Fuel injection system comprising an injection valve for a self-i

Details Fuel injection system comprising an injection valve for a self-i Fuel injection system comprising an injection valve for a self-i

1996-02-26

1998-01-13

Wolfe, Willis R.

Internal-combustion engines

Precombustion and main combustion chambers in series

Having combustible mixture forming means

123299, 25112921, 2395337, F02B 1910, F02B 308, F16K 3106, F02M 6106

Patent

active

057067783

ABSTRACT:
A fuel injection system which includes an injection valve for a self-igniting internal combustion engine with direct fuel injection, in particular for liquefied gas fuels, and which is configured as a pintle-type nozzle opening against the force of at least one spring, has the opening force of its fuel needle directly provided by the magnetic force of a solenoid so as to create simplified rate shaping. The magnetic force increases quadratically with the needle lift vis-a-vis the force of the spring increasing linearly with the needle lift, resulting in an opening velocity of the needle increasing approximately quadratically, at least in certain regions, thus permitting small pintle lifts, and the needle has a maximum needle lift of smaller than 1 mm, i.e., preferably smaller than 0.5 mm.

REFERENCES:
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patent: 4810985 (1989-03-01), Mesenich
patent: 4984549 (1991-01-01), Mesenich
patent: 5088467 (1992-02-01), Mesenich
patent: 5329902 (1994-07-01), Sakamoto et al.
patent: 5335861 (1994-08-01), Matusaka
patent: 5494223 (1996-02-01), Hall et al.

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