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Title:
DEVICE FOR DETECTING INJECTOR STATE
Document Type and Number:
Japanese Patent JP2012246821
Kind Code:
A
Abstract:

To provide an injector state detection device for detecting an injector state by a simple configuration.

The injector state detection device 60 includes: an AC power supply 61; an AC current supply means 62 for superimposing an AC current on a DC current supplied to an injector 11; an extraction unit 63 for detecting and extracting an AC current component from a current flowing through a resistance R; an envelope acquisition unit 64 for detecting an envelope of a peak value of the AC current extracted by the extraction unit 63 and for acquiring the envelope; and a state detection unit 65 for measuring an amount of movement of a needle 22, based on the envelope acquired in the envelope acquisition unit 64.


Inventors:
Kida, Yoshihiro
Fukagawa, Yasuhiro
Kato, Takehiko
Sugimura, Taro
Application Number:
JP2011000118695
Publication Date:
December 13, 2012
Filing Date:
May 27, 2011
Export Citation:
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Assignee:
NIPPON SOKEN INC
DENSO CORP
International Classes:
F02M65/00; F02D41/20; F02M51/06
Domestic Patent References:
JP2760072B21998-05-28
JPH10227250A1998-08-25
JPH11159422A1999-06-15
JP2011004280A2011-01-06
Attorney, Agent or Firm:
田下 明人
立石 克彦