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Avl Gesellschaft Fur Verbrennungskraftmaschinen Und Messtechnik M.b.h.

Hans List

Simmering-graz-pauker Aktiengesellschaft

Josef Greier

Othmar Skatsche

Heinz Fachbach

Karl Kirchweger

Gerhard Thien

Bertram Obermayer

Diethard Plohberger

Peter Herzog

Christof D Fischer

Colin T Pomfret

Keith Elliott

Johann Wagner

Fritz Freyn

Helmut Foidl

Walter Mandl

Bernd Pfeifer

In a method and device for feeding fuel into a combustion chamber of a cylinder of an internal combustion engine the following steps are discerned to withdraw a small amount of compressed hot gas via a valve opening into the combustion chamber of the cylinder during one working cycle, to store this small amount of hot gas withdrawn, in a valve chamber of the valve, to inject fuel into this valve chamber containing the small amount of hot gas, building a fuel-gas mixture, and to inject the fuel-gas mixture through the valve opening into the combustion chamber of the cylinder during next working cycle of the internal combustion engine.

Method and device for feeding fuel into the combustion chamber of an

A water-cooled internal combustion engine with direct fuel injection and in hich the cylinders are arranged in banks forming the shape of a V, the V-shape space between the cylinder banks is adapted as a receiving chamber for combustion air and for the accommodation of means for fuel injection by individual pumps associated with each cylinder. The provision of a single camshaft is arranged parallel to the cylinder banks and centrally above the receiving chamber and in that the push rods of the inlet and exhaust valves as well as the individual pumps are directly driven by the camshaft.

Water-cooled internal combustion engine with direct fuel injection

A controllable operating spindle includes a decompression cam mounted thereon, which cam is able to keep a valve actuation-movement transmitting element in a position which is spaced away from the position determined by a base circle of a cam on the engine camshaft. A ratchet wheel is connected to the operating spindle which extends along the length of and parallel to the engine camshaft and is adapted to co-act with a trip element for restoring the decompression cam to its original position. The operating spindle includes at least one decompression cam for each cylinder of the engine and between the decompression cam and the valve actuation-movement transmitting element there is provided a decompression lever which influences the transmitting element in accordance with the lift of the decompression cam.

Decompression device in an internal combustion engine

In a water-cooled, multi-cylinder internal combustion engine, which comprises cylinders and a cooling jacket, the cylinders are connected in the lower region thereof to each other and to the cooling jacket, and crankshaft main bearings consisting of two parts which are mutually connected by means of main bearing bolts, the lower ends of the cylinders are connected to the cooling jacket at a height from the bottom edge of the cylinders corresponding to 0.5 to 0.75 times the cylinder diameter, and downwards from this level the lower cylinder ends are connected to each other but otherwise free and unconstrained, and the threads for the main bearing bolts are arranged at a height from the bottom edges being at least that great as the distance of the connection between the cylinders to the bottom edges. Thereby, reaction forces from the main bearing bolts are transmitted directly to the region above the connection between the cylinders and the cooling jacket or are transmitted through the junction between the cylinders and cooling jacket and distributed to the cylinders and the cooling jacket in that region thereof which is above the junction. The unconstrained lower end of each cylinder is free from reaction forces thus avoiding unacceptable deformation in this region. Also, it is possible to choose a comparatively small working clearance between piston and cylinder which means less noise generation. Moreover, piston rings with lower tensions may be used, which means lower friction and, owing to the drastically reduced liner deformation, also less oil consumption.

Water-cooled, multi-cylinder internal combustion engine

An air-cooled internal combustion engine has a cylinder barrel which is detachably fastened in an opening of the crankcase by means of a bearing ring screwed from the inside of the crankcase on an external thread of the cylinder barrel. A flange of the bearing ring lies close to the inner surface of the crankcase and a ring nut is screwed from the outside of the crankcase on an external thread on the bearing ring, whereby the cylinder barrel is fixedly secured relative to the crankcase.

Air-cooled internal combustion engine

In a water-cooled, multi-cylinder internal combustion engine, which comprises a cylinder block, a cylinder head, and a cooling jacket, all cast in one piece and wherein the cylinder head comprises, for each cylinder of the cylinder block and on one longitudinal side thereof, an intake and exhaust duct as well as valve guide sockets and on the other longitudinal side a mounting socket for an injection nozzle or sparking plug, forming a connection between the end wall of the cylinder and the cooling jacket, at least one fin is provided on the side where the mounting socket is arranged to make an additional connection between the end wall of the cylinder and the cooling jacket. This arrangement compensates for the differential section modulus between the two longitudinal sides of the cylinder head regarded as a bending section, that is to say, the neutral axis of the cylinder head is shifted, at least approximately, back into the plane which contains the cylinder axes. This achieves an even distribution of combustion forces from the end wall of the cylinder to the cooling jacket and by comparison with the conventional arrangement reduces noise emission from the exposed longitudinal sides of the cylinder head.

