Electromagnetically actuated valve for hydraulic motor vehicle brake systems
US6152420A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1998 |
| Grant date | Nov 28, 2000 |
| Priority date | — |
| Expiry date | Aug 7, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T15/028
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The valve has a seat valve with a hollow-conical valve seat and a closing member in the form of a spherical layer on a longitudinally drilled tappet. An inflow bore communicating with a pressure medium inlet discharges centrally into the valve seat. The largely pressure-equalized tappet is engaged by a magnet armature acting on the seat valve in a closing manner and by a restoring spring acting in the opening direction. The valve embodied in principle as a switching valve is controllable into stable intermediate positions on the basis of the following provisions: the cone angle of the valve seat is at most 90.degree.; the force at the closing member, originating in the restoring spring, is adapted such that it has a course that decreases monotonously with an increasing valve opening stroke (h); the magnet circuit of the valve is embodied such that the magnetic force (F.sub.M) exerted on the magnet armature and transmitted to the closing member is variable in infinitely graduated fashion and has a course that decreases monotonously with increasing valve opening stroke (h), the negative slope of which course is less quantitatively than that of the course of spring force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.