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

Avl Gesellschaft

Christof D Fischer

Diethard Plohberger

Karl Wojik

Josef Greier

Peter Herzog

Keith Elliott

Klaus Landfahrer

Volker Pichl

Hans Alten

Wolfgang Petutschnig

Cylinder head of an internal combustion engine with more than two valves in overhead arrangement for each cylinder, which are actuated via rocker arms, each rocker arm being individually supported on the cylinder head by means of a bridge. A compact design is achieved by providing a valve bridge for actuation of every two valves of identical function, which valve bridge is attached to the bridge. At least one of the two rocker arms per cylinder acts on a valve bridge supported by the bridge, the pivots of the rocker arms having different distances from the center plane of the cylinder.

Cylinder head of an internal combustion engine

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opening into the combustion chamber of the cylinder during one working cycle, to store this small amount of hot gas withdrawn, in a valve chamber of the valve, to inject fuel into this valve chamber containing the small amount of hot gas, building a fuel-gas mixture, and to inject the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 hydraulically operated valve with controlled lift, in particular a fuel/gas injection valve for internal combustion engines, has a stop face fixed on the valve stem. For accurate control of the opening of the valve a stop cam is provided, which is drivn mechanically via a friction clutch, and which cooperates with the stop face. By rotating the cam through a predetermined angle the maximum valve lift will be obtained. The cam may be brought into contact with the stop face even in the closed position of the valve.

Hydraulically operated valve with controlled lift

In an exhaust system for two-stroke cycle engines, comprising an exhaust pipe whose front end, which is characterised by a constant cross-section, is followed by two or more conical sections, these conical sections are configured as diffusers, which are connected to the front end of the exhaust pipe with its constant cross-section by means of branch pipes of different length, and which open into a common exhaust header at the other end, which header in turn is connected to the exhaust tail pipe comprising a catalytic converter and/or a silencer. This arrangement has the effect that a pressure wave coming from the cylinder is twice reflected as a suction wave arriving at the still open exhaust port at different times due to the difference in pipe length. In this manner the effective duration of the suction wave is prolonged over that of comparable exhaust systems of a known kind.

Exhaust system for two-stroke cycle engines

To improve control of the scavenging in accordance with the load and speed conditions in a two-stroke internal combustion engine with scavenge passages which open into the interior of the cylinder and an outlet passage and with scavenge ports and an outlet port governed by the piston of said internal-combustion engine, the present invention provides that communication with said scavenge passages is governed by an electromagnetically unlocking pressure-controlled valve, which is positioned in a passageway section and actuation of which within the opening periods of the scavenge ports, blocks the flow of the scavenging agent to the individual scavenge ports to the effect that the period of scavenging is timed relative to the load and speed conditions under which the internal-combustion engine is working.

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Graz, Austria

Christof D Fischer