Abstract: A cooling system for a water cooled engine provides increased heating capacity on cold starts and prevents icing of the throttle body. This is achieved by preheating the cooling water delivered to the throttle body and a heater core with a heating device. The heating device includes a first housing for passing the cooling water from the engine to the throttle body and the heater core, and a second housing disposed around the first housing to form an exhaust passage between the first and second housings. An exhaust gas control device selectively passes exhaust from the engine to the exhaust passage of the heating device to heat the cooling water. The exhaust from the engine is passed to the heating device as a function of when the cooling water temperature.

Abstract: A fuel system having a fuel tank for storing a supply of fuel for an internal combustion engine is provided with a fuel recirculation system. Fuel is supplied from the fuel tank to the engine through a supply line and excess fuel is returned from the engine to the tank through a return line. The fuel in the return line is typically warmed as it passes through or in proximity to the engine. A valve is positioned within the fuel tank to sense the temperature of the fuel supplied to the engine and, when the temperature is colder than desired, divert a portion of the warmed return fuel back to the supply line. The diverted fuel helps warm the fuel supplied to the engine and prevent waxing in the fuel system. When the fuel supplied to the engine is not colder than desired, the valve is closed and the warmed fuel is returned to the fuel tank.

Abstract: An improved internal combustion engine is disclosed. The disclosed engine comprises several preferred embodiments, each including a first piston reciprocating in a first cylinder along a first axis, a second piston reciprocating in a second cylinder along a second axis, said second axis being orthagonal to said first axis, and a flying crankshaft orbiting around a third axis, said third axis being orthagonal to said first and second axis'. Also disclosed are two opposing piston-pairs, reciprocating in cylinders along said first and second axis', each piston in a pair connected to the other piston by a connecting means further defined by a crank aperture within which said flying crankshaft orbits. The disclosed engine further may include at least one ring bearing and/or at least one ring gear within which said crankshaft orbits.

Abstract: In order to reduce the overall dimensions and the weight of a motion transmission system including piston, a tie-rod and a crankshaft, the crankshaft and a single tie-rod are arranged inside two mutually opposite pistons which constitute one single monolithic element reciprocating inside two mutually opposite cylinder. The machine can operate as an endothermic motor with atmospheric feed, as a self-supercharged endothermic motor, as a hydraulic motor, or as a self-driven compressor, or as a compressor which can be driven by an externally applied motor.

Abstract: An internal combustion engine has a rotatable work shaft, a rotatable crank connected with the work shaft, a plurality of cylinders having working chambers, a plurality of pistons movable in the cylinders, and connecting means connecting the pistons with the crank so that a maximum compression pressure in the respective cylinders is transmitted to the crank and a maximum lever arm of the crank is simultaneously obtained, the crank includes at least two crank members located one above the other.

Abstract: A device for enhancing the combustion of fuel in an internal combustion engine including an evaporation chamber adapted to contain a volume of liquid fuel. The evaporation chamber is adapted for communication with an airstream in the internal combustion engine travelling toward a combustion chamber of the internal combustion engine so that fuel vapor formed in the evaporation chamber may pass into the combustion chamber by operation of the internal combustion engine. A fuel agitator mounted for motion in the evaporation chamber agitates the liquid fuel to promote vaporization of the fuel and is driven by an actuator mounted for motion in the airstream.

Abstract: An internal combustion engine has a rotatable work shaft, a crank connected with the work shaft, a plurality of cylinders having working chambers, a plurality of pistons movable in the cylinders, and connecting means connecting the pistons with the crank so that a gas pressure in the combustion chambers applied to the pistons is transmitted when a maximum pressure is obtained in the combustion chambers and a maximum lever arm of the crank is obtained so as to provide a maximum torque on the work shaft.

