A power-train controlling apparatus controls a power train of an engine electric hybrid vehicle. The power train is provided with an engine, a catalytic converter, an oxygen-level sensor, an engaging element, and an electric rotating machine. The power-train controlling apparatus includes a fuel injection controller, a catalyst diagnosing unit, and an engaging-element controller. The fuel injection controller stops fuel injection to the engine during coasting of the vehicle while the engaging element is engaged, introduces oxygen to the catalytic converter, and resumes the fuel injection in a fuel-rich state while the vehicle is running. The catalyst diagnosing unit diagnoses the catalytic converter after the resuming of the fuel injection. The engaging-element controller prohibits transition of the engaging element to a released state during a period between the stopping of the fuel injection and completion of the diagnosing of the catalytic converter.

A method of controlling an oxygen purge of a three-way catalyst (TWC) may include: rapidly adjusting, by a controller, an air-fuel ratio (AFR) at an upstream of the TWC to a target AFR when the oxygen purge of the TWC after a fuel cut-off is performed; and maintaining the target AFR until an oxygen purge finish time has passed. According to the method, concentration of NOx slipped from the TWC after the oxygen purge may be reduced.

Vehicle exhaust system uses delta pressure based estimation of accumulated soot within a diesel particulate filter. The exhaust system has a diesel oxidation catalyst and a diesel particulate filter. A fuel injector is connected upstream from the diesel oxidation catalyst and the diesel particulate filter. A delta pressure sensor measures difference in pressure at inlet and outlet of the diesel particulate filter. A controller determines when to regenerate the diesel particulate filter based on an estimated amount of soot. The controller, in a first regeneration mode, causes the fuel injector to inject fuel at a first rate into the exhaust stream, and to re-evaluate amount of soot accumulated within the diesel particulate filter under increased volumetric flow. The controller, in a second regeneration mode, causes the fuel injector to inject fuel at a second rate into the exhaust stream in order to combust soot trapped in the diesel particulate filter.

A cleaning tool for an aftertreatment device including a vacuum attachment port having an exterior end and an interior end, a vacuum extension extending from the interior end of the vacuum attachment port, wherein the vacuum extension has a concave inner surface adapted to engage an end of the aftertreatment device, wherein the concave inner surface of the vacuum extension is adapted to secure the cleaning tool to the end of the aftertreatment device when a vacuum is applied from the exterior end of the vacuum attachment port by having the concave inner surface provide a vacuum sealing engagement with the end of the aftertreatment device when the vacuum is applied from the exterior end of the vacuum attachment port.

A power-train controlling apparatus controls a power train of an engine electric hybrid vehicle. The power train is provided with an engine, a catalytic converter, an oxygen-level sensor, an engaging element, and an electric rotating machine. The power-train controlling apparatus includes a fuel injection controller, a catalyst diagnosing unit, and an engaging-element controller. The fuel injection controller stops fuel injection to the engine during coasting of the vehicle while the engaging element is engaged, introduces oxygen to the catalytic converter, and resumes the fuel injection in a fuel-rich state while the vehicle is running. The catalyst diagnosing unit diagnoses the catalytic converter after the resuming of the fuel injection. The engaging-element controller prohibits transition of the engaging element to a released state during a period between the stopping of the fuel injection and completion of the diagnosing of the catalytic converter.

A vehicle includes an engine, a fueling system, an exhaust assembly, and a controller. The fueling system controls fuel to the engine. The exhaust assembly releases combustion gas from the engine and includes at least one sensor and a catalytic converter. The controller is configured to control the engine, the fueling system and the exhaust assembly. The controller evaluates engine state and an output from the at least one sensor and commands a fueling strategy to control an oxygen storage capacity of the catalytic converter based on the engine state and output from the at least one sensor.

A vehicle includes an engine, a fueling system, an exhaust assembly, and a controller. The fueling system controls fuel to the engine. The exhaust assembly releases combustion gas from the engine and includes at least one sensor and a catalytic converter. The controller is configured to control the engine, the fueling system and the exhaust assembly. The controller evaluates engine state and an output from the at least one sensor and commands a fueling strategy to control an oxygen storage capacity of the catalytic converter based on the engine state and output from the at least one sensor.

An exhaust after treatment system for a vehicle includes an exhaust outlet pipe, having a first end that is connectable to a vehicle engine, for receiving exhaust gases from said vehicle engine, and having an outlet opening at a second end, arranged to eject the outlet gases, a catalytic converter, connected to the exhaust outlet pipe; and an electric heater element which is in heat conducting contact with the catalytic converter and adapted for pre-heating the catalytic converter. The heater element is positioned downstream of the catalytic converter with respect to the first end. Upon the vehicle being started, the heater element is switched on and gases are flowed from the second end, in the direction of the first end of the exhaust outlet pipe, through the catalytic converter for a pre-set period of time prior to passing exhaust gases from the engine towards the outlet opening at the second end.

A system that may include an exhaust gas source that provides exhaust gas pollutants, a primary catalytic converter coupled downstream of the exhaust gas source, and an adsorption unit, configured to adsorb exhaust gas pollutants. The adsorption unit may be coupled downstream of the exhaust gas source. A process that may include introducing exhaust gas comprising exhaust gas pollutants into a system that includes an adsorption unit, such that the exhaust gas may flow through the adsorption unit and the exhaust gas pollutants may be adsorbed into an adsorption media in the adsorption unit as adsorbed exhaust gas pollutants. A depleted exhaust gas may pass from the adsorption unit.

An engine system includes: an engine including a plurality of combustion chambers generating driving torque by combustion of fuel; an exhaust gas purification apparatus installed at an exhaust line in which exhaust gas exhausted from the combustion chambers flows; a bypass line branched from the exhaust line at an upstream side of the exhaust gas purification apparatus and joining the exhaust line at a downstream side of the exhaust gas purification apparatus so that the exhaust gas flowing in the exhaust line bypasses the exhaust gas purification apparatus; and a bypass valve installed at the bypass line.