Electromagnetically actuatable valve
| Title: | Electromagnetically actuatable valve |
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| Patent Number: | 4,976,405 |
| Publication Date: | December 11, 1990 |
| Appl. No: | 07/485,906 |
| Application Filed: | February 28, 1990 |
| Abstract: | An electromagnetically actuatable valve is proposed that serves in particular as a fuel injection valve for fuel injection systems of internal combustion engines. An armature cooperates with magnet poles, and a bearing cone the length of the generatrix of which is approximately equivalent to the diameter is machined into a valve seat body. The armature and valve seat body may also have bearing faces of calotte shape facing one another. |
| Inventors: | Graner, Juergen (Ludwigsburg, DEX); Kirchner, Marcel (Stuttgart, DEX); Kubach, Hans (Korntal-Muenchingen, DEX) |
| Assignees: | Robert Bosch GmbH (Stuttgart, DEX) |
| Claim: | What is claimed and desired to be secured by Letters Patent of the United States is |
| Claim: | 1. An electromagnetically actuatable valve, in particular a fuel injection valve for fuel injection systems of internal combustion engines, having a core (11, 11') and an armature (10) of soft magnetic material arranged to actuate a valve element (2) adapted to cooperate with a fixed valve seat (4), said valve element (2) provided with a sealing element (3) movable outwardly for opening the valve, said armature (10) being connected to the valve element (2) by a connecting part (9), said connecting part (9) being arranged to protrude through a flow bore (53) of a valve seat body (5), said valve seat body (5) further having a frustoconical bearing cone (27) machined therein a length of a surface line of which is approximately equivalent to a mean diameter thereof, and said armature (10), on its side remote from the core (11, 11'), has a frustoconical surface adapted to engage a majority of a surface portion of the bearing cone. |
| Claim: | 2. A valve as defined by claim 1, in which an undercut (37) is provided in the frustoconical surface of the armature (10). |
| Claim: | 3. A valve as defined by claim 1, in which slits (17) are machined into the bearing cone (27), said slits extending over a portion of the bearing cone (27), terminate at a ring (36), and pierce the valve seat body (5). |
| Claim: | 4. A valve as defined by claim 2, in which slits (17) are machined into the bearing cone (27), said slits extending over a portion of the bearing cone (27), terminate at a ring (36), and pierce the valve seat body (5). |
| Current U.S. Class: | 25112/916; 25112/922; 239/585 |
| Current International Class: | F16K 3106; B05B 132 |
| Patent References Cited: | 4546339 October 1985 Kubach 4666087 May 1987 Jaggle et al. 4778112 October 1988 De Concini et al. |
| Primary Examiner: | Rosenthal, Arnold |
| Attorney, Agent or Firm: | Greigg, Edwin E. |
| Accession Number: | edspgr.04976405 |
| Database: | USPTO Patent Grants |
| Language: | English |
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