Low inertia, wear-resistant valve for engine fuel injection syst

Details Low inertia, wear-resistant valve for engine fuel injection syst Low inertia, wear-resistant valve for engine fuel injection syst

1994-08-10

1997-03-04

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

2395333, 239DIG19, F02M 4702

Patent

active

056071060

ABSTRACT:
A low inertia, wear-resistant needle valve assembly is provided for an internal combustion engine closed nozzle unit fuel injector. The needle valve assembly includes a needle and spring retainer subassembly made from an advanced structural ceramic, such as silicon nitride. A valve seat subassembly in the injector cup is made from a combination of metal and ceramic. The assembly materials and configuration provide maximum control over the efficiency of the injection event so that the fuel injection event can be terminated quickly, thereby allowing more effective control over exhaust emissions.

REFERENCES:
patent: 4266729 (1981-05-01), Kulke et al.
patent: 4544096 (1985-10-01), Burnett
patent: 4962887 (1990-10-01), Matsuoka
patent: 5076244 (1991-12-01), Donaldson
patent: 5095872 (1992-03-01), Kawamura
patent: 5409165 (1995-04-01), Carroll, III et al.

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