Title:
FUEL FILTER DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD
Document Type and Number:
WIPO Patent Application WO/2014/132508
Kind Code:
A1
Abstract:
A fuel filter diagnostic device having: a negative pressure sensor that detects the negative fuel pressure downstream from a fuel filter provided in a fuel pipe connecting a fuel tank and a fuel pump; an atmospheric pressure sensor that detects the atmospheric pressure; and a control unit that reads the respective output signals from the negative pressure sensor and the atmospheric pressure sensor, and determines whether the fuel filter has become clogged. The control unit sets a first threshold value in accordance with the atmospheric pressure, and when the fuel pressure obtained by adding the negative fuel pressure and the atmospheric pressure is equal to or less than the first threshold value, the control unit determines that the fuel filter has become clogged.
Inventors:
TAKAMURA YASUHARU (JP)
Application Number:
PCT/JP2013/081956
Publication Date:
September 04, 2014
Filing Date:
November 27, 2013
Export Citation:
Assignee:
NISSAN MOTOR LIGHT TRUCK CO (JP)
International Classes:
F02D45/00; F02M37/40
Foreign References:
| JP2010255517A | 2010-11-11 | |||
| JPS5935676U | 1984-03-06 | |||
| JP2006283724A | 2006-10-19 |
Attorney, Agent or Firm:
SASAJIMA, Fujio (JP)
Sasajima Wealth 2 male (JP)
Sasajima Wealth 2 male (JP)
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