Abstract: In an internal combustion engine intended to provide high fuel economy, low noxious emissions and high power, a pair of four cycle power cylinders are alternately fed by a two cycle charge cylinder in which a rich air/fuel mixture is compressed and delivered alternately to variable volume charge chambers communicating with the power cylinders, the three cylinders operating off a common crankshaft. A lean air/fuel mixture is inducted to each power cylinder on its intake stroke. Ignition occurs in the charge chamber and the flame front moves therefrom into the lean mixture in the power cylinder. The volume of the charge chamber may be varied in response to power requirements of the engine. A valve between the charge cylinder and charge chamber blocks flow therebetween during ignition and provides a restricted orifice between the charge chamber and power cylinder during the compression stroke controlling flow therebetween.

Abstract: An engine system includes a starting aid which is mounted in the air inlet manifold of the engine and is supplied with fuel from a fuel chamber to assist starting of the engine. The engine includes a fuel injection nozzle which is supplied with fuel at high pressure by means of a pump. The leakage fuel from the nozzle is utilized to recharge the chamber with fuel during running of the engine and the chamber is provided with an overflow connection back to a source of fuel.

Abstract: For starting a compression-ignition internal combustion engine, a solenoid valve is electrically energized simultaneously with the starter motor (the valve remaining electrically energized while the engine afterwards continues to run) to supply oil pressure from the engine oil pump to a first piston-in-cylinder device to move a fuel injection pump lever from "stop" to "run" against a first return spring, so that fuel supply always (even when starting) depends upon adequate oil pressure. A second piston-in-cylinder device with a second return spring is responsive after a delay to the oil pressure to change the engine from at least partial decompression to full compression.

Abstract: An installation for the metered lubrication of an injection pump flangedly connected to an internal combustion engine, in which the cam shaft is driven by an intermediate gear shaft non-rotatably connected therewith, which is rotatably supported in the crankcase of the internal combustion engine on two slide bearings and which is lubricated from a connection with a lubricating oil channel of the internal combustion engine; at least one of the slide bearings of the intermediate gear shaft is constructed in conjunction with the same as metering device; the metered lubricating oil, after leaving the slide bearing, is supplied by way of a sealed space formed at the connecting place between the cam shaft and the intermediate gear shaft, to a central bore through the cam shaft of the injection pump, from where the lubricating oil reaches the injection pump through a radial bore.

Abstract: In a fuel injection system, the combination of an air measuring valve, biasing structure and an air suction tube of an internal combustion engine. The suction tube defines an air flow cross section and the air measuring valve provides a controlled flow of air through the flow cross section, with the air measuring valve being mounted eccentrically within the suction tube against a force produced by the biasing structure to effect the noted control. Both the air measuring valve and the suction tube have cooperating surfaces which effect a closing of the flow cross section by the biasing structure when no air is flowing; and during air flow a gradual opening at one end of the air measuring valve by an impedance induced force as a function of the pressure difference prevailing on both sides of the air measuring valve and a further opening at the other end of air measuring valve as the air flow increases through the opening at the first mentioned end.

Abstract: A multicylinder two-stroke internal combustion engine has a plurality of reciprocating pistons arranged in a circle about a central cavity in which is located a rotary distributor driven in timed sequence with operation of the pistons. The rotary distributor includes internal cavities which may connect through ports in its outer cylindrical surface with the working cylinders to control the flow of intake air, scavenging air and/or fuel to the working cylinders. Scavenging air can be precompressed either in a preceding cylinder, taken in ignition order, or in the crank chambers beneath the pistons.

Abstract: The two heating surfaces of the exchanger are both provided within a jacket. The first heating surface is formed, in part, by blind tubes which project into the casing through which the primary gas flows. The second heating surface is disposed in the space between the feed pipe and the jacket and receives the flow of primary gas after the primary gas has passed over the blind tubes. The secondary gas passes into the interior of the blind tubes while a working medium flows through the second heat exchanger in heat exchange relation with the primary gas. Some of the returning cooled primary gas can be tapped off and supplied as a coolant through the tube plate in which the blind tubes are mounted.

Abstract: A control system is adapted for an internal combustion engine in which a jet of air is injected into each combustion chamber via a second intake valve during each exhaust cycle and the subsequent intake cycle. The system comprises a source of compressed air having a pressure to be varied in accordance with the engine speed, an injection passageway leading from the source toward each second intake valve and a flow controller operated in accordance with changes in intake manifold vacuum. The flow controller includes a scheduled flow area therethrough to increase, under conditions in which the engine speed is constant, the amount of air passing through the injection passageway in accordance with increasing engine load in such a way as to increase the ratio of air flow through the injection passageway to the intake air flow to the engine under light engine load in order to cope with increasing residual gas fraction within each combustion chamber when the engine idles or operates under deceleration of the vehicle.

Abstract: Disclosed is a multi-cylinder engine having auxiliary valves, in addition to intake and exhaust valves. Each of the cylinders is connected to a common accumulation chamber via corresponding branches. Each of the auxiliary valves is arranged in its respective branch and opens over almost the entire period of the compression stroke and at the beginning of the exhaust stroke of the corresponding cylinder.

