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

Avl List Gmbh

Peter Herzog

Josef Greier

Diethard Plohberger

Herwig Ofner

Christof D Fischer

Thomas Kammerdiener

Keith Elliott

Michael Glensvig

Franz Chmela

Klemens Neunteufl

Theodor Sams

Andreas Wimmer

Janos Csato

Peter Christian Meurer

Helmut Eichlseder

Christian Fuchs

Gerhard Pirker

Guenter Figer

Michael Weissbaeck

The invention relates to a direct-injection internal combustion engine that is operated in a first operating range associated with the low part load, with largely homogeneous combustion of the mixture and subsequent injection. Said internal combustion engine is operated in a second operating range associated with the middle part load, with low-temperature combustion of the mixture. In this way, minimum nitrogen oxide and soot emissions and a high degree of efficiency can be achieved both in the lower part load region and up to the full load region.

Method for operating an internal combustion engine

The invention relates to a variable valve train ( ) for a cam-actuated lifting valve ( ) of an internal combustion engine, which valve ( ) is loaded by a closing spring ( ) acting against the direction of opening, with an approximately cylindrical force application element ( ) located between a cam ( ) and the valve ( ), whose length can be adjusted hydraulically and whose exterior cylindrical wall face ( ) is slidable in a fixed guide cylinder ( ), said element ( ) being provided with a pressure piston ( ) longitudinally slidable in a cylinder ( ), which piston ( ) is adjacent to a pressure chamber ( ) into which opens a pressure channel ( ) departing from a port ( ) in the wall face ( ) of the force application element ( ), a fixed pressure line ( ) opening into the guide cylinder ( ) in the area of the port ( ), which line ( ) can be subjected to hydraulic high pressure (p ) permitting hydraulic activation of the valve ( ). In order to obtain a variable valve train ( ) independet of crank angle (KW) in as simple a manner as possible, a permanent flow connection is provided between pressure line ( ) and pressure channel ( ) independently of the position of the force application element ( ).

Variable valve train for a cam activated lifting valve of an internal combustion engine

To provide an injection system for an internal combustion engine operating on self-igniting liquefied gas as a fuel, and to minimize cavitation and related problems of fuel delivery as well as wear, the fuel tank is configured as a low-pressure storage tank which is connected to a pressure control unit that includes a fuel pumping unit for drawing fuel from the storage tank and delivering the fuel to the suction line of the fuel delivery device and a pressure release line which branches off the suction line and leads back to the storage tank, the pressure release line including a release valve for maintaining a constant interior pressure in the suction line above the vapor pressure of the liquefied gas. The injection system is configured as a leakage-free system.

Injection system for an internal combustion engine

To provide an injection system for an internal combustion engine operating on self-igniting liquefied gas as a fuel, and to minimize cavitation and related problems of fuel delivery as well as wear, the fuel tank is configured as a low-pressure storage tank which is connected to a pressure control unit maintaining a constant interior pressure at a level above that of the vapor pressure of the liquefied gas, preferably at 6 to 30 bar, approximately, and further the injection system is configured as a leakage-free system.

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

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Graz, Austria

Peter Herzog