Abstract: A control thermostat is connected to a liquid cooling system of an internal combustion engine. The control thermostat has an inlet housing part, an outlet housing part, both housing parts being connected each other to form a valve passage therein. A thermo-actuator is provided in the valve passage. A valve member is provided on an actuating rod of the thermo-actuator so as to be operated by the thermo-actuator. The inlet housing part and the outlet housing part are connected to coolant passages of the liquid cooling system so that a part of the coolant in the cooling system flows from the inlet housing part to the outlet housing part by passing through the valve passage.

Abstract: For avoiding exterior, cooling-water-carrying ducts, an internal-combustion engine comprising two mutually opposite cylinder banks has integrated ducts for the feeding and removal of the cooling water to the cooling jackets and the cylinder heads.

Abstract: A system for controlling the temperature of a power fluid comprising a temperature responsive mechanical manifold which automatically bypasses a heating or cooling heat exchange medium from flow into a heat exchange conduit in a reservoir tank and around a power fluid intake conduit. Improved heat rise within the power fluid intake conduit is accomplished by a baffle assembly. The bypassing of heat exchange medium from the heat exchange conduit is controlled by the fuel temperature sensed proximate the outlet end of the power fluid intake conduit.

Abstract: An internal combustion engine with two rows of cylinders with a V-angle of 180 degrees has a crankshaft provided with a flywheel, said crankshaft having a drive for a parallel intermediate shaft adjacent to the flywheel. One camshaft of each row of cylinders is driven respectively from the two ends of this intermediate shaft. The arrangement of the drive for the intermediate shaft near the flywheel avoids the transmission of rotary oscillations from the crankshaft to the intermediate shaft.

Abstract: A two stage internal combustion engine with horizontally opposed cylinders, which engine requires neither a crankshaft nor a camshaft nor a connecting rod nor a piston rod. Chains connected to the pistons turn a wheel mounted for conjoined rotation with a drive shaft.

Abstract: A fluid system of an internal combustion engine has controls and a separate radiator for maintaining the temperature of incoming engine combustion air at optimum conditions.

Abstract: A variable engine valve control system and method of operation thereof wherein each of the reciprocating engine valves is hydraulically or electrically controlled and can vary its lift schedule for various engine operating conditions. During part load operation of the engine, the intake valve is opened and the exhaust valve is closed during the exhaust stroke, prior to a piston's top dead center position, so that the intake port receives exhaust gas, which is then returned to the cylinder during the intake stroke to eliminate the need for an external exhaust gas recirculation system and to improve fuel evaporation into the intake air. Further, during part load, the intake valve is closed before the end of the intake stroke and the intake air is heated by a heat exchanger prior to entry into the cylinder to eliminate the need for air throttling without compromising the compression ratio and ignition characteristics.

Abstract: An electronic fuel injector control is provided for selectively activating fuel injectors for introducing macroscopic liquid fuel droplets into the vacuum chamber of a device for converting fuel into microscopic fuel droplets and fuel vapor. The control has a rotatably mounted rotor shaft, connectable to the rotor in the vacuum chamber and fuel conversion signal device to provide first periodic signal pulses responsive to the angular rotational position of the rotor shaft. Engine sensor electronics is responsive to input signals from engine sensors indicative of engine condition and is further responsive to an output signal pulse from the fuel conversion signal device each time the vane sweeps past the fuel injector. A sensor is provided which is responsive to the desired angular position of the engine crankshaft to provide second periodic signal pulses.

Abstract: A method for controlling a heater of a carburetor and an apparatus therefor. The method includes the steps of: setting a heater pre-heating temperature condition so as for the fuel to be vaporized at the optimum state; setting a heater temperature variation rate properly in accordance with the variation of the intra-room temperature; setting a heater temperature variation rate in relation with the latent heat of the material of the heater; controlling the phase angle of an ac power in accordance with the instructions of a microcomputer; and driving the heater with the variable ac power. Thus a proper vaporizing atmosphere is formed in relation with the variations of the surrounding conditions, thereby contributing to the full combustion of the fuel.