Abstract: An air-fuel ratio controlling system for a fuel-injection type internal combustion engine has an air valve disposed in an air intake duct upstream of a throttle valve and a fuel-metering variable orifice disposed in a fuel circuit. The air valve and the fuel-metering variable orifice are operatively associated with each other and controlled normally to maintain the air-fuel ratio at a substantially constant value. Pressurized fuel is used as a working fluid to operate the air valve. O.sub.2 sensor detects the oxygen content of exhaust gases to actuate a valve which varies the pressure of the working fluid to change the degree of opening of the air valve whereby the air-fuel ratio is adjusted in accordance with the output of the O.sub.2 sensor.

Abstract: An improvement in internal combustion engines of the type having an air supply line for supplying air to a combustion chamber and an auxiliary air valve containing a valve member connected to and movable with a membrane which is displaceable under action of the suction pressure in the air supply line includes, in a further embodiment, a valve line interconnecting the air supply line and one side of the membrane, a condition-responsive valve located in the valve line which is shiftable from a first position communicating one side of the membrane of the auxiliary air valve with the atmosphere and a second position communicating the one side of the membrane with the air supply line, and wherein the condition-responsive valve is shifted between the first and second positions for opening the auxiliary air valve during starting of the engine and for closing the auxiliary air valve during the warm operating phase of the engine.

Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine includes an adjustable throttle movable against the action of resilient means by means responsive to the speed of operation of the associated engine to which fuel is being supplied. Movement of the throttle against the action of the resilient means reduces the rate of fuel supplied to the engine and temperature responsive means is provided to adjust the throttle to increase the rate of fuel supplied to the engine when the engine is cold.

Abstract: A combined engine starting and ventilating control system includes a source of electrical power and a circuit interconnecting the source of power to the ventilating blower motor and the starter motor and ignition system with an interlock timing device preventing connection of the power source to the starting motor and ignition system until the ventilating motor has been in operation a predetermined period of time.

Abstract: Control system is adapted for an internal combustion engine in which a jet of air is injected into a combustion chamber via a second intake valve during a period overlapping an exhaust cycle and the subsequent intake cycle for expelling residual gas within the combustion chamber in order to reduce residual gas fraction of charge for the subsequent combustion within the combustion chamber. The system comprises a source of compressed air having a constant pressure, an injection passageway leading from the source toward the second intake valve, a flow control valve fluidly disposed in the injection passageway, and means whereby the flow control valve will vary effective flow area of the injection passageway in response to a signal indicative of the flow rate of fluid passing through the engine induction passageway.

Abstract: In an engine of the type having opposite side wall portions more or less differing from each other in rigidity, as in a so-called side valve engine, the axis of the piston unit is set at such an angle of inclination relative to the axis of the associated cylinder bore that the two axes substantially coincide with each other in the power or explosion stroke of the engine cycle when the cylinder block is tilted, under the tensile load acting on the engine structure, on account of the differential rigidity of the opposite side walls thereof. With this axis arrangement, an uneven wear of the mating bearing surfaces of the piston and cylinder and of the crankpin and bore in the large end of the associated connected rod is effectively prevented.

Abstract: A heat exchange attachment is wound around a flue pipe for heat transfer from the pipe to the surrounding atmosphere. The attachment includes a pliable elongated band of conductive material having a longitudinally elongated inverted channel-like projecting portion, a longitudinally elongated strip-like contacting portion adjoining the projecting portion therealong on either side thereof, and a longitudinal series of spaced apart transverse cuts dividing the projecting portion into a longitudinal series of individual projecting members. The contacting portions are disposed substantially in surface contact with the outer surface of the pipe, and the members project outwardly into the atmosphere surrounding the pipe with the adjacent edges of successive members spaced apart for air flow between and within the members. The attachment may be mounted on a flue pipe by screw fastening means.

Abstract: A decompression device for internal combustion engines to enable easier starting, comprising a camshaft operated balancer acting on a valve of the engine, a rotatable decompression cam acting on the balancer, and a rotation device to rotate the decompression cam during starting, the balancer and the rotation device being designed to enable minimum space requirement and symmetrical motion of and forces on the decompression mechanism.

Abstract: The thermal induction unit utilizes heat rays radiated by external material bodies by virtue of their absolute temperature and by reflection. The majority of the surface area of the thermal induction unit is fabricated of heat insulation material so as to inhibit heat transfer therethrough and passages are provided throughout the otherwise insulated area. The structure on the induction side of the unit is so conformed as to reflect, direct and converge radiant heat rays through the passages and thus into the environment on the opposite side of the induction unit.

Abstract: A fuel injection system for a compression ignition (Diesel) internal combustion engine, having a fuel injection pump and devices, associated therewith, for increasing the idling speed and advancing the injection timing during cold starting. The idling speed increasing device is coupled to the injection timing advancing device such that both may be operated simultaneously.

Abstract: A fuel injection system for an internal combustion engine has two sets of fuel injectors mounted on the engine so that each engine cylinder is provided with two injectors. A fuel metering and distributing device meters a fuel under pressure from a fuel source and distributes the metered fuel to respective injectors. The fuel metering and distributing device includes a housing provided with a fuel inlet connected to the fuel source and two sets of fuel outlet ports each connected to one of the fuel injectors. A rotor is mounted in the housing for rotation in timed relationship to the engine operation and is provided with an axial fuel passage always in communication with the fuel inlet. Two orifices are formed in the peripheral wall of the rotor in communication with the fuel passage while two sets of apertures each communicated with one of the fuel outlet ports are formed either in the housing or in a control shaft disposed in the housing in telescopic relationship to the rotor.