Patent ID: 8117840
Filing Date: 2012-02-21
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A method of determining an abnormality of a turbo-supercharger that is provided in an internal combustion engine and has a variable member provided in an exhaust turbine, for changing an area of a nozzle thereof, comprising: a fuel supply stoppage step of stopping supply of fuel to the engine, when the engine is in a predetermined operating condition; a movable member-actuating step of forcibly actuating the movable member toward one of a substantially fully open side and a fully closed side, and then toward the other of the substantially fully open side and the fully closed side, during the stoppage of the fuel supply in said fuel supply stoppage step; a supercharging parameter-detecting step of detecting a supercharging parameter indicative of a degree of supercharging by the turbo-supercharger; and an abnormality-determining step of determining that the turbo-supercharger suffers from an abnormality of a response delay of the movable member when the detected supercharging parameter reaches a predetermined value after a lapse of a predetermined period, after an actuation of the movable member in said movable member-actuating step from one of the substantially fully open side or closed side to the other of the substantially fully open side or closed side.