Abstract: An exhaust control mechanism is provided for use in a model engine system having a source of engine exhaust. The exhaust control mechanism includes first and second tubes and a valve movable in one of the first and second tubes. The first tube includes an upper portion, a lower portion, and a first passage extending through the upper portion and lower portion. The upper portion of the first tube is adapted to couple to a source of engine exhaust. The second tube is coupled to the first tube and the second tube is formed to include a second passage that intersects the first passage formed in the first tube at an intersection region. The valve is movable in one of the first and second tubes to extend into the intersection region.

Abstract: Air pressure which is proportional to the rotation speed of an engine is generated in a crank chamber 2 during operation. The crank chamber 2 is communicated to a fuel tank 10 having sealed structure with interposition of a check valve 25. Air pressure which is proportional to the rotation speed of the engine is applied to fuel in the fuel tank 10. The fuel tank 10 is communicated to the fuel injection system 30. The fuel injection system 30 opens its injection orifice only when power is supplied to a solenoid coil and injects supplied fuel into a combustion chamber. Because air pressure which is proportional to the rotation speed of the engine is applied to fuel, through each fuel injection time is constant, fuel which is proportional to the rotation speed can be injected. In particular, a shorter injection time is sufficient for high rotation speed operation in comparison with conventional fuel injection time, thereby power consumption of the fuel injection system 30 is reduced.

Abstract: Fuel to which a predetermined pressure is applied is supplied to an electronically controlled fuel injection system of a engine for models in order to improve the rotation stability during low speed operation and the response to rapid acceleration or deceleration.The pulsatory air pressure is generated in a crank chamber of a engine for models during operation. An air pressure intake guide 51 of a fuel pressure control valve 1 receives air pressure from the crank chamber. The air intake guide is provided with an excessive pressure leak valve the actuation pressure of which is adjustable. The air pressure intake guide communicates with interposition of a check valve 56 to a controlled air pressure supply passage 54 which communicates to a fuel tank. The check valve 56 supplies the positive pressure of the pulsatory air pressure from the controlled air pressure supply passage to the internal of the fuel tank.

Abstract: In a fuel injector magnetic core is inserted in the solenoid coil in the box. The fuel feeding passage is provided in the magnetic core. The movable valve body which moves up to the magnetic core magnetically is provided in the box. The valve body has a flow passage which communicates to the feeding passage. The valve body is forced to be pressed by the plate spring so as to be in contact with the valve box so as to close the fuel injection orifice. The check valve is provided on the fuel feeding passage. An air pressure of about 20 to 100 kPa generated in the crank chamber of the engine is applied to fuel in the box through the diaphragm. Fuel is introduced into the fuel injector without pressurization and confined by the check valve, and the fuel is pressurized using air which is not affected very much by the force due to acceleration. Fuel is fed stably even under severe operational conditions, the engine will not stall due to insufficient or excessive feeding of fuel.

Abstract: This invention concerns an engine with electric ignition for model cars. A cooling fan is installed in front of the finned cylinder which is supported in a case. The fan is driven by a toothed belt.

Abstract: A method for controlling an engine for a model and a device therefor capable of improving throttle response. Feed of fuel to the engine is increased during acceleration of the engine and decreased during deceleration thereof. This permits a rotational speed of the engine to be smoothly and rapidly varied, to thereby reduce vibration of the engine and prevent knocking and breathing of the engine. Also, adjustment of a trim provided on a side of a controller leads to adjustment of a needle valve, so that the adjustment may be facilitated.

Abstract: The present invention relates to a fueling control device for a remote-control model to prevent fuel oil overflow and to stop fueling automatically by sensing fuel oil delivery pressure. The device has a check valve, a pump and a control device with an electronic control consisting of a DC power supply circuit, a voltage regulation circuit, a switch type voltage regulation circuit, a control key, a CPU, a differential current inspection circuit, a motor circuit, and a motor driven pump. The check valve is connected between the fuel oil tank and an air conduit connected to a muffler. The pump is connected between a fuel oil drum, and a fuel oil delivery tube for pumping fuel oil from the fuel oil drum into the fuel oil tank. When the fuel oil tank is filled, overflow fuel oil causes closure of the check valve to cause a sudden rise of fuel oil delivery pressure. The rising load on the motor is transmitted to the control device to cause the pump to stop running.

