Abstract: The present invention is a heat exchanger for a motorcycle which is adapted to be installed on the motorcycle in a substantially horizontal orientation. Also, the present invention is a heat exchanger for a motorcycle which is adapted to be installed on the motorcycle beneath the engine and/or beneath the crankcase and/or beneath the oil pan and/or beneath the gearbox. Preferably, the heat exchanger is made with finned tubular core elements. At the location under the motorcycle, the thinness of the heat exchanger is important, so preferably it is made with thin hollow plates. Preferably, the heat exchanger is installed in a suspended maimer beneath the motorcycle, so that cooling air may pass effectively over its top and bottom surfaces. Preferably, the heat exchanger is an oil intercooler.

Abstract: Systems and methods for a temperature control loop in a vehicular engine compartment to concurrently cool at least two devices with a single fluid supply source when each device requires the cooling supply fluid to have a distinct temperature. The supply fluid, having a first temperature, can be simultaneously routed through a primary heat exchanger and a mixing valve. The primary heat exchanger cools the first temperature fluid to produce a second temperature fluid. The mixing valve controllably receives at least some of the first temperature fluid and some of the second temperature fluid discharged from the primary heat exchanger and mixes the respective fluids to produce a third temperature fluid. The second temperature fluid not diverted to the mixing valve is used to cool a first device located downstream of the primary heat exchanger. The third temperature fluid is used to cool a second device located downstream of the mixing valve.

Abstract: A heat exchanger for a motor vehicle, particularly a motorcycle in which a bent cooling element is disposed between a first and second collector tank. The bent cooling element is provided with a longer and a shorter side as well as lateral connecting planes for joining the cooling element to the collector tanks. The collector tanks are made of a material that has substantially lower strength than the material of the cooling element.

Abstract: A heat exchanger for a vehicle engine includes a pair of tanks for supplying a coolant through a thermostat for adjusting opening/shutting depending on the temperature of the coolant and a water pump, and discharging the cooled coolant to an engine side; a header at one side coupled with the tank at one side, to which the coolant is supplied; heat exchange tubes which are structurally fastened to communicate with the heater at one end portion thereof, and arranged in parallel to a direction of driving wind; a header at the other side coupled with the tank at the other side, which is structurally fastened at the other end portion of the heat exchange tube to communicate therewith so as to discharge the coolant into the engine; and a core portion including fins fixedly brazed between the heat exchange tubes.

Abstract: The present invention relates to a heat exchanger for a vehicle, and more particularly, to a highly efficient thin heat exchanger for reducing the weight of a vehicle body and enhancing heat radiation performance. In the present invention, there is provided an optimal design range for maximizing heat radiation performance of the radiator using a concept of thermal resistance.

Abstract: A multiple-pass heat exchanger having opposing headers with beveled end walls, one header having nozzles on opposite sides of a separator wall for delivering heat exchange fluid at one temperature from one or more nozzles on one side of the separator wall, the heat exchanger having one set of fluid flow tubes for conveying the fluid in one direction to the other header and another set of fluid flow tubes for carrying the fluid in the opposite direction from the latter header for delivering to the header with a nozzle or nozzles for discharging the fluid from the latter header at a changed temperature. There is also disclosed a multiple systems combined heat exchanger having an opposing headers with beveled end walls, wherein at least two heat exchangers independent of each other share the respective headers which are divided from each other by separator walls.

Abstract: A waste energy-based vehicle air conditioning system includes efficient compression driving means coupled to refrigeration means, which greatly reduces the extra fuel otherwise required to operate conventional vehicle air conditioning systems. In one implementation, the compression driving means includes a controller (e.g., magnetic clutch) that couples mechanical waste energy from an engine fan axle, a vehicle drive shaft, or a transmission shaft directly to an axle of a refrigerant compressor. Alternatively, the controller can also include a battery that is charged from the mechanical waste energy. Upon detecting the presence of vehicle waste energy, such as the driver's foot releasing from a gas pedal, the controller powers the refrigerant compressor with a rotating axle (e.g., during deceleration) or with the vehicle's battery power, as appropriate. One or more kits can be used to retrofit existing vehicles to operate the respective air conditioning systems principally on waste energy.

