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1. IN2822/DELNP/2012 - "EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE"

Office
India
Application Number 2822/DELNP/2012
Application Date 02.04.2012
Publication Number 2822/DELNP/2012
Publication Date 24.07.2015
Grant Number 320019
Grant Date 06.09.2019
Publication Kind B
IPC
F02D
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
Applicants TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventors BISAIJI YUKI
YOSHIDA KOHEI
INOUE MIKIO
UMEMOTO KAZUHIRO
Title
(EN) "EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE"
Abstract
(EN)
In an internal combustion engine, inside of an engine exhaust passage, an upstream side air-fuel ratio sensor (23), a hydrocarbon feed valve (15), an exhaust purification catalyst (13), and a downstream side air-fuel ratio sensor (24) are arranged in this order from the upstream. At the time of engine operation, the injection amount of hydrocarbons from the hydrocarbon feed valve (15) is controlled based on the air-fuel ratio detected by the upstream side air-fuel ratio sensor (23) and the downstream side air-fuel ratio sensor (24) so that the amplitude of change of the concentration of hydrocarbons which flow into the exhaust purification catalyst (13) becomes within a predetermined range of amplitude.