A vehicle engine system includes an internal combustion engine, an air induction system configured to supply intake air to the internal combustion engine, and an evaporative emissions control (EVAP) system is configured to selectively supply purge fuel vapor to the EHC for subsequent combustion and rapid heating to a predetermined catalyst light-off temperature. The system additionally includes a booster configured to charge the intake air, and an engine bypass conduit fluidly coupled between the booster and the exhaust aftertreatment system. When the internal combustion engine is off, the booster selectively supplies a flow of intake air through the engine bypass conduit to the exhaust aftertreatment system. The flow of intake air draws purge fuel vapor from the EVAP system into the exhaust aftertreatment system.

A system and method for treating turbine exhaust gas includes an industrial process turbine exhaust gas discharge structure, a catalytic turbine exhaust gas treatment device positioned at least partially within the industrial process turbine exhaust gas discharge structure, a pump, and at least two heat exchangers. The catalytic turbine exhaust gas treatment device is positioned at least partially within the industrial process turbine exhaust gas discharge structure. A first heat exchanger is positioned at least partially within the industrial process turbine exhaust gas discharge section structure and upstream of the catalytic turbine exhaust gas treatment device to remove heat from an the turbine exhaust gas by transferring heat to a working fluid. A second heat exchanger removes heat from the working fluid gained at the first heat exchanger. The pump drives the working fluid between the first and second heat exchanger.

The present invention relates to a method for controlling an internal combustion engine arrangement (100) connected to an exhaust gas aftertreatment system (200), wherein the method is arranged to control a gas heating device ( 122), as well as a gas feeding arrangement to direct a flow of intake air through the exhaust gas recirculation conduit (112) from the intake system to the exhaust system, the flow of intake air being directed through the gas heating device before the intake air enters the exhaust gas aftertreatment system, in response to determining a requested start of the internal combustion engine to heat the aftertreatment system before starting the engine.

The invention relates to a diagnostic method for checking the functionality of a component for the exhaust-gas aftertreatment of an internal combustion engine. For this purpose, in an internal combustion engine, a secondary air supply is provided by means of which an excess of oxygen can be generated in the exhaust gas channel essentially independently of the operating conditions of the internal combustion engine, and wherein said excess of oxygen is utilized for the measurement of an oxygen storage capacity of the component or of a signal change at the component. It is provided that the component is subsequently subjected to a substoichiometric exhaust gas in order that the oxygen release capacity or the signal change upon a change from superstoichiometric exhaust gas to a substoichiometric exhaust gas is also taken into consideration in the diagnosis. The invention also relates to a device for exhaust-gas aftertreatment, which is designed to be able to carry out a method of said type.

A regeneration system includes a first module, a mode selection module and an adsorber regeneration control (ARC) module. The first module monitors at least one of (i) a temperature of a first catalyst of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the first catalyst. The mode selection module is configured to select an adsorber regeneration mode and generates a mode signal based on the at least one of the temperature and the active catalyst volume. The ARC module at least one of activates an air pump and cranks the engine to regenerate an adsorber of the catalyst assembly while the engine is deactivated based on the mode signal.

Methods and systems are provided for routing secondary air to engine an exhaust system during a cold-start condition to reduce tail pipe emissions. In one example, a method may include operating a pump of an evaporative leak check module (ELCM) in a positive pressure mode and routing pressurized air to the exhaust passage upstream of an exhaust catalyst via an air conduit housing a first valve.

An engine assembly and a method of control thereof is provided. The engine assembly comprises: an exhaust gas aftertreatment device having an inlet for receiving exhaust gases leaving an engine; a heater for selectively heating gases at or upstream of the exhaust gas aftertreatment device; an air moving device for driving a flow of gases into the inlet of the exhaust gas aftertreatment device when the engine is in a non-running condition; and a controller configured to, prior to the engine being started: operate the heater to heat gases at or upstream of the inlet; and operate the air moving device to drive a flow of gases into the inlet to thereby heat the exhaust gas treatment device.

An air intake and exhaust system for a marine engine having an intake manifold and an exhaust manifold includes an air compressor configured to compress ambient air into compressed air and a catalytic converter assembly configured to convert pollutants in an exhaust gas stream received from the exhaust manifold. The air compressor is configured to be fluidly coupled to the intake manifold of the engine for directing at least a first portion of the compressed air to the intake manifold of the engine. The air compressor is also selectively fluidly coupled to the catalytic converter assembly for selectively directing a second portion of the compressed air into the exhaust gas stream at a secondary air injection location at or upstream of the catalytic converter assembly.

A method is disclosed for operating an internal combustion engine which comprises a primary air system for providing fresh air and a secondary air system. The secondary air system is configured to branch off secondary air from the primary air system and blow it into an exhaust gas duct. The secondary air system has a compressor for feeding the secondary air and a secondary air valve for shutting off or enabling the blowing in of secondary air. The method includes (i) activating the compressor while the secondary air valve is kept closed, (ii) determining whether compressor surging is occurring or is directly imminent, (iii) sensing at least one sensor signal if compressor surging is occurring or is directly imminent, and (iv) determining whether there is a leak in the secondary air system, on the basis of the sensed sensor signal.

A method is disclosed for operating an internal combustion engine which comprises a primary air system for providing fresh air and a secondary air system. The secondary air system is configured to branch off secondary air from the primary air system and blow it into an exhaust gas duct. The secondary air system has a compressor for feeding the secondary air and a secondary air valve for shutting off or enabling the blowing in of secondary air. The method includes (i) activating the compressor while the secondary air valve is kept closed, (ii) determining whether compressor surging is occurring or is directly imminent, (iii) sensing at least one sensor signal if compressor surging is occurring or is directly imminent, and (iv) determining whether there is a leak in the secondary air system, on the basis of the sensed sensor signal.