Toyota Jidosha Kabushiki Kaisha

Subaru Corporation

Takami Iwamoto

Masahiro Hara

Tetsuya Miyazaki

Masakuni Suzuki

Kumiko Akita

Shotaro Arai

Yuto Yokoyama

Daigo Tateishi

Junichi Katsumata

Shun Nagai

Hiroki Maeda

An ECU of a vehicle executes a regeneration process to control an electric motor so as to generate regenerative torque during deceleration caused by an accelerator OFF. The ECU executes a torque gradual decrease process to decrease the regenerative torque in a wheel slip detection state more gradually at a time when a brake pedal is depressed after a start of the deceleration and ABS control is not activated than a time when the brake pedal is not depressed after the start of the deceleration. The ECU executes a hydraulic pressure increase process to increase the upstream hydraulic pressure such that, when the ABS control is activated while the brake pedal is depressed after the start of the deceleration, the upstream hydraulic pressure has a value necessary for generating a braking torque having a magnitude according to the regenerative torque generated at a start of the ABS control.

Vehicle and vehicle control method

A hydraulic brake system for a vehicle includes a brake having a wheel cylinder that applies a braking force to a wheel, and a pressurizing device. The pressurizing device pressurizes the brake liquid and includes a suction portion for sucking a brake liquid, and additionally includes an output portion connected to the wheel cylinder. A linear solenoid valve includes at least one housing, and is connected to the wheel cylinder and to the suction portion of the pressurizing device. The solenoid valve includes a valve portion having a reciprocating valve member and a valve seat opposed to the valve member. A biasing member biases the valve member in one direction and a solenoid applies a drive force to the valve member in an opposite direction. In addition, a hydraulic-pressure-decrease restraining device restrains a decrease of pressure of the brake liquid in the housing.

Hydraulic brake system

Growing community of inventors

Toyota, Japan

Takami Iwamoto