Plunger system for modulating a brake pressure
US4798421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1987 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Oct 13, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/489
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A plunger system in a brake line between a master brake cylinder and a wheel brake cylinder of a vehicle, for modulating a brake pressure in the event of a sensor-detected danger of wheel locking or wheel spinning. The plunger system has a plunger that is axially displaceable in a housing. At one end, the plunger engages a variable pressure chamber toward the master brake cylinder and at the other it engages a variable pressure chamber toward the wheel brake cylinder. It has an axial bore, through which a rod passes, between the two pressure chambers, and this bore can be closed on opposite ends if there is a danger of wheel locking or if wheel spinning occurs. The closure of the axial bore is effected by an axial motion of the plunger, which takes place if the wheels lock, on the one hand, and if they spin, on the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.