Abstract: A heat exchanger extracts heat from a two-phase fluid coolant so that the coolant changes from a vapor state to a liquid state. Two valves have respective inlets which communicate with the coolant in the heat exchanger, and which are physically spaced from each other. Valve control structure responds to the presence of liquid at the inlet to either valve by opening that valve, so that the liquid coolant flows through the valve to a discharge section. A different feature involves a housing with a heat exchanger therein, the heat exchanger having a plurality of coolant conduits that are axially spaced. A flow of air travels axially within the housing, then flows transversely past the conduits to the other side thereof, and then resumes flowing axially on the other side of the conduits.

Abstract: A keel cooler having a standard header with an internal beveled bottom wall, with orifices on the inner wall of the exterior tubes extending into the header, the orifices being in the natural flow path of the coolant flow. The orifices are sufficiently large so as not to restrict the flow of coolant. A fluid flow diverter is additionally provided in the header of the keel cooler for facilitating coolant flow towards both the interior tubes and also towards the exterior tubes.

Abstract: The invention relates to a method and apparatus for enhancing the heat transfer efficiency of a keel cooler by increasing the flow rate of coolant through the side tubes. Because the side tubes are exposed to a greater amount of fresh unhindered seawater, increasing the flow rate through the side tubes can have the effect of enhancing the overall heat transfer capability of the keel cooler. The invention relates to using apertures leading to the side tubes from the header and vice versa that are substantially arrow-shaped in design, wherein various benefits that lead to an increased flow rate are provided. The aperture is preferably symmetrically shaped so that a single die can be used to cut the aperture onto both side walls of the header.

Abstract: A header for a heat exchanger, the header having a beveled closed end portion.

Abstract: The invention relates to a front part of a motor vehicle having a fender unit which comprises a front fender which is covered on the outside by a fender covering, and which is connected in its lower region to a bottom supporting structure of the motor vehicle, an air guiding part being arranged underneath the fender. According to the invention, in the event of a head-on impact the air guiding part interacts with the fender covering and stiffens it in a region which is positioned in front of the fender, the air guiding part being supported on the bottom supporting structure.

Abstract: An oil cooling apparatus having at least two sides. Extending from a first side and integral therewith is a first scoop defining a first duct. Extending from a second side and integral therewith is a second scoop defining a second duct. Within the first and second ducts are oil coolers having fins which allow heat to be removed from the oil as air passes through the duct during operation of the, for instance, motorcycle. After moving through the first and second oil coolers, the oil is deposited within the oil tank until it is recirculated through an engine.

Abstract: An integrated engine guard oil cooler is mounted to a motorcycle. The cooler is a hollow tube having an inlet, an outlet, a plurality of cross-sectional restrictions in its interior, and a plurality of radial cooling fins on its exterior. The tube has a shape such that, when the inlet and the outlet are mounted on opposite sides of the lower frame of a motorcycle, the tube extends outwardly from each side of the frame, then extends upwardly, and then extends inwardly to join and form an enclosed passageway. When the inlet and the outlet communicate with the oil reservoir of the engine, oil flows through the tube with successive pressure increases and pressure decreases as it passes the cross-sectional restrictions and heat from the oil is transferred to the ambient air through the radial cooling fins.

Abstract: A passive cooling system for an auxiliary power unit (APU) installation on an aircraft is provided. The system is for an auxiliary power unit having at least a compressor portion of a gas turbine engine and an oil cooler contained separately within a nacelle. The system includes the auxiliary power unit housed within the nacelle of the aircraft, an engine exhaust opening defined in the aft portion of the nacelle and communicating with the gas turbine engine, at least a first air inlet duct communicating with a second opening defined in said nacelle and with said compressor portion and the oil cooler is located within a second duct communicating with an opening other than the engine exhaust opening of said nacelle and with the engine exhaust opening. Exterior cooling air and engine exhaust ejected through said engine exhaust opening entrain cooling air through said second duct to said oil cooler, and thus provide engine oil cooling. An exhaust eductor is also provided.

