A vehicle drive device includes a control portion that is allowed to execute a control mode that controls multiple hydraulic elements to cause a vehicle in a stop state of an engine to start moving. The control mode starts controlling part of the multiple hydraulic elements before the engine is started, by using oil pressure accumulated in an accumulator (S8). The control mode starts controlling the rest of the multiple hydraulic elements by using oil pressure that is provided after the engine is started (S16).

A vehicle control device in a vehicle including an engine and a multi-speed transmission having a plurality of gear positions, each gear position out of the plurality of gear positions established by engaging predetermined engagement devices out of a plurality of engagement devices, the vehicle control device including a shift control portion configured to control release of a release-side engagement device of the plurality of engagement devices and engagement of an engagement-side engagement device of the plurality of engagement devices so as to switch the gear position established in the multi-speed transmission, and an engine control portion configured to provide idling-reduction control of temporarily stopping the operation of the engine based on a predetermined engine stop condition.

Provided is a control device for a vehicle including a first oil pump that is driven by a first drive source driving a drive wheel of a vehicle and configured to supply oil to a hydraulic pressure actuation machine, and a second oil pump that is driven by a second drive source different from the first drive source and configured to supply oil to the hydraulic pressure actuation machine. The control device drives the second oil pump when a start switch of the vehicle is turned on and the first drive source is started for the first time, and drives the second oil pump when the second oil pump is not driven for a first predetermined time after the first drive source is started, and a rotation speed of the second oil pump when the first drive source is started is lower than a rotation speed of the second oil pump after the first drive source is started.

Provided is a control device for a vehicle including a first oil pump that is driven by a first drive source driving a drive wheel of a vehicle and configured to supply oil to a hydraulic pressure actuation machine, and a second oil pump that is driven by a second drive source different from the first drive source and configured to supply oil to the hydraulic pressure actuation machine. The control device drives the second oil pump when a start switch of the vehicle is turned on and the first drive source is started for the first time, and drives the second oil pump when the second oil pump is not driven for a first predetermined time after the first drive source is started, and a rotation speed of the second oil pump when the first drive source is started is lower than a rotation speed of the second oil pump after the first drive source is started.

While a vehicle is coasting with an engine being automatically stopped and a power transmission path between the engine and wheels being disengaged, when a deceleration request is made and the engine is restarted with the power transmission path being engaged, a deceleration level increases relative to the deceleration level required by a driver or the vehicle, thereby lowering drivability. A vehicle control apparatus includes a deceleration level control unit that controls the deceleration level of the vehicle such that, during travelling of the vehicle continuing to travel with a power transmission mechanism between the engine and the wheels being disengaged, when the deceleration request is made and the engine is started by an engagement of the power transmission mechanism, the deceleration level becomes a target deceleration level calculated from a first target deceleration level generated after the engagement of the power transmission mechanism is complete and a second target deceleration level generated in response to the deceleration request.

A vehicle includes a hydraulic control unit (HCU) having a set of electrically-actuated valves configured to open/close to accumulate a pressurized hydraulic fluid in a hydraulic apply circuit of a first clutch of a transmission; a hydraulic fluid pump mechanically driven by an engine and configured to provide the pressurized hydraulic fluid to the HCU; and a controller configured to: prior to temporarily stopping the engine, control the engine and the HCU such that the pressurized hydraulic fluid accumulates in the hydraulic apply circuit of the first clutch to a desired hydraulic fluid pressure, and upon restarting the engine, control the set of electrically-actuated valves of the HCU to provide the pressurized hydraulic fluid from the hydraulic apply circuit first clutch to a hydraulic apply circuit for a second clutch of the transmission to apply the second clutch and shift the transmission into drive.

A method for detecting an oil leakage of a main pump during a stopping process of an internal combustion engine, where the oil leakage is caused by a reversal of a direction of rotation of a crankshaft of a vehicle including an electric auxiliary pump and the main pump, where the main pump is driven by the internal combustion engine of the vehicle. The method includes determining whether a rotational speed of the electric auxiliary pump exceeds a predefined threshold value, and when the rotational speed of the electric auxiliary pump exceeds the predefined threshold value for the rotational speed, detecting that the main pump is leaking, recording an error in an error memory of the vehicle, and demanding an engine start.

In a transmission device having a hydraulic control device that releases working oil accumulated in an accumulator and supplies the working oil to a hydraulic servo for starting an engine, the automatic stopping of the engine is permitted when an accumulator internal pressure becomes equal to more than a stopping permission threshold. The stopping permission threshold is changed with a correction value according to a state of the vehicle. Thus, it is possible to optimize the accumulator internal pressure that permits automatic stopping of the engine, to ensure the accumulator internal pressure necessary for starting the engine and the vehicle again and achieve prompt automatic stopping of the engine.

A drive control system of a vehicle includes a vehicle speed module configured to determine whether the vehicle is moving and set a state of a signal based on the determination. A shift control module is configured to shift a transmission of the vehicle based on a signal from a range selector. Independently of the signal from the range selector, the shift control module is configured to selectively shift the transmission of the vehicle based on a signal from a combination park and ignition switch and the signal from the vehicle speed module. An ignition control module is configured to selectively shut down an engine of the vehicle based on the signal from the combination park and ignition switch and the signal from the vehicle speed module.

A hydraulic control system of an automatic transmission for a vehicle provided with an idle stop and go (ISG) system includes a mechanical hydraulic pump driven by a torque of an engine, the mechanical hydraulic pump pumping a fluid stored in an oil pan, a regulator valve, a manual valve, a linear solenoid valve for controlling the hydraulic pressure supplied from the manual valve through the second hydraulic line and for supplying the controlled hydraulic pressure to a third hydraulic line, a switch valve, and an electric hydraulic pump driven by electric energy for pumping the fluid stored in the oil pan through a fifth hydraulic line and for feeding the pumped fluid to a sixth hydraulic line connected to the fourth hydraulic line.