Title:
コモンレール用インジェクタ
Document Type and Number:
Japanese Patent JP4325589
Kind Code:
B2
Abstract:
A common rail injector (1) for injecting fuel through a high-pressure channel (12) includes a control chamber (4), a control valve (102), and a drive unit (101). The control chamber (4) applies pressure to a nozzle needle (5). The control valve (102) switches communication of the control chamber (4) between the high-pressure channel (12) and a low-pressure channel (13). The drive unit (101) selectively sets a valve element (2) of the control valve (102) on a low-pressure side seat (22) or a high-pressure side seat (23). The drive unit (101) has an actuator (6) and a slide pin member (3). The slide pin member (3) slides inside a slide hole (31) to transmit a force to the valve element (2). A diameter of the low-pressure side seat (22) is less than or equal to a diameter of the high-pressure side seat (23). The pressure in the control chamber (4) is exerted as an assistance force, so that a high-pressure side seat closing load becomes less than or equal to a low-pressure side seat opening load.
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Inventors:
Shuichi Matsumoto
Application Number:
JP2005158576A
Publication Date:
September 02, 2009
Filing Date:
May 31, 2005
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F02M47/00; F02M47/02; F02M59/46; F02M61/16
Domestic Patent References:
| JP2003184689A | ||||
| JP2002195446A | ||||
| JP2003532002A |
Foreign References:
| WO2004048769A1 |
Attorney, Agent or Firm:
Motomu Itou