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US 9,435,423 B2Granted
Oil supply device
AssigneeHitachi Automotive Systems, Ltd.
InventorShogo Miyamoto
Life of this patent
Estimating the term…
Abstract
The present invention relates to an oil supply device for use in an automatic transmission mounted on a vehicle, and is applied to a vehicle in which an idle reduction control or the like is performed. The oil supply device includes an oil pump which is driven by a driving motor of a vehicle and a motor separate from the driving motor, and an engagement and disengagement element which transmits a driving force of the driving motor to the oil pump, and the oil pump is driven by the motor without using a drive system of the driving motor.
Claims20
An oil supply device, comprising:
- an oil pump which is driven by a driving motor of a vehicle and a motor separate from the driving motor;
- and
- a first clutch which transmits and interrupts a driving force of the driving motor to the oil pump,
- wherein the oil pump is selectively driven by one or both of the driving motor and the motor, the motor drives the oil pump without using a drive system of the driving motor, and the motor assists a driving force of the oil pump generated by the driving motor when the driving motor is rotated at a low speed, and
- wherein an OFF failure diagnosis of the first clutch is performed by confirming an oil pressure reaching a specific oil pressure in a state in which assist of the motor is not performed after the driving motor starts.
2 more elements
Dependencies are inferred from the claim text.