Abstract: The invention relates to heat exchangers for use in motor vehicles or for industrial use, for example, to heat exchangers for use as evaporators, condensers, oil coolers, intercoolers, heater cores, etc. The invention provides a heat exchanger comprising pairs of plates with each plate of the pair having formed on one side thereof a peripheral ridge, central ridge and channel dividing U-shaped ridges which are formed by forging or cutting. Each pair of plates are fitted together and joined, with channel recesses thereof opposed to each other to form a flat tube and a plurality of U-shaped divided fluid passageways in a U-shaped fluid channel inside the tube. Each pair of adjacent flat tubes are joined by spectacle-shaped header members interposed between the upper ends of the tubes and each comprising a front and a rear fluid passing tube portion and a connecting portion therebetween to provide a front and a rear header in communication with the upper ends of the flat tubes.

Abstract: A heat transfer system for transferring heat for use onboard a vehicle includes a conductor arranged to conduct exhaust gas discharged from an engine of the vehicle along a serpentine path to generate back pressure for transmission to the engine so that heat of exhaust gas flowing along the serpentine path is maximized. The heat transfer system includes a tube arranged to conduct fluid so that heat is transferred from the exhaust gas to the fluid.

Abstract: An auxiliary motor vehicle heater (10) is provided with a control device (22) which has a connection (30) for a voltage supply line (32) which leads from the battery (34) of the motor vehicle to the control device (22). In order to especially more easily determine information for an auxiliary motor vehicle heater (10) about the operating state of the engine (36) of the motor vehicle, the control device (22) is set up to detect the voltage characteristic on the connection (30) and to determine the information “starting of the engine (36) of the motor vehicle is completed” depending on the voltage characteristic.

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: An auxiliary heater for a motor vehicle equipped with a control device for controlling the operation of the auxiliary heater. In order to increase passenger protection in the motor vehicle, the control device is set up to detect a signal from at least one vehicle safety sensor, using the signal to detect the safety-critical state of the vehicle, and depending upon this detected status, ceases operation of the auxiliary heater.

Abstract: A heat transfer system includes a heat transfer passage in the vicinity of a source of dissipated heat on a satellite to collect heat dissipated by the source and a fluid loop including an evaporator having over part of its path a maximum surface area of its external walls in contact with external walls of the heat transfer passage.

Abstract: In a cover structure for restricting adhesion of foreign materials such as an antifreezing agent to a resinous tank of a heat exchanger, a cover member is arranged such that its first end is in the proximity of a boundary between a core portion and the resinous tank of the heat exchanger and its second end is adjacent to an opening through which air is introduced. The cover member blocks the foreign materials entering from the opening and restricts. Also, the cover member directs the air having passed through the opening toward the core portion. Thus, the tank is less likely to deteriorate due to adhesion of the foreign materials. Further, efficiency of heat exchange of the core portion improves.

Abstract: A temperature control system includes an enclosure having a plurality of adjoining walls. At least one inlet is disposed within at least one of the walls. The at least one inlet has an electrically controlled inlet fan associated with it. A plurality of outlet louver assemblies are disposed within at least an other wall and include a plurality of moveable louvers. An actuator is coupled with each outlet louver assembly to move the plurality of moveable louvers. An ambient air sensor is disposed within the enclosure for sensing the ambient temperature within the enclosure and providing an output signal which is conducted to an electrical processing circuit. Alternatively, the ambient air sensor may be located without the enclosure. Temperature sensors are also coupled with the engine, charge air and transmission cooler for sensing their respective temperatures and providing output signals which are conducted to the electrical processing circuit.

Abstract: A description is given of a module carrier for various diverse heat exchangers for a motor vehicle engine, which comprises a supporting frame, to which the coolant/air cooler and at least one air-conditioning condenser is fitted. The supporting frame comprises a lower part with a crossmember 2 as base and two side parts 3, 4 projecting vertically therefrom, to define upwardly open compartments 6, 7, 6′, 7′ in the lower part for the insertion of at least the coolant/air cooler and the air-conditioning condenser 9. These upwardly open compartments are closed off by an upper support 5, which interconnects the free ends of the side parts 3, 4 to form the supporting frame and which secures the inserted heat exchangers 8, 9 in their positions.

