Abstract: An air-to-air aftercooler is disclosed. The air-to-air aftercooler includes at least one core assembly and two inlet lines connected to the core assembly. The air-to-air aftercooler may also include a single outlet line configured to direct cooled charge air to an intake manifold of an engine.

Abstract: A drive unit of a motor vehicle, provided with an internal combustion engine, with a combustion air supply having a low-pressure compressor, a high-pressure compressor and a combustion air cooling unit, and with an exhaust gas withdrawal via which exhaust gas formed in the internal combustion engine is withdrawn. The drive unit has a cooling system with at least one cooling circuit in which are arranged a heat exchanger, through which flows a working medium and which can be cooled by atmospheric air, at least one exhaust gas cooler integrated into the exhaust gas withdrawal, and the combustion air cooling unit has a combustion air intercooler and a main combustion air cooler that are thermally coupled to the cooling circuit in such a way that in the direction of flow of combustion air, the combustion air intercooler is disposed between the low-pressure and the high-pressure compressors, and the main combustion air cooler is disposed downstream of the high-pressure compressor.

Abstract: The intake air cooler of the invention comprises a first cooling stage (24) and a second cooling stage (26) grouped in a single heat exchanger housing (30) and sharing a common heat exchanger bundle (28) accommodated in the housing and traversed by a cooling liquid. Application to turbocharged internal combustion engines for motor vehicles.

Abstract: A heat exchanger is provided for dissipating heat from a dual turbocharged engine. The heat exchanger has a jacket water cooler, and first and second charge air coolers. The three coolers are arranged in parallel enabling each to operate with a maximum temperature differential, and have fronts that lie in parallel planes. Charge air from a first turbocharger is directly piped to the first charge air cooler, and charge air from the second turbocharger is directly piped to the second charge air cooler. A first baffle is between and upstream of the first charge air cooler and the jacket water cooler. A second baffle is between and upstream of the second charge air cooler and the jacket water cooler. The baffles can direct selected amounts of air to each of the three coolers and prevent radial convective scrubbing. A fuel oil cooler can also be provided.

Abstract: The invention relates to a charger module (1) for an internal combustion engine, comprising a mechanical charger (2) and two charge coolers (3, 4), mounted downstream of the charger (2), for cooling the compressed charge air. The aim of the invention is to reduce the costs for producing such a charger module without impairing the rigidity or structural stability of the charger module (1). For this purpose, the charger (2) and the two charge coolers (3, 4) are inserted in a common housing (5) which surrounds the charger (2) and the two charge coolers (3, 4) at least on the bottom side and on two opposite sides.

Abstract: A system for chilling the pressurized charge air to a reciprocating engine is disclosed wherein the chilling is provided by a thermally activated refrigeration cycle powered by waste heat from the engine system. This reduces the required compression power, and also retards knock, making higher compression ratios possible. The chilling system is designed to minimize the amount of chilling required, and also to enable use of compression heat to power the chiller. The disclosed improvement also accommodates exhaust gas recirculation, plus providing activation heat from the exhaust gas, plus Miller cycle timing of the intake valves. Referring to FIG. 1, the charge air from turbocharger 5 is cooled in three stages: heat recovery stage 10; ambient-cooled stage 11; and chilling stage 12. Condensed moisture is removed from the charge air by valve 14 before the charge is supplied to inlet manifold 2.

Abstract: The invention relates to a circulation system with at least one first partial flow which can flow through a first heat exchanger and a second partial flow of a first medium. According to the invention, said system comprise also at least one second heat exchanger, in particular a charge air cooler, which can be penetrated by a first media flow, and at least one adjustable mixing element which can be penetrated, on the inflow side, by a first partial flow and/or a second partial flow and, on the outflow side, generates the media flow with a target temperature.

