Abstract: A multiple temperature control system for a motor vehicle comprises a plurality of supplemental heat sources downstream from the air conditioner/heater unit which may be controlled to provide extra-heated air to either the driver position or the passenger position within the passenger compartment of the motor vehicle.

Abstract: A climate control system for an electric vehicle includes a programmed microcomputer for controlling the pre-conditioning of the vehicle prior to usage as well as heating, ventilating and air conditioning of the vehicle under normal operating conditions. The microcomputer responds to a plurality of vehicle operator inputs and sensor inputs and provides outputs to control the speed of the compressor, condenser fan and blower fan, and the position of a temperature blend door and a Fresh Air/Recirculating Air door to optimize the use of electrical energy.

Abstract: A heater core 21 is connected to an engine cooling water line via an inlet passageway 43 and a return passageway 45. A first valve 25a is provided for controlling the amount of high temperature water introduced to the heater core 21, and a second valve 25b is provided for a re-circulation of low temperature water that has passed through the heater core, via a re-circulation passageway 46. The amount of high temperature engine cooling water supplied to the heater core 21 and the amount of low temperature cooling water from the heater core 21 passed through the return passageway 46 are controlled by an on-off manner control of the first and second valves 25a and 25b, respectively, and thus a ratio of a mixture of the high temperature water and the low temperature water, which corresponds to a time average value of the temperature of the cooling water introduced into the heater core, is controlled in accordance with a duty ratio of the on-off signals operating the valves 25 a and 25b.

Abstract: An automobile air-conditioner wherein a controlled variable used to determine the control mode of a component of the air-conditioner is corrected or restricted according to the amount of shifting of the head part setting temperature for driving the component of the air-conditioner based on the corrected or restricted controlled variable. With this arrangement, an occupant of the automobile senses an enhanced change of the air-conditioning operation when the head part setting temperature is changed.

Abstract: A system for controlling vehicle passenger compartment comfort. An electronic controller receives input from: (i) a thermistor array sensing blower plenum discharge temperature, (ii) a user movable Level Select Control (iii) a potentiometer sensing the position of a servo driven heater core water valve, (iv) an engine rpm tachometer generator and (v) a blower speed signal. The controller drives the servomotor for the water valve at a "High" rate until the valve position potentiometer indicates that the valve is within fifteen degrees (15.degree.) of the target, whereupon the controller drives the servomotor at a "Low" speed.

Abstract: An interior climate control system in which a vehicle fan of the vehicle's own ventilation device, an openable and closable vehicle opening, such as a roof opening or a window opening, and a heater that can be operated independently of the engine are linked by an operating control circuit into a functional unit so that, when a predetermined, upper temperature limit is exceeded, a control circuit allocated to the operating devices for the openable and closable vehicle opening is controlled and activated, and so that, when the temperature falls below a predetermined, lower limit, the engine-independent heater is controlled and started. A pre-air conditioning operation or a preheating operation in the interior climate control system can be achieved by a remote control device and/or by a preadjustable timer device by the operating control circuit.

Abstract: A heating system for vehicles, comprising:a heater (2) generating heat during operation by combustion of fuel;a liquid/air heat exchanger (8) for supplying heat to a vehicle interior space;a liquid circuit passing through the heater (2) and the heat exchanger (8);a blower (10) associated with the heat exchanger (8);an electric switching controller (14) for the blower power, which is connected to the motor (12) of the blower (10) and operates in infinitely variable manner and substantially without losses;a bypass (32) of the heat exchanger (8) which is part of the liquid circuit;an electrically adjustable valve (30) in the liquid circuit for determining the extent of the flow through the heat exchanger (8) and the bypass (32);a vehicle interior space temperature sensor (50); andan electric regulating means (8) connected to said temperature sensor (50) and driving the switching controller (14) and the valve (30).