In an internal combustion engine the power generating parts mainly responsible for body resonance and sound vibration such as the crankshaft (3), cylinder block and cylinder head (35) are combined in a power unit which is supported in the crankcase (4) on elastic vibration-absorbing mountings (2) with the sidewalls of the crankcase (4) extending above the crankshaft axis (3). By this arrangement the crankcase (4) is free from direct vibrations leaving other non-power transmitting engine parts mounted above the crankcase (4) which require means to suppress radiated noise. In one embodiment the induction manifold (7) and mounting parts (13, 14) thereof together with the rocker cover (20) are insulated from the cylinder head (35) by vibration-absorbing elements (8,15,16,21,26) and are so shaped and arranged that they provide a screen for noise radiated from the cylinder head (35). Thus, essential parts of the engine have the secondary function of reducing the level of noise emitted by the engine.

Low-noise level internal combustion engine

In an internal combustion engine comprising a crankshaft (7) and crankshaft main bearings (6), an engine unit support (1) which supports the crankshaft main bearings, and a cylinderhead (3) mounted on the engine unit support (1), which are engine parts directly affected by body resonance and sound vibration, at least one vibration absorbing and power transmitting element (15) located between the engine parts directly affected by sound vibration and the crankcase (8), a sealing element (21) located in a joint between a engine unit support (1) and the crankcase (8) which seals an encapsulated upper dry engine region oil-tightly against a lower oil-wetted engine region (22), an elastic filling element (19) bridging at least a part of the joint being inserted into the joint before the mounting of the sealing element (21) and supporting the latter, whereby the sealing element (21) comprises a viscous material forming an adhesive compound with metal which is resilient after curing. Thus, the rubber material of the vibration absorbing elements (15) can be chosen without regard for the oil-resistance and customary vibration absorbing elements can be used without a specific adaption. Furthermore, this arrangement of the sealing element does not require a specific machining of the surfaces lying close to the sealing element.

Internal combustion engine

As a counterbalance for an internal combustion engine a counterbalanceweight (7) driven by a crankshaft (2) of the engine by means of a non slipping drive is pivoted on a shaft (6) and combined with the driven part (8) of the non slipping drive. As a stretching or tensioning arrangement for the transmission means (9) of the non slipping drive, the shaft (6) supporting the counterbalanceweight (7) is provided with an eccentrically arranged journal pin (10) pivoted and lockable in the housing (1) of the engine.

Counterbalance for an internal combustion engine

A multicylinder internal combustion engine with a crankcase secured to a connection flange of the cylinder block and a flywheel at the output end of the crankshaft, the distance between the connection flange and the crankshaft axis corresponding approximately to half the diameter of the flywheel.

Multicylinder internal combustion engine

Low-noise-level internal combustion Vee-engine with a skeletal engine unit support and the cylinder head mounted thereon, auxiliary units rigidly connected to the skeletal engine unit support and the cylinder head, an engine case surrounding the engine unit support and connected to same by at least one sound-absorbing member.

Low-noise-level internal combustion Vee-engines

An internal combustion engine having a noise suppressing encapsulation, said encapsulation being ventilated by a blower and cooling air ducts being formed within the encapsulation by means of partitions, one of said cooling air ducts comprising all fuel and oil leading engine parts and the other cooling air duct being imperviously divided from the first one comprising the parts of the exhaust system.

Internal combustion engine having a noise suppressing encapsulation

A ventilation system for an encapsulated internal combustion engine providing a reduction in short-circuit air flow from the pressure side to the suction side of the ventilation radial fan.

Internal combustion engine ventilation

A motor vehicle has an engine equipped with an oil sump which is secured in a body-sound-insulated manner to the engine block, and a fan-cooled water radiator, a frame-mounted elastic membrane being provided between the oil sump and the vehicle body components so that the membrane completely encircles the oil sump at its upper edge and provides an acoustic separation between the spaces respectively situated above and below the oil sump, the upper space comprising a sound suppressing encapsulation which is closed relative to the vehicle interior by appropriate wall panels, partitions and sealing sections provided in the vehicle body. The outflow of hot cooling air from the radiator completely by-passes the encapsulation, the sealed upper space of the encapsulation being cooled by the forced draught of a further fan, and sound absorbing silencers being provided at inlet and outlet openings for the cooling air in the encapsulation.

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Graz, Austria

Josef Greier