Mazda Motor Corporation

Takahiro Kawamura

Daisuke Umetsu

Osamu Sunahara

Yasunori Takahara

Daisaku Ogawa

Chikako Ohisa

Takeatsu Ito

Yugou Sunagare

Takuo Hirano

Kunihiro Shishima

Taizo Ohmae

Keiichi Hiwatashi

The vehicle control device is designed to control a vehicle equipped with an engine, and an automatic transmission comprising a torque converter with a lockup clutch. The vehicle control device comprises a controller configured to perform control of changing an engagement degree of the lockup clutch and to, when such a condition that the vehicle is traveling and a steering angle-related value as a parameter related to a steering angle of a steering apparatus of the vehicle increases is satisfied, reduce an output torque of the engine to generate a deceleration of the vehicle to thereby execute a torque reduction control for controlling an attitude of the vehicle. The controller is configured to reduce the output torque of the engine, in accordance with the engagement degree of the lockup clutch controlled by a lockup control.

Vehicle control device

An engine control device is provided, that includes an air amount controller, an ignition timing controller, a basic target torque determinator which determines a basic target torque, a change rate acquirer for acquiring a change rate of a steering operation, a target additional deceleration setter for increasing a target additional deceleration while an increase rate thereof becomes less as the change rate increases, a torque reduction amount determinator for determining an engine torque reduction amount, a final target torque determinator for determining a final target torque, and an actual air amount estimator for estimating an actual air amount introduced into a combustion chamber. The air amount controller determines a target air amount and controls the intake air amount to achieve the target air amount. The ignition timing controller retards the ignition timing more as the actual air amount becomes more excessive with respect to the target amount.

Engine control device

An engine control device for controlling an engine based on a vehicle operating state is provided, that includes a basic target torque determinator for setting a vehicle target acceleration based on an accelerator pedal operation and determining a basic target engine torque based on the vehicle target acceleration, a torque reduction demand determinator for determining whether an engine torque reduction is demanded based on the vehicle operating state other than the accelerator pedal operation, a torque reduction amount determinator for determining an engine torque reduction amount according to the operating state when the torque reduction is demanded, a final target torque determinator for determining as a final target torque an engine torque calculated by subtracting the torque reduction amount from the basic target torque when the torque reduction is demanded, and an engine controller for controlling the engine so as to output the final target torque.

The engine control device comprises a basic target torque-deciding part for deciding a basic target torque based on a driving state of a vehicle, a torque reduction amount-deciding part for deciding a torque reduction amount based on a steering wheel operation state, an TCM for deciding a torque-down demand amount, based on a driving state of the vehicle other than the steering wheel operation state, and a final target torque-deciding part for deciding a final target torque, based on the decided basic target torque, the decided torque reduction amount and the decided torque-down demand amount, wherein the final target torque-deciding part is operable, when there is a torque-down demand, to restrict a change in the final target torque corresponding to a change in the torque reduction amount.

The turbocharged engine control device comprises a basic target torque-deciding part for deciding a basic target torque based on a driving state of a vehicle including an accelerator pedal operation state; a torque reduction amount-deciding part for deciding a torque reduction amount based on a driving state of the vehicle other than the accelerator pedal operation state; a final target torque-deciding part for deciding a final target torque based on the decided basic target torque and the decided torque reduction amount; and an engine output control part for controlling an intake air amount so as to realize a target air amount required for an engine to output the decided final target torque, wherein the engine output control part is operable, when an operating state of the engine falls within a supercharging region, to restrict a reduction in the intake air amount corresponding to a change in the torque reduction amount.

Turbocharged engine control device

The turbocharged engine control device comprises a basic target torque-deciding part for deciding a basic target torque based on a driving state of a vehicle including an accelerator pedal operation state; a torque reduction amount-deciding part for deciding a torque reduction amount based on a driving state of the vehicle other than the accelerator pedal operation state; a final target torque-deciding part for deciding a final target torque based on the decided basic target torque and the decided torque reduction amount; and an engine output control part for controlling the engine so as to cause the engine to output the decided final target torque, wherein the engine output control part is operable, when an operating state of the engine falls within a supercharging region where supercharging by a compressor, to restrict control of the engine corresponding to a change in the torque reduction amount.

A PCM comprises a basic target torque-deciding part for deciding a basic target torque, based on a driving state of a vehicle including an accelerator pedal operation state, a torque reduction amount-deciding part for deciding a torque reduction amount, based on a driving state of the vehicle other than the accelerator pedal operation state, a final target torque-deciding part for deciding a final target torque, based on the decided basic target torque and the decided torque reduction amount, and an engine output control part for controlling an engine to cause the engine to output the decided final target torque, wherein the engine output control part is operable to prohibit switching of an operation mode of the engine from being performed simultaneously with control of the engine according to a change in the final target torque corresponding to a change in the torque reduction amount.

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Hiroshima, Japan

Takahiro Kawamura