Title:
燃料噴射装置
Document Type and Number:
Japanese Patent JP4167230
Kind Code:
B2
Abstract:
A fuel injector for use in an internal combustion engine includes a valve needle which is engageable with a valve needle seat to control fuel injection through an injector outlet. An actuator, typically in the form of a piezoelectric actuator stack, is arranged to control fuel pressure within a control chamber and a surface associated with the valve needle is exposed to fuel pressure within the control chamber. A load transmitter, preferably in the form of a motion inverter, transmits movement of the actuator to the valve needle. The load transmitter includes a bellows arrangement which is compressible and expandable in response to said actuator movement so as to vary fuel pressure within the control chamber, thereby to control movement of the valve needle relative to the valve needle seat. A piezoelectrically operable injector is operable in an energize-to-inject mode to provide efficient opening of the valve needle and to enable rapid closure of the valve needle.
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Inventors:
Michael P. Cork
Application Number:
JP2005004327A
Publication Date:
October 15, 2008
Filing Date:
January 11, 2005
Export Citation:
Assignee:
Delphi Technologies Incorporated
International Classes:
F02M51/06; F02M47/00; F02M47/02; F02M59/46; F02M61/04; F02M63/00
Domestic Patent References:
| JP2003515032A | ||||
| JP1105771U | ||||
| JP2002202022A | ||||
| JP2002257002A |
Foreign References:
| EP1174615A1 |
Attorney, Agent or Firm:
Shuichiro Kitamura