Aisin Seiki Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Hideo Mizukoshi

Michiharu Nishii

Satoshi Ishida

Hideyuki Kobayashi

Genji Mizuno

Akira Kasamatsu

Kyousuke Hata

A hydraulic pressure control apparatus for stabilizers controls hydraulic fluid in a hydraulic communication path hydraulically connecting cylinders each operatively connected to each stabilizer of a vehicle. The apparatus includes a spool valve provided in the hydraulic communication path. The spool valve includes a housing, a spool accommodated in the housing, first and second spool chambers defined by the spool and the housing, and a biasing member for biasing the spool. The apparatus further includes first, second, and third hydraulic communication passages, hydraulically connecting an accumulator hydraulically connected to the second spool chamber and the hydraulic communication path, hydraulically connecting the first spool chamber and the hydraulic communication path, and hydraulically connecting the spool chamber and the accumulator respectively, first, second, and third solenoid valves provided in the first, second, and third hydraulic communication passages respectively, and a control device for controlling the first, second and third valves.

Fluid pressure control apparatus for stabilizers

A hydraulic braking system capable of reducing the brake pedal stroke is provided by adding to the basic hydraulic braking system. The adding system is able to selectively execute the reduction of brake pedal stroke and, at the same time, capable of selectively adding anti-lock function and anti-slip function by including the changeover valves or opening and closing valves to the system. An auxiliary hydraulic pressure generator having a power hydraulic pressure source and regulator is interposed in the hydraulic conduit of at least one circuit, and an outlet port of the regulator is communicated to the wheel cylinders for connecting to the hydraulic conduit of the circuit. Brake pedal stroke can be reduced by inclusion of other conduit arrangements for adding the auxiliary hydraulic pressure generator and, at the same time, the changeover valve, anti-lock control changeover valve, and normally closed valve are selectively releasably added or mounted to the system, so that a brake system having short brake pedal stroke and sporty feeling can be obtained by low cost system ensuring desired braking operation. Additionally, anti-slip control for preventing the slipping of driving wheels can be added.

Hydraulic braking system

Growing community of inventors

Hazu-gun, Japan

Hideo Mizukoshi