Distributor-type fuel injection pump for internal combustion engines
US5592920A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1995 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Jun 29, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M41/1405
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A distributor-type fuel injection pump of the radial-plunger type with two intersecting cylinder bores in the rotor part, in each of which two pump plungers arranged opposite one another and delimiting a common pump working space are guided. The pump plungers guided in the first cylinder bore are here designed with an axial length such that, during their delivery stroke, they project into the second cylinder bore, the pump plungers of which do not reach the first cylinder bore even in the case of the maximum delivery stroke. According to the invention, the short pump plungers have a stop formed by a collar on their end projecting out of the cylinder bore, and this stop prevents the short pump plungers from slipping unintentionally in between the long pump plungers when the pump is switched off, thus allowing the delivery stroke of the pump plungers to be increased to an extent such that, during their suction stroke, the long pump plungers leave the cylinder bore guiding the short pump plungers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.