Abstract: A keel cooler having a standard header with an internal beveled bottom wall, with orifices on the inner wall of the exterior tubes extending into the header, the orifices being in the natural flow path of the coolant flow. The orifices are sufficiently large so as not to restrict the flow of coolant. A fluid flow diverter is additionally provided in the header of the keel cooler for facilitating coolant flow towards both the interior tubes and also towards the exterior tubes.

Abstract: A fluid cooling arrangement for a motorcycle including a fluid cooler with an outer housing and an inner plate. The outer housing includes an outer face and an inner face. The inner plate is mounted to the inner face of the outer housing. A continuous fluid passage is defined between the inner face and the inner plate, and the fluid passage extends between a fluid inlet and a fluid outlet. The fluid cooler mounted to a primary drive of a motorcycle. The primary drive connects an output shaft of the engine with an input shaft of a transmission. The fluid inlet is in fluid communication with a source of heated fluid from the engine.

Abstract: A keel cooler having a standard header with an internal beveled bottom wall, with orifices on the inner wall of the exterior tubes extending into the header, the orifices being in the natural flow path of the coolant flow. The orifices are sufficiently large so as not to restrict the flow of coolant. A fluid flow diverter is additionally provided in the header of the keel cooler for facilitating coolant flow towards both the interior tubes and also towards the exterior tubes.

Abstract: A marine air conditioning system for installation on a boat has a compressor, a water-cooled condenser, and an evaporator. The compressor is directly driven by an engine used for propelling the boat. The condenser is installed inline in a cooling-water intake tube, through which a pump draws water from outside of the hull for cooling the engine. Water from the intake tube is drawn through a portion of the condenser in thermal communication with the refrigerant for transferring heat from the refrigerant to the water. The water then continues into and through the engine and is exhausted through a discharge tube. The refrigerant then passes through an orifice or an expansion valve, and then into the evaporator. Air is passed through the evaporator for cooling the air, and the refrigerant returns to the compressor for recirculation in the system.

Abstract: A passive cooling system for an auxiliary power unit (APU) installation on an aircraft is provided. The system is for an auxiliary power unit having at least a compressor portion of a gas turbine engine and an oil cooler contained separately within a nacelle. The system includes the auxiliary power unit housed within the nacelle of the aircraft, an engine exhaust opening defined in the aft portion of the nacelle and communicating with the gas turbine engine, at least a first air inlet duct communicating with a second opening defined in said nacelle and with said compressor portion and the oil cooler is located within a second duct communicating with an opening other than the engine exhaust opening of said nacelle and with the engine exhaust opening. Exterior cooling air and engine exhaust ejected through said engine exhaust opening entrain cooling air through said second duct to said oil cooler, and thus provide engine oil cooling. An exhaust eductor is also provided.

Abstract: An radiator and charge-air-cooling package made up of two air cooled heat exchangers: a radiator and a charge-air-cooler, the heat exchangers being attached to one another directly or indirectly and then attachable to a chassis or body of the vehicle. The two heat exchangers are both longer than wide with each having center cooling areas. Each heat exchanger has cooling cores in which their coolant flows. Air passes across these cooling cores when the vehicle moves to cool the coolant. The long sides of each of the heat exchangers are geometrically out of synch with the other. With the center cooling areas of each of the heat exchangers overlapping each other, at least one end of each heat exchanger may be unfettered by air flow the other heat exchanger.

