Title:
ノズル本体下部が冷却される燃料インジェクタ
Document Type and Number:
Japanese Patent JP2006524779
Kind Code:
A
Abstract:
A fuel injector is provided with a lower nozzle body which is cooled with a small amount of metered fuel. In one embodiment, a blind passage is formed to extend from the upper portion to the lower end of the injector nozzle valve element. A transverse passage is formed in the nozzle valve element connecting the blind passage and the nozzle bore. Rail pressure causes a metered amount of fuel to flow through the nozzle bore, the transverse passage and upwardly along the blind passage to the drain passage. Inward cooling occurs by providing more surface area over which the fuel flows. In another embodiment, a sleeve is formed to fit over an existing nozzle to form a passage surrounding the injector tip. An orifice is located in the nozzle housing to connect the nozzle cavity with the annular passage thereby providing a small amount of fuel to drain.
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Inventors:
Chenanda, Career Pa, M.
Buchanan, David, Elle.
Peters, Leicester, Elle.
Buchanan, David, Elle.
Peters, Leicester, Elle.
Application Number:
JP2006513328A
Publication Date:
November 02, 2006
Filing Date:
April 26, 2004
Export Citation:
Assignee:
Cummins Incorporated
International Classes:
F02M53/04; F02M55/00; F02M61/04; F02M61/10; F02M59/46; F02M63/02
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Katsuichi Nishimoto
Kato Kazunori
Katsuichi Nishimoto