Abstract: Exhaust pressure of an air-cooled miniature internal combustion engine is used for fuel metering and fuel delivery to the engine under higher pressure than previously obtainable from muffler back-pressure in the prior art even though the back-pressure in the exhaust system is kept to near zero for maximum engine power and cooling. This is accomplished by tapping on to the engine's exhaust stream right at and facing the exhaust port. As the engine unloads, the muffler's exhaust is further aspirated outward by a faster-moving cooling airstream hence a further reduction muffler's back-pressure causing a decrease in fuel pressurization thus a decrease in fuel flow to the engine in corresponding with a known decrease in fuel requirement at high speed as it unloads, and vice-versa. Special fuel tanks designs for this fuel system are disclosed, as well as additional means for further boosting fuel pressure.

Abstract: The present invention discloses an improved starting mechanism for starting an engine of a model such as a model airplane, a model car, a model helicopter or a model ship, etc. A starting mechanism for starting an engine for a model comprises electric wires as power source connecting part for starting a motor and heating a plug being gathered at one connector, a corresponding connector capable of connecting to said connector being separately mounted, electric wires led from one power source being gathered at the corresponding connector, a hand switch and a plug heating circuit being provided at a suitable position of the electric wires , and the plug heating circuit for heating the plug a little later than the starting time of the starting motor.

Abstract: Disclosed is a model engine starter including a T-shaped starterator having sloping edges on its head coupled to the crank and piston link of a model engine by a spring supported coupling pin, wherein turning the T-shaped starterator by a traction rope through a spiral power spring and flywheel causes the model engine to start working; the turning of the crank by the model engine causes the coupling pin to pass over the sloping edges without causing the T-shaped starterator to rotate.

Abstract: A system for starting model engines. The model engine starting system, in the preferred form, utilizes a motor to drive a torque converting unit. The output of the torque converting unit is mechanically coupled to the crankshaft of an engine through an overrunning clutch so that rotation and torque from the torque converting unit is transmitted to the crankshaft. There is, however, no transmission of rotation or torque in the reverse direction when the engine is running. For glow ignition model engines, a system is described which assists the starting system by controlling the temperature of the glow plug, thus maintaining proper ignition of fuel during starting and running the engine. In order to control the temperature of the glow plug, a control system is utilized to vary the electrical power delivered to the glow plug according to the glow plug's temperature.

Abstract: An improved glow-plug engine for use with a model airplane of the type that includes an output shaft for driving a propeller, a needle valve for controlling a flow of fuel into a carburetor, and a fuel line formed from resilient silicone rubber is provided, wherein the improvement comprises a pinch valve for controlling the flow of fuel through the fuel line which is located farther away from the propeller than the needle valve so that the fuel flow may be adjusted by the fingers of the engine's operator more safely. The pinch valve includes a valve body for securing a section of the resilient fuel line, and a pinching mechanism including a control member that is accurately extendible toward and retractable from a secured section of the fuel line to constrict or expand the fuel flow path defined by the secured section of the fuel line. In one embodiment, control member is a cam mounted on a lever which in turn is linked to a servo-mechanism.

Abstract: A system for remotely starting model toy internal combustion engines, used for propulsion of the model toy, such as an airplane, helicopter, boat, automobile, or other similar vehicles. The starter mechanism being contained in a single case, coupled to a single gear attached to the model engines crankshaft. The starter case being sufficiently small so as to allow it to be mounted directly to the model toys internal combustion engine. An electrical starter motor attached to the starter mechanism case, for cranking the engine, operating from the internal batteries on board the model toy. A remotely controlled servo starting circuit that energizes the engines ignitor plug, allowing sufficient preheat time, and activates the starter motor, from signals provided by the radio receiver on board the model toy vehicle.

Abstract: A low cost multi cylinder radial aircraft engine is composed of an even number of individually functional, single cylinder slider crank model engines. They are mounted to a plate to form equally spaced radially oriented cylinders. In the preferred embodiment, use of standard, low cost, & mass produced two cycles engines are used. This in conjunction with a novel exhaust muffler and throttle mechanism results in a low cost radial engine. The individual engine shafts surround and are parallel to a central output shaft. Pinion gears on each shaft transfer power to a larger sun gear on the output shaft. This gearing synchronizes opposed pistons to reach top dead center at the same time resulting in vibration free piston motion and perfect balance of the entire engine. Said gearing also provides speed reduction for use of large diameter scale propellers. A rear mounted throttle mechanism controls individual carburetor throttles.