Abstract: A cooling air system for motor vehicles has a radiator that is arranged in a front-end area of a motor vehicle and through which a cooling air stream flows. The exhaust air stream exiting from the radiator is directed beneath the motor vehicle by outlets that are arranged on the bottom of the motor vehicle. The outlets can be covered by an air guide element. In order to create a cooling air system for motor vehicles that has a simple design and simultaneously ensures favorable guidance of the cooling air, in the case of a motor vehicle whose outlets for cooling air can be covered by an air guide element, to arrange the air guide element in such a way that the exhaust air stream flowing out of the air guide element is directed basically parallel to one of the air streams flowing around the front end of the car.

Abstract: A keel cooler having a beveled bottom wall, with orifices on the inner wall of the exterior tubes extending into the header, the orifices being in the natural flow path of coolant flow. The orifices are sufficiently large so as not to restrict the flow of coolant. The anode assemblies and drain plugs are mounted on the beveled bottom wall.

Abstract: The invention relates to a method and apparatus for enhancing the heat transfer efficiency of a keel cooler by increasing the flow rate of coolant through the side tubes. Because the side tubes are exposed to a greater amount of fresh unhindered seawater, increasing the flow rate through the side tubes can have the effect of enhancing the overall heat transfer capability of the keel cooler. The invention relates to using apertures leading to the side tubes from the header and vice versa that are substantially arrow-shaped in design, wherein various benefits that lead to an increased flow rate are provided. The aperture is preferably symmetrically shaped so that a single die can be used to cut the aperture onto both side walls of the header.

Abstract: An air conditioning system for a vehicle. The air conditioning system has a compressor and an evaporator. The compressor is driven by a vehicle engine and a motor separately operable from the vehicle engine. The evaporator is disposed in a predetermined air passage to cool the air. The air conditioning system comprises an intake door, predicting means and switching means. The intake door is disposed upstream of the air passage and is switched between a first position and a second position. The intake door is arranged to introduce ambient air from outside of the vehicle in the first position and interior air from inside the vehicle in the second position. The predicting means is disposed for predicting a non-operating state of the vehicle engine. The switching means is disposed for switching the intake door to the second position based on a prediction of the predicting means.

Abstract: A closed coolant circulating system for a watercraft, for traveling along a surface of a body of water, containing a supply of coolant that is caused to flow through the coolant circulating system. The watercraft comprises a hull and an engine. The watercraft also comprises a heat exchanger formed from heat conductive material and having a fluid path defined therein with an inlet port and an outlet port. The heat exchanger has a heat exchanging exterior surface and is mounted to the hull such that the heat exchanging exterior surface constitutes a portion of the exterior surface of the hull that is normally disposed below the surface of the body of water. The heat conductive material of the heat exchanger allows the heat absorbed by the coolant to dissipate from the coolant to the body of water via the heat exchanging exterior surface as the coolant flows through the fluid path.

Abstract: An inverted aircraft internal combustion engine, such as a two-stroke compression-ignition (diesel) engine, incorporates a lubricant (oil) and/or coolant heat exchanger mounted upon the engine below an exposed crankshaft and/or enclosed crankshaft housing and adjacent a propeller mounting location.

Abstract: A first pipe 231 and a second pipe 232 are connected so that at least one of connectors 233 and 234 is located in a through-hole 133, in a state in which both the connectors 233 and 234 are connected. In this way, since the through-hole 133 is brought to a state of being filled in by the connector 233, the gap between a refrigerant pipe 230 and the edge of the through-hole 133 can be considerably reduced. It is, therefore, possible to prevent hot air from moving to the front side of a vehicle, in front of a panel 100 through the gap between the refrigerant pipe 230 and the edge of the through-hole 133 without the necessity of filling in the gap with a filling means such as rubber (a grommet) and packing.

Abstract: The invention provides an air-liquid heat exchanger for a motor vehicle fluid-flow circuit (2, 3), the heat exchanger comprising a plurality of tubes (4) extending between two fixing and distribution blocks (5, 6) to which the ends of the tubes are coupled, each of said two blocks comprising: a face (10, 13) facing the other block and carrying internal coupling members (15) for coupling the corresponding ends of the tubes (4) to the block in question; an internal distribution channel (17) interconnecting the internal coupling members (15); and an external coupling member (19) for coupling the block in question and its internal distribution channel (17) to the fluid-flow circuit (2, 3) of the vehicle. At least one (5) of the two blocks has at least one ventilation nozzle (23) passing therethrough between its face (10) carrying the internal coupling members (15) for coupling tubes (5) to said block, and its opposite face (9).

