Toyota Jidosha Kabushiki Kaisha

Advics Co., Ltd.

Hidehisa Kato

Yoshinori Watanabe

Masahiro Hara

Hiroyuki Matsubayashi

Ryochi Watanabe

Yuta Ohashi

Junji Kawamuro

Mitsutaka Tanimoto

Yusuke Suetake

Yuji Yoshii

Tetsuhiro Narita

Noritsugu Iwazaki

Michihiro Otsubo

A vehicle control device includes a processor. The processor calculates an instruction value of an operation request for controlling an operation of an actuator mounted on a vehicle based on a motion request from an application. The processor executes feedback control on the instruction value using a deviation between the motion request and a motion result of the vehicle that is calculated based on one of detection values of four wheel velocity sensors. The processor calculates the motion result in the feedback control based on a detection value indicating the second largest vehicle body velocity among the vehicle body velocities indicated by the detection values of the four wheel velocity sensors when the vehicle is braked.

Vehicle control device

A braking force control apparatus has an upstream braking actuator for generating an upstream pressure common to four wheels, a downstream braking actuator individually controlling braking pressures supplied to braking force generating devices of the wheels using the upstream pressure, and a control unit. When the downstream braking actuator is abnormal and the upstream pressure can be supplied to the braking force generating devices, but a braking pressure of any one of the wheels cannot be normally reduced, the control unit selects higher one of the target braking pressures of the left and right front wheels and higher one of the left and right rear wheels, determines lower one of the two selected target braking pressures as a backup target upstream pressure, and controls the upstream braking actuator such that the upstream pressure becomes the backup target upstream pressure.

Braking force control apparatus for a vehicle

A braking force control apparatus is provided which has an upstream braking actuator for generating an upstream pressure common to four wheels, a downstream braking actuator individually controlling braking pressure supplied to braking force generating devices of the wheels using the upstream pressure, and a control unit. When the downstream braking actuator is abnormal and the upstream pressure can be supplied to the braking force generating devices, but a braking pressure of any one of the wheels cannot be normally controlled, the control unit selects a control mode on the pressure increasing side out of the front wheel control modes, selects a control mode on the pressure increasing side out of the rear wheel control modes, selects a control mode on the pressure decreasing side out of the two selected control modes as a prescribed control mode, and controls the upstream pressure in the prescribed control mode.

Braking force control apparatus for vehicle

Provided is a control apparatus for a four-wheel-drive vehicle configured to, when a degree of transmission of a driving force to a side of rear wheels is smaller than a predetermined degree, calculate a correction value for a wheel speed based on a rotation-related value, and calculate a wheel speed through use of the rotation-related value and the correction value.

Control apparatus for four-wheel-drive vehicle

In a vehicle brake device having a hydraulic pressure sensor for detecting an output value corresponding to the pressure of a fluid pressure adjusted by a master cylinder and a master cylinder pressure calculating unit for storing the output value of the hydraulic pressure sensor at which the pressure of the master cylinder becomes 0 as a zero-point correction value and calculating a master cylinder pressure by correcting the output value of the hydraulic pressure sensor based on the zero-point correction value, the vehicle brake device has a zero-point correction value updating unit for setting, when the output value detected by the hydraulic pressure sensor is smaller than the zero-point correction value stored in the master cylinder pressure calculating unit, the output value as a new zero-point correction value and updating the zero-point correction value.

Vehicle brake device

When a the brake assist control and a left/right distribution control are performed at the same time, since braking forces, which are equal to or larger than the braking force generated by a brake operation of a driver, are generated to wheels by the brake assist control, in a case where the driver requests a large deceleration, a desired deceleration can be obtained. Further, since a difference is made between the braking forces generated to left/right wheels by the left/right distribution control, in a case where a yaw direction behavior is generated to a vehicle, the yaw direction behavior can be reduced by a difference between the braking forces.

Vehicle stabilization controlling apparatus

A vehicle braking apparatus that can exert high braking performance during vehicle braking is implemented by a control mode that can be realized in a braking apparatus () of usual hardware. In controlling the braking apparatus () of a vehicle, a climb rate of a wheel cylinder braking oil pressure (Pw) is decreased smaller than a climb rate corresponding to a climb rate of a master cylinder oil pressure (Pm) from a time point at which the wheel cylinder braking oil pressure (Pw) reaches a predetermined threshold value. The time point at which the wheel cylinder braking oil pressure (Pw) reaches the predetermined threshold value (P) is estimated based on the climb process of the master cylinder oil pressure (Pm) or directly detected.

Vehicle braking apparatus suppressing excessive slip of wheel during braking

A vehicle braking device including a braking operation judging unit that judges that a braking operation is input when a fluid pressure detected by a pressure detecting sensor is not smaller than a threshold value set in advance in a process of a first mode in which it is judged that the device normally operates, and judges that the braking operation is input when judging that wheel deceleration of a tire detected by a wheel speed detecting sensor is larger than a threshold value in a process of a second mode in which it is judged the pressure detecting sensor does not normally detect a pressure or it is judged that a failure occurs in the fluid pressure, and a control unit puts a brake lamp arranged on a vehicle body into a lighting state from a non-lighting state when it is judged that the braking operation is input.

Vehicle braking device and control device

A brake controlling apparatus (electronic control unit) of a braking device including a booster valve to be opened at a time of request to boost a pressure of a brake liquid to supply to a wheel to be controlled, and a piston pump for supplying pressurized brake liquid to an upstream side of the booster valve, the brake controlling apparatus including a brake liquid pressure controlling unit that sets a duty ratio between a closing period and a opening period of the booster valve so that a dischargeable period of the brake liquid in the piston pump appears in the opening period of the booster valve and controls the booster valve based on the duty ratio.

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Susono, Japan

Hidehisa Kato