Showing papers on "Four-stroke engine published in 1973"

Split piston two-stroke four cycle internal combustion engine

Abstract: A two-stroke, four-cycle internal combustion engine is provided with a split piston which reciprocates within a cylinder having primary and secondary pre-combustion chambers. The lower portion of the piston is split by means of a partition which divides the cylinder into opposed air and combustible charge pumping chambers. One-way flow valves are provided to control the flow of air and a combustible charge into respective pumping chambers as the piston moves along its compression stroke. Movement of the piston along its power stroke compresses volumes of air and the charge within the pumping chambers, with these volumes then being directed through ports formed in a piston skirt and the cylinder wall into the pre-combustion chambers through one-way flow valves. Exhaust gases are scavenged through exhaust ports in the cylinder wall which are exposed as the piston completes its power stroke, with scavenging being assisted by injection of air directed from the pumping chamber through a one-way flow valve in a mid-portion of the cylinder wall. Certain of the one-way flow valves are threadably mounted for axial adjusting movement to vary valve lift and to facilitate valve replacement. The partition is formed integral with the piston and slidably projects through the end wall of the cylinder which forms the pumping chambers. Reciprocating movement of the piston and partition is converted into rotary motion through a cam follower mounted on the plate and moving in the cam track of a cylindrical cam.

Internal combustion engine with a supercharger

Abstract: An internal combustion engine provided with a supercharging system in which each cylinder head of the engine cylinders is provided with a valve controlled subordinate port connected to a pressurized intake air supply source, and valve actuating means actuates each valve of the subordinate inlet ports shortly before the piston within each cylinder comes into a compression stroke thereof so that the pressurized air flowing into the cylinder agitates and attenuates the fuel mixture sucked from the valve controlled inlet port.

One piece piston connected to a connecting rod for high speed four-stroke cycle internal combustion engines

Abstract: A one piece piston connected to a connecting rod, for high speed four-stroke cycle internal combustion engines, in which the piston top has a centrally arranged spherical combustion chamber with a constricted opening while the piston is made of cast iron, preferably of tough cast iron, or spheroidal cast iron, or malleable cast iron, and while the piston skirt below the piston ring grooves has two flattened surfaces located opposite to each other and perpendicular to the axis of the piston bolt and parallel to the piston axis. The flat surfaces are located approximately along the same plane as the outer wall of the spherical combustion chamber while bearings for the piston bolt extend at least approximately from flat surface to flat surface and while the connecting rod is firmly shrunk onto the piston bolt.

Air compressing four cycle reciprocating-piston internal combustion engine

Abstract: An air-compressing four-cycle reciprocating piston injection internal combustion engine forming a driving engine of a motor vehicle, to which is flangedly connected a transmission by way of a clutch; the connections between the internal combustion engine and the clutch and/or between the clutch and the transmission are provided with such reinforcements that the natural frequencies of the oscillatory system, which includes the masses of the internal combustion engine, of the clutch and of the transmission, are higher than the frequencies of the dangerous exciting oscillations caused by the internal combustion engine constructed as five-cylinder in-line internal combustion engine which cannot be compensated for with the use of acceptable expenditures.

High compression internal combustion engine using a lean charge

Abstract: A spring-loaded piston is slidably arranged in an auxiliary chamber opening into the combustion chamber of an internal combustion engine. The spring-loading of the piston is preset so that the piston retracts at a certain high pressure attained during the combustion process, thereby increasing the combustion chamber volume. This enables higher compression ratios to be used than is otherwise possible.

Internal combustion engine piston

Abstract: Internal combustion engine piston, particularly for diesel engines, with a bottom part and a top part which is connected separately thereto by means of an intermediate ring having a forked cross-section.

Scavenger mechanism for two-cycle internal combustion engine

Abstract: Apparatus adapted to be operated by the piston rod of an internal combustion engine to remove foul air and unburned fuel from the cylinders substantially at the completion of the power stroke and to introduce a fresh charge of a combustible mixture into the cylinder to be compressed on the compression stroke. The apparatus includes a scavenger plate located within the cylinder which is raised and lowered both independently of and in conjunction with the piston.

