Title:
INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2014/045881
Kind Code:
A1
Abstract:
Provided is an internal combustion engine that can easily detect the deterioration state of a catalyst using temperature sensors. An upstream temperature sensor (21) and a downstream temperature sensor (22) are provided upstream and downstream from a three-way catalyst (2) in a gas engine (1) comprising said three-way catalyst (2), and said gas engine (1) is equipped with a control unit (10) that detects deterioration of the three-way catalyst (2) on the basis of whether the temperature difference (ΔT) between the upstream temperature sensor (21) and the downstream temperature sensor (22) is equal to or less than a predetermined value. The control unit (10) detects deterioration of the catalyst by applying a control map indicating the correlation between the predetermined value and the rotational speed, load, excess air ratio, and ignition timing occurring in the gas engine (1) to a measured temperature difference in order to determine whether said measured temperature difference is equal to or lower than the predetermined value.
Inventors:
NAKAZONO TORU (JP)
RAIHAN KHANDOKER ABU (JP)
OKADA HIROYUKI (JP)
RAIHAN KHANDOKER ABU (JP)
OKADA HIROYUKI (JP)
Application Number:
PCT/JP2013/073913
Publication Date:
March 27, 2014
Filing Date:
September 05, 2013
Export Citation:
Assignee:
YANMAR CO LTD (JP)
International Classes:
F01N3/20; B01D53/94; F02D45/00
Foreign References:
| JP2003106140A | 2003-04-09 | |||
| JP2010209725A | 2010-09-24 | |||
| JPH01216009A | 1989-08-30 |
Attorney, Agent or Firm:
ARC PATENT ATTORNEYS' OFFICE (JP)
Patent business corporation ARC PATENT ATTORNEYS' OFFICE (JP)
Patent business corporation ARC PATENT ATTORNEYS' OFFICE (JP)
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