Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1986-01-03
1986-12-16
Butler, Douglas C.
Brakes
Wheel
Axially movable brake element or housing therefor
188 723, 188 724, 188106P, 188158, 303 68, 303113, 303119, 310328, B60T 802, F16D 5508
Patent
active
046290397
ABSTRACT:
A wheel cylinder is formed in the brake caliper for each wheel of a vehicle and brake fluid is supplied from a master cylinder to this wheel cylinder by way of a fluid passage. A brake piston is provided inside the wheel cylinder and includes a piezoelectric piston device inside. By the application of voltage, this piezoelectric piston device expands and contracts the brake piston. A control valve is provided in the fluid passage to open and close it to selectively partition off the master cylinder. When the control valve has closed the passage, a voltage is applied to the piezoelectric piston device to expand it and control the pressure acting on the brake piston in the wheel cylinder to vary the braking force.
REFERENCES:
patent: 3313381 (1967-04-01), Hartling et al.
patent: 4130188 (1978-12-01), Askew
patent: 4228874 (1980-10-01), Brinkmann et al.
patent: 4299312 (1981-11-01), Bengtsson et al.
patent: 4433757 (1984-02-01), Warwick et al.
patent: 4435021 (1984-03-01), Hoenick
patent: 4553059 (1985-11-01), Abe et al.
patent: 4570095 (1986-02-01), Uchikawa
patent: 4570098 (1986-02-01), Tomita et al.
Four Years of Experience with 4-Wheel Antiskid Brake Systems (ABS), Heinz Leiber et al, pp. 1-8.
Hattori Yoshiyuki
Imoto Yuzo
Takei Toshihiro
Tanaka Taro
Butler Douglas C.
Nippon Soken Inc.
Nippondenso Co., Ltd
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