Showing papers by "Friedrich Boecking published in 1996"

Filter for a fuel injection valve for internal combustion engines

Abstract: A fuel injection valve for internal combustion engines, having a fuel inflow conduit, which discharges at an injection opening, and into which inflow conduit a rodlike filter body is inserted, preceding the injection opening, which filter body on each of its face ends has one collar of enlarged diameter compared with a middle portion of the filter body, and into whose jacket face two groups of longitudinal grooves axially closed on one end are machined. A first group begins at an upper end face of the filter body remote from the injection opening and a second group begins at a lower end face thereof toward the injection opening, the longitudinal grooves of the first and second groups being distributed in alternation over the circumference of the filter body. To reliably prevent dirt particles from passing through the filter body, the lower collar extends past the axially closed end of the longitudinal grooves of the first group.

Fuel injection valve arrangement for internal combustion engines

Abstract: A fuel injection valve for internal combustion engines has a piston-shaped valve member (27) axially guided in a valve body (19) axially braced against a valve retaining body (25) by a tensioning nut (23). The area of the valve body (19) around the inlet of a supply duct (59) into a pressure chamber (51) in the valve body (19) is exposed to very high compression forces. In order to prevent the valve body (19) from breaking in this area, the bearing surface (9) of the tensioning nut (23) formed by its front face at the side of the combustion chamber and a complementary stop (7) that is mounted in the housing of the internal combustion engine and that co-operates with the bearing surface (9), as well as a ring-shaped shoulder (65) of the tensioning nut (23) that surrounds the valve body (19) and a ring-shaped depression (67) in the valve body (19) that co-operates with the ring-shaped shoulder (65), are all conically shaped.