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1. (WO2017038517) ERROR DIAGNOSIS DEVICE FOR INTERNAL COMBUSTION ENGINE HAVING SUPERCHARGER

Pub. No.:    WO/2017/038517    International Application No.:    PCT/JP2016/074312
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Aug 23 01:59:59 CEST 2016
IPC: F01M 11/10
F01M 13/00
F02M 25/08
Applicants: DENSO CORPORATION
株式会社デンソー
Inventors: KATO Tatsunori
加藤 辰則
MAEGAWA Yoshinori
前川 佳範
Title: ERROR DIAGNOSIS DEVICE FOR INTERNAL COMBUSTION ENGINE HAVING SUPERCHARGER
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).