Patent ID: 6960153

Claim:
A clutch engagement control device which controls the engagement of a forward clutch and reverse clutch in an automatic transmission connected to an engine in a vehicle; the forward clutch being capable of transmitting a drive force of the engine for advancing the vehicle and the reverse clutch being capable of transmitting the drive force of the engine for reversing the vehicle; wherein operating ranges of the automatic transmission include a drive range which advances the vehicle, a reverse range which reverses the vehicle and a stopping range which stops the vehicle, the clutch engagement control device comprising: a selecting switch which selects the operating range of the automatic transmission; a position range of the selecting switch indicating the selected operating range of the automatic transmission; an inhibitor switch which outputs a range signal in accordance with the position range of the selecting switch, the range signal indicating the position range of the selecting switch; a manual valve which supplies oil pressure selectively to one of the forward clutch and the reverse clutch by changing position in accordance with the position range of the selecting switch; position ranges of the manual valve including a drive range in which only the forward clutch is engaged, a reverse range in which only the reverse clutch is engaged, and a stopping range in which both the forward clutch and reverse clutch are released; an oil pressure adjustment device which adjusts an oil pressure that is supplied to the manual valve; and a controller electrically coupled to the engine and the oil pressure adjustment device, the controller functioning to: determine whether an unmatching range condition occurs in which the range of the selecting switch indicated by the range signal and the range of the manual valve do not match, when the range of the selecting switch indicated by the range signal is the drive range or reverse range; and suppress an increase in engine rotation speed prior to engagement of the forward clutch or reverse clutch when the unmatching range condition occurs.