Abstract: A system for providing an air-fuel vapor mixture to an engine for improving completeness of combustion and also reducing emissions. The system includes a vaporizer within which a series of baffles are disposed such that air and fuel pass along a tortuous passageway defined within the vaporizer. Exhaust gases provide heat to the vaporizer, and as air and fuel pass along the passageway of the vaporizer, a homogenous air-fuel vapor mixture is produced, with the homogenous mixture exiting the vaporizer being supplied to the engine by way of an adapter plate assembly. When used with a carburetor, the adapter plate is disposed between the carburetor and the engine.

Abstract: A heating system using a heating device 1 with a positive temperature coefficient thermistor 10 (PTC) is disclosed for the purpose of warming a carburetor/throttle body of an internal combustion engine and a timer device 20 using the PTC 10 for its control.

Abstract: Diesel fuel preheaters with a heat exchanger and electric heating serve, for example, at low temperatures to maintain the flowability of diesel fuel and furthermore to quickly heat diesel fuel to achieve defined conditions for a fuel conserving and emission reduced combustion of the fuel and a better engine performance. The diesel fuel preheaters are provided with an integrated control unit and are adaptable to various engines and operational conditions. A special electric heating element in cooperation with the integrated control unit and the heat exchanger provide a fast and economic preheating of the diesel fuel. Furthermore, various advantageous couplings and mechanisms for the regulation of the heat transfer from the heat-deliverying medium such as cooling water to the diesel fuel at the heat exchanger are shown and described.

Abstract: A fuel dispersion device has been provided in the form of a vacuum pump in which fuel is injected as macroscopic fuel droplets in metered quantities into a vacuum chamber in the pump where it is converted to a converted fuel in the form of a mixture of a smaller percentage of gaseous fuel and a larger percentage of microscopic liquid fuel droplets. This converted fuel is moved from the inlet to an outlet port by sweeping vanes. A combination of vacuum, expanding absorbed gases, mechanical energy and thermal energy is used to create gaseous fuel and microscopic liquid fuel droplets from macroscopic liquid fuel droplets. An air intake passageway is provided at one end of the mixing chamber at substantially right angles to the outlet from the vacuum chamber. An air-fuel discharge passageway is provided on the opposite side of the intake passageway for supplying the mixture of air and converted fuel to the engine for combustion.

Abstract: A fuel preheater for use with internal combustion engines is disclosed. The preheater works on the principle that by preheating the fuel, the fuel is more effectively vaporized, resulting in more efficient combustion. This preheating is accomplished using heat normally wasted via the radiator. The preheater has a housing, through which heated engine coolant on its way from the engine block to the radiator is routed. A coiled steel gas line is routed through the housing, and is connected between the regular fuel line and the engine.

Abstract: A heater valve for a diesel fuel system for a vehicle having a main body portion with a fuel inlet and a fuel outlet adapted to be coupled to the vehicle fuel system. A fuel inlet line and a fuel outlet line from the valve are adapted to be coupled to a heat exchanger. A fuel distribution chamber in the valve is in fluid communication with the fuel inlet and the fuel outlet line and a fuel mixing chamber in the valve is in fluid communication with the fuel inlet line and the fuel outlet. A port opens into the mixing chamber and a spring biased valve in the mixing chamber has a restrictor normally restricting the size of the port opening with a valve shaft extending through an opening in a partition wall into the distribution chamber into engagement with a calibrator.

Abstract: A fuel temperature control system maintains fuel at a programmable temperature by adding heat to or drawing heat from the fuel as it passes through a heat exchanger. A secondary heat exchanger is used in conjunction with Peltier-effect thermoelectric modules to perform the addition of extraction of heat. A control unit receives fuel temperature signals and generates module electrical control signals to control the amount and direction of heat transfer.