Abstract: In a heat accumulator for a vehicle having a double tank structure comprised of an outer tank and an inner tank, which define therebetween an evacuated space, each of the outer and inner tanks has an opening. The opening of the outer tank and the opening of the inner tank are welded to each other over the entire peripheries thereof. A means for restricting vibration of the inner tank is provided in the accumulator. At least when the vehicle is stopped, the outer tank and the inner tank are not in contact with each other at any portion other than the welded portion.

Abstract: A heat exchanger such as a heater is inserted into an air-conditioner casing and fixed thereto. Projected fixing members are formed at an opening of the casing through which the heater is inserted. The fixing member resiliently deforms to allow the insertion of the heat exchanger and automatically recovers its original shape to keep the heat exchanger at an inserted position. The fixing member may be formed in a hook shape having a sloped surface which is straightened when the heat exchanger is inserted and automatically recovers its original slope after the heat exchanger is fully inserted. Thus, the heat exchanger is easily inserted into the casing and firmly held therein without using parts for fixing the heat exchanger.

Abstract: A blow molded fan shroud (10) for use with an automotive cooling system is disclosed. The fan shroud (10) integrates a motor mounting ring or plate (20) for supporting a motor for driving the fan. The motor mounting ring or plate (20) is spaced from a front surface of the fan shroud (10) by a plurality of spiders (18). The spiders (18) are formed so as to include at least one portion with a hollow cross-section or chamber (22).

Abstract: A work vehicle having a body and a heater A/C unit disposed inside the body with a condenser assembly connected to the heater A/C unit has the condenser assembly disposed on a lateral side of the body, the condenser assembly includes: a first mounting bracket disposed on the side of the body; a second mounting bracket disposed on the side of the body; a third mounting bracket disposed on the side of the body; and a planar condenser disposed in a frame, wherein the frame is pivotally connected on a first side to the first mounting bracket, and a second side opposite to the first side has a right wing and a left wing, wherein the second mounting bracket detachably connects to the left wing and the third mounting bracket detachably connects to the right wing, and the condenser is connected to the heater A/C unit by a conduit.

Abstract: A compact heat exchanger system including a radial fan directing air flow outwardly away from the fan axis and a plurality of heat exchangers disposed around the radial fan. At least two of the heat exchangers include headers with longitudinal walls extending generally in the same direction as the fan axis with one of the heat exchangers disposed with its outlet header longitudinal wall adjacent the longitudinal wall of the inlet header of a second of the heat exchangers. A flow opening is provided between the adjacent longitudinal walls of the outlet header of the one heat exchanger and the inlet header of the second heat exchanger.

Abstract: A heat exchanger includes a honeycomb rotor, a drive unit and a gas movement device. The honeycomb rotor has at least two heat exchange passages and at least two purge zones provided respectively between the at least two heat exchange passages. The drive unit rotates the honeycomb rotor. The gas movement device circulates a gas through the at least two purge zones. The gas movement device may include a blower, and the drive unit may include a motor. In this case rotation of the blower can be synchronized with rotation of the motor. A vehicle drive device includes a power source that emits exhaust gas. The power source has a fuel battery having an air intake. Heat may be exchanged between the exhaust gas and air supplied to the air intake.

Abstract: An inside/outside air switching device for a vehicle is constructed of an integrated case and a rotary door. The case has an inside port and an outside port, and a plate rib protrudes inside the case from a portion between the inside port and the outside port. The rotary door has seal members protruding toward outside from a body plate of the rotary door. A clearance is provided between a wall surface of the case and a protrusion top end of the plate rib, so that the seal members of the rotary door can be displaced from a side of the inside port to a side of the outside port through the clearance when the rotary door is assembled from the inside port into the integrated case.