Rotary piston combustion engine

Abstract: A rotary piston combustion engine including a housing made up of a shell with multiarcuate inner surface and side parts. A polygonal piston is rotatably mounted on the eccentric of an eccentric shaft in the housing. The piston is provided with sealing parts to slide along the inner housing surfaces and to seal off adjacent working chambers from each other. Finally, means are provided for introducing a basic additive into the working chambers at least during the phase when the engine is running hot.

Mounting and cooling means for a rotary piston internal combustion engine on a motorcycle

Abstract: A motorcycle having an air cooled rotary piston internal combustion engine mounted on the motorcycle frame with its mainshaft oriented transversely of the frame and the engine minor axis being either horizontal or rearwardly, downwardly inclined, the engine being cooled by natural airflow only without need of an axial fan or blower.

Educational device for learning fundamentals of engine operation

Abstract: An educational kit for teaching the internal combustion engine is disclosed. The kit comprises an instructional system, a simulator board upon which is graphically depicted two schematic sectional views of the cylinder portion of a four stroke cycle internal combustion engine, and a plurality of pieces upon which are graphically depicted various of the major parts which constitute the internal mechanism of the engine.

Rotary piston four-stroke internal combustion engine

Abstract: A rotary piston four-stroke internal combustion engine of trochoid type includes a housing composed of a shell and two parallel end parts together bounding an inner chamber in which a polygonal position is rotatably mounted. Inlet and outlet passages are provided in the housing for supply of air or fresh gas and for ejection of burned gases, respectively. The inlet passage is connected with an intake duct and the outlet passage with an exhaust gas reactor. A line containing a valve leads from the region of the inner chamber in which compression takes place to the exhaust gas reactor.

Regenerative four stroke thermal engine - has rotary valve turned parallel to crankshaft axis

Abstract: The gas exchange for a four cycle thermal engine is regulated by a rotary valve situated in the cylinder head and driven at half crankshaft speed by an endless chain. The rotary valve has opening ports which connect with corresponding channels with the hot and cold side of the regenerator. A fuel injector is fitted between the cylinder and the rotary valve which sprays fuel near the opening port at the start of the expansion stroke. An inlet channel runs at a tangent to the rotary valve axis to connect the inlet with the cylinder opening.

Gas operated engine

Abstract: This is a multi-cylinder engine with a main piston and an auxiliary piston in each cylinder. The main piston is operated by means of compressed gas as a propellant. The auxiliary piston is operated by a hydraulic system controlled by movement of the main piston, and by a valve in the hydraulic system also controlled by movement of said main piston. The engine can have four engine cylinders. Compressed gas is sequentially applied to the cylinders for about 90° rotation of the crank shaft for each cylinder. The angular degree of rotation of the crank shaft during which compression gas is delivered to the individual cylinders can be varied while the engine keeps operating. Liquid gas vaporizes to gaseous state for use in the engine.

Roto-piston internal combustion engine

Abstract: An improved roto-piston internal combustion engine is provided which does not require irregularly-shaped parts, and in which the number of operating components is reduced to a minimum. The rotopiston internal combustion engine to be described includes a rotor which is rotatably mounted in a cylinder, and which incorporates a radial pocket. A piston is slidably mounted in the radial pocket, and it is coupled to the rotor by means of a ring connector and an eccentrically mounted disc, so that reciprocal movement of the piston within the pocket produces rotary movement of the rotor within the cylinder.

Ignition system of rotary piston engine

Abstract: An ignition system for a rotary piston engine adapted to effect intermittent ignition for preventing uneven running condition of the engine during engine braking. The ignition system includes a switching arrangement which is operative to deenergize the spark plug in cycles which are so predetermined as to cause the misignition in every second combustion stroke in response to predetermined conditions representative of engine braking condition.