Abstract: A fuel circuit is disclosed for air-compressing injection-type internal combustion engines. The fuel circuit is provided with thermostat-controlled fuel preheating and has a switch-over valve controlled as a function of fuel temperature and a heat exchanger as a combined structural unit. The heat exchanger, through which only fuel flows, protrudes into the cooling water flow of the cooling water duct extending in the cylinder head.

Abstract: A spark ignition combustion engine has a cylinder, an air inlet duct, a fuel injector, and a cylinder head having an inlet valve and a passage arranged to form and furnish an air-fuel mixture to the cylinder through the passage and has a heating element including a heat sink in the form of a hollow flat metal box having an integral connecting piece arranged with the connecting piece sealed in an opening in a wall of the duct or passage by a circumferential O-ring so that the flat metal box of the heat sink protrudes into the duct or passage to heat the air-fuel mixture. Two tablets of PTC resistance material are disposed within the flat metal box and are pressed resiliently against respective flat opposite inner sides of the box by a conductive spring disposed between the tablets, and an electrical wire leads from the spring through the connecting piece to connect the tablets to an electrical power source.

Abstract: Several embodiments of gaseous fuel supplying systems for an internal combustion engine used to power a portable generator. In each embodiment, heat is supplied to the fuel so as to maintain the fuel pressure if the fuel pressure falls below a predetermined pressure. In some embodiments, the heat supply is on-off and in other embodiments it is variable. In certain embodiments, the heat is supplied electrically and in another embodiment, the heat is extracted from the engine. In addition, one embodiment incorporates a cold starting arrangement wherein fuel is supplied to the engine for cold starting at full container pressure.

Abstract: An internal combustion engine has a channel member such as a plenum chamber or cylinder head or the like with an inlet receiving air and fuel to form an air-fuel mixture and with a pair of outlets furnishing the air-fuel mixture to respective cylinders or groups of cylinders or to respective cylinder intake valve openings of two-intake engine cylinders or the like. A heating device mounted on the channel member has a heat-exchange surface which intercepts the air and fuel from the inlet to heat and fully vaporize the fuel to form the air-fuel mixture and also to divide the fuel mixture between the two outlets for furnishing the fuel mixture to the individual cylinders, groups of cylinders or intake valve openings.

Abstract: A thermally and electrically conductive housing having a solid tip portion is shown mounting a heating element thermally and electrically coupled to the tip portion which in turn is electrically coupled to a switch mechanism mounted within the housing. The switch mechanism includes a thermostatic snap acting disc adapted to bias a movable electrical contact away from a stationary electrical contact at preselected temperatures. The housing is shown mounted in a carburetor of an automobile to contact energization of a honeycomb heater disposed in the carburetor, however; the device can be used in other locations where it is desired to maintain a body within a selected temperature range.

Abstract: An auxiliary instantaneous heating and magnetization apparatus for the fuel system of a vehicle comprises an instantaneous heating apparatus and a magnetized combustion-aid apparatus. The instantaneous heating apparatus comprising an electric heating device, an automatic isothermal controller, a temperature fuse, a switch, an indicating light, and an electric source connected in series. The electric heating device is mounted to the fuel pipe at a location near the inlet of a carburetor or a fuel injection system. The magnetized combustion-aid apparatus comprises elongated permanent magnets covered by a housing being substantially C-shaped, in section, and is clamped on the fuel pipe at a location near the inlet of the fuel filter or corresponding to the electric heating device.

Abstract: An automatic air intake temperature regulator (10) for regulating the temperature of air entering an engine (12) by varying amounts of ambient air and preheated air entering the engine includes a movable shutter (22). The shutter (22) is movable between a first position wherein the shutter closes an ambient air inlet (20) and opens a preheated air inlet (18), and a second position wherein the shutter (22) closes the preheated air inlet (18) and opens the ambient air inlet (20). The regulator (10) further includes biasing structure (48) for biasing the shutter (22) toward the first position. The regulator further includes temperature responsive structure (50) for sensing temperature of the ambient air and urging the shutter (22) toward the second position as the ambient air temperature increases.