Abstract: A double-row heat exchanger coil includes intertwined inner and outer loops. The loops are situated to allow one continuous coil to be wound in an uninterrupted coiling operation, and later cut at several locations to create several individual circuits that are readily connected to each other in a parallel flow relationship.

Abstract: A vehicle heater of the type that uses diverted engine coolant is provided with an accelerated warm up process that takes the coolant to a temperature suitable for passenger space heating more quickly. The fan that normally pulls outside air through the front end grill is, after vehicle start up, run in reverse, so as to actually retard the flow of air through the grill. The net effect of a separate structure that physically blocks air flow is achieved merely by using existing components in a new way.

Abstract: An engine cooling apparatus adopting a separate type radiator so as to make it possible to reduce the number of parts and simplify the internal structure of a water pump by connecting left and right radiators to a water pump. One end of a laterally-extending connecting pipe mounted across the engine in right and left directions is connected to a water pipe provided at an outlet tank of a left radiator, while the other end thereof is coupled with a joint pipe provided at an outlet tank of a right radiator. Water supplied from the left radiator flows through the laterally-extending connecting pipe and meets water flow from the right radiator in the outlet tank. A water pump sucks the water collected in the outlet tank through a water duct via a water pipe provided in the lower part of the outlet tank, and pressurizes the water and supplies it to a water jacket of the engine.

Abstract: An open motor vehicle, such as a convertible or a roadster, has at least one vehicle seat accommodated in a vehicle interior. A wind partition is assigned to the at least one vehicle seat and is arranged behind the backrest covering at least the headrest area. A heating system which has at least one heat exchanger through which at least a portion of the air flows which reaches the wind partition. For supplying the headrest area with warm air during a drive with an open top without an intervention in the wind partition and an impairment of the design, the at least one heat exchanger is integrated in a shaft constructed in the vehicle interior behind the backrest. The shaft is provided with an air inflow device which is situated upstream of the heat exchanger and with an air outflow device situated downstream of the heat exchanger.

Abstract: A wind partition arrangement for two-seat open motor vehicles, such as roadsters or convertibles, has an essentially vertically aligned wind partition which covers the headrest area behind the backrests. A covering part which is essentially horizontally aligned covers the clearance between the wind partition and the rear wall of the vehicle occupant compartment. A heat exchanger is provided through which at least a portion of the air flows which arrives in the headrest area. For the purpose of implementing a wind partition in a compact construction with the advantageous warm air supply to the headrest area without an intervention in the wind partition itself, the covering part is constructed as a function element for guiding air which is connected with the heat exchanger and has two air outlet nozzles which are each assigned to a vehicle seat and which are arranged directly below the wind partition and have an air outflow direction aimed at the headrests.

Abstract: An outboard marine heat exchanger comprises a plurality of cooling tubes positioned between opposing headers. Each header is equipped with a header flange having a plurality of fastening components. The fastening components are designed to mate with corresponding fastening components of a mating flange. In one embodiment, the mating flange interfaces with a pipe stub extending outwardly from a marine vessel hull. The header flange can then be attached to the mating flange to connect the heat exchanger to the cooling system of the vessel engine without the need to access the interior of the hull.

Abstract: A method and an apparatus for providing a cooling or a condensing of a hot fluid received from a heat generating apparatus using a cooling apparatus or a condenser. The apparatus includes a hollow cooling or condensing pot (6) having an inner cavity (10) providing an axial through channel in the pot (6). There is at least one cooling sling (12) in the cavity and/or adjacent the walls or inside the walls (13) of the pot (6). The cooling or condensing pot (6) is formed for mounting on a hull lead-through (4) with one end thereof, or as a lead-through of a water craft. This lead-through exteriorly opens underneath the level of the surrounding sea water (3). The second end (2) of the cooling or condensing pot (6) is arranged for being connected to a tube or hose which is open upwardly, for instance a drainage hose (2) of a sink (1) or a similar device.