Abstract: A heater core supplied with hot water by a cooling water recirculating passageway of an internal combustion engine, and having a plurality of parallel tubes arranged between first and second tanks. The heater core forms a first cooling water flow circuit for creating a U-shaped flow whereby the cooling water from the first tank is introduced into the second tank via a group of tubes and then introduced into the first tank via a different group of tubes, and a second cooling water flow circuit for creating a straight flow from the first tank and second tank. A flow switching valve is provided and is usually switched to the first cooling water flow circuit.

Abstract: In a process and apparatus for controlling an interior temperature of a motor vehicle a nominal temperature is set and is used with a sensed interior space temperature to produce a difference value which is fed to a controller (R). The controller produces a controlling value from the difference value which it feeds to an output stage (E) for cyclically and directionally driving a DC motor (M) which adjusts the position of an adjustable member (SG) to influence an amount of heat fed to an interior space (I) of the motor vehicle. A position signal of the adjustable member is measured and fed in a control loop in order to ensure an exact and dependable positioning of the adjustable member, with the positioning signal being formed by measuring and analyzing partial movements of the DC motor through predetermined angles for activations and further rotation of the DC motor.

Abstract: According to a first aspect of the invention, a combustion heater has an ECU for controlling operations of a glow plug, a battery, a fuel pump, and a blower for supplying air to a combustor. The ECU is responsive to an instruction signal instructing starting ignition of the combustor for starting to cause the battery to apply a first predetermined voltage to the glow plug, and at the same time starting to cause both of the fuel pump and the blower to operate for a predetermined time period, and when ignition of the combustor is detected, the ECU starts to cause both of the fuel pump and the blower to operate, and at the same time starts to cause the battery to apply a second predetermined voltage lower than the first predetermined voltage to the glow plug.

Abstract: An arrangement for heating the passenger area of a vehicle. To increase the heating efficiency without requiring the use of more fuel, disposed upstream of the exhaust gas heat exchanger is a catalytic converter that particularly during idling and in a partial load range provides additional thermal energy via secondary combustion of unburned hydrocarbons. To regulate the heat flow that is transferred to the warm water circuit, an exhaust gas diverter is provided that can be controlled by thermal-lug switches in such a way that when heat is required, it can divert the exhaust gas through the exhaust gas heat exchanger or, when too much heat is being supplied from the cooling water and the exhaust gas, the exhaust gas is conveyed directly to the atmosphere via the muffler.

Abstract: A system for heating the passenger compartment of an automotive vehicle has a hot water heater receiving heat from a vehicle engine arranged in series with a self-regulating electrical resistance heater of positive temperature coefficient of resistivity, has a power source for energizing the electrical resistance heater, and has a fan for directing air in heat-transfer relation to the hot water heater and to the electrical resistance heater in sequence to provide a heated air output to the passenger compartment. Fan speed is controlled to regulate the volume of air directed in heat-transfer relation to the heaters so that the electrical resistance heater is promptly and consistently capable of heating that volume of air to at least a selected minimum temperature such as 100.degree. F. as the heated air output is furnished to the passenger compartment, thereby to give a vehicle passenger an immediate and continuing sensation of comfort beginning very promptly after engine start-up even on a very cold day.

Abstract: An air conditioner system for automotive vehicles includes a front air duct for discharging a conditioning air near the occupant of the front seat in a vehicular cabin, and a rear air duct for discharging the conditioning air near the occupant of the back seat in the vehicular cabin. The rear air duct has a vent nozzle for blowing the conditioning air near the passenger's head and a foot nozzle for blowing the conditioning air against the passenger's feet. The air conditioner system includes a door which closes the foot nozzle when temperature of the conditioning air is lower than a predetermined temperature, so as to restrict overly cool air from being discharged from the foot nozzle.

Abstract: In a large vehicle, such as a bus, a fuel-fired coolant heating system. The heating system uses a heating unit to add heat energy to the coolant, which is then circulated to heat exchangers throughout the vehicle. Safety features in the system include an impact switch which immediately stops the flow of fuel to the heating unit in the event of an accident. Another feature which contributes to safe operation of the system is the presence of a deaeration tank in the coolant flow path. The tank allows for the removal of air so that air locks can be prevented and is fitted with a pressure relief valve should overheating occur. Finally, service and inspection of the system is facilitated by attaching components of the system to a slide panel, which can be pulled out of the side of the bus. By making the components of the system easily accessible, problems are generally avoided and safety is, therefore, improved. The heating unit for use with the present invention is one which is available from Espar Products, Inc.

