Patent ID: 7179199
Filing Date: 2007-02-20
Classification: B60W,F02D,F16H,Y10S,Y10T

Abstract:
1. A control system for a vehicle having an engine with a plurality of cylinders whose operating condition is switchable between an all-cylinder operating condition where all of said cylinders are operated and a partial-cylinder operating condition where a part of said cylinders is operated according to an operating condition of said vehicle, a torque converter with a lockup clutch connected to said engine, and a lockup clutch control device for controlling said lockup clutch, said control system comprising: engine switch control means for switching the operating condition of said engine between said all-cylinder operating condition and said partial-cylinder operating condition; failure determining means for determining a failure of said lockup clutch and said lockup clutch control device; and failure determination suspending means for suspending the failure determination by said failure determining means in the case that the operating condition of said engine is switched by said engine switch control means during the failure determination by said failure determining means.