Title:
排気浄化装置
Document Type and Number:
Japanese Patent JP5620715
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To omit a labor such as replenishing urea water by eliminating the need of incidental facilities such as a urea water tank and a urea water feeding pipe by making it possible to apply a three way catalyst even in a diesel engine.SOLUTION: An exhaust emission control device has a low pressure loop 21, a high pressure loop 22, EGR valves 23, 24 (recirculation quantity controller) with which respective loops are equipped, the three-way catalyst 20 with which an exhaust pipe 4 is equipped, and a controller 27 for controlling the respective EGR valve 23, 24 so as to perform exhaust gas recirculation which is a base at an EGR rate suppressed to a degree in which black smoke is no generated when accelerating by the low pressure loop 21 and perform an additional exhaust gas recirculation to supplement of an insufficient EGR ratio by the high pressure loop 22, and suppress an air fuel ratio near a theoretical air fuel ratio, and is constituted such that the combustion can be established even near the theoretical air fuel ratio by raising the injection pressure of the fuel to the respective cylinders 19 to a predetermined height or more and by adjusting the injection hole diameter for injecting fuel such that the particles of the fuel injection can diffuse to the whole area of combustion chambers.
Inventors:
舟橋 博
堤 宗近
堤 宗近
Application Number:
JP2010114106A
Publication Date:
November 05, 2014
Filing Date:
May 18, 2010
Export Citation:
Assignee:
日野自動車株式会社
International Classes:
F01N3/24; B01D53/94; F01N3/023; F01N3/025; F01N3/029; F02D21/08; F02D41/04; F02D43/00; F02M25/07; F02M61/18
Attorney, Agent or Firm:
Patent business corporation Yamada patent firm