Abstract: An oil cooler for a vehicle with an automatic transmission that includes a core contained between two end pipes. A first one of the end pipes includes an oil inlet, for directing oil from the transmission, and an oil outlet, directing oil back to the transmission, and a dividing plate having a flow control orifice. An oil filter is positioned around the flow control orifice to filter the oil flowing through the orifice, thereby removing contaminants from the oil, while the oil flowing through the core is cooled.

Abstract: The device is used to cool a vehicle appliance, in particular a battery or a fuel cell, by means of a coolant. It has a plurality of identically designed cooling elements, through which coolant can flow, which can be brought into bearing contact to cool at least one component of the vehicle appliance. It includes a first cooling-element side and a second cooling-element side which is on the opposite side from the first cooling-element side. The cooling-element sides have connection openings, which form inlet and outlet openings for the coolant and are in communication with the interior space of the cooling element. In this arrangement, it is provided for the first and second cooling-element sides each to have at least two connection openings.

Abstract: A heat exchanger arrangement, especially for a vehicle heater, has a fluid flow space (30) surrounded by a housing arrangement (26, 28) as well as a temperature sensor arrangement (34) for detecting a variable related to the temperature of a fluid flowing through the fluid flow space (30). The temperature arrangement (34) includes at least one temperature sensor (36, 38), which is at least partially embedded in the material of a housing element (28) forming at least one part of the housing arrangement (26, 28).

Abstract: A system and method to control the coolant temperature of two independent cooling loops of a fuel cell vehicle by adjusting system pump speed, fan speed and radiator bypass valve position. Multiple feedback controllers coordinated by robust flip-flop logic are used, to minimize energy consumption and provide optimal control system performance even in the case of substantially different plant responses with respect to fan speed and valve position plant inputs. The system also includes a feed forward disturbance compensator, which reacts immediately to change in net power and vehicle speed disturbance variables, thereby reducing the variance of the temperature control error. Additionally, a feedback controller preset strategy is used to compensate for distinctive plant nonlinear effects such as bypass valve dead-zone and air-conditioning system's request for abrupt change of fan speed.

Abstract: A power take off assembly for a heat exchanger for a vehicle. The assembly includes a rectangular frame having passages all the vertical sides to marry with core tubes from the heat exchanger, a face plate with a hole to position the power take off sleeve, a back plate with a similar hole, and a sleeve to allow the power take off shaft to pass though the assembly when installed in a heat exchanger for an automobile/truck. The assembly is pieced together and tabs located on the perimeter of the frame lock the front and back plates into place, the sleeve is inserted in the holes, and the entire assembly is brazed in a one shot process.

Abstract: This invention provides a heat pipe including a plurality of pipe parts for performing at least one of absorption of heat and radiation of heat through an outer surface, which are adjacent toward one direction, a flat part including a heat transfer plane created in a flat form for performing at least one of absorption of heat from and radiation of heat into outer space, created on a part of the outer surface of each of the plurality of pipe parts to be integrated with each of the pipe parts, and a fin in a flat form continuing without an uneven part from the heat transfer plane included in the flat part for providing an heat transfer plane further extended from the heat transfer plane toward an adjacent pipe part.

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: In a brazed condenser for an air conditioner, a collecting tube connected with a collector is prefabricated as a one-piece tube. The collecting tube is connected by tack weld seams with the collector before brazing the collecting tube and the collector together.

Abstract: A mechanical control head system allows a vehicle user to control certain HVAC functions. The mechanical control head system includes a mounting plate, a faceplate, at least two user-adjustable actuators, at least two function interfaces and connections between the function interfaces and the HVAC module. The knobs provide the user a means to control, for example, the ambient temperature in the vehicle interior and the outside air circulation within the vehicle. The rotary cylinders can be coupled and uncoupled to the knobs in a single step instead of requiring individual steps for each knob.

Abstract: A heat transfer device includes a capillary-pumped first fluid loop including an evaporator situated on a satellite in the vicinity of a source of dissipated heat and a condenser connected by heat transfer members to the evaporator and situated on a deployable radiator panel of the satellite. The deployable radiator comprises at least two panels, and the heat transfer device itself further comprises at least one second capillary-pumped fluid loop. The fluid loops are connected in cascade with each other so that the evaporator of each fluid loop other than the first fluid loop is on the same panel as the condenser of the preceding loop and the condenser of each fluid loop other than the first fluid loop is on the panel next to that carrying the condenser of the first loop. The evaporator of one loop is connected to the condenser of the same loop by flexible heat transfer members.

