Vehicle braking control apparatus
US4629039A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 3, 1986 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Jan 3, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2125/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.