Apparatus for generating pre-injections in unit fuel injectors

Details Apparatus for generating pre-injections in unit fuel injectors Apparatus for generating pre-injections in unit fuel injectors

1987-08-31

1989-03-14

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Processes

Of fuel injection

239 90, 239 91, 239 93, 239 96, 239585, 123299, 123447, F02M 4702

Patent

active

048118990

ABSTRACT:
In an apparatus for generating pre-injection quantities in unit fuel injectors for Diesel engines, including a pre-injection slide that generates a pronounced pressure intensification for a pre-injection in a pressure chamber closed off with respect to the high-pressure side and opens towards the injection line is slidably supported in a guide bore. The pre-injection slide is exposed to the injection pressure of an element chamber in such a way that after the execution of a partial stroke, which is responsible for the pre-injection quantity, upon further movement the pre-injection pressure chamber is opened toward the element chamber and thereby relieved, and by the ensuing movement of the pre-injection slide until the end of the stroke, a pre-determinable capacity that enables an injection pause is formed. A valve which is supported inside the pre-injection slide is under the control of a magnetic valve associated with the unit fuel injector and provides for the filling of the pre-injection pressure chamber forms selectively actuatable shutoff control for the pre-injection.

REFERENCES:
patent: 3392715 (1968-07-01), Thomas
patent: 3394891 (1968-07-01), Voit
patent: 3627208 (1971-12-01), Scott et al.
patent: 4108383 (1978-08-01), Thoma
patent: 4258883 (1981-03-01), Hofmann et al.
patent: 4289098 (1981-09-01), Norberg et al.
patent: 4669659 (1987-06-01), Leblanc et al.
patent: 4681080 (1987-07-01), Schukoff
patent: 4704999 (1987-11-01), Hashikawa et al.

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