Abstract: A heat exchange arrangement for a vehicle has at least two heat exchangers exposed to the action of ambient air. One of the heat exchanger is coolant cooler and the other one is a charge-air coolant. Each of these coolers has tubes through which liquid or gas flows and heat dissipating ribs connected to the tubes. The coolant cooler is positioned upstream of the charge-air cooler in the air-flow direction. The charge-air cooler has an overlapping region in which the coolant cooler and the charge-air cooler overlap one another and a non-overlapping region in which the coolant cooler projects substantially perpendicularly to the cooling air flow direction. The non-overlapping region is formed at least in the charge-air outlet region and is cooled directly by ambient cooling air. The overlapping region is cooled by the ambient cooling air that has passed through the coolant cooler, which is positioned immediately upstream of the overlapping region of the charge-air cooler.

Abstract: A heating system is provided for heating fresh water on boats, marine vessels and the like. The boat's water supply is connected to a hot water tank, which in turn is in fluid communication with a heat exchanger. The coolant line for a boat engine passes through the heat exchanger, through the hot water tank and back to the engine. Heat from the engine is transferred from the coolant line to the water in the hot water tank at a rate that varies with engine operation. The heat exchanger allows additional heat transfer to the water as the coolant and water pass through the heat exchanger. A sensor regulates circulation of water through the heat exchanger. The heat exchanger may be retrofitted externally of an existing hot water tank by connecting the heat exchanger to existing water lines for the hot water tank and to an existing engine coolant line to effect heat transfer from the engine coolant line.

Abstract: An LNG carrier for transporting LNG from one location to another that includes a vaporizer on board said LNG carrier for vaporizing the LNG to a gaseous state, one or more heat exchangers at least partially submerged in seawater, an intermediate fluid circulating between said vaporizer and said heat exchanger; and one or more pumps for circulating said intermediate fluid is disclosed. A method of regasifying LNG while on board an LNG carrier is provided that includes circulating an intermediate fluid between a vaporizer on board the LNG carrier and a submerged or partially submerged heat exchanger, heating the LNG to a temperature above its vaporization temperature using heat energy carried by said intermediate fluid and heating the intermediate fluid, using heat energy supplied by the submerged or partially submerged heat exchanger.

Abstract: A compact cooling system includes a mounting panel adapted to receive a plurality of at least three cooling units, a cooling fan, and a fan drive mechanism. The mounting panel supports the fan and drive mechanism in a manner allowing rotation of the fan about the axis of rotation. A front side of the mounting panel is adapted for receiving and supporting the cooling units in a pattern defining a cantilevered, tubular polygonal solid disposed about the fan. The mounting panel includes a convex central region extending into the tubular polygonal solid and receiving the drive mechanism in operative connection to the fan. By virtue of this arrangement, a very compact cooling system is provided. The tubular polygonal shape of the cooling units, when mounted on the mounting panel, forms an air duct for directing a flow of cooling air induced by the fan through the cooling units.

Abstract: A combined liquid tank and fan air flow housing is molded as a unit to combine needed functions in a compact preassembled unit. Separate spaced side tank portions are formed that are joined together with a front end tank to form a central opening with upper and lower ends. The opening is closed with a top plate that defines a plenum chamber and a lower fan support plate that forms a fan chamber in the central opening. A fan in the fan chamber creates an airflow from the exterior through the plenum chamber and out lateral ducts formed in the side tank portions. The inlet air flows through an oil cooler, water radiator and if desired, an air conditioner condenser in the plenum chamber. The tank formed is used for storage of hydraulic fluid.

