Title:
ABNORMALITY DIAGNOSIS DEVICE OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2020186703
Kind Code:
A
Abstract:
To provide an abnormality diagnosis device of an internal combustion engine capable of detecting occurrence of clogging in an intake-side passage part.SOLUTION: An abnormality diagnosis device 50 is applied to an internal combustion engine including a supercharger 11, a blow-by gas passage 31, and a PCV pressure sensor 35. The abnormality diagnosis device 50 includes an increase determination portion 51 for determining whether or not a pressure in the blow-by gas passage 31 is increased by increasing an amount of intake air on the basis of a PCV pressure sensor value detected by the PCV pressure sensor, and a clogging diagnosis portion 52 for diagnosing occurrence of clogging in an intake-side passage part of the blow-by gas passage 31, when the increase of the pressure in the blow-by gas passage 31 by increase of the amount of intake air under a situation that the intake air is pressurized by the supercharger 11, is determined.SELECTED DRAWING: Figure 2
Inventors:
TSUJI TOMOYUKI
OKUBO NAOYA
OKUBO NAOYA
Application Number:
JP2019093062A
Publication Date:
November 19, 2020
Filing Date:
May 16, 2019
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F01M13/00; F02B77/08
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda