An engine having an exhaust gas recirculation (EGR) cooler includes: a high-pressure EGR cooler; an intake manifold which has an intake inlet which is supplied with intake gas, a high-pressure EGR inlet which is supplied with high-pressure EGR gas, a connecting hole which delivers the supplied high-pressure EGR gas to the high-pressure EGR cooler, and a distribution hole which is supplied with the high-pressure EGR gas cooled by the high-pressure EGR cooler; and a high-pressure EGR valve which is disposed on the intake manifold, and controls a flow of the high-pressure EGR gas delivered from the intake manifold to the high-pressure EGR cooler.

An engine having an exhaust gas recirculation (EGR) cooler includes: a high-pressure EGR cooler; an intake manifold which has an intake inlet which is supplied with intake gas, a high-pressure EGR inlet which is supplied with high-pressure EGR gas, a connecting hole which delivers the supplied high-pressure EGR gas to the high-pressure EGR cooler, and a distribution hole which is supplied with the high-pressure EGR gas cooled by the high-pressure EGR cooler; and a high-pressure EGR valve which is disposed on the intake manifold, and controls a flow of the high-pressure EGR gas delivered from the intake manifold to the high-pressure EGR cooler.

An exhaust heat recovery device according to one aspect of the present disclosure includes a main flow path, a secondary flow path, a plurality of heat exchangers, and a communication portion. Exhaust gas flows in the main flow path. The secondary flow path is a flow path branched from the main flow path, and at least a portion of the exhaust gas flows in the secondary flow path. The plurality of heat exchangers are arranged in the secondary flow path. The communication portion communicates with the plurality of heat exchangers and constitutes a portion of the secondary flow path. The communication portion is provided with an exhaust gas outlet which is an outlet for exhaust gas used for exhaust gas recirculation.

A vehicle EGR cooler may include a housing provided wherein coolant flows therein, a gas tube into which exhaust gas flows through the housing, cooling fins disposed in the gas tube, a variable valve, a portion of which is fixed to one side of the housing, the variable valve having a length varied in a width direction of the cooling fins depending on a temperature of a coolant, and an auxiliary cooling fin provided at one side of the housing to be connected to the variable valve, the auxiliary cooling fin being inserted into the gas tube to be formed between the cooling fins, the auxiliary cooling fin coming into contact with or being away from the cooling fins while moving according to a variation in length of the variable valve, varying a radiation area for the exhaust gas.

A vehicle EGR cooler may include a housing provided wherein coolant flows therein, a gas tube into which exhaust gas flows through the housing, cooling fins disposed in the gas tube, a variable valve, a portion of which is fixed to one side of the housing, the variable valve having a length varied in a width direction of the cooling fins depending on a temperature of a coolant, and an auxiliary cooling fin provided at one side of the housing to be connected to the variable valve, the auxiliary cooling fin being inserted into the gas tube to be formed between the cooling fins, the auxiliary cooling fin coming into contact with or being away from the cooling fins while moving according to a variation in length of the variable valve, varying a radiation area for the exhaust gas.

Methods and systems are provided for condensate management in an EGR cooler of an engine system. In one example, an exhaust gas recirculation (EGR) system with an EGR cooler is coupled to an exhaust system and to an intake system of an engine. The EGR cooler includes an inlet coupled to the exhaust system, a first outlet coupled to the exhaust system, and a second outlet coupled to the intake system, the second outlet positioned vertically higher than the first outlet.

Methods and systems are provided for condensate management in an EGR cooler of an engine system. In one example, an exhaust gas recirculation (EGR) system with an EGR cooler is coupled to an exhaust system and to an intake system of an engine. The EGR cooler includes an inlet coupled to the exhaust system, a first outlet coupled to the exhaust system, and a second outlet coupled to the intake system, the second outlet positioned vertically higher than the first outlet.

Methods and systems are provided for carrying out on-board diagnostics of a plurality of components of an exhaust heat exchange system. In one example, degradation of one or more of a heat exchanger and a coolant system fluidically coupled to the heat exchanger may be detected based on a first temperature estimated upstream of the heat exchanger, a second temperature sensor estimated downstream of the heat exchanger, a coolant temperature, and a pressure estimated upstream of the heat exchanger. Also, degradation of a diverter valve of the heat exchange system may be detected based on inputs of a position sensor coupled to the diverter valve.

Methods and systems are provided for carrying out on-board diagnostics of a plurality of components of an exhaust heat exchange system. In one example, degradation of one or more of a heat exchanger and a coolant system fluidically coupled to the heat exchanger may be detected based on a first temperature estimated upstream of the heat exchanger, a second temperature sensor estimated downstream of the heat exchanger, a coolant temperature, and a pressure estimated upstream of the heat exchanger. Also, degradation of a diverter valve of the heat exchange system may be detected based on inputs of a position sensor coupled to the diverter valve.

The invention relates to a turbine casing of an exhaust-gas turbocharger, having an inlet connection piece adjoined by a spiral, and having an outlet connection piece, characterized by an insulating device for reducing the input of heat into the inlet connection piece, the spiral and/or the outlet connection piece.