摘要:
A resistive grid enclosure for a vehicle having a dynamic braking capability, the grid enclosure defining an air inlet, an air outlet, and an airflow path through the enclosure from the air inlet to the air outlet. A resistive grid disposed within the enclosure is cooled by air flowing through the airflow path from the air inlet to the air outlet. The airflow path is configured so that an inlet airflow is heated by absorbing heat from the resistive grid and directed toward the air outlet forming a heated outlet airflow. The airflow path is further configured to direct at least a portion of the heated outlet airflow into the air inlet to reduce blockage of the air inlet by ice or snow.
摘要:
In a locomotive having a dynamic braking capability, a method for maintaining an airflow path to a resistive grid disposed within a resistive grid enclosure having an enclosure inlet and an enclosure outlet is provided, wherein the method includes generating an inlet airflow into the enclosure inlet, creating a heated inlet airflow by associating the inlet airflow with the resistive grid such that the inlet airflow absorbs heat generated by the resistive grid, directing the heated inlet airflow toward the enclosure outlet to generate a heated outlet airflow, redirecting at least a portion of the heated outlet airflow to be thermally associated with a structural portion of the enclosure inlet such that the temperature of the structural portion of the enclosure inlet is increased above a predetermined temperature to reduce blockage of the enclosure inlet by snow and recirculating the redirected heated outlet airflow with ambient air being drawn into the resistive grid enclosure.
摘要:
A vehicle with a primary driveline that is configured to distribute rotary power to a first set of vehicle wheels and a power transmitting device that can be selectively operated to transmit rotary power to a secondary driveline. The power transmitting device has an input member, which is driven by the primary driveline, and an output member that is selectively coupled to the input member to receive rotary power therefrom.
摘要:
A system, kit, and service method for exhaust gas recirculation cooling are described. In one example, a removable cooling system for an engine, the engine in a vehicle car body, the system comprising: a removable package including a first exhaust gas recirculation cooler, a second exhaust gas recirculation cooler, and a third exhaust gas recirculation cooler, the first, second, and third coolers coupled together in series, where the removable package is located at a top of the vehicle car body and where the removable package is removably coupled to the vehicle as a unit.
摘要:
A method of operating an engine having exhaust gas recirculation from an exhaust manifold of the engine to an intake manifold of the engine, the engine in a locomotive or other vehicle car body, the engine further having an intake system turbocharger with an air-cooled intercooler, the method including cooling the exhaust gas recirculation via a first airflow generated by car body motion, cooling compressed engine induction air in the air-cooled intercooler via a second airflow, and cooling the exhaust gas recirculation via the second airflow.
摘要:
A cooling system (10) for a turbocharged locomotive engine (12) including a two stage intercooler (20) for conditioning the combustion air (16). A first coolant loop (32) includes a first stage intercooler (38), the engine coolant passages (22), a radiator (34), a first tank (36), an oil cooler (30), and a first pump (40). A second coolant loop (42) includes a second stage intercooler (44) a subcooler (48), a second tank (46), and a second pump (50). A fluid connection is provided between the first coolant loop (32) and the second coolant loop (42) to provide heat there between during conditions of overcooling of the second coolant loop (42). Flow control valves forming a portion of first coolant loop (32) may be embodied in a single rotor-sleeve flow control valve (130).
摘要:
Thermal management systems and methods related to controlling temperature of internal combustion engines are provided. In one embodiment, a thermal management system includes an air intake structure defining an air intake passage therethrough coupled to a plurality of cylinders in an engine, a multi-stage cooling assembly, positioned in the air intake passage, including an air-to-coolant intercooler for cooling intake air and an air-to-air heat exchanger for cooling intake air, an air-to-coolant radiator fluidly coupled with the air-to-coolant intercooler of the multi-stage cooling assembly, a first fan operable to provide air flow to the multi-stage cooling assembly and the air-to-coolant radiator, and a second fan operable to provide air flow to the air-to-coolant radiator.
摘要:
Thermal management systems and methods related to controlling temperature of internal combustion engines are provided. In one embodiment, a thermal management system includes an air intake structure defining an air intake passage therethrough coupled to a plurality of cylinders in an engine, a first turbocharger including a first compressor positioned in the air intake passage, a second turbocharger including a second compressor positioned in the air intake passage between the first compressor and the plurality of cylinders, a multi-stage cooling assembly, positioned in the air intake passage between the first compressor and the second compressor, including an air-to-coolant intercooler for cooling intake air and an air-to-air heat exchanger for cooling intake air, and an air-to-coolant radiator fluidly coupled with the air-to-coolant intercooler of the multi-stage cooling assembly.
摘要:
A system for cooling an engine on a vehicle without a coolant based intercooler and intermediate duct, the system including an air-to-oil radiator system configured to cool oil that flows through an engine, an air-to-air radiator system configured to cool air that flows through the engine and further configured to operate in conjunction with the air-to-oil radiator system to provide cool air for use with the air-to-oil radiator system, and a slow flow coolant radiator configured to cool a coolant provided to cool the engine and further provided to operate in conjunction with the air-to-oil radiator system. A method for cooling oil in an engine without a coolant based intercooler and intermediate duct is also disclosed.
摘要:
An enhanced split cooling system for a turbocharger and an engine includes an oil cooler, a three-way valve assembly and a four-way valve assembly for controlling the flow of coolant, and radiators and subcoolers, for controlling coolant temperature. The valve assemblies are independently controllable to direct coolant through an oil cooler and a turbocharger intercooler either directly from the engine if the oil cooler and intercooler require heating or from the radiators and subcoolers if the oil cooler and intercooler require cooling. Depending upon the engine operating temperature, the valve assemblies can be configured to establish at least three different coolant processing modes.