Title:
内燃機関の制御装置
Document Type and Number:
Japanese Patent JP6879115
Kind Code:
B2
Abstract:
A controller for an internal combustion engine includes a processing circuit that performs a dither control process on condition that a temperature increase request of a catalyst is made. The processing circuit operates fuel injection valves so that during the dither control process, one or more cylinders are lean combustion cylinders in a first period and another one or more cylinders are rich combustion cylinders and so that the average value of an exhaust gas-fuel ratio is a target air-fuel ratio in a second period including the first period. The dither control process is restricted in a manner that, on condition that the rich process is performed, the degree of richening of the richest exhaust gas-fuel ratio of exhaust gas-fuel ratios in the cylinders is reduced.
Inventors:
Yuki Nose
Keiichi Akagi
Shogenji Yoshiyuki
Eiji Ikuta
Keiichi Akagi
Shogenji Yoshiyuki
Eiji Ikuta
Application Number:
JP2017155399A
Publication Date:
June 02, 2021
Filing Date:
August 10, 2017
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02D41/02; F01N3/20; F02D13/02; F02D41/04; F02D43/00
Domestic Patent References:
| JP2017057735A | ||||
| JP2017008770A | ||||
| JP2006322335A | ||||
| JP2012057492A | ||||
| JP2014025355A | ||||
| JP2008075492A |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda