Abstract: A cooling apparatus (10) and method for a turbocharged internal combustion engine (12). The combustion air (16) exiting a turbocharger (18) is passed over an air-to-water intercooler (40) then over an air-to-air intercooler (42) for heat exchange with liquid coolant and with ambient air (32) respectively. During periods of low ambient air temperature, the combustion air may be directed through a bypass duct (80) around the air-to-air intercooler, and further, may be heated by the coolant in the air-to-water intercooler. A multi-speed fan (44) and/or shutters (48) may be used to control the flow of ambient air across the air-to-air intercooler. A cooling duct (68) provides a flow of ambient air to the fan motor (46) during periods of operation when the flow of ambient air over the air-to-air heat exchanger is restricted by the shutters. Coolant exiting a subcooler (28) has the lowest temperature in the system and is directed to a lube oil cooler (34) for engine lubricant cooling.

Abstract: A cooling apparatus (10) and method for a turbocharged internal combustion engine (12). The combustion air (16) exiting a turbocharger (18) is passed over an air-to-water intercooler (40) then over an air-to-air intercooler (42) for heat exchange with liquid coolant and with ambient air (32) respectively. During periods of low ambient air temperature, the combustion air may be directed through a bypass duct (80) around the air-to-air intercooler, and further, may be heated by the coolant in the air-to-water intercooler. A multi-speed fan (44) and/or shutters (48) may be used to control the flow of ambient air across the air-to-air intercooler. A cooling duct (68) provides a flow of ambient air to the fan motor (46) during periods of operation when the flow of ambient air over the air-to-air heat exchanger is restricted by the shutters. Coolant exiting a subcooler (28) has the lowest temperature in the system and is directed to a lube oil cooler (34) for engine lubricant cooling.

Abstract: Automatic control of the temperature of the inlet air being supplied to the engine (12) of a locomotive (10) in order to optimize the performance of the engine (12) under a variety of ambient air temperatures and pressures. One or more valves (38) is utilized to control the flow of warm air from the engine compartment (14) into the air inlet path (20). The position of valve (38) is controlled by controller (42) in response to at least one of an ambient air temperature signal TA, an ambient atmospheric pressure signal PA, and an inlet air temperature signal TI. The temperature of the air flowing through the warm air flow path 28 may be controlled by selecting from among a plurality of possible inlets (30, 32, 50). By varying the volume and temperature of the air flowing through the warm air flow path (28), the temperature and density of the air supplied at the engine inlet (18) may be moderated across a broad range of ambient air temperatures and pressures.

Abstract: A radiator assembly for a locomotive is provided. The locomotive has an engine for driving the locomotive and a cooling water system for circulating cooling water through the engine to operatively control the temperature of the engine, the assembly including a radiator in fluid communication with the cooling system and a fan which selectively draws air through the radiator and into the inlet of the fan. The radiator assembly also includes a shutter for selectively controlling the drawn air flow through the radiator and a control system operatively attached to the shutter for actuating the shutter to control the drawn air flow in dependence on a determined control temperature. The control assembly is also operatively attached to the fan to select and set the speed of the fan in dependence on the determined control temperature.

Abstract: In a tunnel control system for traction vehicles, the normal deration function is suppressed to delay deration in a tunnel. The traction vehicle is provided with a controller having a normal operation mode and a tunnel operation mode. A tunnel indicator connected to the controller provides an indication of when the vehicle is approaching a tunnel and causes the controller to switch into the tunnel operation mode. In this mode, the controller increases cooling to reduce the temperature of the vehicle's prime mover and the control electronics prior to entering the tunnel. As the traction vehicle enters the tunnel, the controller monitors the engine oil temperature and the ambient air temperature. If the ambient air temperature exceeds a predetermined value, then the cooling of the control electronics is discontinued. If the oil temperature exceeds a threshold (which is about 10.degree. C. higher than the normal deration threshold), then power to the prime mover is derated.

Abstract: A temperature regulating system for a turbo charged engine and the compressed charging air from the turbo charger is disclosed. The heat regulating system employs coolant fluid which flows through the engine to transfer heat from the engine. Depending on the operating conditions of the engine the heated coolant from the engine is distributed among one or more of a plurality of flow paths. In one of the flow paths the coolant flows through a primary radiator where the coolant is cooled. A fan forces air into contact with the radiator to transfer heat from the radiator. A portion of the coolant exiting the radiator flows through a subcooler where the coolant is further cooled. The coolant from the subcooler may be directed to the charged air cooler for cooling the compressed air before flowing back to the engine. In a second flow path, coolant which has not flowed through the radiator, flows through the charged air cooler to heat the compressed air.

Abstract: A hot feed gas is controlled by utilizing a nuclear magnetic resonance analyzer to analyze the composition of the gas and to provide at least one corresponding composition signal. A valve controls the flow of the gas in accordance with a control signal. A network connected to the analyzer and to the valve provides the control signal to the values in accordance with the composition signal so as to control the flow of the gas as a function of the composition of the gas.