Abstract: An internal combustion engine comprises a combustion chamber and a piston movable relative to the combustion chamber between top dead center and bottom dead center positions. A fuel transfer passage introduces fuel-air mixture into the combustion chamber in response to piston movement. An auxiliary chamber is also provided which is communicable with the combustion chamber in response to piston movement shortly after the ignition of a fuel-air mixture, such that high pressure ignition gases enter the auxiliary chamber. The high pressure ignition gases thereafter flow back into the combustion chamber in response to piston movement before communication is established between the combustion chamber and the fuel transfer passage. The incoming flow of high pressure ignition gases serves to influence the normal scavenging streams.

Abstract: Apparatus for limiting the amount of torque to a driven shaft having a tool for applying power to a workpiece is continuously adjustable throughout a predetermined range. A housing defines a cylindrical chamber open at one end having an adjustable plate disposed therein. First and second shafts enter the housing through opposite ends and have first and second disks attached thereto within the housing. Disks are frictionally coupled by a force generated by a spring disposed about the first shaft between the adjustable plate and the first disk. When the preselected limit of torque is exceeded the disks slip with respect to one another thus, limiting the amount of torque delivered by the apparatus. Adjustment of the plate selectively increases or decreases the compression of the spring and thus, alters the maximal amount of torque that can be delivered. An alternative embodiment is disclosed for incorporating the apparatus within the housing of a power tool such as a drill motor.

Abstract: A method and apparatus for efficiently atomizing fuel for supplemental supply to an internal combustion engine are described wherein the atomized fuel is supplied to the engine in addition to the conventionally carburetted fuel. A portion of the fuel being supplied to a carburetor in a conventional manner is diverted to the system according to the invention and is supplied thereto in a metered fashion. A fuel vapor is produced and is supplied to the engine downstream of the carburetor, as required by the engine; this requirement being indicated by engine vacuum. Vaporization is accomplished in the described embodiment by heat and ultrasonic nebulization.

Abstract: In a two cycle internal combustion engine having a cylinder, a piston, and an exhaust port, the improvement comprising tapering the edge of the exhaust port farthest into the cylinder where it intersects the cylinder wall as an isosceles triangle.

Abstract: An exhaust gas recirculation control system employs a flow rate valve in the recirculation line. The valve is operated by suction pressure obtained from two suction ports in the engine intake passage. Suction lines from those ports contain air inlet valves which dilute the suction pressure with atmospheric air, depending upon engine operating conditions. A fuel supply increasing valve is connected to a venturi in the engine intake passage and suction operated control means control operation of that valve. The result is an improved acceleration characteristic for the engine under load without substantial increase in discharge of pollutants into the atmosphere.

Abstract: Apparatus for controlling exhaust gas recirculation in an internal combustion engine employs a first control valve in an exhaust gas recirculation passageway, a second control valve in an air conduit connecting the intake passage to atmosphere through selective restriction means, and a regulating valve responsive to differential vacuum intensities for actuating the control valves. The restriction means comprise a plurality of individual restrictions one or more of which are selectively put into operation depending upon engine operating parameters such as coolant temperature and driving speed.

Abstract: A temperature responsive, pressure operated diaphragm valve assembly for use in association with an automobile internal combustion engine comprises a valve housing having a working chamber on one side of a diaphragm member, a biasing spring used to urge the diaphragm member in one direction with a valving element held in position to close a fluid passage, one end of the fluid passage being communicated to the fuel intake system of the engine and the other end thereof communicated to a source of fluid medium, and a temperature sensor having a parameter, the magnitude of which is variable according to the magnitude of the ambient temperature. The temperature sensor also has a push rod axially movable in response to change in magnitude of the parameter, the movement of the push rod being in turn transmitted to the biasing spring to adjust the biasing force exerted thereby on the diaphragm member.

Abstract: The engine has a compressor which compresses air for delivery via a heat exchanger to an expander. The expander receives the compressed air and fuel and, while combustion occurs during a power stroke, the air pressure is reduced to atmosphere and the expander drives a crankshaft. The fuel is injected at a rate to maintain the air temperature at the entry temperature. The exhaust passes through the heat exchanger to heat the incoming flow of compressed air to the expander. Energy may be stored via the crankshaft or used directly.

Abstract: A two-cycle engine (10) has an idle fuel system which admits fuel-air mixture into the transfer passages (22). Heated air is supplied to the idle mixing passage (42) by a serpentine air passage (45), while fuel from the carburetor float bowl (33) is supplied through a needle valve (50). A reed valve (43) admits the idle mixture to the transfer passage (22).

Abstract: An apparatus is described for controlling recirculated exhaust gas quantities in self-igniting internal combustion engines which have a fuel injection pump. Two parameters, the rpm (preferably via the rpm-dependent suction chamber pressure) and the position of the quantity-adjusting device, are obtained from the fuel injection pump and delivered to a performance-graph memory in which a control value for the recirculated exhaust gas quantity is stored in accordance with these parameters. A recirculated exhaust gas quantity control device is actuated in accordance with the recalled control value.

Abstract: An apparatus is proposed for controlling the exhaust recirculation rate in an internal combustion engine, in particular an engine with auto-ignition, which includes preferably one mixture valve in the area of the discharge opening of the exhaust recirculation line and which is characterized in that the control is accomplished via the mixture valve position ahead of the inlet valves in accordance with the concentration of at least one component of the air-exhaust gas mixture and/or at least one component of the exhaust gas. Thus it is possible to operate the engine with a relatively emission-free exhaust. An exhaust gas reservoir is further provided, with which peaks in the exhaust gas concentration due to a dynamic driving mode can be intercepted. Finally, it is also proposed that the exhaust recirculation be realized solely via a pressure, which can be controlled in open-loop or closed-loop fashion, in the exhaust line by means of a valve.

