Title:
燃料インジェクタ制御に関する改善
Document Type and Number:
Japanese Patent JP4550862
Kind Code:
B2
Abstract:
A method of operating a fuel injector (2) including a piezoelectric actuator (4) having a stack of piezoelectric elements, comprises applying a discharge current (I DISCHARGE ) to the actuator for a discharge period so to discharge the stack from a first differential voltage level across the stack to a second, lower differential voltage level across the stack so as to initiate an injection event, and applying a charge current (I CHARGE ) to the actuator for a charge period (T3 to T4') so as to charge the stack from the second differential voltage level to a third differential voltage level so as to terminate the injection event. The method includes determining at least one engine parameter (e.g. common rail pressure) of the injection event prior to applying the charge current (I CHARGE ) to the actuator (4) and selecting the third differential voltage level in dependence on the at least one engine parameter.
Inventors:
Martin Paul Hardy
Andrew John Hargreaves
Christopher Andrew Goat
Michael peter kook
Jean-Francois, Berlemnon
Andrew John Hargreaves
Christopher Andrew Goat
Michael peter kook
Jean-Francois, Berlemnon
Application Number:
JP2007136148A
Publication Date:
September 22, 2010
Filing Date:
May 23, 2007
Export Citation:
Assignee:
Delphi Technologies Incorporated
International Classes:
F02M51/00; F02M51/06; F02M63/00
Domestic Patent References:
| JP2002535559A | ||||
| JP2004251272A |
Foreign References:
| WO2005071248A1 | ||||
| DE10311269A1 | ||||
| DE102004058971A1 |
Attorney, Agent or Firm:
Kazuo Shamoto
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Toru Miyamae
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Toru Miyamae