Patent ID: 6318085
Filing Date: 2001-11-20
Classification: F02B,F02D,Y02T

Abstract:
An apparatus for controlling a coasting air recirculation valve of a turbocharger of an internal combustion engine, the coasting air recirculation valve being arranged in a coasting air recirculation line of the internal combustion engine, the coasting air recirculation line bypassing a compressor which is disposed in an intake duct, the apparatus comprising:a negative pressure vessel arrangement; andan electrically controllable solenoid valve delivering, as a function of a control signal, a particular pressure to the coasting air recirculation valve in order to open the coasting air recirculation valve, at least two sources of the particular pressure being available, the particular pressure being one of an intake duct pressure applied on a downstream side of a throttle valve and a control pressure from the negative pressure vessel arrangement, the control pressure being independent of the intake duct pressure.