Abstract: An automobile heating system includes a turbocharger driven by the exhaust gas of an internal combustion engine and a shaft of the turbocharger is coupled to a compressor for compressing and heating ambient air to provide a heated air source for supply into the passenger compartment of the vehicle and a source of air for turbocharging the intake manifold of the automobile.

Abstract: An air conditioner system for an automotive vehicle is particularly adapted to insolation dependent correction of a discharge rate of the conditioning air in cold weather, such as in the winter so that an excessive flow rate of relatively cool air will never be discharged in response to insolation.

Abstract: The operation mode of an air conditioner system is automatically controlled between VENT mode, BI-LEVEL mode, HEAT mode and so forth according to environmental conditions. The air conditioner system includes a control unit for operation mode selection. In HEAT mode, the control unit adjusts ratio of the conditioning air discharged from a defroster nozzle to that from a foot nozzle according to environmental conditions or on the basis of a required discharge air temperature necessary to obtain a desired air temperature in the vehicular cabin. The air conditioner system also includes a sensor for monitoring a preselected air conditioner control parameter for producing a sensor signal. The control unit calculates the required discharge air temperature on the basis of the monitored parameter.

Abstract: An unvented gas-fired heater assembly including a base having a gas burner mounted thereon in a combustion area. Gas logs are disposed in the combustion area for heating by the gas burner. A duct assembly is provided which directs heated air from the heater assembly, and the duct assembly is height adjustable to change the height at which air is discharged from the unit. All of the components of the heater are assembled as a unit so that the unit is easily insertable and mountable in an enclosure sure as a fireplace.

Abstract: The present invention relates to a heater unit for the automobile air conditioner. The heater unit comprises a sensor group consisting of a plurality of sensors, mode selecting means for selecting one from at least two D/F modes above-mentioned, and control means for obtaining "target blowout tempeature (Tm)" based on input data from said sensor group and for selecting one out of said two D/F modes in which the rate of air through said foot outlet is greater, in the case where ambient air temperature taken by said sensor group is lower than the specified point corresponding thereto. In virtue of this, it contributed to improving air heating performance with window clouding prevented, in accordance with in- and out-car conditions.

Abstract: A system for controlling vehicle passenger compartment comfort. An electronic controller receives input from: (i) a thermistor array sensing blower plenum discharge temperature, (ii) a user movable Level Select Control (iii) a potentiometer sensing the position of a servo driven heater core water valve, (iv) an engine rpm tachometer generator and (v) a blower speed signal. The controller employs proportional-integral-derivative (PID) strategy in a microprocessor to generate a control signal for operating the heater core valve servo motor to maintain the plenum discharge air at a constant temperature irrespective of wide swings in engine rpm/water pump speed or user selector changes in blower speed.

Abstract: A vehicle heating system with an engine-independent heater (2) and a heat carrier circuit (14). A feed line (24) leads from the internal combustion engine (8) driving the vehicle to the heater (2) and from there to a heating heat exchanger (10). A return line (30) leads from the heating heat exchanger (10) to the internal combustion engine (8), and a control device (6) for the heater (2). The heat carrier circuit (14) has a connection line (36) leading from the return line (30) to the feed line (24) in front of the heater (2), so that a short circuit excluding the internal combustion engine (8) is formed. The switching over from the short circuit to full heat carrier circuit is performed by the control device (6) of the heater (2) and an on-off solenoid valve (38).