Abstract: An engine intake condensation removal system includes a valve for bypassing flow around a charge air cooler (CAC) to a liquid separator and mixer. The separator is downstream of the CAC and the mixer is downstream of the liquid separator. The mixer controls the amount of bypass flow to heat fluid flow from the CAC to a level higher than the dew point of the fluid flowing through the engine intake. The bypass flow is placed in a heat exchange relationship with the conduit receiving the output of the CAC before mixing to raise the wall temperature sufficiently to prevent condensation.

Abstract: There is provided a supercharger system for supercharging a vehicle engine includes a first lower intake manifold adapter attached to the vehicle engine. The supercharger system further includes a second lower intake manifold adapter attached to the vehicle engine. The first and second lower intake manifold adapters can be attached to respective first and second cylinder heads of the vehicle engine. The supercharger system further includes a plate situated between the first and the second lower intake manifold adapter, where the plate is adapted to receive a supercharger on a bottom surface of the plate. The supercharger provides compressed air that flows through the first and the second lower intake manifold adapter to the vehicle engine. The supercharger system further includes an upper manifold plenum chamber situated over the plate, where the upper manifold plenum chamber receives the compressed air from the supercharger.

Abstract: A power system including an exhaust producing engine, an exhaust system and an exhaust gas recirculation (EGR) system is provided. The EGR system may include an EGR flowpath and an air intake system. The EGR system may also include an EGR valve configured to regulate the flow of exhaust gases through the EGR flowpath. The power system may also include a monitoring system configured to monitor operating parameters of at least two components of the EGR system. The power system may also include a controller configured to determine, based on the monitored operating parameters, a maximum flowrate value for each of the components. Each of the maximum flowrate values may represent the maximum EGR flowrate for that component. The controller may be configured to control the EGR valve, based on the maximum flowrate values, to result in an EGR flowrate no greater than the lowest of the maximum flowrate values.

Abstract: An intercooler system includes an air duct configured to be supplied with outside air, an evaporator, and a heater core of an air-conditioning system being disposed within the air duct. An intercooler is supplied with the outside air from the air duct and configured to cool intake air passing therethrough using the outside air. A valve unit regulates flow of the outside air such that the outside air passes at least one of the evaporator and the heater core and is then supplied to the intercooler. Also, a control unit controls operation of the air-conditioning system and the valve unit.

Abstract: A system for cooling charge air from a turbo- or supercharger and exhaust gas recirculated from an exhaust gas recirculation valve in an internal combustion engine. The system includes a radiator and parallel charge air and exhaust gas heat exchanger units, the charge air heat exchanger unit having aluminum tubes and fins for air cooling the charge air, and the exhaust gas heat exchanger unit having stainless steel tubes and fins. The charge air heat exchanger and the exhaust gas heat exchanger units are each disposed adjacent the radiator, on the same or opposite sides. Alternatively, there is provided a pair of combined charge air cooler and exhaust gas cooler heat exchanger units, with a first heat exchanger unit having stainless steel tubes and fins, and a second heat exchanger unit having aluminum tubes and fins. The heat exchanger units are disposed on opposites sides of the radiator.

Abstract: A cooling system for a work machine is disclosed. The cooling system has a heat exchanger pivotally connected along a pivot axis. The cooling system also has a first fluid conduit and a second fluid conduit. The first fluid conduit is connected to a first end of the heat exchanger at the pivot axis. The second fluid conduit is connected to the heat exchanger at a second end opposite the first end.

Abstract: A system for a virtual frost sensor is disclosed including a method for operating the virtual frost sensor. The method includes determining a first temperature indicative of a fluid upstream of the component and determining a second temperature indicative of a fluid downstream of the component. The method also includes sensing at least one engine parameter and determining a first parameter as a function of the at least one engine parameter. The method further includes determining a third temperature indicative of a temperature associated with the engine component as a function of the first temperature, the second temperature, and the first parameter.

Abstract: In one example, a supercharger and air inlet assembly for a V8 engine comprises a supercharger, a pair of air inlet casings, and a top cover, the air inlet casings having outlet ports which align with inlet ports in the cylinder heads. The supercharger has a rotor casing, the upper sides of which extend upwards to form a peripheral wall where each inlet casing is fastened to the rotor casing by setscrews. Each inlet casing is also secured to the rotor casing by another setscrew located between two casing outlet ports. The arrangement allows the use of a relatively simple casting which simplifies manufacture and minimizes thermal stresses.

