Toyota Jidosha Kabushiki Kaisha

Yazaki Corporation

Advics Co., Ltd.

Other

Denso Corporation

Asmo Co., Ltd.

Honda Motor Co., Ltd.

Aisin Seiki Kabushiki Kaisha

Takayuki Yamamoto

Masanori Tsuji

Masaru Fukuda

Tadahiro Sueyoshi

Yasuhiro Nagasaka

Yasuo Hirayama

Yoshihiro Murakami

Tetsuya Miyazaki

Yasuhito Ishida

Hidetaka Okabe

Ichiro Shibata

Yasuji Mizutani

Hiroyuki Kodama

Hiroshi Isono

Chieko Torii

Tatsushi Kobayashi

Naoki Sawada

Masato Ozawa

Tomotaka Asano

Masaaki Komazawa

Hiroaki Aizawa

Yoshito Tanaka

Seiichi Kojima

Hiroyuki Ando

Koichi Kokubo

Yoshio Masuda

Masayasu Ohkubo

Masakuni Samejima

Hiroshi Nakaoka

Yasushi Hanaki

Ken Kuzuya

Koji Watanabe

Kunihiro Nishiwaki

Naoki Ueno

Yoshiyuki Yasui

Eiji Nakamura

Hiroaki Niino

Akira Maeda

Yoshitsugu Sawada

Yusuke Tatara

Satoru Niwa

Tomoyuki Kikuta

Kimihiro Matsuura

Naoki Yabusaki

Harunori Tashiro

Hidehiko Shimizu

Terushige Uraoka

Takashi Satou

Kazunori Nimura

Shintaro Uchida

Hiroyuki Matsubayashi

Sakae Tsukamoto

Osayoshi Kato

Kumiko Akita

Kyosuke Hata

Keiji Murashima

Takuya Hirano

Ryosuke Endo

A brake control device includes an electric pump, a pressure adjustment valve that adjusts a hydraulic pressure of a brake fluid discharged by the electric pump to an adjustment hydraulic pressure and supplies the brake fluid in a rear wheel cylinder, and a master unit provided with a servo chamber into which brake fluid at the adjustment hydraulic pressure is supplied and in which the adjustment hydraulic pressure is converted into a forward force of a master piston, and a master chamber fluidically separated from the servo chamber by the master piston and connected to the front wheel cylinder and in which a rearward force converted from the hydraulic pressure in the front wheel cylinder and is applied to the master piston. Also included is an input unit provided with an input chamber and a simulator, and a controller configured to control the electric pump and the pressure adjustment valve.

Brake control device for vehicle

A vehicle braking device provided with a hydraulic circuit having a first system, a second system, and a connection flow channel connecting both systems. The vehicle braking device includes a fluid supply unit supplying fluid to the first system, a first braking unit, for applying a braking force to a first wheel by using the fluid flowing in the first system, a second braking unit, for applying a braking force to a second wheel by using the fluid flowing in the second system, a determination unit for determining whether the fluid is leaking from the second system, and a control unit for executing specific control for controlling the fluid supply unit so that an amount of fluid supplied to the first system is increased in response to determination by the determination unit that the fluid is leaking from the second system.

Vehicle braking device

A braking control device for a vehicle includes a malfunction detector configured to detect a malfunction of a first stroke sensor or a second stroke sensor, a memory configured to store a first stroke and a second stroke, a stroke calculator for first calculation configured to calculate, from the first stroke and the second stroke, an average value for calculating a target deceleration before a malfunction is detected by the malfunction detector, a stroke calculator for second calculation configured to calculate, from the average value and the second stroke (first stroke), an additional value for calculating the target deceleration after the malfunction is detected, and a target deceleration setting circuit configured to set the target deceleration from the average value or the additional value.

Braking control device for vehicle

A vehicle brake device includes a stroke simulator, a stroke sensor, and a brake start determination unit. The stroke simulator includes a cylinder, a piston, an orifice, and a pressure sensor. The cylinder defines a liquid pressure chamber to which a brake liquid is supplied via a fluid path. The piston slides in the cylinder by the brake liquid supplied to the liquid pressure chamber. The orifice is formed in the fluid path. The pressure sensor detects a reaction pressure. The stroke sensor is configured to detect the stroke. The brake start determination unit determines an operation of the brake operation member has been started in a case where the reaction pressure detected by the pressure sensor becomes equal to or greater than a first threshold value and the stroke detected by the stroke sensor becomes equal to or greater than a second threshold value.

Vehicle brake device

A vehicle includes a regenerative generator on a front wheel. A braking control device includes an actuator that applies a front wheel torque and a rear wheel torque, and a controller that individually adjusts the front wheel torque and the rear wheel torque. The controller is configured to determine the front wheel torque and the rear wheel torque to zero when a regenerative braking force Fg generated by the regenerative generator has not reached a maximum regenerative force Fx which is a generatable maximum value. On the other hand, the controller is configured to increase the rear wheel torque from zero before increasing the front wheel torque from zero when the regenerative braking force Fg reaches the maximum regenerative force Fx.

The braking device for vehicles includes a reduction amount setting part for setting the amount by which to reduce the revolution of a pump motor during maintenance or reduction of controllable differential pressure so that the reduction amount decreases as the probability increases of needing to discharge the brake fluid by pumps, during a period from when a brake controller begins reducing the revolution until the lapse of prescribed time.