Abstract: A blowout temperature control apparatus of an air conditioner for automobiles comprises blowout temperature control means including blowout mode detecting means for detecting one of the outlet ports associated with blowout air temperature detecting means through which delivery of air is being stopped and generating a blowout stop signal, and blowout stop timed control means, responsive to the generation of the blowout stop signal, for controlling an air mixing door associated with the outlet port to temporarily change the amount of heat exchange of the heat exchanger to a reference level (Full Cool) and again change the heat exchange amount to a predetermined constant level complying with individual blowout modes and for maintaining the heat exchange amount at the constant level while the blowout stop signal is valid.

Abstract: An automatic control system for regulating the temperature of blower air discharged over a heater core to a vehicle passenger compartment. A thermistor is disposed to sense discharge air adjacent the heater core and provide a temperature signal. An electrical indication is provided of the condition of a servomotor driven valve controlling water flow to the heater core. An electrical reference signal is provided indicative of a user selected relative change of flow discharge air temperature. A signal is provided indicating inlet pressure to the valve controlling flow of liquid to the heater core. The signals are summed; and, the valve servo driven until the sum is zero modulating the valve to maintain the sum at zero for regulating blower air discharge temperature at a constant level.

Abstract: In a heating apparatus for an automotive vehicle including an evaporator disposed within an engine exhaust pipe; a condenser disposed within a heat core; and a looped heat pipe for feeding medium vapor (e.g. steam) from the evaporator to the condenser and medium liquid (e.g. water) from the condenser to the evaporator, the heating system comprises, in particular, a vapor pressure sensor; a vapor temperature sensor; a controller for detecting abnormal heat cycle condition on the basis of detected vapor pressure and temperature sensors; at least one exhaust gas bypass flapper; and a flapper actuator for actuating the flapper at such a position that exhaust gas is bypassed away from the evaporator in response to a presence of the stop signal from the controller.

Abstract: In space heaters with pressure atomization burners, which have a small combustion chamber volume, good mixing of air with fuel is achieved practically only in the case of relatively high air flow velocities, which leads, however, to difficulties in terms of ignition, especially at high operating voltages and low temperatures. The blower motor is therefore started first when putting the heater into operation, after which it is disconnected from the power source, so that the speed will again decrease, after which the high-voltage ignition and the fuel supply are turned on, so that the ignition can take place at reduced blower speed, and the high-voltage ignition is turned off and the blower motor is restarted after the flame has been recognized in the burner.

Abstract: A temperature control unit has an air distribution setting device, an air volume setting device and a regulating control unit which determined optimum settings for the air distribution setting device and for the air volume setting device. The unit also includes a desired temperature setting device supplying a nominal inside temperature to the regulating control unit. Sensors provide an input indicative of the actual inside temperature to the regulating control unit. Output indicators, preferably in the form of light emitting diodes disposed along selecting paths of the setting devices indicate to the operator the calculated optimum settings for the appropriate setting device to be selected to allow for a controlled, external adjustment of the air distribution setting device and of the air volume setting device.

Abstract: An auxiliary burner provides supplemental thermal energy to a vehicle having a room and domestic water to be heated. The auxiliary burner operates efficiently at a rated thermal output when it is operated for at least the duration of a minimum operational cycle. A reservoir contains heat transfer liquid having a selected thermal energy storage capacity, measured by the amount of thermal energy required to heat the liquid from a minimum to a maximum operating temperature. The heat transfer liquid receives heat from the auxiliary burner. The thermal energy storage capacity is selected so that the auxiliary burner must operate at its rated thermal output for at least the duration of the minimum desired operational cycle to provide the selected thermal energy storage capacity to the reservoir.

Abstract: A heating system for a passenger compartment of a motor vehicle includes a heat exchanger located in the passenger compartment and a feeding conduit extending between the heat exchanger and the cooling circuit of the vehicle internal combustion engine and connected to the cooling circuit at a point downstream of the internal combustion engine in a direction of liquid flow. A return conduit extends between the heat exchanger and a delivery unit of the cooling circuit. The heating system also includes a shut-off device for blocking flow of heat to the heat exchanger. The shut-off device has first and second chambers and inlet and outlet ports communicating with the first chamber. A pressure port communicates with the second chamber and is connected with the feeding conduit. A wall separates the first and second chambers.

