Toyota Jidosha Kabushiki Kaisha

Other

Aisin Seiki Kabushiki Kaisha

Advics Co., Ltd.

Yasushi Kobayashi

Toshihisa Nihei

Toshihisa Kato

Minao Yanase

Yoshihisa Yamada

Gen Inoue

Hiroshi Ueno

Noritaka Yamada

Mikao Nakajima

Yuji Yoshii

Masaki Banno

Yasuhiro Abe

Hiroto Horie

Hiroyuki Matsubayashi

Shinji Tsugawa

Hiroshi Omine

Koichi Kondo

Tatsushi Takasu

Takashi Nonaka

Daisuke Kohara

Jun Mizuno

Kota Shimoga

Yukihisa Miwa

Masaaki Komazawa

The vehicle control apparatus is provided with a vehicle body speed deriving portion that derives a vehicle body speed of a vehicle, a wheel speed difference deriving portion that derives a wheel speed difference which is a deviation between the maximum wheel speed and the minimum wheel speed of the wheels of the vehicle, a request drive amount deriving portion that derives a request drive amount for the drive source of the vehicle, a torque suppressing device that suppresses torque of a driving wheel, a traction control portion that controls the torque suppressing device and suppresses an acceleration slip of the driving wheel based on the wheel speed difference or a combination of the wheel speed difference and at least one of the vehicle body speed and the request drive amount.

Vehicle control apparatus

A control state of the vehicle is switched upon operation of a control switch. Besides, a mode of travel for a travel of a vehicle is selected by operation of a travel mode selection portion. Then, it is determined whether the recommended control state recommended for the selected mode of travel and the actual control state are the same. If it is determined that they are not the same, that is, that there is a deviation between the recommended control state and the actual control state, an operation method for a control switch for realizing the control state recommended for the selected mode of travel is presented to a driver.

Vehicle operation method presentation device and method, and vehicle control device

A brake control device that controls braking forces applied to wheels to stabilize the behavior of a vehicle turning a corner, and includes a turning condition detection unit detecting a turning condition of the vehicle; a braking amount setting unit setting braking amounts for the respective wheels based on the turning condition detected by the turning condition detection unit; a brake control unit applying braking forces to the wheels according to the braking amounts set by the braking amount setting unit; and a road surface friction coefficient estimation unit estimating a road surface friction coefficient of the road on which the vehicle is running. The braking amount setting unit changes upper limits of the braking amounts for the respective wheels according to the road surface friction coefficient when the vehicle is in a center differential lock mode or a direct four-wheel drive mode.

Brake control device for vehicle

The inventive vehicle behavior control device employs a novel control strategy, suppressing deterioration of a vehicle behavior which would be induced during control processes, and being useful especially for correcting or inhibiting excessive deterioration of a vehicle behavior such as when a risk of rolling-over is detected. The device firstly judges if a possibility of rolling-over of the vehicle is high and calculates a target braking control amount for reducing the possibility of rolling-over in accordance with the result of the judgment of a possibility of rolling-over of the vehicle, where the target control amount when the possibility of rolling-over is high is set higher than when the possibility is low. Then, under control of the inventive control device, wheel braking force is controlled based upon the target braking control amount. After the starting of control of the wheel braking force, however, increasing and decreasing gradients of wheel braking force is restricted when a high possibility of rolling-over is judged.

Vehicle behavior control device

A tire air-pressure abnormality alarming device for informing decrease in air-pressure of tires attached to a four-wheeled vehicle, characterized in that the device prohibits start of initializing operations for updating stored values for physical amounts related to tires or wheels in the case where air-pressures of the tires are judged to be normal, if air-pressure abnormality of a tire is being alarmed. Initialization is accepted only after the internal pressure has become normal, whereby erroneous initialization with any tire being in a decompressed condition can be prevented. Thus, normal operations for detecting decompression of a tire can be maintained.

Tire air-pressure abnormality alarming device and method thereof

The present invention is directed to an unpaved road detection system wherein a slip rate is calculated on the basis of wheel speeds detected by wheel speed sensors and a vehicle speed detected by a vehicle speed detection device. A linear acceleration sensor is provided for detecting an acceleration of the vehicle in a longitudinal direction thereof to produce a signal linearly proportional to the detected acceleration. A variation of the signal produced by the linear acceleration sensor corresponding to the variation of the slip rate is calculated. The variation of the signal is compared with a reference value. If the variation exceeds the reference value, it is determined that the vehicle is traveling on an unpaved road. The variation may be provided by calculating a difference between a first signal detected by the linear acceleration sensor when the slip rate exceeded a first reference rate, and a second signal detected by the linear acceleration sensor when the slip rate exceeded a second reference rate.

Unpaved road detection system

Growing community of inventors

Toyota, Japan

Yasushi Kobayashi