Exhaust gas is subjected to an exhaust gas purification device having an exhaust gas purification unit, and exhaust gas is desulfurized at predetermined times using an oxidation catalyst. A specified amount of carbon monoxide is added to the exhaust stream...

An internal combustion engine in an engine exhaust passage of which a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged. If the hydrocarbon feed valve (15) feeds hydrocarbons by a period of within 5 seconds, a reducing inte...

A fuel tank (12) is constructed such that a front flange portion (14A1) of a top surface plate (14A) of a second plate (14) extends furthermore to an outside in relation to a front surface plate (13B) of a first plate (13). As a result, a front surplus spa...

Inside an engine exhaust passage, in order from the upstream side, a hydrocarbon feed valve (16), oxidation catalyst (13), and exhaust purification catalyst (14) are arranged. A first NO X purification method which lowers the air-fuel ratio of the exhaust ...

It is an object of the present invention of this application to provide an engine device in which a DPF 1 is disposed, with high rigidity, in an engine 70 as one constituent part of the engine 70, the need of countermeasures against exhaust gas for each of...

The present invention provides a process and a device for regeneration of a nitrogen oxides storage catalyst arranged in the exhaust system of a diesel engine. The process comprises a first and a second regeneration strategy wherein the first regeneration ...

An NOx catalyst 17 for selectively reducing NOx in exhaust gas by adsorbing ammonia is provided at an exhaust system of an engine 1, ammonia or urea water is supplied to the NOx catalyst by reducing agent supplying means 29, a consumption amount of ammonia...

Carbon-containing suspended particulates in exhaust gas from an internal combustion engine (10) are collected by a heat-resistant filter (100), and are burned on the filter. It is determined whether there is a need to increase the temperature of the heat-r...

An emission control system for an internal combustion engine (1) is provided with a catalyst (4) disposed in an exhaust passage (3) of the internal combustion engine (1) for purifying an exhaust gas that enters the catalyst (4); engine operating state dete...