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: A control system and method for controlling the speed of a plurality of fans for cooling a plurality of fluids in a work machine in accordance with the heat dissipation requirements of the particular heat transfer cores, the present control system including a plurality of sensors positioned to sense the temperature of each of the plurality of fluids, each sensor being operable to output a signal indicative of the temperature of that particular fluid. An electronic controller coupled to the sensors receives signals indicative of the temperature of each of the plurality of fluids, determines therefrom a desired fan speed for each fan, and outputs a signal to individually control the speed of each fan. Each output signal is based upon a comparison of at least some of the temperature error signals determined from the plurality of sensor signals.

Abstract: A system for both providing air flow through a condenser core of an air conditioner and ventilating an engine compartment in a work machine. A control system for controlling the air flow through the condenser core and through the engine compartment includes a signal generating mechanism associated with the air conditioner operable to output a signal to the control system indicative of a desired fan speed, at least one sensor positioned in the engine compartment for determining the air temperature therein, and a controller coupled to the signal generating mechanism and to the at least one sensor for outputting a signal to the fan to control the speed thereof, the output signal being indicative of the highest fan speed dictated by the signals received from the signal generating mechanism and from the at least one sensor.

Abstract: A fan cooling system for cooling heat transfer devices associated with a particular work machine, the system including a plurality of fans positioned and located in the same plane preferably one on top of the other, a first heat transfer device positioned upstream relative to the plurality of fans, a second heat transfer device positioned downstream and adjacent to one side of the fans, a third heat transfer device positioned downstream and adjacent the opposite side of the fans, and suitable shrouds or other separating members positioned around the plurality of fans so as to guide the flow of air into and expelled by each respective fan, the fans being operable to as to create air flow through the first, second and third heat transfer devices.

Abstract: A control system for controlling engine coolant flow in an engine including a first sensor positioned to sense the temperature of a first fluid in the engine and a second sensor positioned to sense the temperature of a second fluid in the engine, an electronic controller coupled with the first and second sensors to receive signals therefrom indicative of the respective temperatures of the first and second fluids, the controller being operable to determine an appropriate pump speed for each of the respective fluids based upon the temperature associated respectively therewith and thereafter outputting a signal to the engine coolant pump motor to control the speed thereof, the outputted signal being indicative of the highest pump speed dictated by the signals received from the first and second sensors.

Abstract: An air-to-air aftercooler or heat exchanger for a vehicular internal combustion engine, which is independent of the main vehicle heat exchanger or radiator, and which is located at a position upon the vehicle which is remote from the main vehicle heat exchanger or radiator, has a filter for filtering ambient air; at least one aftercooler heat exchanger, separate from the main radiator heat exchanger and disposed upon the engine at a location remote from the main radiator heat exchanger, and having a first passageway defined therein which is fluidically connected to the filter for receiving the ambient air which has passed through the filter; a second passageway defined within the at least one aftercooler heat exchanger for receiving turbocharged air from the turbocharger, for conducting the turbocharged air through the at least one aftercooler heat exchanger such that the turbocharged air undergoes a heat exchange process with the ambient air, and for conducting the turbocharged air to the engine intake manif

Abstract: A control system and method for controlling the speed of a plurality of fans for cooling a plurality of fluids in a work machine in accordance with the heat dissipation requirements of the particular heat transfer cores, the present control system including a plurality of sensors positioned to sense the temperature of each of the plurality of fluids, each sensor being operable to output a signal indicative of the temperature of that particular fluid. An electronic controller coupled to the sensors receives signals indicative of the temperature of each of the plurality of fluids, determines therefrom a desired fan speed for each fan, and outputs a signal to individually control the speed of each fan. Each output signal is based upon a comparison of at least some of the temperature error signals determined from the plurality of sensor signals.

Abstract: It is common in the operation of a construction machine to utilize several different functional modes. Some modes may predominately utilize the braking systems of the machine will other modes may predominately utilize the engine to operate the various implements. In either case, supplemental cooling of these systems is often desirable. The present invention provides a cooling system wherein each axle assembly has a cooling system in addition to the conventional cooling system for the engine. All the cooling systems communicate with a common heat exchanger. A pump is provided to circulate oil from the axle assemblies, as well as coolant from the engine through the heat exchanger to reduce the temperature of one of the fluids. A pair of sensors are engaged with the engine and the axles to selective actuate a clutch member to provide driving engagement between the engine and the pump in response to either component reaching a preselected temperature.

Abstract: Cooling systems are necessary to cool fluid circulated through an internal combustion engine so that engine temperatures can be controlled. The subject dual fan cooling system increases the air flow through a heat exchanger (40) by utilizing a primary fan and a secondary fan (50, 82). The primary fan (50) is located on one side of the heat exchanger (40) and pushes air through the heat exchanger (40) while the secondary fan (82) is located on the opposite side of the heat exchanger (40) and pulls air through the heat exchanger (40). The secondary fan (82) is rotatably mounted in a substantially concentric relation with the primary fan (50) to pull air through the heat exchanger (40) at the area (L) of lowest air flow. The secondary fan (82) also substantially eliminates the recirculation of air back through the heat exchanger (40). A shroud (86) encompasses the secondary fan (82) to substantially block air pushed through the heat exchanger (40) by the primary fan (50) from the secondary fan (82).

Abstract: A control mechanism for a remotely mounted motor, such as an antenna rotator, is contained withi n a molded housing having a cover and base, and includes an indicator motor which rotates a switch assembly to a preselected location. The indicator motor is secured by a motor housing integrally molded in the housing base and a polyurethane pad cushions the motor. The motor housing includes side wall members and a cover attached thereto by an integrally molded hinge member on one side wall, and fastening means on the other side walls secures the cover and the motor within the housing.