Abstract: A water-cooled two stroke engine including a cylinder formed with an exhaust port which is adapted to be cyclically closed by a piston reciprocating in the cylinder. The exhaust port is provided at the upper portion with a port timing control valve which is operated to control the port timing in accordance with the engine speed by a piston-cylinder type actuator. The actuator is adaped to be operated by the engine cooling water pressure and has an operating pressure chamber at one side of the piston and a compensating pressure chamber at the other side. The cooling water supply passage has a flow restriction and the pressure upstream of the restriction is introduced into the operating pressure chamber and that downstream of the restriction into the compensating pressure chamber.

Abstract: An I.C. engine has a block, the engine forming a bore and having a crankshaft. The engine includes:(a) first and second pistons that reciprocate in that bore,(b) connection structure interconnecting the pistons, the pistons operatively connected to the crankshaft,(c) valve casing structure operatively coupled to the block, there being a first zone in the bore between the casing structure and one piston, and a second zone between the casing structure and the other piston,(d) the valves associating with the casing structure adapted to pass intake air into one of such zones and to exhaust compressed air out of the other of the zones in response to piston movement in one direction, and adapted to pass intake air into the other of the zones and to exhaust compressed air from that one zone in response to piston movement in the opposite direction.

Abstract: A system for blending and mixing a supplemental unconventional fuel or fuels with the regular fuel or fuels utilized by a fuel consuming device, such as an internal combustion engine, furnace or other device that uses conventional petroleum fuels which enables the owner or user of the fuel consuming device to utilize supplemental fuels. The system enables the owner or user of the fuel consuming device to control or adjust the quantity of supplemental fuel that is added to the fuel system of the device and enables the owner or user to operate the device selectively with or without using the supplemental fuel mixture. In order to enable the device that is consuming the supplemental fuel or fuels, blend of supplemental fuel or fuels and regular fuel or fuels or regular fuel or fuels there is a mechanism forming part of this invention to regulate the temperature to keep the temperature of the fuels consuming device within the desired operating range for the fuels consuming device.

Abstract: A cylinder for crankchamber precompression type two stroke engines includes three pairs of main scavenging ports which are symmetrical with respect to a longitudinal plane passing through the centers of the intake and exhaust ports and containing the longitudinal center line of the cylinder. A pair of auxiliary scavenging ports are provided at the opposite sides of the longitudinal plane in such a manner that in a horizontal cross-section the flows from the auxiliary ports do not intersect with the flows from the main ports. Further, the auxiliary scavenging ports are directed further upwardly than the main ports.

Abstract: An internal combustion engine equipped with a blowby gas recirculation system is provided with a jackshaft which is driven by a crankshaft and rotatably supported in a crankcase to operate engine accessories. A rotational part of a centrifugal oil separator is securely connected to an end of the jackshaft to be rotatable with the jackshaft, thereby effectively separating engine oil mist from blowby gas which is sucked through the oil separator to an intake manifold.

Abstract: In a diesel engine which includes an air intake system, an exhaust system, and an exhaust gas recirculation passage which recirculates part of the exhaust gases produced by the engine from the exhaust system to the air intake system, a control system for the recirculation of exhaust gases and the flow of intake air, having an intake air flow control valve mounted in the air intake passage, and a recirculated exhaust gas flow control valve, mounted in the exhaust gas recirculation passage, these two control valves being so coupled together that, as one of them opens progressively, the other closes progressively, and vice versa, so that exhaust gas recirculation ratio alters in substantially direct proportion to the amount of opening of the exhaust gas recirculation flow control valve.

Abstract: A cross-flow type internal combustion engine having an exhaust gas recirculating passage formed in the cylinder head. The passage is located adjacent to cooling water jackets so that the gas in the passage is cooled by the water in the jackets. The passage is formed with an expansion chamber which is also located adjacent to the cooling water jackets and the intake ports. Due to the cooling effect in the passage, water content in the recirculated gas is condensed and separated from the gas. Further, the gas flow speed is decreased in the expansion chamber so that carbon particles in the recirculated gas can be separated therefrom.

Abstract: A device for regulating a diesel motor driven feed pump which includes an injection pump associated with the diesel motor to control its operating speed, comprises a load, a variable pressure resistance connected by a feed line in series in series to the feed pump and a sump for the feed pump connected to the pressure resistance. In addition a control circuit is connected to the feed line and it includes a pressure scale portion and a limiting device portion each of which includes a respective pressure scale cylinder and limiting device cylinder portion for their respective coaxially arranged pressure scale piston and limiting piston slidable therein. A differential manometer is connected between the pressure scale portion and the limiting portion and it is admitted with the flow medium of respective differential pressures of the associated cylinders of these portions.

Abstract: A governor sleeve is axially displaceable on a stationary governor shaft and has an inner space which is adjoined by the governor shaft and communicated with the inner chamber of a pump housing charged with fuel. The inner space varies in volume drawing thereinto and discharging therefrom fuel in response to axial displacement of the governor sleeve. There is provided valve and channel means which establishes restricted communication between the inner space and the inner chamber upon displacement of the governor sleeve in the direction to produce contraction of the inner space and substantially unrestricted communication between same upon displacement of the governor sleeve in the opposite direction to produce expansion of the inner chamber in order to prevent an acceleration jerk and smoky exhaust.