Abstract: An intake system for a supercharged engine can include a blow-off passage provides communication between the upstream side of the throttle valve and the upstream side of a supercharger. A blow-off valve opens and closes the blow-off passage. The blow-off valve can be configured to open and close based upon pressure on the downstream side of the throttle valve. The present intake system can further comprise a first conduit providing communication between the upstream side of the throttle valve and the blow-off valve, a second conduit providing communication between the downstream side of the throttle valve and the blow-off valve, and a solenoid valve for switching between the first and second conduits.

Abstract: A dual cold air induction (“DCAI”) system, apparatus and method for decreasing the intake air temperature, which increases the air's volume and efficiency, at the diesel internal combustion engine's point-of-ignition. The DCAI system comprises a dual air cooling unit defined by primary and secondary compartments. The primary compartment ingests ambient air and conditions it to a preset predetermined temperature for mixing with ambient air upstream of the turbocharger's compressor side. The conditioned ambient air, located on the turbocharger's compressor's downstream side, is further conditioned in the secondary compartment to a preset predetermined temperature which is then delivered to the engine intake. The housing, which houses a plurality of air cooling components for producing cold air, has insulative capabilities for maintaining the cold air temperature created within both compartments of the housing.

Abstract: The invention relates to a method for operating an internal combustion engine, wherein exhaust gas produced by the internal combustion engine is returned to the internal combustion engine via an exhaust gas recirculation device, which comprises at least two cooling units with each of which a bypass is associated, the exhaust gas being cooled in the exhaust gas recirculation device as a function of the load state of the internal combustion engine, and wherein fresh air is fed to the internal combustion engine via a charge-air feed device, which comprises at least one cooling unit and at least one bypass connected in parallel to the cooling unit, the fresh air being supplied via the cooling unit and/or the bypass as a function of the load state. The invention also relates to an internal combustion engine comprising an exhaust gas recirculation device and a charge-air feed device.

Abstract: The present invention relates to an arrangement for recirculation of exhaust gases of a supercharged combustion engine (1) in a vehicle. The arrangement comprises an inlet line (10) for supply of compressed air to the combustion engine (1). The inlet line (10) comprises a charge air cooler (11) for cooling the air. The arrangement also comprises a return line (15) which connects the exhaust line (6) to the inlet line (10) so that it is possible, via the return line (15), to recirculate exhaust gases from the exhaust line (6) to the inlet line (10). The return line (15) comprises an EGR cooler (17) for cooling the recirculating exhaust gases. The EGR cooler (17) and the charge air cooler (11) are arranged close to the combustion engine (1) on the cold side of the combustion engine (1) where a branched inlet pipe (24) is fastened.

Abstract: A combustion air cooling system has an aftercooler operable to supply cooled air to the intake manifold of an engine. A fan is operable to force ambient air through the aftercooler. A variable speed fan drive is operable to control the speed of the fan.

Abstract: The present invention relates to a system and method for cooling a combustion gas charge prior. The combustion gas charge may include compressed intake air, exhaust gas, or a mixture thereof. An evaporator is provided that may then receive a relatively high temperature combustion gas charge and discharge at a relatively lower temperature. The evaporator may be configured to operate with refrigeration cycle components and/or to receive a fluid below atmospheric pressure as the phase-change cooling medium.

Abstract: A combined radiator and charge air cooler package includes a radiator having upper and lower portions for cooling engine coolant and a charge air cooler having upper and lower portions for cooling charge air. The upper charge air cooler portion is disposed in overlapping relationship and adjacent to the upper radiator portion, and the lower charge air cooler portion is disposed in overlapping relationship and adjacent to the lower radiator portion. The upper radiator portion and the lower charge air cooler portion are aligned in a first plane, and the lower radiator portion and the upper charge air cooler portion are aligned in a second plane, behind the first plane. Ambient cooling air may flow in series through the upper radiator portion and the upper charge air cooler portion, and also through the lower charge air cooler portion and the lower radiator portion.

