Electronically-controlled fluid injector system having pre-injec

Details Electronically-controlled fluid injector system having pre-injec Electronically-controlled fluid injector system having pre-injec

1995-05-10

1996-09-03

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Fuel injection system

123496, 123500, F02M 3704

Patent

active

055513980

ABSTRACT:
An improved electronically-controlled fluid injector system comprises a fluid storage chamber and a direct-operated check. Pressurization of fluid in the storage chamber begins before the start of fluid injection. Fluid injection begins by hydraulically unbalancing the check. Fluid injection sharply ends by hydraulically balancing the check to allow a biasing device to close the check.
The present invention provides improved control of several fluid injection parameters, including higher peak fluid injection capability and less fluid injection pressure drop at the end of injection, resulting in improved engine performance and lower emissions, noise, and wear.

REFERENCES:
patent: 3570807 (1971-03-01), Sturman et al.
patent: 4211202 (1980-07-01), Hafner
patent: 4628881 (1986-12-01), Beck et al.
patent: 5046472 (1991-09-01), Linder
patent: 5235954 (1993-08-01), Sverdlin

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