A marine engine comprises a powerhead having an engine block, a cylinder head and a crankcase containing a crankshaft. Operation of the marine engine causes rotation of the crankshaft. A crankcase cover encloses the crankshaft in the crankcase. A supercharger is on the crankcase cover, the supercharger being configured to provide charge air for combustion in the powerhead. The supercharger comprises a charge air outlet for conveying charge air from the supercharger for combustion in the powerhead, the charge air outlet being oriented so as to discharge the charge air towards the powerhead.

An apparatus and methods are provided for a turbocharger intake system for an off-road vehicle. The turbocharger intake system comprises a turbocharger disposed at a rear of an engine of the vehicle, such that heat radiated from the turbocharger is directed rearward of the engine during operation of the vehicle. The turbocharger is coupled with an exhaust manifold for conducting exhaust gases from the engine to the turbocharger. An air intake duct is routed from an intake air filter canister to the turbocharger for conveying filtered air to the turbocharger. A suitable air filter is housed within the intake air filter canister so as to remove airborne particulate matter from the air entering the engine. The turbocharger drives charged intake air through an intercooler for lowering the temperature of charged intake air. The charged intake air is directed to combustion chambers of the engine by way of an intake manifold.

An engine system includes an internal combustion engine having an engine block with one or more piston-cylinder arrangements communicating with an intake manifold and an exhaust manifold, a charge air passageway to the intake manifold, and an exhaust gas passageway that receives exhaust gas from the exhaust manifold. The engine system also includes one or more turbochargers each including a compressor to compress charge air and output the compressed charge air to the charge air passageway and a turbine that receives exhaust gas from the exhaust gas passageway and drives the compressor in response to the exhaust gas passing through the turbine. An air pump is positioned downstream of the compressor that supplies a portion of the compressed charge air into the exhaust gas passageway upstream of the turbine, such that the turbine receives both exhaust gas and compressed charge air.

An engine system includes an internal combustion engine having an engine block with one or more piston-cylinder arrangements communicating with an intake manifold and an exhaust manifold, a charge air passageway to the intake manifold, and an exhaust gas passageway that receives exhaust gas from the exhaust manifold. The engine system also includes one or more turbochargers each including a compressor to compress charge air and output the compressed charge air to the charge air passageway and a turbine that receives exhaust gas from the exhaust gas passageway and drives the compressor in response to the exhaust gas passing through the turbine. An air pump is positioned downstream of the compressor that supplies a portion of the compressed charge air into the exhaust gas passageway upstream of the turbine, such that the turbine receives both exhaust gas and compressed charge air.

A vehicle has a hybrid drive including an internal combustion engine and at least one electric motor. The hybrid drive has a charging device for generating an air flow. A charge air path guides the air flow from the charging device to the internal combustion engine. A charge air cooler is arranged in the charge air path between the charging device and the internal combustion engine. The hybrid drive has an electric battery for supplying electric power to the at least one electric motor. The effort involved in cooling the battery is reduced if the battery is incorporated into the charge air path between the charge air cooler and the internal combustion engine in such a way that the air flow can flow through and/or around it.

A dual turbocharger system for an engine is provided. In one example, the dual turbocharger system may include two variable geometry turbines (VGTs), with each turbine being of the same size and operating in parallel, and with each compressor of the turbocharger operating in series, the first compressor of the first turbocharger being larger than the second compressor of the second turbocharger.

A system and method operate by, while an engine is operating, automatically determining whether the engine is in a designated state for EGR cooler cleaning. The EGR cooler is operably coupled to the engine to receive hot EGR from an exhaust of the engine and to provide cooled EGR to an intake of the engine. The system and method also include, responsive to the engine not being in the designated state, automatically preventing a water pump system from introducing a cleaning liquid into a gas inlet of the EGR cooler.

An engine system includes an internal combustion engine having an engine block with one or more piston-cylinder arrangements communicating with an intake manifold and an exhaust manifold, a charge air passageway to the intake manifold, and an exhaust gas passageway that receives exhaust gas from the exhaust manifold. The engine system also includes one or more turbochargers each including a compressor to compress charge air and output the compressed charge air to the charge air passageway and a turbine that receives exhaust gas from the exhaust gas passageway and drives the compressor in response to the exhaust gas passing through the turbine. An air pump is positioned downstream of the compressor that supplies a portion of the compressed charge air into the exhaust gas passageway upstream of the turbine, such that the turbine receives both exhaust gas and compressed charge air.

A transfer tube for a thermal transfer device can include at least one wall having an inner surface and an outer surface, where the inner surface forms a cavity, where the at least one wall further has a first end and a second end. The first end can be configured to couple to a terminus of a heat exchanger of the thermal transfer device. The second end can be configured to couple to a collector box of the thermal transfer device. At least a portion of the at least one wall can be disposed in a vestibule of the thermal transfer device. The cavity can be configured to simultaneously receive a first fluid that flows from the first end to the second end and a second fluid that flows from the second end to the first end.

A heat exchanger with a core part; an upper reinforcing plate which is disposed on the upper side of the core part in the height direction and in which a first fixing/matching section is formed; a pair of lateral reinforcing plates disposed on both sides of the core part in the longitudinal direction, the upper side of at least one of the two lateral reinforcing plates being coupled to the first fixing/matching section of the upper reinforcing plate, and a second fixing/matching section being formed on the lower side of each of the lateral reinforcing plates; and a lower reinforcing plate disposed on the lower side of the core part in the height direction, and both sides of which are coupled to the second fixing/matching sections of the pair of lateral reinforcing plates, wherein each of components can be correctly positioned, and thus productivity and assemblability are improved.