US 9,291,218 B2Granted

Vehicle control system

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsKensei Hata, Yuji Iwase, Yosuke Suzuki, Koichi Kato, Seitaro Nobuyasu, Taro Moteki

Life of this patent

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Abstract

A vehicle control system to prevent deterioration in controllability of the engagement device resulting from temporal deterioration of the engagement device. The vehicle control system is configured to switch a driving mode selectively between a first driving mode in which the engagement device is disengaged, and a second driving mode in which the engagement device is engaged. The vehicle control system comprises: an estimation means that estimates deterioration in an engagement property of the engagement device; and an engagement means that engages the engagement device after achieving synchronization between an input speed and an output speed, in case the estimation means estimates that the engagement property of the engagement device is deteriorated, and the driving mode is shifted from the first driving mode to the second driving mode.

Claims7

Dependent claims

A vehicle control system for a vehicle having an engagement device,

wherein the engagement device is adapted to govern a torque transmitting capacity between an engine and a driving wheel, and
wherein the vehicle control system is configured to switch a driving mode of the vehicle selectively between:
a first driving mode in which the engagement device is disengaged to disconnect a torque transmission between the engine and the driving wheel;
and a second driving mode in which the engagement device is engaged to transmit a torque between the engine and the driving wheel,
comprising:
a controller which is configured to estimate deterioration in an engagement property of the engagement device, and
to engage the engagement device after achieving synchronization between an input speed and an output speed of the engagement device, if the engagement property of the engagement device is deteriorated when the driving mode is shifted from the first driving mode to the second driving mode.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/482,170Filed 10 Sep 2014
Priority: JP 2013-18825311 Sep 2013
Published: US 2015/0073673 A112 Mar 2015
Granted: 22 Mar 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

F16D 48/06
External control of clutches: control by electric or electronic means, e.g. of fluid pressure
B60W 10/02
Conjoint control of vehicle sub-units of different type or different function: including control of driveline clutches
B60W 10/06
Including control of propulsion units: including control of combustion engines
B60W 10/08
Including control of propulsion units: including control of electric propulsion units, e.g. motors or generators