Abstract: A heat carrier circulation for a vehicle heating system includes a heater independent of the engine. The heat carrier circulation contains a forward line which leads from the internal combustion vehicle drive engine to a heating system heat exchanger for the vehicle interior and which has a parallel branch in which the heater is disposed; and a return line leading from the heating system heat exchanger back to the internal combustion engine. The heat exchanger circulation contains a connection which goes from the return line to the part of the forward line located ahead of the heater. Installed in the heat carrier circulation is a settable valve which controls the ratio at which heat carrier flows to the heater from the connecting line and from the internal combustion engine.

Abstract: Flame monitoring is normally performed in a space heater for a motor vehicle in order to stop the fuel supply within a certain period of time in the case of interruption of the flame. If interruption of the flame is detected by measuring the temperature on the heat exchanger or the combustion chamber of the heater in order to detect a possibly relatively rapid temperature drop, it must be ensured that the temperature at the test point can indeed decrease rapidly enough. It is therefore necessary constantly to monitor the electric motor of the blower for the combustion air or for the heating air flowing past the heat exchanger, so that the combustion chamber or the heat exchanger will indeed cool after interruption of the flame. The operation of the blower motor is monitored by briefly interrupting the power supply and measuring the generator voltage generated by the motor that continues to rotate. If there is no generator voltage or it is too low, a malfunction indication is generated.

Abstract: An auxiliary burner provides supplemental thermal energy to a vehicle having a room and domestic water to be heated. The auxiliary burner operates efficiently at a rated thermal output when it is operated for at least the duration of a minimum operational cycle. A reservoir contains heat transfer liquid having a selected thermal energy storage capacity, measured by the amount of thermal energy required to heat the liquid from a minimum to a maximum operating temperature. The heat transfer liquid receives heat from the auxiliary burner. The thermal energy storage capacity is selected so that the auxiliary burner must operate at its rated thermal output for at least the duration of the minimum desired operational cycle to provide the selected thermal energy storage capacity to the reservoir.

Abstract: A vehicle heating system (10) utilizes transmission fluid from the vehicle transmission (12) as a source for heat exchange in heater core (26). Fan (28) blows the heated air to heater vents in the normal fashion. When the interior of the vehicle reaches a threshold temperature, thermostat (50) detects the threshold temperature and actuates solenoid (46) which in turn actuates valve (44) so that transmission fluid is diverted from transmission output route (24) to input conduit (30) for heating circulation through heater core (26). The fluid is circulated through output conduit (32), check valve (42), portions of transmission output route (24), and finally radiator (20) where the transmission fluid is cooled for another cycle. The transmission fluid is then returned to transmission (12) via transmission input route (22). In preferred forms, the system (10) provides valve (38), tee connector (34) and caps (36,40).

Abstract: A motor vehicle heating system which is provided in a motor vehicle coolant circuit containing a motor vehicle engine, a motor vehicle heater with a heat exchanger and an associated blower, and a fuel operated heating device that is independent of the motor vehicle engine and is connected upstream from the motor vehicle heater, and a process for operating such a motor vehicle heating system, by which the motor vehicle engine in the motor vehicle coolant circuit is heated first to a temperature which is low yet facilitates its starting, and then the coolant is heated so that the motor vehicle heater can provide heat quickly. Until a first predetermined temperature of the coolant is reached, the coolant, is circulated in the complete motor vehicle coolant circuit.

Abstract: By temperature gradient detection it is determined for the liquid combustion chamber auxiliary heater for motor vehicles, whether e.g. a flame blow-off has taken place, which has to be interpreted as a malfunction and hwich necessitates the discontinuation of fuel supply. Alternatively, it might merely show the switching from a high setting to a low setting. In the latter case a temperature drop to a lower operation temperature occurs also. However, the temperature drop is not as steep as in the case of a flame blow-off. At certain points in time t.sub.1 the target temperature for a point in time t.sub.2 is calculated by the detected temperature according to a certain algorithm having specific device properties as parameters. At this point in time the calculated target temperature is checked for errors.

