ENGINE FUEL DIAGNOSIS DEVICE AND CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION HAVING THE DEVICE

摘要

PPROBLEM TO BE SOLVED: To provide an engine fuel diagnosis device capable of diagnosing the use state of an unexpected fuel, and a control device for an automatic transmission capable of appropriately controlling the oil pressure of the automatic transmission even if unexpected fuel is used. PSOLUTION: In a control device 200, an estimated output of an engine 10 is computed based on an engine operation state on condition that expected fuel is used, input torque to the automatic transmission 30 is computed based on the estimated output, and oil pressure control to a brake 30B and a clutch 30C of the automatic transmission 30 is executed based on the input torque. The control device 200 computes the estimated acceleration during injection of a vehicle 100 which is provided during the execution of fuel injection in the vehicle 100 travelling on an uphill and downhill road based on the estimated output of the engine 10 and a grade of the uphill and downhill road. The use state of the unexpected fuel is diagnosed based on a value indicating the degree of the deviation of estimated acceleration during injection from the actual acceleration of the vehicle 100 when the estimated acceleration during injection is computed. PCOPYRIGHT: (C)2010,JPO&INPIT