An exhaust gas recirculation (EGR) cooler includes: a housing having an exhaust gas inlet and an exhaust gas outlet, a coolant inlet and a coolant outlet, and a plurality of grooves protruding inward from upper and lower surfaces of the housing; a plurality of tubes spaced apart from each other so that exhaust gas flows in the housing; and a plurality of supporters supporting the plurality of tubes in the housing, wherein the plurality of supporters are disposed between an upper surface of the housing and a tube adjacent the upper surface of the housing among the plurality of tubes, between an lower surface of the housing and a tube adjacent the lower surface of the housing among the plurality of tubes, and between the plurality of tubes so that the plurality of supporters are disposed in a space in which the coolant flows inside the housing.

An exhaust gas recirculation (EGR) cooler includes: a housing having an exhaust gas inlet and an exhaust gas outlet, a coolant inlet and a coolant outlet, and a plurality of grooves protruding inward from upper and lower surfaces of the housing; a plurality of tubes spaced apart from each other so that exhaust gas flows in the housing; and a plurality of supporters supporting the plurality of tubes in the housing, wherein the plurality of supporters are disposed between an upper surface of the housing and a tube adjacent the upper surface of the housing among the plurality of tubes, between an lower surface of the housing and a tube adjacent the lower surface of the housing among the plurality of tubes, and between the plurality of tubes so that the plurality of supporters are disposed in a space in which the coolant flows inside the housing.

A fuel injection control method includes measuring EGR (exhaust gas recirculation) rate through a CO2 sensor measuring the amount of CO2 entering the intake side of the engine, setting an optimum SCR (Steam to Carbon Ratio) value based on the measured EGR rate, calculating the amount of steam supplied to the engine based on the measured EGR rate, calculating an actual SCR value by the ratio of the steam amount and the carbon component of the fuel supplied to the engine, comparing the actual SCR value with the optimum SCR value, calculating the SCR difference value by subtracting the optimum SCR value from the actual SCR value if the actual SCR value is greater than the optimum SCR value, calculating an additional fuel amount to be added based on the SCR difference value, and injecting fuel to the fuel reformer based on the calculated additional fuel amount.

A fuel injection control method includes measuring EGR (exhaust gas recirculation) rate through a CO2 sensor measuring the amount of CO2 entering the intake side of the engine, setting an optimum SCR (Steam to Carbon Ratio) value based on the measured EGR rate, calculating the amount of steam supplied to the engine based on the measured EGR rate, calculating an actual SCR value by the ratio of the steam amount and the carbon component of the fuel supplied to the engine, comparing the actual SCR value with the optimum SCR value, calculating the SCR difference value by subtracting the optimum SCR value from the actual SCR value if the actual SCR value is greater than the optimum SCR value, calculating an additional fuel amount to be added based on the SCR difference value, and injecting fuel to the fuel reformer based on the calculated additional fuel amount.

One embodiment is a system comprising an internal combustion engine having one or more non-dedicated cylinders and one or more dedicated EGR cylinders configured to provide EGR to the engine via an EGR loop, a first spark plug coupled to each of the one or more non-dedicated cylinders, and a second spark plug coupled to each of the one or more dedicated EGR cylinders, wherein the second spark plug has a physical or dimensional characteristic that is different from the first spark plug. In certain forms each of the non-dedicated cylinders has only one of a first type of spark plug and each of the dedicated EGR cylinders has only one of a second type of spark plug. One or more of the characteristics that may vary between the first and second types of spark plugs include spark gap, electrode diameter, heat range, and ion sensing capability.

The present invention relates to an aluminum alloy material for a gas tube included in an exhaust gas recirculation (EGR) system. More specifically, the present invention relates to an aluminum alloy material for a gas tube, the an aluminum alloy material including: a core material; an outer material cladded onto a single surface or opposite surfaces of the core material; and an intermediate material cladded between the core material and the outer material to prevent magnesium from diffusing into the outer material from the core material, wherein the core material includes copper (Cu), silicon (Si), iron (Fe), magnesium (Mg), manganese (Mn), titanium (Ti), and aluminum (Al). According to the present invention, the aluminum alloy material for a gas tube in an EGR cooler is excellent in strength and corrosion resistance, thereby extending the life span of gas tube even under extreme conditions.

The present invention relates to an aluminum alloy material for a gas tube included in an exhaust gas recirculation (EGR) system. More specifically, the present invention relates to an aluminum alloy material for a gas tube, the an aluminum alloy material including: a core material; an outer material cladded onto a single surface or opposite surfaces of the core material; and an intermediate material cladded between the core material and the outer material to prevent magnesium from diffusing into the outer material from the core material, wherein the core material includes copper (Cu), silicon (Si), iron (Fe), magnesium (Mg), manganese (Mn), titanium (Ti), and aluminum (Al). According to the present invention, the aluminum alloy material for a gas tube in an EGR cooler is excellent in strength and corrosion resistance, thereby extending the life span of gas tube even under extreme conditions.

An exhaust gas recirculation (EGR) cooler includes: a housing having an exhaust gas inlet and an exhaust gas outlet, a coolant inlet and a coolant outlet, and a plurality of grooves protruding inward from upper and lower surfaces of the housing; a plurality of tubes spaced apart from each other so that exhaust gas flows in the housing; and a plurality of supporters supporting the plurality of tubes in the housing, wherein the plurality of supporters are disposed between an upper surface of the housing and a tube adjacent the upper surface of the housing among the plurality of tubes, between an lower surface of the housing and a tube adjacent the lower surface of the housing among the plurality of tubes, and between the plurality of tubes so that the plurality of supporters are disposed in a space in which the coolant flows inside the housing.

An exhaust gas recirculation (EGR) cooler includes: a housing having an exhaust gas inlet and an exhaust gas outlet, a coolant inlet and a coolant outlet, and a plurality of grooves protruding inward from upper and lower surfaces of the housing; a plurality of tubes spaced apart from each other so that exhaust gas flows in the housing; and a plurality of supporters supporting the plurality of tubes in the housing, wherein the plurality of supporters are disposed between an upper surface of the housing and a tube adjacent the upper surface of the housing among the plurality of tubes, between an lower surface of the housing and a tube adjacent the lower surface of the housing among the plurality of tubes, and between the plurality of tubes so that the plurality of supporters are disposed in a space in which the coolant flows inside the housing.

In some implementations, an exhaust gas recirculation cooler may include a shell defining an internal chamber; a first tube support plate defining a first wall of the internal chamber; a second tube support plate defining a second wall of the internal chamber; a plurality of cooling tubes extending through the internal chamber from the first tube support plate to the second tube support plate, the plurality of cooling tubes being flexible tubes; and at least one separator plate, extending within the internal chamber between the first tube support plate and the second tube support plate, that partitions the internal chamber such that a first set of the plurality of cooling tubes are to a first side of the at least one separator plate and a second set of the plurality of cooling tubes are to a second side of the at least one separator plate.