Abstract: A heating system for automotive vehicles comprises a heater core utilizing engine coolant, a blower disposed upstream of the heater core, and a closed-loop pipe heating system utilizing exhaust heat from exhaust gas. The pipe heating system comprises an evaporator section disposed in an exhaust gas passage, a condenser section disposed downstream of the heater core, a pipe section defining a first fluid passage from the evaporator section to the condenser section, a return pipe section defining a second fluid passage from the condenser section to the evaporator section, working fluid circulating in a fluid passage defined in the evaporator section and condenser section, and in the first and second fluid passages, sensors for monitoring whether activation of the pipe heating system is required, and flow control means disposed in the return pipe section, for controlling working fluid flow from the condenser section to the evaporator section, in response to signals from the sensors.

Abstract: A method for regulating the fuel-air mixture in a fuel burner to maximize combustion and minimizing smoking is disclosed. The method comprising the steps of monitoring temperature variations in the heat produced by the burner; incrementally increasing fuel delivery when a temperature decrease is indicated; detecting air delivery to the burner; incrementally increasing air delivery to the burner when a temperature increase is indicated and air delivery is not at a maximum; and decreasing by less than a full increment fuel delivery to the burner when a temperature increase is indicated and air delivery is at maximum.

Abstract: An automatic control system for regulating the temperature of blower air discharged over a heater core to a vehicle passenger compartment. A thermistor is disposed to sense discharge air adjacent the heater core and provide a temperature signal. An electrical indication is provided of the condition of a servomotor driven valve controlling water flow to the heater core. An electrical reference signal is provided indicative of a user selected relative change of flow discharge air temperature. A signal is provided indicating the speed of the water pump circulating liquid to the heater core. The signals are summed and the valve sums driven until the sum is zero and the valve modulated to maintain the sum at zero for regulating blower air discharge temperature constant.

Abstract: An air conditioning arrangement for a motor vehicle with an internal combustion engine whose fuel air mixture supply system is equipped with a fuel cut off in the coasting operation, utilizes a switching device which, in the case of a high heat requirement, at least temporarily stops the fuel cut off in the coasting operation.

Abstract: A temperature control system for a passenger van having individual temperature selection controls for passengers in the forward and rear sections of the passenger compartment. Separate exothermic heat exchangers for circulation of engine coolant therethrough are provided for the forward and rear passengers. Each heat exchanger is supplied by a coolant control valve and individual blowers provide a stream of forced air over the heat exchangers. A thermistor senses the temperature of the air discharge over each heat exchanger and a controller sums the sensed temperature signal with a user selected relative temperature reference signal provided independently by the forward and/or rear passenger selector inputs and a valve position signal; and, the controller generates a control signal proportional to the summation.

Abstract: In order to supply a heat exchanger of the passenger room heating system with sufficiently heated liquid coolant of the boiling liquid engine cooling system, the coolant inlet conduit of the heat exchanger is connected to a coolant jacket of the engine at a position close to highly heated portions of the engine (such as, the combustion chamber walls, exhaust port walls or the like defined in the cylinder head of the engine).

Abstract: A control system for keeping hot the interior of a heating container on a motor vehicle supplies the heating container with hot air to which heat of a gas produced by burning fuel in a burner has been transferred by a heat exchanger. The control system has a container air temperature sensor for detecting the temperature in the heating container, an ambient air temperature sensor, and a door movement sensor for detecting whether a door of the heating container is opened or closed. When the temperature in the heating container is low and the door of the heating container is opened, the rate of fuel supplied by a fuel pump to the burner and the rate of hot air supplied by a blower to the heating container are controlled depending on the temperature of ambient air.