Abstract: A crankcase lower part for a supercharged internal combustion engine, wherein the crankcase lower part extends about a space below the crankshaft. The crankshaft lower part comprises an intercooler, which is cooled by coolant, and/or a charge air intermediate cooler, which is cooled by a coolant. The intercooler and/or the charge air intermediate cooler is integrated into the crankcase lower part.

Abstract: A watercraft can include an engine having a crankshaft with its output end extending rearward of a crankcase and a supercharger for compressing air feeding it to the engine. The supercharger can be located forward of a rear end of the crankcase. An exhaust pipe, designed to discharge combustion gas out of the watercraft, can be disposed above the supercharger. Forward of the supercharger, an intake box having an intake duct can be provided. An intercooler can be located beside the supercharger, through which the supercharger feeds the compressed air toward the engine.

Abstract: An apparatus and a method for cooling charge air, comprising the steps of cooling at least one cooling agent conduit with a cooling agent (Step 401), flowing thermally charged air through a plurality of charge air conduits positioned in proximity to the at least one cooling agent conduit (Step 402), circulating ambient air to contact the cooled at least one cooling agent conduit whereby the ambient air is cooled (Step 403), and circulating the cooled ambient air to contact the plurality of charge air conduits whereby the plurality of charge air cooler conduits are cooled further cooling the thermally charged air present within (Step 404).

Abstract: An apparatus and a method for cooling charge air, comprising the steps of introducing a cooling agent into at least one cooling agent conduit whereby the at least one cooling agent conduit is cooled (Step 401), flowing thermally charged air through a plurality of charge air conduits positioned in proximity to the at least one cooling agent conduit (Step 402), directing ambient air to contact the cooled at least one cooling agent conduit whereby the ambient air is cooled (Step 403), and directing the cooled ambient air to contact the plurality of charge air conduits whereby the plurality of charge air cooler conduits are cooled further cooling the thermally charged air present within (Step 404).

Abstract: The invention relates to a circuit arrangement (K) comprising a low-temperature circuit (NK) for cooling charge air (13) that is fed to a motor (8) in a motor vehicle equipped with a turbocharger. According to the invention, the charge air (13) is compressed in two stages in a first low-pressure turbocharger (1) and a second high-pressure turbocharger (2). To cool the charge air (13) a first cooler (3) is provided downstream of the low-pressure turbocharger (1) and upstream of the high-pressure turbocharger (2) and a second cooler (4) is provided downstream of the high-pressure turbocharger (2) and upstream of the motor (8). The invention also relates to a method for operating a circuit arrangement (K) of this type.

Abstract: A method of operating a reciprocating, four stroke internal combustion piston engine system with an external compressor so that the air prior to internal compression is cooled, making it possible to attain a higher compression ratio. This can result in less heat input and the same work per stroke output, thereby saving fuel. Or it can result in more work per stroke output for the same heat input. A form of dynamic braking can be used with its operation. The only modifications to the engine are adding an external compressor, increasing the internal compression ratio, and changing the timing of the inlet valve closing.

Abstract: An integrated system for increasing power output from an internal combustion engine. System facilitates an interface for controlling and conditioning of the amount of intake air into an internal combustion engine. The system interfaces to a controller and provides critical data, an active intercooler, power buffer, and an electrically driven supercharger. An operator interface provides monitoring and control to a controller for expanded operator control. A power buffer relieves host power system from loading during high demand operation. A system of advanced sensors and processing from a controller combine to facilitate maximum power output with reduced risks. Active heat removal enables system operation in a vehicle at rest or in traffic. Active conditioning system flexibility facilitates improved implementation of cold temperature environment starting and operation. A low cost option with commercial non-positive displacement blowers implements affordable enhancements for internal combustion engines.