Abstract: In an air conditioning apparatus, an air conditioning case has an upstream portion defining an air intake port through which air flows into the upstream portion substantially parallel to a core surface of a heat exchanger. The air intake port has a vertical dimension H1 that is smaller than a vertical dimension H2 of the core surface. The upstream portion has an air flow direction changing portion protruding inside of the upstream portion at a position opposite to the core surface above the air intake port. The air flow direction changing portion defines a clearance between the core surface and itself. A part of the air turned upward and further turned substantially parallel to the core surface strikes the air flow direction changing portion and flows toward the core surface through the clearance.

Abstract: Radiator assembly (10) for use on a spacecraft (12) is provided including at least one radiator panel assembly (26) repeatably movable between a panel stowed position (28) and a panel deployed position (36), at least two flexible lines (40) in fluid communication with the at least one radiator panel assembly (26) and repeatably movable between a stowage loop (42) and a flattened deployed loop (44).

Abstract: The device comprises a main loop (18) for cooling the fuel cell (12) and a secondary loop (20) for cooling at least the motor (10). These two loops (18, 20) form part of the same circuit which is traversed by a single refrigerant fluid and which comprises a section (22) common to the two loops on which a common pump (24) is mounted, and at least one regulation valve (38) is provided which is suitable for sharing the refrigerant fluid between the loops (18, 20) according to a chosen law. Application to electric and hybrid vehicles.

Abstract: A system and method for providing a transmission fluid heat exchanger which is external to an engine radiator, an in-line with respect to radiator hose coupled to the engine radiator.

Abstract: The invention provides a passive cooler for a detector on board a satellite; the cooler comprises a sunshade, a sunshade radiator forming the end of the sunshade, an infrared deflector at the end of the sunshade, and a radiator forming the end of the deflector. According to the invention, the sunshade has an elliptical base and forms a constant angle relative to the axis of the cooler. The deflector also presents a base that is elliptical. The invention makes it possible to improve the thermal performance of the cooler by making use of all of the volume available for the cooler.

Abstract: The present invention provides anchor tabs at opposite ends of a film member that are anchored to side faces of a door plate of a sliding door. Draft deflectors prevent the inflow of air to between the anchor tabs and the side faces of the door plate. Thus, inflow of air to between the anchor tabs of the film member and the side faces of the door plate is prevented. Also, fluctuations in pressure difference between the inner and outer sides of the anchor tabs are suppressed, and the production of extraneous noise caused by self-excited vibration of the anchor tabs at the ends of the film member is suppressed.

Abstract: Motor vehicle comprising a passenger compartment (12), a front compartment (14), which is arranged in the front of the passenger compartment (12), and a heat exchanger unit (16), comprising an engine cooling radiator arranged in the area separating the passenger compartment (12) from the front compartment (14). The motor vehicle comprises a manifold for conveying a flow of air (22), with an air flow inlet section (28) arranged in the front part of the motor vehicle and an air flow outlet section (30) arranged in the rear part of the front compartment (14), in correspondence to said heat exchanger unit (16).

Abstract: One object of the present invention is to realize a heat discharger having a high precision and in which heat conduction efficiency is maintained at the bonding between the heat pipe and heat sink. A heat discharger comprises a heat pipe and a heat sink formed separately from the heat pipe and bonded to the heat pipe via solder. The contact surface portion between the heat pipe and the solder and the contact surface portion between the heat sink and the solder are made of a wettable material having a wettablility such that the contacting angle with respect to the solder is 90 degrees or less.

Abstract: In a multimedia information and control system for use in an automobile, at least one interface is employed which enables a user to access information concerning the automobile and control vehicle functions in an efficient manner. The user may select one of a plurality of displayed options on a screen of such an interface. Through audio, video and/or text media, the user is provided with information concerning the selected option and the vehicle function corresponding thereto. Having been so informed, the user may activate the selected option to control the corresponding vehicle function.

Abstract: A heating and/or air conditioning system for an interior of a vehicle has a central heating and/or cooling device and a decentralized air-conveying device which includes a plurality of air-conveying units arranged locally in the vehicle interior. In order to permit good regulation of the heating and/or air conditioning system and efficient air conditioning, respective air-conveying units of the decentralized air-conveying device are arranged in a plurality of subspaces of the vehicle interior for circulating air in the respective subspaces.

