US 2015/0274172 A1Published application

Vehicle control system

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsSatoshi Yamanaka, Takahiro Yokokawa, Yoshio Ito

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Abstract

A vehicle control system configured to carry out an energy saving control is provided. The vehicle control system is applied to a vehicle having an engine, a torque converter, a transmission and a clutch device selectively connecting a turbine runner to the transmission. The vehicle control system executes the energy saving control by controlling both an operating condition of the engine and an engagement condition of the clutch device or only the engagement condition of the clutch device. The vehicle control system comprises a clutch control means configured to increase the torque transmitting capacity of the clutch device using an increasing amount of a speed of the turbine runner as a target value, when bringing the clutch device into engagement being in disengagement during execution of the energy saving control.

Claims5

Dependent claims

A vehicle control system that is applied to a vehicle having

an engine,
a torque converter having a pump impeller to which torque of the engine is delivered, and a turbine runner from which the torque is outputted,
a transmission that transmits the torque delivered from the turbine runner to drive wheels, and
a clutch device that is disposed between the turbine runner and the transmission to selectively connect the torque converter to the transmission while changing a torque transmitting capacity thereof, and
that is configured to execute an energy saving control for reducing energy consumption of the vehicle by automatically controlling an operating condition of the engine and an engagement condition of the clutch device to stop the engine during running while bringing the clutch device into disengagement,
comprising:
a control unit that is configured to increase a speed of the turbine runner using an increasing amount thereof as a target value when restarting the engine while bringing the clutch device into engagement, being in disengagement during execution of the energy saving control, and to complete the engagement of the clutch device after a completion of an increment of the speed of the turbine runner.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/438,355Filed 30 Oct 2012
Published: 1 Oct 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification24 codes

B60W 30/192
Propelling the vehicle: mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
B60W 10/02
Conjoint control of vehicle sub-units of different type or different function: including control of driveline clutches
B60W 10/026
Including control of torque converters: of lock-up clutches
B60W 10/06
Including control of propulsion units: including control of combustion engines