Gaseous fuel injector

Details Gaseous fuel injector Gaseous fuel injector

2005-10-24

2008-10-21

Tran, Len (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Injection nozzle opened by relieving supply

C239S413000, C239S417500, C239S419000, C239S427000, C239S533120, C239S584000, C239S585100, C239S433000, C239S434000, C123S304000, C123S525000

Reexamination Certificate

active

07438238

ABSTRACT:
The injector includes a nozzle, a needle, a control chamber, a working fluid supply passage, an electric switching valve, a high-pressure gaseous fuel supply passage and a lubrication liquid fuel supply passage. The nozzle has an injection hole, through which high-pressure gaseous fuel is injected. The needle is axially reciprocably received in the nozzle to open and close the injection hole. The needle includes a sliding portion and a valve portion. The control chamber applies a pressure to the needle. The working fluid supply passage supplies liquid fuel to the control chamber. The electric switching valve controls an inflow/outflow of the liquid fuel to/from the control chamber. The high-pressure gaseous fuel supply passage supplies the high-pressure gaseous fuel to the injection hole. The lubrication liquid fuel supply passage supplies the liquid fuel from the working fluid supply passage to the sliding portion and the valve portion.

REFERENCES:
patent: 4691674 (1987-09-01), Otsuka et al.
patent: 4774909 (1988-10-01), Dolderer
patent: 6298833 (2001-10-01), Douville et al.
patent: 6811105 (2004-11-01), Kato et al.
patent: 63-4365 (1988-01-01), None
patent: 1-88054 (1989-06-01), None
patent: 2003-232234 (2003-08-01), None

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