Abstract: A motive power system for an electric vehicle has a drive train connected to one or more drive wheels of the vehicle. The motive power system has an electrical motor having a motive power output connection for attachment to the drive train. A first heat exchanger has thermal connection to the electrical motor to remove heat from the electrical motor, the first heat exchanger employing a coolant fluid. A second heat exchanger is in thermal contact with the coolant fluid and with an ambient atmosphere for removing heat from the coolant fluid.

Abstract: A door and housing assembly for controlling air flow through the housing. The housing is adapted to be mounted in a ventilating system for controlling the direction and flow of air passing through the system. The door is actuated to move between two end positions where the respective air pathways are each sealed. The door can be positioned at any location between the end positions to control air flowing to the respective air pathways. The door includes guide pins on edges thereof that move along slots located in the inner sidewalls of the housing and guide the door between its end positions to locate the door in selected intermediate positions thereof. The slots for guiding the door may be steeply angled with respect to the seals so as to create minimal wiping of the respective seals upon engagement and dis-engagement between the door and seals at end positions of door travel.

Abstract: An internal combustion engine in a hybrid electric vehicle powers an alternator or generator, providing current while the engine's cooling system supplies heat to warm or cool the batteries in a thermostatically controlled manner. Further embodiments utilize heat from the exhaust and catalytic converter to maintain the engine's temperature at an efficient level, and increase the amount of usable heat energy within the system. Organized compartmentalization and insulation of system components controls storage, distribution and release of heat energy during operation and shut-down for increased efficiency and reduced pollutant emissions.

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: A compact vehicle heating system and method is provided which includes mechanisms to selectively shut down heating systems. For example, when domestic hot water is required, space heating and engine preheating systems can be shut down in order to provide priority heating to the domestic hot water. When the demand for domestic hot water is lower, the space heating and engine preheat systems can be reactivated.

Abstract: A first cooling system is formed in a motor-assist device for a vehicle such that a motor housing including a motor is provided with a cooling path communicating with a cooling path in an engine, and the former cooling path is connected to a radiator, a water pump and the engine in that order. A second cooling system for cooling an inverter, which is separate from the first cooling system, is provided in the rear of the vehicle. The second cooling system includes a water pump and a radiator mounted on a lateral rod brace. Accordingly, the size of the second cooling system can be determined based on the amount of heat generated only in the inverter.

Abstract: A heat exchanger tube for use in a vehicle, including a tube extending in an axial direction and having an end. The end has a first and second appendage attached to it. The first and second appendages are spaced from one another such that the second appendage does not form an enclosed space with the first appendage.

Abstract: A compact cooling system includes a mounting panel adapted to receive a plurality of at least three cooling units, a cooling fan, and a fan drive mechanism. The mounting panel supports the fan and drive mechanism in a manner allowing rotation of the fan about the axis of rotation. A front side of the mounting panel is adapted for receiving and supporting the cooling units in a pattern defining a cantilevered, tubular polygonal solid disposed about the fan. The mounting panel includes a convex central region extending into the tubular polygonal solid and receiving the drive mechanism in operative connection to the fan. By virtue of this arrangement, a very compact cooling system is provided. The tubular polygonal shape of the cooling units, when mounted on the mounting panel, forms an air duct for directing a flow of cooling air induced by the fan through the cooling units.

Abstract: An auxiliary engine generates electricity through an alternator, to charge the vehicle battery and selectively run an electric motor for air conditioning when the vehicle's primary engine is not operating. Operation of the electric motor produces rotation of the drive shaft of the vehicle's air conditioning compressor, the output shaft of the electric motor being connected via a centrifugal clutch, and a drive belt on a pulley integral to the clutch, to a pulley bolted directly to the drive shaft of the compressor. There is no use made of the vehicle's existing electromagnetic clutch at the compressor location, i.e. it remains disengaged when the auxiliary system is operating, and is engaged only when air conditioning is called for in normal vehicle operation, i.e. when the primary engine is running. The electricity generated by the auxiliary engine can also be used to operate other accessories, if desired, such as lighting, televisions, VCRs, refrigerators and other like accessories.