A cooling mechanism 10 includes: a cooling circuit 11; and a compressor cooling path 30 branched from the cooling circuit 11 and joined to the cooling circuit 11 after passing through an inside of a compressor 22. The cooling mechanism 10 includes a flow rate adjustment valve 32 configured to control a flow rate of cooling water flowing inside the compressor 22. The flow rate adjustment valve 32 is configured to make the flow rate of the cooling water flowing inside the compressor 22 when a temperature of intake air at an outlet of the compressor 22 is lower than a temperature of the cooling water lower than the flow rate of the cooling water flowing inside the compressor 22 when the temperature of the intake air at the outlet of the compressor 22 becomes equal to or higher than the temperature of the cooling water.

Embodiments of methods and systems related to operating a mobile asset are provided. In one example, a method for operating a mobile asset includes adjusting a fuel combustion ratio of a plurality of mobile assets based on an emission type exceeding a corresponding threshold, wherein the fuel combustion ratio includes a plurality of fuel types.

A system for controlling the temperature of an engine, which includes at least one cylinder. The system includes a turbocharger and at least one air-nozzle. The turbocharger includes exhaust-gas-inlet-port, an exhaust-gas-outlet-port, an air-inlet-port, a compressed-air-outlet-port, a turbine and a compressor. The exhaust-gas-inlet-port is coupled with the exhaust-gas-outlet of the engine. Exhaust gas from the engine rotates the turbine, which rotates the compressor. The compressor draws air from the air inlet port, compresses the air thereby increasing the pressure thereof, and provides the compressed air to the compressed-air-outlet-port. An inlet of the air-nozzle or nozzles is coupled with the compressed-air-outlet-port. The air-nozzle or nozzles are directed toward a respective one of the at least one cylinder, and directs a flow of air toward the respective one of the at least one cylinder.

An exhaust gas recirculation (EGR) system for an internal combustion (IC) engine. The EGR system has a first cooler configured to cool exhaust from an exhaust system of the IC and to drain exhaust liquid formed by the cooling. The EGR system has a mixture chamber configured to mix exhaust cooled by the first cooler with intake air to form an exhaust-air mixture. The EGR system has a second cooler configured to cool the exhaust-air mixture. The EGR system has a heat exchange system for circulating and cooling coolant fluid used by the first and second coolers, and includes a split valve configured to divide coolant fluid flow between the first and second coolers. The EGR system has an engine control module configured to adjust the split valve based on comparing a temperature of the exhaust-air mixture to a determined dewpoint temperature of the exhaust-air mixture.

Methods and systems are provided for a tempering circuit. A system comprises where the tempering circuit is fluidly coupled to each of an engine cooling circuit, an EGR cooler, and an EGR valve. The tempering circuit comprising a plurality of control valves for selectively adjusting tempering medium flow to various portions of the tempering circuit.

An intercooler includes a cooling tube that defines therein a first coolant passage through which a first coolant flows, and a second coolant passage through which a second coolant flows. A pair of plate portions having a predetermined shape are bonded with each other by brazing in a condition where the pair of plate portions are superposed on each other such that the first coolant passage and the second coolant passage are defined between the pair of plate portions. The cooling tube includes a passage partition portion separating the first coolant passage from the second coolant passage at a part of the pair of plate portions between the first coolant passage and the second coolant passage, and at least one through-hole in the passage partition portion. At least one swaged portion that crimps the pair of plate portions is provided in a periphery of the through-hole.

A charge air control system for a forced induction internal combustion engine, comprising sensing means, comparison means and temperature control means. The sensing means are arranged to measure one or more attributes of charge air proximal to an air inlet of the internal combustion engine. The comparison means are arranged to compare the one or more attributes of charge air to at least one predetermined value. The temperature control means are arranged to control the temperature of the charge air in dependence on the comparison means.

Embodiments of methods and systems related to operating a mobile asset are provided. In one example, a method for operating a mobile asset includes supplying an engine with a fuel controller a first amount of a first fuel and a second amount of a second fuel and combusting the first fuel and the second fuel at a fuel combustion ratio in at least one cylinder of the engine, the first amount and the second amount being selected based on route information for a route along which the mobile asset is operable to travel and a projected exhaustion of the first fuel that does not precede a projected exhaustion of the second fuel, wherein the mobile asset is unable to operate with the second fuel alone.

An intercooler of a liquid-cooled precooler and an air-cooled main cooler. Between two distributor/collector units, disposed at end sides, with sealing plate several layers of flat tubes for charge air are disposed. Flat tubes in the region of the precooler are spaced apart in parallel via flat tubes for coolant of the precooler in thermal contact with the flat tubes and the flat tubes in the region of the main cooler are spaced apart in parallel via outer fins for cooling air. The precooler includes of several layers of flat tubes for coolant which form in the horizontal direction a U-shaped flow channel with an inlet zone, an onward-flow field, a deflection field, a return-flow field and an outlet zone for coolant. Inlet and outlet zones of individual layers of flat tubes are directly connected with one another in the vertical direction and disposed on one side on the intercooler.

A charge air cooler, e.g., as used with a supercharger having meshing rotors in sealing contact with a housing, the housing having an inlet port to admit air into the meshing rotors and the housing having an outlet port to expel air from the meshing rotors, the charge air cooler having an inlet-side core for transmitting the flow of pressurized air, and an outlet-side core receiving the flow of pressurized air transmitted from the inlet-side core and further transmitting the flow of pressurized air, each core having coolant conduits and fins joined to the coolant conduits for contact with the flow of pressurized air, the fins being arranged with a predetermined density, wherein the inlet-side core fin density is lower than the outlet-side core fin density, whereby the inlet-side core presents less resistance to the flow of pressurized air than the outlet-side core and the outlet-side core presents greater surface area for heat conductance from the flow of pressurized air than the inlet-side core. Charge air coolers with this configuration provide improved pressure and temperature characteristics in a supercharger's flow of pressurized air to an engine.