Abstract: A combined radiator and charge air cooler package comprises a radiator for cooling engine coolant, and a charge air cooler for cooling charge air having upper and lower portions. The upper charge air cooler portion is disposed in overlapping relationship and adjacent to the upper end of the radiator, and the lower charge air cooler portion is disposed in overlapping relationship and adjacent to the lower end of the radiator, on the face side thereof. Ambient air may flow in series through the upper end of the radiator and the upper charge air cooler portion, and through the lower charge air cooler portion and the lower end of the radiator. The charge air cooler portions are operatively connected such that the charge air may flow between the lower manifold of the upper charge air cooler portion and the upper manifold of the lower charge air cooler portion.

Abstract: An improved combustion air charger, such as a turbocharger or a supercharger, includes a housing (10) having a rotary shaft (18) journalled therein. At least one compressor wheel (20,22) is located on the shaft (18). The housing (10) includes an ambient inlet (30) as well as a compressed air outlet (32) and a heat exchanger (36) is located between at least one of the compressor wheels (20) and the outlet (32) and is arranged so that air flow through the heat exchanger (36) is generally in the radially inward direction.

Abstract: The present invention is an engine, including two banks of cylinders in a flat, opposed cylinder arrangement and a crankshaft having a plurality of paired throws, the two throws of each respective pair of throws being disposed adjacent to each other and coplanar with respect to each other.

Abstract: An internal combustion engine (100) includes a turbocharger (107) having a turbine (109) and a compressor (111). A charge-air cooler (121) is in fluid communication with an outlet (117) of the compressor (111) through a hot-air passage (123). An intake throttle (127) is in fluid communication with an outlet (125) of the charge-air cooler (121) through a cool-air passage (129). A junction (137) is located downstream of the intake throttle (127). An intake system (103) and an exhaust gas recirculation system (131, 133, 135) are in fluid communication with the junction (137). A bypass passage (139) containing an orifice (141) fluidly connects the hot-air passage (123) and the intake system (103).

Abstract: A vehicle engine cooling system includes a primary cooling circuit having a primary radiator and a coolant pump. A secondary cooling circuit includes a secondary radiator, an EGR cooler, and a liquid/air charge air pre-cooler receiving engine inlet air from a turbocharger compressor. The coolant pump circulates coolant through the EGR cooler, through the charge air pre-cooler, and through the primary and secondary radiators. A fan blows cooling air through the primary and secondary radiators. The secondary radiator is downstream of the primary radiator in the fan airflow. The cooling system also includes an air-to-air charge air cooler which receives engine inlet air from the liquid/air charge air pre-cooler. The air-to-air charge air cooler is upstream of the primary radiator with respect to flow of cooling air. The cooling system also includes an auxiliary engine fluid cooler which is located between the air-to-air charge air cooler and the primary radiator.

Abstract: A charge air cooler drain system is provided for an engine system having a turbo-compressor and a charge air cooler for cooling air compressed by the turbo-compressor. The drain system includes a reservoir for storing condensation and having a reservoir inlet and a reservoir outlet A check valve is connected between the reservoir inlet and a condensation outlet of the charge air cooler. The check valve is biased to a closed position by a first spring. The drain system also includes a pilot operated valve connected between the reservoir outlet and atmosphere. The pilot operated valve is biased to an open position by a second spring, and has a pilot inlet exposed to pressure in the charge air cooler. The pilot operated valve closes when pressure in the charge air cooler exceeds a threshold pressure. The first and second springs are chosen so that the check valve is closed when the pilot operated valve is open and the pilot operated valve is closed when check valve is open.

Abstract: An aftercooler thermostat housing for an engine is disclosed. The housing system comprises a housing and a thermostat within the housing. The housing system further includes a bypass system for providing a connection to allow an engine coolant to flow to the aftercooler system if the engine coolant temperature is below a first predetermined temperature. The bypass system allows for the engine coolant to flow through a heat exchanger which is part of the aftercooler system if the temperature of the coolant is above the first predetermined temperature. A low temperature aftercooler (LTA) thermostat housing system achieves the necessary heat rejection for the engine via the heat exchanger and achieves low temperature aftercooling using the heat exchanger.

