Disclosed is a method of preventing fouling of an exhaust gas recirculation (EGR) cooler of an engine including after a vehicle including the engine reaches a reference mileage, operating, by a controller, an exhaust brake device of the vehicle and blocking the discharge of exhaust gas of the engine, after the exhaust brake device is operated, closing, by the controller, an EGR valve that provides the exhaust gas of the engine to an EGR cooler of an EGR system of the engine, and before the operation of the exhaust brake device is stopped, removing, by the controller, a deposition layer generated in the EGR cooler, by opening the EGR valve.

Disclosed is a method of preventing fouling of an exhaust gas recirculation (EGR) cooler of an engine including after a vehicle including the engine reaches a reference mileage, operating, by a controller, an exhaust brake device of the vehicle and blocking the discharge of exhaust gas of the engine, after the exhaust brake device is operated, closing, by the controller, an EGR valve that provides the exhaust gas of the engine to an EGR cooler of an EGR system of the engine, and before the operation of the exhaust brake device is stopped, removing, by the controller, a deposition layer generated in the EGR cooler, by opening the EGR valve.

An exhaust gas recirculation structure includes an EGR cooler and an EGR duct, and the EGR duct includes an inflow portion into which the exhaust gas flowing out from the EGR cooler flows, a flow path, and an outflow portion from which the exhaust gas flows out. The flow path is provided such that the height on the side of the inflow portion is lower than the height on the side of the outflow portion, and has a region in which the distance between the center line of a flow path cross section of the flow path and a line along the lowest end in the height direction gradually increases from the outflow portion side toward the inflow portion side.

An exhaust gas recirculation structure includes an EGR cooler and an EGR duct, and the EGR duct includes an inflow portion into which the exhaust gas flowing out from the EGR cooler flows, a flow path, and an outflow portion from which the exhaust gas flows out. The flow path is provided such that the height on the side of the inflow portion is lower than the height on the side of the outflow portion, and has a region in which the distance between the center line of a flow path cross section of the flow path and a line along the lowest end in the height direction gradually increases from the outflow portion side toward the inflow portion side.

An internal combustion engine assembly includes a fuel tank, connected via a fuel supply duct to a first fuel inlet of a cylinder, the cylinders with an outlet connected to an exhaust system. Exhaust gases from the exhaust system are in heat exchanging contact with a reformer unit for steam reforming of alcohol, the reformer unit being with a reformer outlet connected to a to a second fuel inlet of the cylinders for supplying hydrogen to the second fuel inlet. An alcohol evaporator is in heat exchanging contact with the exhaust gases. A water evaporator is in heat exchanging contact with the exhaust gases. A reformer purge duct extends from the exhaust system to the inlet of the reformer unit via a purge control valve, adapted for feeding exhaust gases into the reformer unit and via the reformer outlet to the second fuel inlet of the cylinders.

Provided are an exhaust gas recirculation (EGR) system and a vehicle. The EGR system includes a cooler, a first end of the cooler is provided with an air inlet for connecting to an exhaust system of the vehicle, and a second end of the cooler is provided with an air outlet, an air passage is connected between the air inlet and the air outlet in the cooler, and the air outlet is at a position higher than the air inlet in a vertical direction. The cooler is further provided with at least one water inlet for a cooling liquid to enter and at least one water outlet for discharging waste cooling liquid.

A compact EGR valve uses a BLDC motor to drive a valve member between a closed position blocking flow of exhaust gases and a range of open positions where exhaust gasses flow through the valve. A drive mechanism includes a nut in a fixed position and a screw arranged to rotate within the nut so that rotation of the screw causes the screw to move axially relative to the nut. The screw is coupled to a valve member and the valve member moves axially and rotationally with the screw. The screw slides along the length of a motor shaft as the screw moves axially relative to the nut and motor. Rotation of the valve member within the valve chamber during axial movement aids in removal of deposits that may accumulate within the valve housing.

A compact EGR valve uses a BLDC motor to drive a valve member between a closed position blocking flow of exhaust gases and a range of open positions where exhaust gasses flow through the valve. A drive mechanism includes a nut in a fixed position and a screw arranged to rotate within the nut so that rotation of the screw causes the screw to move axially relative to the nut. The screw is coupled to a valve member and the valve member moves axially and rotationally with the screw. The screw slides along the length of a motor shaft as the screw moves axially relative to the nut and motor. Rotation of the valve member within the valve chamber during axial movement aids in removal of deposits that may accumulate within the valve housing.

A method of operating exhaust gas recirculation pump for an internal combustion engine including: providing an EGR pump assembly including an electric motor coupled to a roots device having rotors, the EGR pump operably connected to an internal combustion engine; providing an EGR control unit linked to the EGR pump assembly; providing sensors linked to the EGR control unit; determining if a motor speed is within a predetermined target in step S1 wherein when motor speed=predetermined target then; determining if a motor torque is within a predetermined target in step S2 wherein when motor torque=predetermined target then; determining if a motor temperature is within a predetermined target in step S3 wherein when motor temperature=predetermined target then; and maintaining operation of the exhaust gas recirculation pump.

A method of operating exhaust gas recirculation pump for an internal combustion engine including: providing an EGR pump assembly including an electric motor coupled to a roots device having rotors, the EGR pump operably connected to an internal combustion engine; providing an EGR control unit linked to the EGR pump assembly; providing sensors linked to the EGR control unit; determining if a motor speed is within a predetermined target in step S1 wherein when motor speed=predetermined target then; determining if a motor torque is within a predetermined target in step S2 wherein when motor torque=predetermined target then; determining if a motor temperature is within a predetermined target in step S3 wherein when motor temperature=predetermined target then; and maintaining operation of the exhaust gas recirculation pump.