Title:
FUEL INJECTION VALVE DRIVING DEVICE
Document Type and Number:
Japanese Patent JP3885283
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve responsiveness of a fuel injection valve using a piezoelectric element and a magnetostrictive element.
SOLUTION: A fuel injection valve is provided with a nozzle hole 1a opened/ closed by a needle valve 2 displaced in response to differential pressure between a fuel pressure chamber 3 and a differential pressure chamber 8, a return spring 4 energizing the needle valve 2 in a closing direction, and a piston 11 regulating the pressure of the differential pressure chamber 8 in response to expansion of a piezoelectric actuator. A controller 5 sending a valve opening signal and a valve closing signal selectively to the piezoelectric actuator 10 according to the operating state of an engine selects valve opening start voltage V1 for driving the piezoelectric actuator further in a valve opening direction from a valve opening maintained state at the beginning of valve opening while selecting valve opening maintaining voltage V2 that can maintain a valve opened state in the latter period of valve opening.
Inventors:
Masahiko Katsu
Masahiko Iizumi
Takayuki Arai
Takashi Fukuda
Masahiko Iizumi
Takayuki Arai
Takashi Fukuda
Application Number:
JP11952997A
Publication Date:
February 21, 2007
Filing Date:
May 09, 1997
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02M51/00; F02M51/06; F02M47/00; (IPC1-7): F02M51/06; F02M51/00
Domestic Patent References:
| JP7189853A | ||||
| JP2185649A | ||||
| JP8093591A | ||||
| JP64080751A | ||||
| JP52125932A | ||||
| JP55083231U | ||||
| JP7103044A | ||||
| JP8258595A | ||||
| JP6264778A | ||||
| JP6146977A |
Attorney, Agent or Firm:
Masaki Goto
Yoshio Matsuda
Yoshio Matsuda
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