A regeneration system for a vehicle includes: a particulate module configured to determine an amount of particulate trapped within a particulate filter, the particulate filter configured to filter particulate from exhaust output from an engine; and a regeneration control module configured to, in response to a determination that the amount of particulate trapped within the particulate filter is at least a predetermined amount: close a wastegate of a turbocharger; and open an EGR valve connected (a) to an intake system of the engine downstream of the turbocharger and (b) to upstream of the particulate filter, the closing of the wastegate and the opening of the EGR valve flowing air from (a) the intake system to (b) upstream of the particulate filter through the EGR valve without the air entering the engine.

A work vehicle including a DPF system configured to collect particulate matter contained in exhaust gas from an engine; an SCR system configured to add, to the exhaust gas from the engine a reductant stored in a reductant storage tank to reduce nitrogen oxide contained in the exhaust gas; and a control unit capable of executing a DPF renewal control whereby particulate matter collected and deposited in the DPF system is burned and removed by using the exhaust gas from the engine and an SCR reference operation restricting control to restrict an operating condition of the engine. The SCR reference operation restricting control is executed when an amount of the reductant stored in the reductant storage tank is a preset amount or less, or when an abnormality occurs in the SCR system. The control unit preferentially executes the DPF renewal control over the SCR reference operation restricting control.

An object of the present invention is to provide an exhaust gas purification system which exhibits high exhaust gas purification performance. The present invention provides an exhaust gas purification system including: a carrier containing aluminum oxide; an exhaust gas purification device including a catalyst provided on the carrier and containing gallium, and connected to an internal combustion engine; and a system connected to the exhaust gas purification device for increasing an oxygen concentration. The system for increasing an oxygen concentration provides an oxygen concentration higher than that of a post combusted gas of the internal combustion engine.

A motor vehicle including an exhaust system downstream of an internal combustion engine and which comprises several exhaust gas aftertreatment devices for cleaning the exhaust gas from the internal combustion engine, wherein the exhaust system includes an SCR catalytic converter and at least one additional catalytic converter, wherein the additional catalytic converter is designed as an NOx storage catalytic converter or an oxidation catalytic converter, wherein a control device is provided for controlling at least one operating component of the motor vehicle influencing the temperature of the exhaust gas, wherein the control device is designed to control the operating component for setting the temperature of the exhaust gas depending on at least route information dependent on an expected travel distance and conversion information relating to a temperature-dependent pollutant conversion rate of at least one exhaust gas aftertreatment device of the exhaust system.

Methods and systems are provided for partially regenerating a lean NO.sub.x trap in response to an engine shutdown request. In one example, an engine shutdown is delayed so that a low-temperature storing region of the lean NO.sub.x trap is regenerated without regenerating a high-temperature storing region of the lean NO.sub.x trap. A battery charge is replenished during the shutdown, wherein the charge may be consumed during a subsequent engine operation.

A control device for an internal combustion engine includes processing circuitry. The processing circuitry is configured to execute a purging process that draws the fuel vapor trapped in the canister into the intake passage by controlling the purge valve, a fuel feeding process that feeds the air-fuel mixture, which includes the fuel supplied to the cylinder, to the exhaust passage without burning the air-fuel mixture in the cylinder, and a fuel supply process that supplies fuel to the cylinder when the fuel feeding process is being performed. The processing circuitry is further configured to perform the fuel supply process by performing the purging process.

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.

A work vehicle including a DPF system configured to collect particulate matter contained in exhaust gas from an engine; an SCR system configured to add, to the exhaust gas from the engine, a reductant stored in a reductant storage tank to reduce nitrogen oxide contained in the exhaust gas; and a control unit capable of executing a DPF renewal control whereby particulate matter collected and deposited in the DPF system is burned and removed by using the exhaust gas from the engine and an SCR reference operation restricting control to restrict an operating condition of the engine. The SCR reference operation restricting control is executed when an amount of the reductant stored in the reductant storage tank is a preset amount or less, or when an abnormality occurs in the SCR system. The control unit preferentially executes the DPF renewal control over the SCR reference operation restricting control.

A combined engine system is disclosed which may help to meet electrical power demand of a common load that can vary in an unpredictable manner. The system comprises at least one primary engine and one or more secondary engines. An after-treatment system is connected to the engines to receive exhaust flow from each of the engines. A controller is configured to operate the system in a first operating mode when only the primary engine is running and a second operating mode when the secondary engines are run together with the primary engine. Exhaust flows from each of the engines are passed through the after-treatment system which allows the after-treatment system to be heated by the exhaust flow of the primary engine before receiving exhaust flows from the secondary engines.

Systems and methods for removing deposit in an aftertreatment system for an engine are disclosed herein. The method comprises determining an amount of deposits accumulated in the aftertreatment system, determining combustion targets for the engine in response to determining the amount of deposits exceeds a deposit threshold, and modulating an air mass flow for the engine based on the determined combustion targets. The air mass flow can be modulated by changing the position of the wastegate or the geometry of the variable geometry turbine (VGT).