Title:
ERROR DIAGNOSIS DEVICE FOR INTERNAL COMBUSTION ENGINE HAVING SUPERCHARGER
Document Type and Number:
WIPO Patent Application WO/2017/038517
Kind Code:
A1
Abstract:
A first upstream-side PCV pipe (34) and a second upstream-side pipe (35) are connected in parallel between a cylinder head of an engine (11) and the upstream side of a compressor (19) in an air intake pipe (12). A relative pressure sensor (36) is provided that detects the relative pressure inside the first upstream-side PCV pipe (34) relative to the pressure inside the second upstream-side PCV pipe (35). The absolute value of the relative pressure detected by the relative pressure sensor (36) is compared to a prescribed determination value. A determination is made that the upstream-side PCV pipes (34, 35) are error-free (i.e., normal), if the absolute value for the relative pressure is no more than the determination value. If the absolute value for the relative pressure is greater than the determination value, a determination is made that there is an error (e.g., a pipe detachment, a leak, or a pipe blockage) in the upstream-side PCV pipes (34, 35).
Inventors:
KATO TATSUNORI (JP)
MAEGAWA YOSHINORI (JP)
MAEGAWA YOSHINORI (JP)
Application Number:
PCT/JP2016/074312
Publication Date:
March 09, 2017
Filing Date:
August 22, 2016
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
F01M11/10; F01M13/00; F02M25/08
Foreign References:
| JP2013117176A | 2013-06-13 | |||
| JPH10184336A | 1998-07-14 | |||
| JP2007002838A | 2007-01-11 | |||
| JP2013194629A | 2013-09-30 | |||
| JP2010180835A | 2010-08-19 | |||
| JP2005061305A | 2005-03-10 | |||
| JPH0351121U | 1991-05-17 | |||
| US20140076249A1 | 2014-03-20 |
Attorney, Agent or Firm:
JIN Shunji (JP)
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