Abstract: A method for reducing engine fuel consumption of an electro-motive vehicle during braking, the method including steps for providing an engine for the vehicle, generating primary electric power at a primary electric power generator connected to the engine, generating primary electric power at a secondary electric power generator connected to the engine, operating a plurality of electric traction motors each coupled in driving relationship to a respective one of a plurality of driven wheels to propel the vehicle during motoring operations and to generate electricity upon braking operations of the vehicle, electrically connecting a braking switch between the traction motors and the primary electric power generator, applying braking, closing the braking switch, and transmitting power generated by the traction motors to the primary electric power generator to operate as a motor to rotate the engine and drive the secondary electric power generator to power the auxiliary equipment without fueling the engine.

Abstract: A dynamic braking system for a vehicle, the system comprising an engine, an alternator, a plurality of alternating current (AC) electric traction motors, each coupled in driving relationship to a respective one of a plurality of driven wheels, a plurality of power inverters where each of the traction motors has excitation windings coupled in circuit with a corresponding one of the plurality of power inverters, a fuel-free dynamic braking controller, a fuel-free dynamic braking transfer switch located between one of the plurality of traction motors and the one of the plurality of power inverters in circuit with the corresponding one of the plurality of power inverters, wherein the one of the plurality of traction motors in circuit with the corresponding one of the plurality of power inverters that is separated by the fuel-free dynamic braking transfer switch does not generate and does not consume power, and wherein the fuel-free dynamic braking controller commands one of the plurality of power inverters that i

Abstract: A dynamic braking system for a vehicle, the system comprising an engine, an alternator, a plurality of alternating current (AC) electric traction motors, each coupled in driving relationship to a respective one of a plurality of driven wheels, a plurality of power inverters where each of the traction motors has excitation windings coupled in circuit with a corresponding one of the plurality of power inverters, a fuel-free dynamic braking controller, a fuel-free dynamic braking transfer switch located between one of the plurality of traction motors and the one of the plurality of power inverters in circuit with the corresponding one of the plurality of power inverters, wherein the one of the plurality of traction motors in circuit with the corresponding one of the plurality of power inverters that is separated by the fuel-free dynamic braking transfer switch does not generate and does not consume power, and wherein the fuel-free dynamic braking controller commands one of the plurality of power inverters that i

Abstract: An enhanced split cooling system and method for a turbocharged internal combustion engine including a liquid cooled turbocharger 19 and an engine liquid coolant jacket 18, the system comprising a coolant pump 12 for pumping coolant from a coolant storage tank 16 in heat exchange relationship with the engine jacket 18 and turbocharger 19; an oil cooler 32 having coolant input and output lines; a valve assembly 74, 83 including a multi-port rotary valve actuated by a single actuator; a first coolant output line connected for conveying coolant from the engine to the valve assembly 74, 83; a radiator 22 connected via a second coolant line for receiving coolant from the valve assembly 74, 83 and having a coolant outflow line to return coolant to the coolant tank 16; an intercooler 28 operatively associated with the turbocharger 19 for passing the coolant in hear exchange relationship with compressed air in the turbocharger 19; a lube oil subcooler 46 coupled by a third coolant flow line to receive coolant from the

Abstract: An enhanced split cooling system and method for a turbocharged internal combustion engine including a liquid cooled turbocharger 19 and an engine liquid coolant jacket 18, the system comprising a coolant pump 12 for pumping coolant from a coolant storage tank 16 in heat exchange relationship with the engine jacket 18 and turbocharger 19; an oil cooler 32 having coolant input and output lines; a valve assembly 74, 83 including a multi-port rotary valve actuated by a single actuator; a first coolant output line connected for conveying coolant from the engine to the valve assembly 74, 83; a radiator 22 connected via a second coolant line for receiving coolant from the valve assembly 74, 83 and having a coolant outflow line to return coolant to the coolant tank 16; an intercooler 28 operatively associated with the turbocharger 19 for passing the coolant in hear exchange relationship with compressed air in the turbocharger 19; a lube oil subcooler 46 coupled by a third coolant flow line to receive coolant from the

Abstract: 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).

Abstract: A cooling system for a turbo-charged internal combustion engine utilizing a unified flow control valve capable of changing the mode of operation of the system in response to a varying heat demand. The unified flow control valve may be a solenoid operated slider valve having a cylinder with connections to the engine water jacket outlet, the intercooler inlet, the radiator inlet and outlet, and the water tank, and a piston having rows of openings which when aligned with the cylinder connections provide flow paths corresponding to various modes of operation.

Abstract: 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.