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

Prof.dr.dr.h.c.hans List

Othmar Skatsche

Josef Greier

Hans List

Gerhard Feichtinger

Bertram Obermayer

Helmut Melde-Tuczai

Heinz Fachbach

Gerhard Thien

Johann Wagner

Johann Aigner

Karl Kirchweger

Bruno Schukoff

Robert Hofer

Josef Rachholz

An engine brake in an internal combustion engine for use in motor vehicles, comprising an exhaust valve controlled by a cam via a follower lever, and a device for leaving the exhaust valve slightly open during the combustion stroke. According to the invention the support bearing of the follower lever is designed to be adjustable in the direction of the supporting force P between two extreme positions, i.e. one corresponding to normal operation and the other one to braking, such that on braking the exhaust valve is lifted by 0.3 to 3 mm, preferably 0.5 to 2 mm, during the phase in which the base circle of the cam is in contact with the follower lever.

Engine brake of an internal combustion engine

An injection-type internal combustion engine with cylinders arranged in line, with two overhead camshafts, and four valves and a central pump nozzle for each cylinder, and with detachable rocker arms being provided on the cylinder head above the respective camshaft, for actuating the pump nozzles. With this arrangement, the cams for the rocker arms actuating the pump nozzles are operated from the two camshafts in turn, i.e., the first camshaft actuates the pump of one cylinder and the second camshaft actuates that of the adjacent cylinder, each rocker arm being mounted separately. This will facilitate assembly and disassembly of the pump nozzle including the corresponding actuating mechanism and valve gear.

Injection-type internal combustion engine

In an internal combustion engine with cylinders inline and an overhead camshaft for actuation of the intake and exhaust valves, the camshaft is driven from the crankshaft by means of a driving gear and an intermediate shaft, the driving gear being rigidly connected to an outer cheek of the crankshaft. With this arrangement the distance between the crankshaft bearings remains unchanged and a minimum overall length of the engine is achieved. At the same time a speed reduction gear may be located anywhere between the crankshaft and the camshaft.

Internal combustion engine

Dry cylinder-liners are partly inserted into the liquid cooled lower part a common cylinder head, which is fastened to an upwardly extended crankcase by means of crankshaft main bearing studs having their threads at the level of the inserted parts of the liners. Thus, cylinders and crankcase are stress-relieved, permitting a simple design and the use of less expensive materials and production methods.

Internal combustion, reciprocating piston, liquid cooling engine

A two cylinder engine has a reverse scavenging system with exhaust ports itioned on either front end of the cylinder block and directed towards areas without any ports which are located next to each other in the center of the engine. Intake ports are directed towards either side wall of each cylinder where they open into charge compartments which are closed, e.g., with covers whose dimensions will permit milling and core-pulling tools to have access to the intake ports. Between the port-free areas of the cylinders a gap is provided which connects the water jackets of the cylinders in the upper part and the charge compartments in the lower part thereof.

Water-cooled two-stroke internal combustion engine

An internal combustion engine whose engine unit support, comprising such sound-generating parts as cylinders, cylinder head, piston rods, crankshaft bearings, crankshaft, is provided with a bracket of at least two arms at least at its output end. This bracket is attached to the bearing seats of the crankshaft and is provided with at least one sound-insulating element at each end of its arms for connecting said engine unit support to the crankcase. This will reduce any relative movements between the crankshaft and the crankcase in a simple manner.

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

A water-cooled internal combustion engine includes piping defining a hydraulic oil circuit having an oil pump and using hydraulic oil lubrication and a cooling-water pump driven as a function of the operating condition of the engine. The hydraulic motor is provided in the circuit for the drive of the cooling-water pump which, by means of a control element, can be switched into the hydraulic oil circuit of the internal combustion engine.

Water-cooled internal combustion engine using hydraulic-oil lubrication

An assembly of auxiliary equipment for a water-cooled internal combustion engine having an oil pump, a water pump and an oil cooler/oil filter unit, wherein the oil pump, water pump and oil cooler/oil filter unit are provided as separate interchangeable subassemblies and are combined and interconnected into a constructional unit that can be mounted on the engine.

Assembly of auxiliary equipment for a water-cooled internal combustion

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 with an engine unit support (1) comprising parts directly affected by body resonance as, e.g., cylinder block (2), cylinderhead (3), crankshaft (7) and crankshaft bearings (6), the engine unit support is connected to the crankcase (8) by means of several vibration absorbing and power transmitting elements (29) whereby the crankcase is insulated against body resonance. A sealing element (40; 44) is arranged between the engine unit support (1) for the crankcase (8) and sealing a lower oil-wetted part (15) of the engine oil-tightly against an upper dry part. The vibration absorbing elements (29) are mounted on the one side at the walls (25, 26) of the crankcase (8) and on the other side at the main bearing walls (20, 21) of the engine unit support in the region of the crankshaft axis (22). Thereby, undesireable great deflections of the engine unit support in the region of the crankshaft axis can be avoided and the stressing of the elastic coupling between the flywheel and the gear unit or the elastic sealing elements, respectively, is considerably decreased.

Low-noise-level internal combustion engines

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.

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 comprises an engine unit support which contains the engine parts directly affected by body resonance (cylinderhead, cylinder, piston, connecting rod, crankshaft main bearing, and crankshaft) and a crankcase connected to the engine unit support by flanges located above the crankshaft. The crankshaft main bearings consist of bearing blocks and bearing caps which are connectable to main bearing units independently from the main bearing bolts. The bearing units are detachably secured to the engine unit support. The crankcase is provided with at least one aperture closed by at least one cover part below the crankshaft, said apertures providing access to the main bearing bolts. Dismounting of the engine unit support is enabled with the crankshaft and the main bearing units mounted thereon remaining in the crankcase and the crankcase remaining mounted on its place, for instance in a vehicle.

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Graz, Austria

Othmar Skatsche