Abstract: A combined radiator and charge air cooler package includes a radiator having upper and lower portions for cooling engine coolant and a charge air cooler having upper and lower portions for cooling charge air. The upper charge air cooler portion is disposed in overlapping relationship and adjacent to the upper radiator portion, and the lower charge air cooler portion is disposed in overlapping relationship and adjacent to the lower radiator portion. The upper charge air cooler portion and the lower radiator portion are aligned in a first plane, and the lower charge air cooler portion and the upper radiator portion are aligned in a second plane, behind the first plane. Ambient cooling air may flow in series through the upper charge air cooler portion and the upper radiator portion, and also through the lower charge air cooler portion and the lower radiator portion.

Abstract: The invention is concerned with a method of deriving mechanical work from a combustion gas in internal combustion engines and reciprocating internal combustion engines for carrying out the method. The invention includes methods and apparatuses for managing combustion charge densities, temperatures, pressures and turbulence in order to produce a true mastery within the power cylinder in order to increase fuel economy, power, and torque while minimizing polluting emissions.

Abstract: The invention constitutes an arrangement for cooling a vehicle component, for example a transmission, disposed adjacent to an engine, which arrangement includes a cooling circuit designed to feed a coolant through the transmission and including a line for coolant to the transmission and a line for coolant to the transmission. According to the invention, the cooling circuit is also designed to cool the engine and includes a further line for feeding the coolant to the engine, and the cooling circuit includes a flow control valve for controlling the coolant in the cooling circuit such that the flow of coolant to the vehicle component is lower than the flow to the engine. As a result of the invention, an improved arrangement is obtained for cooling, for example, a transmission, for example in heavy goods vehicles.

Abstract: There is provided a supercharger system for supercharging a vehicle engine includes a first lower intake manifold adapter attached to the vehicle engine. The supercharger system further includes a second lower intake manifold adapter attached to the vehicle engine. The first and second lower intake manifold adapters can be attached to respective first and second cylinder heads of the vehicle engine. The supercharger system further includes a plate situated between the first and the second lower intake manifold adapter, where the plate is adapted to receive a supercharger on a bottom surface of the plate. The supercharger provides compressed air that flows through the first and the second lower intake manifold adapter to the vehicle engine. The supercharger system further includes an upper manifold plenum chamber situated over the plate, where the upper manifold plenum chamber receives the compressed air from the supercharger.

Abstract: An internal combustion engine with a 2-stage charge loading includes a connection conduit with a supercharger intercooler provided between the compressors of the low pressure stage and high pressure stage. The supercharger intercooler is configured via a cooling unit in the charge air guiding connection conduit between the compressor of the ATL-low pressure stage and the compressor of the ATL-high pressure stage having a cooling medium flowing therethrough as well as by a specially configured section of the connection conduit. The connection conduit in this section forms with its wall the outer wall of the supercharger intercooler and delimits an air through-put volume sufficient to effect, via a cooling medium flowing through the cooling unit, an acceptable cooling of charge air flowing through the cooling unit that is built into the connection conduit.

Abstract: A combined radiator and charge air cooler package comprises a radiator for cooling engine coolant, and a charge air cooler for cooling charge air having upper and lower portions. The upper charge air cooler portion is disposed in overlapping relationship and adjacent to the upper end of the radiator, and the lower charge air cooler portion is disposed in overlapping relationship and adjacent to the lower end of the radiator, on the face side thereof. Ambient air may flow in series through the upper end of the radiator and the upper charge air cooler portion, and through the lower charge air cooler portion and the lower end of the radiator. The charge air cooler portions are operatively connected such that the charge air may flow between the lower manifold of the upper charge air cooler portion and the upper manifold of the lower charge air cooler portion.