Abstract: A heat exchanging system includes two cooling fans for cooling heat exchanging medium of a heat exchanger, and a control device for controlling rotational speeds of the cooling fans. The control device is attached to an outer surface of a fan shroud so that radiation fins of the control device is disposed inside the fan shroud. Further, the radiation fins of the control device is disposed between two fan accommodating portions each having a cylindrical shape. That is, the control device is disposed in a comparatively large space formed by two fan accommodating portions. Therefore, the control device can be readily attached to the fan shroud on a vehicle, and the size of the radiation fins can be made larger. Thus, the heat exchanging system cools the control device sufficiently while improving ventilation performance of the cooling fans.

Abstract: A marine heat exchanger has a low profile header and cooling tube configuration to minimize drag and maximize heat transfer during use. The cooling tubes extend from at least an underside of the header so that the header vertically disposed cross sectional area is minimized and the cooling tubes are exposed to flowing seawater prior to or along with the headers. The tubes can also extend forwardly of the header to further maximize heat transfer and minimize drag. The header construction is especially adapted for hulls without recesses for header containment.

Abstract: The invention is directed to apparatus and a method for controlling temperature of lubricant contained in, but not limited to, a differential housing. The apparatus includes a cover plate having an air duct arrangement that includes an intake manifold, a discharge and at least one air conduit that extends between the intake manifold and the discharge. The air conduit communicates with the outside surface of the cover plate, and a temperature responsive fan selectively forces air into the manifold to create an airflow along the air conduit. Heat is transferred from the cover plate surface to the air as the airflow moves through the air conduit and the heated air is expelled at the discharge to lower and control lubricant temperature.

Abstract: A variable area inlet structure for a vehicle utilizing ram air for coolant is described which comprises a variable area inlet device in the ram air inlet in the form of a butterfly valve, damper, shutter, or similar structure, a temperature sensor in thermal contact with a component within the vehicle to be cooled by ram air flow, a controller and actuator, responsive to the temperature sensor and operatively connected to the variable area device, for controlling the inlet area in response to the component temperature.

Abstract: Novel apparatus and methods for cooling a watercraft internal combustion engine which supplies rotational force to a drive unit attached to the watercraft are described. The apparatus comprises a heat exchanger connected to or integral with the drive unit, the heat exchanger having therein a hollow loop connected to the engine cooling system for circulating a flow of fluid from the cooling system through the loop and thence back to the cooling system. The heat exchanger is adapted to be disposed in thermally-conductive heat exchange contact with water when the watercraft is being propelled by the drive unit. In a preferred embodiment, the heat exchanger extends from the watercraft in a substantially horizontal plane which is no lower than the bottom of the watercraft, is disposed above a propeller connected to the drive unit, and is sized and configured to deter cavitation around the propeller.

Abstract: To increase the surface area of an oil cooler and improve the cooling efficiency of an engine for a motorcycle, dual radiators are mounted on the body frame on both right and left sides of a water-cooled engine. Both radiators are inclined relative to a center line of the motorcycle with the larger space between the top ends thereof than the space between the bottom ends thereof on both sides of the engine. Also, the forward portions of the radiators project forwardly from the front end of the engine. An air-cooled oil cooler is provided at the upper space between both radiators in front of the engine and extends laterally across the width of the engine. Furthermore, a cooling system incorporates the radiator and oil cooler configuration.

Abstract: A liquid coolant heat exchange system for use in semimonocoque aircraft includes an arcuate planar heat sink fixed along a radius of curvature R.sub.1 by forming members, a flexible arcuate planar spreader plate having a radius R.sub.2, such that R.sub.1 >R.sub.2, a heat exchange tube for transferring heat from the liquid coolant to the heat sink and means for attaching the spreader plate to the forming members to hold the spreader plate in contact with the heat sink.

