An abnormality diagnosis device includes a partially-plugged filter, a pressure difference sensor, a PM sensor, a first estimation portion estimating a diagnosis amount of PM from the partially-plugged filter, according to a running condition of the internal combustion engine, a second estimation portion estimating the diagnosis amount of PM according to an output of the pressure difference sensor, a third estimation portion estimating the diagnosis amount of PM according to an output of the PM sensor, and an abnormality diagnosis portion distinctly determining an abnormality of the internal combustion engine, an abnormality of the partially-plugged filter, and an abnormality of the PM sensor by comparing the diagnosis amount of PM estimated by the first estimation portion, the diagnosis amount of PM estimated by the second estimation portion, and the diagnosis amount of PM estimated by the third estimation portion.

Provided are an exhaust gas purifying catalyst having high catalytic activity enabling combustion of PM at low temperatures and free from any risk of dispersal of metal elements arousing concern about environmental load, an exhaust gas purification device and filter having a high combustion efficiency of PM, and a method for producing the catalyst. An exhaust gas purifying catalyst contains: an oxide containing at least one element (A) selected from alkali metals and alkaline earth metals and at least one element (B) selected from Zr, Si, Al, and Ti; and a cesium salt.

An internal combustion engine includes a cylinder, a piston, a crankshaft, a cylinder igniter, an intake passage, a fuel supplier, an exhaust passage, a catalytic converter disposed in the exhaust passage, an exhaust igniter that is disposed upstream of the catalytic converter in the exhaust passage and s generates a spark in the interior of the exhaust passage, and a controller that controls a preheating process for heating the catalytic converter by controlling supply of the air-fuel mixture to the exhaust passage and ignition of the air-fuel mixture by the exhaust igniter. The internal volume of the exhaust passage from the cylinder to an installation position of the exhaust igniter is equal to or less than a volume of the air-fuel mixture discharged from the cylinder in one exhaust stroke in the exhaust passage.

This NOx reduction control method is for an exhaust gas aftertreatment device having an oxidation catalyst and an LNT catalyst which are disposed in an exhaust pipe and repeating an adsorption or occlusion of NOx which is executed when an air-fuel ratio is in a lean state and a reduction of NOx which is executed when the air-fuel ratio is in a rich state, the method including executing a post-injection or an exhaust pipe injection and causing HC to be adsorbed in the oxidation catalyst when an exhaust gas temperature is low, and causing the HC which is adsorbed in the oxidation catalyst to be desorbed and reducing an adsorbed NOx in the LNT catalyst by raising the exhaust gas temperature during the rich state.

Provided are an exhaust gas purifying catalyst having high catalytic activity enabling combustion of PM at low temperatures and free from any risk of dispersal of metal elements arousing concern about environmental load, an exhaust gas purification device and filter having a high combustion efficiency of PM, and a method for producing the catalyst. An exhaust gas purifying catalyst contains: an oxide containing at least one element (A) selected from alkali metals and alkaline earth metals and at least one element (B) selected from Zr, Si, Al, and Ti; and a cesium salt.

A burner for an exhaust gas tract that can be flowed through by exhaust gas of an internal combustion engine includes a combustion chamber in which a mixture of air and liquid fuel is to be ignited and combusted and an inner swirl chamber that can be flowed through by a first part of the air and causes a turbulent flow of the first part of the air. The swirl chamber has a first outflow opening that can be flowed through by the first part of the air flowing through the inner swirl chamber and via which the first part of the air can be removed from the inner swirl chamber. The burner further includes an introduction element that can be flowed through by the liquid fuel and via which the fuel can be introduced into the inner swirl chamber.

A system for removing effluents from the exhaust gases of an engine includes an auxiliary occupational emissions device positioned downstream of a vehicle-regulated emission abatement system. One or more glow plugs is positioned between the vehicle-regulated emission abatement system and the auxiliary occupational emissions device. The glow plugs are operable to heat exhaust gases exiting the vehicle-regulated emission abatement system prior to advancement into the auxiliary occupational emissions device. A method of lighting off an auxiliary occupational emissions device is also disclosed.

An operation control apparatus for an internal combustion engine includes: an exhaust emission purifier; a fuel supplying valve for supplying fuel to an exhaust passage; ignition means for igniting the fuel supplied; a warm up determining section for determining whether or not the purifier need be warmed; an exhaust heating determining section for determining whether or not the engine is in an operational state in which the fuel should be ignited and burned; an exhaust heating predicting section for predicting the transition from the operational state in which the fuel should not be ignited and burned to an operational state in which the fuel should be ignited and burned; and a heat generation temperature setting section for setting the temperature of a heating portion of the ignition means based on the result by the heating determining section and the predicting section.

A support unit for supporting a heating conductor of an exhaust gas heater on a carrier structure includes a supporting sleeve extending in the direction of a longitudinal axis and surrounding the longitudinal axis, a supporting pin having a sleeve connecting area extending in the supporting sleeve and an exhaust gas heater connecting area projecting beyond the supporting sleeve, wherein the supporting pin, at least in the area of its sleeve connecting area, and/or the supporting sleeve, on an inner surface surrounding the sleeve connecting area of the supporting pin, is coated with insulating material, and wherein the sleeve connecting area is held in the supporting sleeve by a force fit.

A system for reducing internal combustion engine emissions includes an engine, a catalytic converter fluidly connected to a combustion chamber via an exhaust line, a glow plug positioned along the exhaust line between the catalytic converter and the combustion chamber, and a flame accelerator, without a fluid connection to a separate fuel supply. Methods of using the system include igniting a mixture of air and fuel in the exhaust line using the glow plug, producing an amount of heated combustion gas.