Fuel injection valve

Fluid sprinkling – spraying – and diffusing – Fluid pressure responsive discharge modifier* or flow... – Fuel injector or burner

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2395339, F02M 6110

Patent

active

052054926

ABSTRACT:
The fuel injection valve for injecting fuel into a combustion chamber of an internal combustion engine comprises a valve housing and nozzle, having a nozzle body 1 with an axial bore 13 which has a slidable but not liquid-tight fitted nozzle needle 3 for reciprocating movement between opened and closed positions. In the upper portion of the axial bore 13 the sealing bellows 5 is fitted. The bottom of the bellows 5 is permanently kept in contact with upper end face of the nozzle needle 3. The bellow's flange is held in liquid-tight fashion between space 8 and top end face of the nozzle body for sealing the clearance between nozzle needle and body. A push rod 6 is the bellows 5 to impart an urging spring force to the nozzle needle 3. During the operation the nozzle needle 3 is lifted in unison with the bellows 5 against increased fuel pressure within the axial bore 13 in addition to the urging force of the nozzle spring 18. Thus a gradual lifting motion of the nozzle needle 3 is achieved and accordingly the fuel injection quantity is gradually increased at the start of the injection.

REFERENCES:
patent: 1973666 (1934-09-01), Sidney
patent: 2391808 (1945-12-01), Vincent
patent: 2613998 (1952-10-01), Noon et al.
patent: 2626186 (1953-01-01), Nakken
patent: 3282512 (1966-11-01), Bluhm et al.
patent: 4546924 (1985-10-01), Winquist
patent: 4646975 (1987-03-01), Horn
patent: 4768719 (1988-09-01), Straubel et al.
patent: 4976518 (1988-10-01), Yamamoto

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