Abstract: A heat exchanger of the plate fin and tube type which comprises two longitudinally extending sections. The two sections each have a planar cross section and form a continuous length. The sections are bent relative to one another with the planar cross sections of the two sections forming an angular relationship therebetween in two different planes. In a preferred embodiment, a further bend is made thereby forming a third longitudinally extending section.

Abstract: A duct apparatus for drawing a flow of air into a heat exchanger assembly of an automotive vehicle and directing the flow of air exiting the heat exchanger assembly away from the vehicle engine is disclosed. The apparatus includes a generally rectangular body extending across the entire length of the heat exchanger assembly and partially enclosing it. The apparatus further includes a plurality of vanes disposed in the body adjacent the heat exchanger assembly, the vanes directing the flow of air exiting therefrom, a pair of generally curvilinear plenums each in fluid communication with the body and extending longitudinally therefrom. Each of the plenums includes an exit end for directing air exiting therefrom to ambient air and a fan assembly for drawing air through the heat exchanger assembly.

Abstract: An oil cooling apparatus for cooling oil contained in a motorcycle engine of a motorcycle includes a housing having a front wall, a bottom wall extending rearwardly from the front wall, and a pair of spaced apart side walls which attach respective sides of the front and bottom walls. The housing further includes an opening for accessing the interior of the housing, a plurality of inlet louvers formed in the front wall and a plurality of outlet louvers formed in the bottom wall. The arrangement is such that air enters the interior of the housing via the inlet louvers and exits the interior of the housing via the outlet louvers. A bracket mounts the housing on an engine of a motorcycle in a position such that the opening of the housing generally faces the engine. A radiator contained within the engine of the motorcycle is provided for cooling the motorcycle's engine. Tubing, in fluid communication with the engine whereby oil flows therethrough, is disposed within the radiator.

Abstract: An amphibian motor vehicle comprises a watertight engine room formed in a lower part of a vehicle body, an air intake opening formed at a front part of the vehicle body such that the air intake opening is positioned above water level when the amphibian motor vehicle cruises on water, an air passage separated from the engine room and generally extending in a longitudinal direction of the vehicle body from the air intake opening and a radiator disposed in the air passage for air cooling a coolant flowing into the radiator from the engine.

Abstract: The inlet and outlet passages communicating with a water-cooled engine oil cooler for a vehicle, such as a motorcycle, are arranged for bypass of a regulated amount of oil from the inlet passage to the outlet passage to enhance the flowability of the cooled oil. Provision is made for a replaceable flow control orifice between the oil inlet and outlet passages to regulate oil viscosity. Also described is an arrangement providing for mounting the cooler to the crankcase or oil pan surface whereby air flowing past the cooler during movement of the vehicle assists the effects of the cooling liquid.

Abstract: An oil cooling device for a motorcycle engine operating by convection heat transfer with air outside the device. A fin arrangement may be included to enhance the rate of heat exchange. The device conforms to forward portions of the motorcycle frame. The location of the device allows air needed to cool the engine to flow by the device uninhibited. This location is also unobtrusive and thus does not detract from the motorcycle's overall appearance. The oil cooling device is activated by a thermovalve which opens whenever a chosen temperature range is attained. This device could be incorporated into a motorcycle at manufacture or be configured for addition to a motorcycle to improve oil cooling as an auxiliary oil cooler.

Abstract: An inlet air passage in the aerodynamically configured front end of a motor vehicle directs an inlet air stream at an inclination upwardly from the bottom of the front end of the vehicle and across a radiator for cooling engine coolant and wherein the radiator has coolant tubes and air centers for forming air flow passages through the radiator between spaced headers. The tubes are inclined with respect to the vertical headers at an angle selected to locate the air flow passages parallel to an inlet air stream for aligning the inlet air stream with the air flow passages for reducing air pressure drop across the radiator.