Abstract: A water type heater, in particular a vehicle auxiliary heater having a temperature safety mechanism, intended to prevent overheating damage to temperature-sensitive parts of the heater, that utilizes a contact sensor that is in heat conducting connection with the heat exchanger. As a heat conducting connection, a direct physical contact between the heat exchanger and a water jacket casing of the heater can be utilized that is, preferably, achieved with the aid of a projection, and optionally, a diametrically opposite projection acting as countersupport. In a modified embodiment, an elastic body that conducts heat well can be placed in a compressed state between the jacket casing and the heat exchanger. The contact sensor then lies against the outer surface of the casing as the temperature safety mechanism. The elastic body that conducts heat well is suitably made in the form of a disk made of a graphite material.

Abstract: A heater device for a motor vehicle detects the temperatures of a burner and a heat exchanger when the heater device is shut off. When the detected temperatures reach respective preset values, a combusting blower for supplying combusting air to the burner and a heating blower for supplying heating air to the heat exchanger are actuated to introduce cooling air to the burner and the heat exchanger for thereby preventing the burner and the heat exchanger from being overheated.

Abstract: A device for heating the passenger compartment and warming up the engine, including a turbo heater having a blower and a turbine driven by the exhaust gas of the engine. The turbo heater is operated as soon as the engine is started. Hot air discharged from the blower is fed into the engine soon after the engine is started, and the hot air discharged from the blower is fed into the passenger compartment. When the temperature of the engine coolant become high, the operation of the turbo heater is stopped.

Abstract: Even if temperature within a vehicle passenger compartment is kept at a constant value, passengers feel uncomfortable in summer for instance, because radiant heat is transferred from the vehicle body to the passenger. To allow the passengers to feel comfortable, the control apparatus comprises radiant heat sensors disposed within the passenger compartment; temperature adjusting devices disposed in the vehicle body, and controller for reducing the amount of heat transferred between the vehicle body and the passengers.

Abstract: A device for controlling fuel combustion in a burner detects the temperature in the burner and controls, based on the detected temperature, electric power supplied to an atmozing glow plug of a fuel atomizer which heats and atomizes fuel.

Abstract: The present invention relates to a heating system for the passenger compartment of a motor vehicle which uses the laden heat of the vehicle engine to heat the passenger compartment when the engine is not running. The invention includes a heat exchanger fluidly connected into engine cooling system, a fan designed to blow air through the heat exchanger and a circulation pump which may be operated responsive to manual or automatic control to circulate coolant through the heat exchanger whereby the fan may blow air through the heat exchanger and then into the passenger compartment to heat the passenger compartment.

Abstract: An air conditioner system includes rear vent and foot nozzles to discharge conditioning air therefrom against occupants of the rear seats in the vehicular cabin. This system also includes a door which selectively opens and closes the rear vent and foot nozzles. This system allows conditioning air to be discharged from the rear vent nozzle when a manually operable switch is on. The conditioning air is discharged from the rear foot nozzle when the switch is OFF while the front discharge mode is set as VENT mode.

Abstract: A system for controlling temperature of air to be discharged into a cabin of a vehicle in an automatically controlled air conditioner system of an automotive vehicle. The air conditioner system is provided with a cooling unit and a heating unit for cooling and heating conditioning air in the air conditioner system for delivery to the cabin of the vehicle. The air conditioner system includes a mechanism for mixing the cooling air and the heating air in a stepwise manner so as to generate a controlled temperature of conditioning air to be discharged into the vehicle cabin with a moderate adjustment in transition so as to maintain a desired vehicle cabin temperature.

Abstract: In the air circulation system for thermostatic chamber, a plurality of circulation ports are provided in the thermostatic chamber near the door and an intake port is formed in the wall of the chamber opposite the door. A plurality of air shutters installed in air ducts are controlled to be opened and closed in response to the opening and closing of the door. Control of various components of the system is performed as follows. When the door is open, hot air is blown out from the circulation ports on one side of the chamber and then drawn into the circulation ports on the other side, thus forming a powerful air curtain at the door portion of the chamber. When the door is closed, the hot air is blown out from the circulation ports on both sides of the chamber into the thermostatic chamber and then drawn into the intake port. In this way the hot air is circulated to keep the interior of the chamber warm.