Abstract: A device for heating and cooling fuel to maintain the temperature of fuel delivered to an engine within a desired temperature range includes a body (10) having a fuel inlet (12) and a fuel outlet (14). The body includes a middle portion (16) and a first heat exchanger portion (18) in connection with a heat source. The body also includes a second heat exchanger portion (20) in connection with a heat sink. A thermostatic actuator (86) positioned adjacent the outlet of the device, includes a plunger rod (88) that extends responsive to increased temperature of the fuel passing the actuator. A movable member (74) is positioned by the plunger rod to direct fuel to either a first opening (28) from which the fuel passes through the first heat exchanger portion and is heated, or to a second opening (30) from which the fuel passes through the second heat exchanger portion and is cooled.

Abstract: A vaporizing nozzle which comprises a wall (16) of porous material through which a liquid to be evaporated percolates from one side thereof into a gas stream at the other side thereof and a thermoelectric device (30) located at or adjacent the wall of porous material whereby to regulate the temperature thereof. A computer is provided, with a read only memory (ROM) or equivalent containing a "map" of the air to fuel ratio required for given values of the various parameters and compares the sensed values with the map held in memory and sends an appropriate signal to thermoelectric device controller which responds by sending a current of the correct magnitude and polarity to the device such that the device, which is in close proximity to the wall heats or cools the surface of the wall to a desired level thus regulating the flow or fuel therethrough.

Abstract: A fuel heater for maintaining the temperature of fuel delivered to an engine in a desired range includes a body (12) having a fuel inlet (14) and a fuel outlet (16). A shell and tube assembly (39) in a heat exchanger portion (20) of said body is supplied with hot coolant from the engine, which serves as a heat source. A thermostatic actuator (58) adjacent the fuel outlet extends a plunger rod (76) responsive to increasing temperature. A valve assembly includes a movable cylindrical member (66) and a conical member (72) which includes a number of orifices (74) therethrough. The body includes a conical seat (70) conforming in profile to the conical member. When the fuel is cold it passes from the inlet through an opening (38), and into the shell and tube assembly (39) to be heated. Fluid then flows through a conduit (50), past thermostatic actuator (58) and leaves the body through the outlet.

Abstract: An oil heating and fuel evaporating system for an internal combustion engine is provided that includes an oil heating unit which will heat the oil in the oil pan of the engine to a predetermined temperature before a fuel evaporator unit will heat the fuel in the fuel duct downstream of a carburetor to a predetermined temperature so that the engine can be quickly started during cold weather conditions.

Abstract: The invention relates to a combustion engine with fuel injection system, having at least one cylinder with an air inlet passage, into which passage opens a fuel spray valve which is connected to a fuel pipe with pump. Disposed in the fuel pipe or on the spray valve is a fuel heating element with which the infed fuel can come into direct contact.

Abstract: A vaporizer unit has an enclosing casing including a plurality of tubes therein, defining a fuel passage therethrough, including the tubes. The tubes have coiled wire screen therein. An auxiliary carburetor is positioned at the inlet end of the fuel passage, and an outlet passage leads to the main carburetor of the automobile. The casing also defines an exhaust passage therethrough, transversely of the fuel passage, providing heat transfer between the exhaust gases and the tubes. The temperature of the resulting vaporized fuel is sensed for varying the flow of the exhaust gases and thereby controlling the temperature of the vaporized fuel, which is maintained at 250.degree. F. to 260.degree. F. An electric crystal is used for breaking down the heavy ends of the fuel. The rate of flow of air to the main carburetor is varied for correspondingly varying the rate of intake of vaporized fuel from the vaporizer unit.

Abstract: A fuel heating device for an automatic engine including a heat exchanger heating the gasoline from the supply tank before directing the gasoline into the carburetor and utilizing heat from the engine coolant system, the vapor pressure of the heated gasoline being monitored for regulating the flow of engine coolant.

