Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Mitsuba Corporation

Tomohiro Chimbe

Keisuke Ota

Norihiro Tsukamoto

Tomohiro Asami

Daiki Fukuda

Yuji Kajiyama

Ayumu Sagawa

Hiromasa Takai

Masahiro Fueki

Shinji Shibuya

Kazuki Imanishi

Yoshio Hasegawa

Nobufusa Kobayashi

Shingo Eto

Seiji Masunaga

Takashi Miura

Masaki Ishizeki

Guodong Tan

Miya Yamada

Shingo Akita

Takuma Sugino

Masataka Hirano

Shogo Kawai

Kenji Kamio

Masahiro Ishijima

Taiki Ishida

An electric oil pump for automobile transmission clutch engagement includes: a temperature sensor that measures a temperature of oil supplied to an oil supply destination relating to clutch engagement of an automobile transmission; an oil pump drive motor; a current determination part that determines a current value output to the oil pump drive motor to a predetermined current value determined such that the oil pump drive motor is capable of being driven without stopping in a case where the temperature is equal to or less than a predetermined temperature at which a torque of the oil pump drive motor becomes smaller than a load of the oil pump drive motor; and an oil pump that supplies oil to the oil supply destination by the oil pump drive motor being driven based on the determined current value.

Electric oil pump for automobile transmission clutch engagement, electric oil pump control method for automobile transmission clutch engagement, vehicle, and vehicle electric oil pump for automobile transmission clutch engagement

A control device of a vehicle, the vehicle includes an engine, a hydraulic clutch disposed on a power transmission path between the engine and driving wheels, a starter motor for use in startup of the engine, an electric oil pump device discharging hydraulic oil generating oil pressure supplied to the clutch, and a power supply device supplying electric power driving each of the starter motor and the electric oil pump device. The control device includes a startup control unit that performs starter startup control of starting discharge of the hydraulic oil by the electric oil pump device after determining that output voltage of the power supply device or input voltage of the electric oil pump device is higher than or equal to a fixed voltage after completion of cranking by the starter motor upon startup of the engine using the starter motor.

Control device of vehicle

In a case where a predetermined switching operation to a state in which a traveling position is selected from a state in which another shift position of a mechanical transmission device is selected is performed by a driver, a quick engagement command to quickly engage a predetermined engagement device is performed in a state in which output of a predetermined torque is stopped, and then a rapid garage control of increasing a rotation speed of an electric motor at a rotation speed equal to or higher than a predetermined rotation speed is executed. The rapid garage control is executed in a case where a predetermined start condition is established.

A control device executes, when a jump-down shifting is executed, shifting control in which, after engaging elements establishing a pre-shifting gear position are released, an intermediate gear position that is a gear position between the pre-shifting gear position and a post-shifting gear position is established, and after the intermediate gear position is established, the post-shifting gear position is established. When an engaging element able to reduce a rotation speed difference between two rotating bodies connected by engaging elements establishing the intermediate gear position is regarded as a speed difference reducing element, the control device executes a pre-engaging process for generating a torque capacity in the speed difference reducing element while the shifting control is being executed and before establishing the intermediate gear position.

Control device for automatic transmission

When starting a skip downshift, a controller for an automatic transmission disengages two or more engagement elements that are in an engaged state. The disengaging two or more engagement elements includes setting a first engagement element, which is one of the two or more engagement elements that are disengaged and is used to form an intermediate gear stage having a lower transmission ratio than a post-shifting gear stage, to an engagement preparation state that maintains a state immediately before the engaged state. Subsequently, the controller engages a second engagement element, which is used to form both the intermediate gear stage and the post-shifting gear stage, and temporarily increases engagement pressure of the first engagement element. The controller disengages the first engagement element and engages a third engagement element, which is used to form the post-shifting gear stage, to form the post-shifting gear stage.

Controller for automatic transmission and method for controlling automatic transmission

An electronic control unit is configured to control a hydraulic pressures of engaging element and disengaging element in accordance with a preset target output shaft torque during a power-on downshift. The electronic control unit is configured to delay a start of decrease in the hydraulic pressure of the disengaging element from a start of a torque phase while maintain the hydraulic pressure of the disengaging element at the start of the torque phase. The electronic control unit is configured to start decreasing the hydraulic pressure of the disengaging element when the electronic control unit determines that overspeed of an input shaft is occurring during the torque phase and a predetermined condition is established.

Control device for vehicle, and control method for vehicle

An electronic control unit is configured to set a target torque phase time which is used in torque phase control based on an output shaft torque difference. The electronic control unit sets the target torque phase time to be longer when the output shaft torque difference is large than when the output shaft torque difference is small. Accordingly, since the target torque phase time can be appropriately set, it is possible to achieve both of preventing a sudden change in driving force and torsion vibration of an output shaft and preventing a decrease in drivability due to hesitation at the same time. Sudden change in driving force and torsion vibration of the output shaft occur when the difference in driving force between before and after a gear shift is large. Hesitation occurs when the difference in driving force between before and after the gear shift is small.

Control device for vehicle and control method for vehicle

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.

Vehicle control device

A control device of a vehicle including a multi-speed transmission having plurality of gear positions different in gear ratio selectively established by controlling engagement and release predetermined engagement devices out of plurality engagement devices, the control device involves: shift control portion configured to provide delay control of delaying time point starting provision of release-side torque phase control reducing a torque capacity of release-side engagement device by a preset delay time with respect to time point of starting provision of a torque phase control of generating a torque capacity of an engagement-side engagement device during a torque phase in a drive upshift; and a delay time setting portion configured to preset the delay time such that the delay time is shortened when a shared torque of the release-side engagement device before start of the torque phase in the drive upshift is high, as compared to when the shared torque is low.

When there is a request for a skip downshift that transitionally establishes an intermediate speed position, a surge hydraulic pressure at the start of a torque phase during shift control toward the intermediate speed position is set so as to be lower than a surge hydraulic pressure at the start of a torque phase during shift control toward a required speed position.

Controller for automatic transmission

When an inertia phase has started while torque phase control is being executed, the torque phase control is ended, a target torque capacity of an engaging element in inertia phase control is corrected on the basis of a difference between the target torque capacity of the engaging element at the time when the inertia phase has started and the target torque capacity of the engaging element at the time when the torque phase control has completed (or a difference between the target torque capacity of the engaging element at the time when the inertia phase has started and the target torque capacity of the engaging element, which is set at the time when the inertia phase control has started), and the inertia phase control is started.

Growing community of inventors

Kariya, Japan

Tomohiro Chimbe