Abstract: A method and system for temperature conditioning of engine intake air by use of controllable intercooler which consists of an active thermoelectric device and a controllable valve system which optimally directs the path of airflow through a plurality of chambers in response to signals from a controller in order to optimally provide temperature conditioned air to the engine. System features temperature storage isolated from heat soaked engine components allowing immediate and efficient conditioning of airflow into an internal combustion engine. Intelligent control of this device removes parasitic power drains during high demand situations.

Abstract: A charge air cooler with an integral precooler is disclosed which cools charge air by using both liquid coolant and air coolant. The charge air path is not affected by the use of the liquid coolant. The charge air cooler disclosed can cool particularly hot charge air without a significant drop in pressure.

Abstract: In preferred embodiments, to, e.g., eliminate condensation build-up in the intake manifold and power cylinders, a charge-air cooler (CAC) and/or EGR cooler “bypass” system is provided that can, e.g., control the intake manifold temperature (IMT) above the dew-point temperature of the boosted air. Preferably, a two-port, single valve-body type valve is provided that proportionally controls the amount of charge-air that is “bypassed” (e.g., not cooled), while simultaneously diverting the charge-air cooler return, preferably, inversely proportionally.

Abstract: A method of bypassing an intercooler (105) for an engine (100) includes the step of detecting (703) an idle condition for an engine (100). based on engine speed and load, air is induced (707) to bypass an intercooler (105) for the engine (100) such that air is input to an intake manifold (107) of the engine (100) through an intercooler bypass (115) that excludes the intercooler (105). Improved engine performance on vehicle launch and reduced emissions result.

Abstract: A system and method for controlling an internal combustion engine, having an exhaust recirculation (EGR) system and a charge air cooler, to prevent overheating the charge air cooler. The system calculates the output temperature of a turbocharger compressor as a function of ambient air temperature, air pressure, air mass flow rate, and turbo speed by processing an equation and controls the engine to modify charge air flow to reduce the output temperature of the turbocharger compressor if that temperature exceeds that of a determined crucial temperature above which charge air cooler damage could occur.

Abstract: A locomotive includes an engine (12), an intercooler (16), and an oil cooler (28), each having respective cooling passages formed therein. The locomotive also includes a cooling system (10) in selective communication with the respective cooling passages for selectively providing a first coolant (56) and a second coolant (52) at a higher temperature than the first coolant to the cooling passages. A method of operating the cooling system includes providing, in a first mode, a first coolant flow (26) to the intercooler and a second coolant flow (30) to the oil cooler at a first temperature different than the first coolant flow to achieve preferential cooling of the intercooler. The method also includes providing, in a second mode, the first coolant flow to the intercooler and the second coolant flow to the oil cooler at a second temperature different than the first coolant flow to achieve preferential cooling of the oil cooler.

Abstract: The device comprises a first heat exchanger (22) for exchanging heat between the admission air and a heat-transfer liquid for regulating the temperature of the admission air, the heat exchanger being connected to a circuit (24) for cold heat-transfer liquid, the device further comprising a second heat exchanger (26) for exchanging heat between the admission air and a heat-transfer fluid likewise for regulating the temperature of the admission air and connected to a circuit (28) for very cold heat-transfer fluid that is colder than the heat transfer liquid of the cold heat-transfer liquid circuit (24). The cold heat-transfer liquid circuit (24) preferably comprises a heat exchanger (30) for exchanging heat between air and the cold heat-transfer liquid, e.g. carried by a front face (31) of the motor vehicle.

Abstract: An engine control system determines a desired temperature range of air flowing into an intake manifold of the engine as a function of an operating characteristic, such as the load on the engine or the operating speed of the engine. A bypass conduit is provided in parallel with a heat exchanger, wherein both the bypass conduit and the heat exchanger are connected to an outlet of a compressor to direct air from the compressor to an intake manifold along the parallel paths. By manipulating an air valve in the bypass conduit, an engine control unit can regulate the temperature at an inlet of the intake manifold. A desired temperature is selected from a matrix of stored values as a function of the load on the engine and the engine operating speed.