Abstract: A carburetion system for an internal combustion engine includes a fuel heater and vaporizer unit which produces a 30% liquid/70% vapor fuel mixture for delivery to the carburetor, and a flow control valve connected to be responsive to the ported vacuum pressure in the carburetor to increase the flow of heated and vaporized fuel to the carburetor when the ported pressure decreases, and decrease the flow of such heated and vaporized fuel when the ported pressure increases. The air drawn into the carburetor as a result of engine operation is further heated to a temperature within the range 160.degree. F. to 180.degree. F., by thermister controlled heating elements. In operation, the flow control valve works in conjunction with the carburetor float chamber to provide varying amounts of heated liquid fuel and heated vaporized fuel for mixing within the carburetor with the heated air, to enhance combustion within the engine and produce a corresponding reduction in exhaust pollutants.

Abstract: A compact fuel conditioner assembly which performs fuel heating and pressure regulation functions in a circuit between a tank and a fuel injector. The assembly's body has two parallel bores arranged side by side. An electrically powered heater is disposed in one bore to heat fuel passing to the injector. The second bore is divided by a transverse wall which has a central hole. A thermal motor actuator is disposed in this second bore on one side of the transverse wall, and a spring-biased valve is disposed in the same bore on the opposite side of the transverse wall. The thermal motor actuator operates the spring-biased valve via a tubular element which passes through the hole in the transverse wall, and controls the recirculation of excess fuel returning from the injector.

Abstract: An air conditioner system for automotive vehicles has an evaporator disposed in a duct and selectively operative to cool air flowing through the duct, and a combustion heater disposed outside the duct and held in air flow communication with the latter for heating air drawn into the duct. The air conditioner system thus constructed can be applied to a vehicle having a non-water-cooled engine and is effective to cause a sudden increase in the temperature of air to be supplied to the vehicle passenger compartment.

Abstract: A carburetion system for an internal combustion engine includes a fuel heater and vaporizer unit which produces a 30% liquid/70% vapor fuel mixture for delivery to the carburetor, and a flow control valve connected to be responsive to the ported vacuum pressure in the carburetor to increase the flow of heated and vaporized fuel to the carburetor when the ported pressure decreases, and decrease the flow of such heated and vaporized fuel when the ported pressure increases. The air drawn into the carburetor as a result of engine operation is further heated to a temperature within the range 160.degree. F. to 180.degree. F., by thermister controlled heating elements. In operation, the flow control valve works in conjunction with the carburetor float chamber to provide varying amounts of heated liquid fuel and heated vaporized fuel for mixing within the carburetor with the heated air, to enhance combustion within the engine and produce a corresponding reduction in exhaust pollutants.

Abstract: An internal combustion engine having three valves per cylinder includes a novel fuel injector that produces a heated 30% liquid/70% vapor fuel mixture at the injector's outlet. This heated fuel mixture combines with air heated to a temperature within the range of 160.degree. F. to 180.degree. F. by thermistor controlled heating elements prior to entering a combustion chamber. To help reduce pollutants and increase efficiency of the engine, a methanol/water vapor mixture is further drawn through a PCV line and combined with the air/fuel mixture prior to entering into the combustion chamber.

Abstract: A suction gas heater control device for an engine comprising first detector for detecting when the engine is brought into complete firing, and for providing a signal in response thereto; a first timer coupled to the output of the first detector for continuously providing a first operating signal for a predetermined period of time after a first period of time, the first period of time starting with the beginning of the inputting of a signal from the first detector and ending with the stopping of the signal from the first detector; a second detector for detecting engine temperature and for providing a second operating signal when the engine temperature is lower than a predetermined level; and a judgement circuit means coupled to the first timer and the second detector for providing a signal for operating a suction gas heater, when the first operating signal is applied thereto and when the second operating signal which indicates that at least one of the temperature of the engine is lower than a predetermined lev

Abstract: An electronic device controlling the intake manifold heater and priming fluid injection system in diesel engines. The device automatically energizes the intake manifold heater and enables the priming fluid injector in response to electrical signals received from a coolant temperature sensor and a lubricating oil pressure sensor so as to improve cold starting, cold driveability, fuel consumption, gas emissions, and to eliminate white smoke at the exhaust. The device prevents the priming fluid injector from being operated until after the intake manifold heater has cooled to a level preventing ignition of the priming fluid, such as ether, in the intake manifold.

