Patent ID: 6178748
Filing Date: 2001-01-30
Classification: F02D,Y02T

Abstract:
Apparatus for compensating a control system for a turbocharger wastegate for an engine, said wastegate being biased to a normally-closed position, said control system including an air passage extending from an intake manifold of said engine to the wastegate, said air passage communicating pressurized air acting against said bias to open said valve, comprising a bleed passage having an effective flow area in venting relationship with said air passage to reduce the pressure therein, the bleed passage having an electronically-controlled valve therein which opens in response to a control signal thereto from an engine control module, the engine control module having a comparator and a memory therein including a predefined range of barometric pressure and being operatively associated with a barometric pressure sensor, said engine control module providing said control signal to the bleed valve upon the sensed barometric pressure being within the predefined range of barometric pressure.