Title:
EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2016145543
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine that enables a reduction in fuel consumption while maintaining an NOelimination ratio at a high level.SOLUTION: An exhaust emission control device includes an exhaust purification catalyst disposed downstream of a hydrocarbon supply valve and a fuel supply device for supplying fuel to the hydrocarbon supply valve, and is formed to perform operation control for supplying hydrocarbon from the hydrocarbon supply valve so that the amplitude of a concentration change of the hydrocarbon flowing into the exhaust purification catalyst during operation of an engine becomes an amplitude within a predetermined range and the concentration of the hydrocarbon is in a cycle within a predetermined range. When the operation control is performed, pressure of fuel to be supplied to the hydrocarbon supply valve is set based on total fuel consumption of the consumption of fuel injected from the hydrocarbon supply valve and fuel consumption for eliminating NO.SELECTED DRAWING: Figure 25
Inventors:
UMEMOTO TOSHITAKE
MORI TOSHIHIRO
MORI TOSHIHIRO
Application Number:
JP2015022631A
Publication Date:
August 12, 2016
Filing Date:
February 06, 2015
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F01N3/36; B01D53/86; F01N3/08; F01N3/28
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Shinji Mitsuhashi
Tatsuki Sone
Yuichi Morimoto
Jun Tsuruta
Tetsuro Shimada
Shinji Mitsuhashi
Tatsuki Sone
Yuichi Morimoto