3). Density controller.
All three control systems regulate turbocharger output by adjusting
oil pressure to the exhaust bypass valve.
The Variable pressure controller senses induction system pressure.
The Density controller senses induction system pressure and temperature.
It regulates oil pressure only at wide-open throttle. The Differential
pressure controller senses deck pressure (before the throttle valve) and
air pressure after the throttle valve.
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