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Title:
METHOD FOR DIAGNOSING ERROR OF PRESSURE SENSOR AND COMMON RAIL TYPE FUEL INJECTION CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/007772
Kind Code:
A1
Abstract:
In order to make it possible to perform a faster and more reliable diagnosis of an error of a pressure sensor than the prior art by a simple structure and without providing a dedicated circuit for the error analysis or additional components, if a vehicle is in a no load running state (S202) and when currents which are supplied to a pressure regulation valve (12) and which are required to set a rail pressure to a plurality of predetermined diagnosis pressures are out of a predetermined allowable range more than a predetermined number of times (S208 to S212), an error warning is given as an error of a pressure sensor (11) (S220, S222). The predetermined allowable range is determined with reference to a reference correlation which is obtained by correcting a standard correlation which represents a correlation between a current supplied to a preset standard pressure regulation valve and the rail pressure, on the basis of current supply characteristics of an actual pressure regulation valve (12).

Inventors:
KISHI ATSUSHI (JP)
Application Number:
PCT/JP2010/061820
Publication Date:
January 20, 2011
Filing Date:
July 13, 2010
Export Citation:
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Assignee:
BOSCH CORP (JP)
KISHI ATSUSHI (JP)
International Classes:
F02M55/02; F02D29/02; F02D45/00; F02M51/00; F02M65/00
Foreign References:
JPH11506813A1999-06-15
JP2005273571A2005-10-06
JP2005248885A2005-09-15
JPH10227268A1998-08-25
Attorney, Agent or Firm:
ABIKO Tsutomu (JP)
Tsutomu Abiko (JP)
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