Abstract: A low cost multi cylinder radial aircraft engine is composed of an even number of individually functional, single cylinder slider crank model engines. They are mounted to a plate to form equally spaced radially oriented cylinders. In the preferred embodiment, use of standard, low cost, & mass produced two cycles engines are used. This in conjunction with a novel exhaust muffler and throttle mechanism results in a low cost radial engine. The individual engine shafts surround and are parallel to a central output shaft. Pinion gears on each shaft transfer power to a larger sun gear on the output shaft. This gearing synchronizes opposed pistons to reach top dead center at the same time resulting in vibration free piston motion and perfect balance of the entire engine. Said gearing also provides speed reduction for use of large diameter scale propellers. A rear mounted throttle mechanism controls individual carburetor throttles.

Abstract: This invention is a lubrication pumping means contained within one or more reciprocating rods to assure lubrication of the crankpin rod bearing and the wrist pin bearing during operation of a two-cycle internal combustion engine. The invention teaches a means to collect and retain a column of lubricating fluid within a longitudinal bore formed in the rod.

Abstract: This invention is a unique lubrication means contained within a hollow shank of a reciprocating rod including a valve means to maintain a supply of lubricant within the shank of the rod to assure proper lubrication of both the crankpin and wrist pin rod bearings during operation of a two-cycle internal combustion engine.

Abstract: An engine cover is disclosed which replaces the conventional cover generally found on small internal combustion engines. The cover is preferably made of clear Lexan.TM. plastic and is designed to withstand the forces and heat generated by normal engine operation. The cover preferably includes as an integral part thereof a main bearing with heat sinking an auxiliary bearing and an oil fill port.

Abstract: A lightweight crankless piston engine utilizes cam action to produce two piston strokes for one revolution of the engine output shaft, which shaft does not pierce the piston or the combustion chamber. Ease of assembly is enabled. One section of the cam is embodied in the cylinder liner and the opposing cam section is an extension of the output shaft housing. In its simplest mode, the engine is ported for fuel-air induction and exhaust. Cam induced piston rotation directly drives the output shaft while piston reciprocation is allowed without influencing such shaft.

Abstract: Sparkplug means for an internal combustion engine are provided with conduits to introduce pre-combustion gases directly to a mixing area adjacent the sparking electrodes. This may be by connecting the conduits into the plug directly or by connecting them into an adapter to be interposed between the engine and the sparkplug, and providing a pre-combustion chamber therebetween. Preferably there is a mixing area upstream of the electrodes. An electrolyzer can be built into the arrangement to generate the pre-combustion gases immediately adjacent the sparkplug.

Abstract: A system for remote control starting of model engines of the internal combustion type, used on model airplanes, automobiles, boats and the like, while stationary, in motion, or in flight. A starting gear or pulley is mounted by a combination roller bearing and one-way clutch directly on a section of the crank shaft of the engine. An electric starting motor drives the gear or pulley for cranking the engine. The motor is energized by power from a battery pack carried on the vehicle via a circuit having a pair of diodes therein, the voltage drop across which serves to energize the glow plug or igniter. A start switch in the motor circuit is activated by a servo device in turn activated by signals received from a radio receiver on the vehicle.

Abstract: A primer valve for a 2-cycle model engine attached to an accessible portion of the engine to facilitate starting thereof. The valve is provided with direct access to the engine cylinder and with a check valve responsive to the continuous positive internal pressure of the operating engine. A squeeze container is utilized to send a small charge of fuel through the valve into the cylinder.

Abstract: An operative internal combustion engine is transparent for demonstration of internal combustion engine principles. A transparent cylinder houses a noncontacting piston, a combustion chamber being sealed by means such as protruding annular teflon rings seated in an annular groove of the piston or a flexible flap formed integrally with the piston which is pressed firmly to the internal surface of the cylinder wall by pressure developed within the combustion chamber during operation of the engine. Other portions of the engine are transparent to enable their contained parts to be observed during operation. The engine also has an enlarged flywheel to permit operation of the engine at low, observable speeds. The invention burns low carbon fuels such as alcohol to keep the cylinder walls clean and operate without polluting the air.