Fuel injection pump
US4840162A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | May 10, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/0215
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a fuel injection pump for internal combustion engines having at least one pump piston defining a pump work chamber and set into reciprocating motion by a cam drive for executing an intake stroke and a supply stroke, and having an electrical switching valve controlling the duration of supply and disposed in a relief line leading from the pump work chamber to a pump interior, a non-return valve having an opening direction toward the pump work chamber is disposed in a fuel inflow line connecting the pump interior with the pump work chamber in order to attain an emergency stoppage of the engine in the event the switching valve malfunctions. The valve element of the non-return valve is acted upon on one side by a valve closing spring and on the other by a fuel-filled control chamber, with which the valve element is locked in its closing position during the closed position of the switching valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.