The sulfur concentration judging system of an internal-combustion engine

Japanese Patent JP6036786

B2

A concentration of sulfur components contained in fuel is determined, without adding any special sensor for determining the sulfur concentration of the fuel. To this end, a sulfur concentration determination system for an internal combustion engine is provided with an exhaust gas purification device including an oxidation catalyst disposed in an exhaust passage, and a supply device for supplying fuel to exhaust gas flowing into the exhaust gas purification device, wherein after the end of poisoning elimination processing of the oxidation catalyst, fuel supply processing is carried out in which the fuel is supplied to the exhaust gas purification device in such a manner that an amount of fuel supplied to the exhaust gas purification device per unit time becomes constant, and the concentration of sulfur components contained in the fuel is determined by using as a parameter a period of time (an oxidation reaction period of time) required from a starting point in time of the fuel supply processing until the temperature of the oxidation catalyst drops to an initial temperature or below.

Daichi Imai
Hirooka Nishioka

JP2014212811A

November 30, 2016

October 17, 2014

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TOYOTA JIDOSHA KABUSHIKI KAISHA

F01N3/20; B01D53/96; F01N3/24; F01N3/36; F01N11/00

JP2013227887A
JP2010185448A
JP201368089A
JP200174727A
JP200018025A
JP893456A
JP201267636A
JP2012246842A
JP2012219803A
JP2008255952A
JP2004232576A
JP2009121414A

US20030134425

Yoshiyuki Kawaguchi
Kazunobu Sera
Akira Hirakawa
Takehiko Sekine
Katsuhiko Imahori
Fuminori Miyashita

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