Abstract: A system for controlling the temperature of a vehicle driveline component assembly includes using forced air to cool lubricant within the assembly. As heat builds up during braking applications, for example, a controller determines when additional cooling may be needed. An air source is activated to induce air flow through at least one flow passage supported relative to the housing so that the air flowing through the passage can absorb heat from the lubricant. In one example, the air flow passage is supported within the component housing. In another example, the air flow passage is associated with a heat exchanger supported external to the component housing in a strategic location on the vehicle or the housing, for example. A pump responsible for causing the air flow preferably also causes lubricant flow in a desired manner to facilitate heat dissipation.

Abstract: A vehicle driveline component temperature control assembly utilizes compressed air or another fluid to cause air flow across an external portion of the driveline component. The airflow facilitates heat transfer or heat dissipation from within the driveline component to assist in maintaining the temperature of the component within an acceptable range. A supply of compressed air or other fluid communicates with at least one discharge device supported on an external housing of the driveline component. The discharge device includes at least one manifold having at least one opening through which the compressed air is delivered to create an airflow across the external surface of the housing. In one example, each discharge device comprises multiple, generally C-shaped manifolds that are secured in place and supported on the external surface of the housing. The inventive arrangement is particularly useful for off-highway vehicle driveline components such as axle and wet disc brake assemblies.

Abstract: An axle assembly includes braking components that generate heat during braking applications. The axle assembly includes a housing defining a housing cavity and a rotating component mounted for rotation relative to the housing. A heat dissipation member is mounted along an external surface of the housing. Fluid flow cooperates with the heat dissipation member to cool axle components. The axle assembly preferably includes wet disc brakes having a brake housing defining a brake cavity in fluid communication with the housing cavity. The heat dissipation member preferably includes internal passages in communication with the housing and brake cavities. A pumping mechanism generates fluid flow through the internal passages and through the brake and housing cavities to dissipate heat generated during braking.

Abstract: A system for cooling vehicle driveline components, such as axles or wet disc brake assemblies utilizes evaporative cooling effects of liquid applied to an exterior surface on the housing. A liquid supply is coupled with an outlet and a controller determines when cooling is needed. Liquid is applied onto the housing from the outlet as cooling is needed. One example includes a plurality of fluid collectors on a portion of the housing exterior to increase the amount of liquid maintained on the housing to increase the evaporative cooling effect.

Abstract: A system for controlling the temperature of a vehicle driveline component assembly includes using forced air to cool lubricant within the assembly. As heat builds up during braking applications, for example, a controller determines when additional cooling may be needed. An air source is activated to induce air flow through at least one flow passage supported relative to the housing so that the air flowing through the passage can absorb heat from the lubricant. In one example, the air flow passage is supported within the component housing. In another example, the air flow passage is associated with a heat exchanger supported external to the component housing in a strategic location on the vehicle or the housing, for example. A pump responsible for causing the air flow preferably also causes lubricant flow in a desired manner to facilitate heat dissipation.

Abstract: A temperature controlling assembly includes a thermoelectric device that is supported on or in a selected driveline component, such as an axle assembly or a brake assembly. The thermoelectric device preferably is controlled to operate in a first mode to remove heat from the selected component. In one example, fluid within a wet disc brake assembly is cooled using the thermoelectric device. In another mode of operation, the thermoelectric device provides heat to a selected lubricant. A controller monitors the temperature of the chosen component and causes the thermoelectric device to operate in the appropriate mode to maintain the component temperature within a desired range.

Abstract: A vehicle driveline component temperature control assembly utilizes compressed air or another fluid to cause air flow across an external portion of the driveline component. The airflow facilitates heat transfer or heat dissipation from within the driveline component to assist in maintaining the temperature of the component within an acceptable range. A supply of compressed air or other fluid communicates with at least one discharge device supported on an external housing of the driveline component. The discharge device includes at least one manifold having at least one opening through which the compressed air is delivered to create an airflow across the external surface of the housing. In one example, each discharge device comprises multiple, generally C-shaped manifolds that are secured in place and supported on the external surface of the housing. The inventive arrangement is particularly useful for off-highway vehicle driveline components such as axle and wet disc brake assemblies.

Abstract: A system for controlling the temperature of a vehicle drive train component utilizes coolant that is normally used to cool an engine on the vehicle. At least one flow passageway is associated with the drive train component housing. Coolant from the radiator is selectively allowed to flow through the passageway where it absorbs heat from within the drive train component. The fluid is then returned to the radiator where heat can be dissipated in a conventional manner. A suitably programmed controller preferably controls the amount of coolant fluid flow through the component and controls a fan assembly associated with the radiator to ensure appropriate cooling of the fluid to achieve desired engine cooling and drive train component cooling.

Abstract: A vehicle drive axle is provided that includes a housing having a longitudinal portion defining a cavity. An axle shaft is supported within the cavity for rotation about an axis. The cavity is at least partially filled with oil. A plurality of spaced apart noncontiguous projections extend from the axle shaft in a direction transverse to the rotational axis. During rotation of the axle shafts, the projections extend into the oil within the cavity and splash the oil onto the upper portion of the axle housing. Increased heat dissipation is achieved by dispersing the oil throughout the cavity, and in particular the upper portion of the axle housing, where it radiates into the surrounding environment.