Abstract: The invention relates to a valve for apportioning preheated and non-preheated air to an internal combustion engine. The valve has a pivotally mounted valve flap, which is rigidly joined to a balance flap which is so constructed and arranged in the valve body that the low pressure created by the airflow through the valve body gives rise to oppositely directed torques of substantially the same magnitude about the pivot shaft on the balance flap and the valve flap.

Abstract: A device preheats a fuel mixture in an intake manifold of a combustion engine, the device corresponding a cylindrical body having a side wall and a bottom disposed in the wall of the intake manifold. The body is arranged on an electro- and heat insulating contact bearer and is secured on the intake manifold in an electro- and heat conducting way, the bottom of the body being provided with PTC pills which are connected to a current conductor and are secured on the bottom in an electro- and heat conducting way. The bottom has such a thickness and shape that during preheating the fuel mixture a homogeneous heat conduction is created, the side wall of the body having securing means to secure the preheater, and wherein it has such a thickness that together with the securing means it provides the required heat resistance upon heat transfer from and to the intake manifold.

Abstract: A heat exchanger system for internal combustion engines, both spark (gas) and or self-ignition (diesel) and liquid or air-cooled engines in which a duct or enclosure, fabricated entirely of non-heat conducting materials, which completely surrounds the rear of existing heat exchanger, cooling coil, or cooling fins, removes excessive heat by ducted air being routed through disposable air-filter, then into the velocity accelerator section, from there into the plenum or accumulater section to be consumed by the engine. The improvement being that no excessive heat is allowed to accumulate or be discharged into the engine compartment, fan and pulley arrangement are eliminated, reducing noise and excessive power loss, filtered air is accelerated to super-sonic velocities to better atomize fuel, allowing for greater volumetric efficiency of cylinders, all work being performed by the pressure differentials produced within the engines cylinders during its intake cycles or strokes.

Abstract: An intake air temperature control device for mixture-compressing internal combustion engines having an inlet flapper proportioning the flows of cold and preheated raw air into a duct junction and into raw air mixing duct, the flapper-adjusting wax thermostat being arranged inside a thermostat chamber into which branch flows of cold and preheated raw air are admitted through two calibrated branch inlets. A narrow annular gap through which the combined branch flows must pass assures an integrated response of the thermostat to changing temperatures and air intake speeds. A lost-motion drive connection and a biasing member produce a full-load correction of the adjusted temperature. The flapper drive members may have valve edges which cooperate with the calibrated branch inlets to open and close the latter.

Abstract: In an engine system wherein the engine coolant is permitted to boil and the gaseous coolant used as a vehicle for removing heat from the engine, a heating jacket associated with the induction conduit of the engine is supplied with gaseous coolant via a control valve during cold engine starts and during modes of engine operation wherein it is advantageous from the view point of fuel economy to raise the temperature of the engine and/or the incoming fuel charge. The supply is terminated under other modes of operation to avoid heating the incoming charge and reducing charging efficiency.

Abstract: An air temperature control system for an engine including an intake manifold, an air mixing housing in communication with said intake manifold; the system includes a control unit means, responsive to at least one engine operating parameter and to the temperature of the air delivered to the intake manifold for generating an actuator control signal in accordance with a stored programmed temperature profile; actuator means responsive to the actuator control signal and mechanically linked to the movable air mixing valve for adjusting the air mixing valve in proportion to the actuator control signal; and means for sensing the temperature of the mixed air delivered to the intake manifold.