Braking device for vehicles

A braking control device includes a master unit including a master chamber connected to a front wheel cylinder and a servo chamber that applies forward force opposing a reverse force applied to a master piston by the master chamber to the master piston, a pressure adjustment unit that adjusts brake fluid discharged by a pump to a first liquid pressure by a first solenoid valve and introduces the first liquid pressure to a rear wheel cylinder, and adjusts the first liquid pressure to decrease to a second liquid pressure by a second solenoid valve and introduces the second liquid pressure to the servo chamber; and a regenerative coordination unit having an input piston operable in conjunction with a braking operation member and an input cylinder fixed to the master cylinder, and in which a gap between the master piston and the input piston is controlled by the second liquid pressure.

A braking device includes: a reservoir; a master cylinder in which when the amount of operation performed on a brake pedal reaches or exceeds a predetermined amount, a port communicating between a pressure chamber and the reservoir is cut off and hydraulic pressure corresponding to the brake pedal operation amount is generated; a hydraulic pressure unit for adjusting the wheel cylinder hydraulic pressure; and a control unit for controlling the hydraulic pressure unit. The control unit determines, based on a temperature-related value related to the temperature of a friction member pressed by the wheel cylinder hydraulic pressure against a rotating member fixed to a wheel, whether the friction member is in a fade state. When the friction member is in a fade state, the control unit controls the hydraulic pressure unit to suction brake fluid from the reservoir through the port, and is fed to the wheel cylinder.

Braking device for vehicle

A brake control mounted in a vehicle equipped with a regenerative generator on either the front wheels or the rear wheels including a first pressure adjusting unit that adjusts a liquid pressure generated by a first electric motor to a first liquid pressure and provides the first liquid pressure to wheel cylinders of wheels on one side; and a second pressure adjusting unit that is configured by a fluid pump, which is driven by a second electric motor, and a pressure adjusting valve, and that performs adjustment to increase the first liquid pressure to a second liquid pressure and provides the second liquid pressure to wheel cylinders of wheels on the other side.

Vehicle brake control device

A braking control device includes a first adjustment unit, a master unit, a regenerative coordination unit, a first opening/closing valve, a second opening/closing valve, a reaction force hydraulic pressure sensor, an input hydraulic pressure sensor, a controller. The master unit includes a master cylinder and a master piston, a master chamber, a servo chamber, and a reaction force chamber. The regenerative coordination unit includes an input piston. The first opening/closing valve provided in a first fluid passage. The second opening/closing valve provided in a second fluid passage. The reaction force hydraulic pressure sensor detects a pressure in the reaction force chamber. The input hydraulic pressure sensor detects a pressure in the input cylinder. The controller determines, based on the reaction force hydraulic pressure and the input hydraulic pressure, suitability of at least one of the master unit, the regenerative coordination unit, the first opening/closing valve, and the second opening/closing valve.

A brake control device including a pressure adjusting unit including an electric pump and an electromagnetic valve, and that adjusts, using the electromagnetic valve, a brake liquid discharged by the electric pump to an adjusted liquid pressure and introduces the adjusted liquid pressure to the wheel cylinders of the rear wheels; and a master unit that includes a master cylinder and a master piston, and that includes a master chamber connected to the wheel cylinders of the front wheels and a servo chamber to which the adjusted liquid pressure is introduced and which provides, to the master piston, an advancing force that opposes a retreating force applied to the master piston by the master chamber.

This vehicle control system is provided with an input monitoring unit and a determination time changing unit. When a state in which first target data is not input to a second control unit continues for a first determination time or longer, the input monitoring unit determines the first target data to be in a non-input state. When a state in which second target data is not input to the second control unit continues for a second determination time or longer, the input monitoring unit determines the second target data to be in a non-input state. When the first target data is determined to be in a non-input state, the determination time changing unit shortens the second determination time.

Vehicle control system

A braking device includes a stroke simulator, a hydraulic pressure generation unit, a reaction hydraulic pressure detection unit, a master hydraulic pressure detection unit, and a bottoming determination unit. The stroke simulator includes a cylinder and a piston slidably movable inside the cylinder in conjunction with an operation of a brake operation member. The stroke simulator causes a reaction force chamber to generate a reaction hydraulic pressure and applies a reaction force. The hydraulic pressure generation unit generates a master hydraulic pressure by driving a master piston and supplies a hydraulic pressure to a wheel cylinder. The reaction hydraulic pressure detection unit detects the reaction hydraulic pressure. The master hydraulic pressure detection unit detects the master hydraulic pressure. The bottoming determination unit determines whether the master piston is in a bottoming state based on the reaction hydraulic pressure and the master hydraulic pressure.

A sensor monitoring device that comprises: a first controller ECA into which a detected value Smn from a sensor SMN is inputted via a first signal line LMA; a second controller ECB into which the detected value Smn is inputted via a second signal line LMB; and a communication bus CMB that transmits signals between the first controller ECA and the second controller ECB. The second controller ECB reads in the detected value Smn as a second processing value Smb and transmits the second processing value Smb to the first controller ECA via the communication bus CMB. The first controller ECA reads in the detected value Smn as a first processing value Sma, receives the second processing value Smb, and, on the basis of the first processing value Sma and the second processing value Smb, determines the suitability of the first processing value Sma.

Sensor monitoring device and braking control device for vehicle provided with sensor monitoring device

This vehicle brake device comprises: a simultaneous driving determination section which determines whether it is necessary to simultaneously drive an upstream-side motor and a downstream-side motor; and a PWM control section which, when the determination result by the simultaneous driving determination section is in the affirmative, changes the duty ratio of the PWM signal to be output to the upstream-side motor so as to be smaller than when the determination result by the simultaneous driving determination section is in the negative, and uses PWM control to drive the upstream-side motor.

Growing community of inventors

Aichi-gun, Japan

Takayuki Yamamoto