Title:
ENGINE UNIT AND VEHICLE
Document Type and Number:
Japanese Patent JP2017150307
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an engine unit capable of enhancing its exhaust emission control performance, and to provide a vehicle.SOLUTION: The engine unit includes an exhaust passage for exhaust gas to flow thereinto from a single-cylinder four-stroke engine, a main catalyst having the highest emission control ability in the exhaust passage, an upstream oxygen detection member arranged in a section of the exhaust passage from an exhaust port of the single-cylinder four-stroke engine to the upstream end of the main catalyst, at a position nearer the exhaust port than the main catalyst, and at least partly exposed to the exhaust gas exhausted only from a single combustion chamber of the single-cylinder four-stroke engine, for detecting oxygen, a downstream oxygen detection member arranged in the exhaust passage downstream of the downstream end of the main catalyst, and at least partly exposed to the exhaust gas exhausted only from the single combustion chamber of the single-cylinder four-stroke engine, for detecting oxygen, and a control part for performing combustion control of the single-cylinder four-stroke engine on the basis of the detection result of the upstream oxygen detection member and the detection result of the downstream oxygen detection member.SELECTED DRAWING: Figure 5
Inventors:
NISHIGAKI MASATAKA
ARAKI YUJI
ISHIZAWA KAZUHIRO
WAKIMURA MAKOTO
ARAKI YUJI
ISHIZAWA KAZUHIRO
WAKIMURA MAKOTO
Application Number:
JP2014138367A
Publication Date:
August 31, 2017
Filing Date:
July 04, 2014
Export Citation:
Assignee:
YAMAHA MOTOR CO LTD
International Classes:
F01N3/00; F01N3/28; F01N13/00; F02D35/00
Attorney, Agent or Firm:
Koichi Washida