Showing papers on "Four-stroke engine published in 1971"

Hot gas rotary piston engine

Abstract: A hot gas engine in the form of a rotary piston engine of trochoidal construction in which two rotary piston engines operate with predetermined phase displacement, of which one is constructed as hot gas section and the other one as cold gas section; each rotary piston engine includes a triangular piston rotatably supported on an eccentric shaft within an epitrochoidally shaped two-arched housing case whereby inlet and outlet openings are provided in the contact surface of the casing in front and to the rear of the minor axis; the inlet and outlet openings are arranged both in the hot gas section as also in the cold gas section mutually opposite one another and are connected with each other by way of branch lines provided with control devices and main lines that include heaters, regenerators and coolers interconnected in the main lines.

Multi-cylinder crankshaft machine, in particular a reciprocating pump or compressor

Abstract: The main object of the invention is a multi-cylinder crankshaft engine the crankshaft of which is non-positively supported between its bearings on the side opposite to the engine pistons, for instance by spring means and preferably by a fluid pressure varying substantially proportionately to the variation of the force exerted by the engine pistons to the crankshaft.

Arrangement of air compressor at a reciprocating piston internal combustion engine

Abstract: An arrangement of an air compressor which includes at least one piston connected with a crankshaft, at a piston internal combustion engine, particularly at a truck engine, in which the crankshaft of the air compressor is supported in the control housing adjoining the output side of the engine whereby the air compressor cylinder or cylinders are mounted on the control housing

Free piston engine starting apparatus

Abstract: Apparatus and method features are disclosed for starting free piston engines, and particularly for initiating combustion on the first power stroke of such an engine or on a recycled starting stroke. Such an initial power stroke is achieved by spark ignition of a suitable mixture in a combustion chamber of the free piston engine, preferably in the power cylinder. The first combustion is obtained at a pressure relatively lower than the compression ratio used for combustion during normal operation. Thus one may even use a negligible compression within such chamber to provide a first power stroke which initiates movement of the engine, but which provides substantially less dirving force than that which is provided by a regular power stroke once such an engine is running.

Hot gas engine constructed as rotary piston engine

Abstract: A hot gas engine in the form of a rotary piston internal combustion engine of trochoidal type of construction in which one or several pairs of working chambers of the rotary piston engine serve as warm and cold spaces of the hot gas engine which are connected with one another.

Exhaust system for a diesel engine

Abstract: An exhaust system for a high-performance diesel engine in which at least one of the engine cylinders exhausts directly into a turbocharger associated with the engine and the balance of the engine cylinders exhaust into regions of lower pressure in a main pipe in communication with the turbocharger. The system provides the best features of a constant velocity and a constant pressure system.

Control installation for the cooling air fan of internal combustion engines

Abstract: A control installation for the cooling air fan of an internal combustion engine which is driven from the engine by way of a hydraulic coupling, in which the admission of the hydraulic medium to the hydraulic coupling is controlled by utilizing the expansion of the engine housing caused by the operating temperature of the internal combustion engine as the adjusting magnitude for the control device.

Rotary piston engine with exhaust recirculating device

Abstract: A rotary piston internal combustion engine provided with an exhaust recirculating device for effecting the reduction of both the nitrogen oxide content and the noxious unburned compounds present in the automobile exhaust gas and concurrently improving the engine power output with efficient fuel consumption by recirculating a portion of the exhaust gas from the engine working chamber under the power stroke to the engine working chamber under the compression stroke in response to the rotation of the power output shaft.

Turbocharged piston engine having improved economizer and self ignition

Abstract: A conventional turbocharged internal combustion engine of either 2 stroke cycle or 4 stroke cycle having auxiliary mechanism adapted to capture hot products of combustion or exhaust gas and by compression elevated heat provides ignition, superheated steam expansion energy and includes an exhaust turbine for utilization of powerful blowdown energy and by great reduction of final exhaust temperature facilitates condensation of combustion compounded water for recirculation through an included water reclamation and combustion cooling system.

Two-stroke engine piston stuffer

Abstract: A crankcase mounted body projecting upwardly into the cylinder bore of a two-cycle internal combustion engine of the type utilizing crankcase air and fuel induction and bypass passages for ducting the air and fuel mixture from the crankcase into the cylinder above the piston therein as the piston approaches its lowermost position in the cylinder. The body is specifically shaped to have the piston telescoped downwardly thereover as the piston approaches its lower limit in the cylinder and the body, by its volume, reduces the total volume of the associated crankcase and lower cylinder bore whereby crankcase back pressure on the downstroke of the piston is increased for a greater discharge of air and fuel mixture into the cylinder above the piston. In addition, the body includes portions thereof which project substantially upwardly into the associated piston when the latter is at its lowermost position and which therefore serve to pump normally static air and fuel mixtures from within the piston each time the latter is telescoped downwardly over the body to thereby facilitate internal cooling of the piston.

Circular piston internal combustion engine

Abstract: A circular piston internal combustion machine with trough-shaped depressions in the circumferential direction of the piston, in which fuel flow deflecting means are provided in said troughshaped depressions for deflecting the fuel flow in the axial direction of the piston which is rotatable relative to the housing.

Improvements in or relating to combustion chambers in i.c. engines

Abstract: 1,224,726. I.C. engine combustion chambers. AUTOMOBILOVE ZAVODY NARODNI PODNIK. March 14, 1969 [March 15, 1968], No.13529/69. Heading F1B. A four stroke I. C. engine combustion chamber has a part in the cylinder head having a defining surface comprised of two plane surfaces 15, 16, Fig.2 meeting in an apex and is kidney-shaped and another part 3 in a piston. The centre point of the part 3 may lie either on a connecting line or within margins up to 15% of the piston diameter on either side of a line connecting the spark plug and the centre point (6), Fig. 1 (not shown) of an anti-knock projection 8, Fig.4 formed in the cylinder head. The periphery of the anti-knock projection when viewed in plan may coincide with or lie inside or outside of the periphery of part 3. During combustion the flow of mixture 9, from the anti-knock projection 8 causes individual pockets 11, 12 of mixture to advance in the direction of the arrows. This causes an increase in the surface area of the flame front and improves combustion.

Valve seat material for an internal combustion engine

Abstract: A VALVE SEAT OF AN INTERNAL COMBUSTION ENGINE IS COMPOSED OF AN ALLOY OF 0.3-20% BY WEIGHT OF LEAD, 5-45% BY WEIGHT OF COPPER OR COPPER OXIDE, 0.2-4% BY WEIGHT OF CARRBON, THE BALANCE BEING IRON.