Audi Ag

Hydraulik-ring Gmbh

Entec Consulting Gmbh

Wilhelm Hannibal

Michael Paul

Klaus Fuoss

Andreas Knecht

Max Ruf

Johannes Steinwart

Rudolf Flierl

Andreas Wild

Gerlinde Bösl-Flierl

Michael Jubelt

Rudolf Bierling

Peter Hubschle

Klaus Fuob

In order to produce a variable valve lift device for the lift adjustment of the gas-exchange valves of an internal combustion engine, by means of which with adjustment forces and holding forces, independently from whether said holding forces and adjustment forces are applied mechanically, hydraulically or electrically, with an adjustment of the valve lift being as cost-effective as possible, and with maximum accuracy of the adjustment or control of the valve lift to be taken between the individual cylinders of a multi-cylinder internal combustion engine, and, moreover, the adjustment possibility of the valve lift of the valves of an internal combustion engine with several cylinders is obtained within smallest tolerances, it is suggested that a valve lift device () has a rotatable eccentric shaft (), which consists of several eccentrics () and whereby all possible contours of the eccentrics () are positioned within a circle, which is formed by means of the external diameters of a bearing () of the eccentric shaft ().

Variable valve lift device for the lift adjustment of gas-exchange valves of an internal combustion engine

Multi-cylinder internal combustion engine

Valve actuating mechanism for an internal combustion engine

A valve actuating mechanism is proposed for an internal combustion engine in which at least one intake valve E is actuatable optionally by a low-speed cam 2 or a high-speed cam. The first rocker lever 5 operates in conjunction with the low-speed cam 2 and the valve E, while the second rocker lever 8,9 operates in conjunction with the high-speed cam 7 and can be connected to the first rocker lever by means of a coupling bolt 12 mounted in a bore 10 of the first rocker lever 5 which is aligned with a bore 11 in the second rocker lever 8, 9 when both rocker levers are riding on the base circles of their cams. The coupling bolt 12 is moved into the coupling position against the force of a spring 17. The spring 17 rests on one side on the end of a pipe 20 connected to the coupling bolt 12 and on the other side on an insert 18 introduced into the bore 10, the pipe 20 extending through this insert 18. In order to achieve brief switching periods, the pipe 20 is provided in the vicinity of the reverse side 31 of the coupling bolt 12 with a cross hole 28 through which quick pressure increase and decrease on the reverse side 30 of the coupling bolt 12 is effected.

A valve mechanism for an internal-combustion engine with at least two valves 1 per cylinder which can be actuated by cams 2, 7 of a camshaft 3 via rockers 4, 6. The rockers are mounted pivotally next to one another on a common fixed shaft 5, and they bear with sliding surfaces 8 against their cams. The rockers are pressed against one another by a spring 10, and their sliding surfaces 8 are aligned at least intermittently with one another and then form an essentially continuous surface. The camshaft 3 has a longitudinal channel 13 which is connected to a lubricant source and from which extends, for the lubrication of a plurality of sliding surfaces, a lubricating-oil bore 14 which opens out on the circumferential surface of a cam 7 cooperating with one of these sliding surfaces.

Valve mechanism for an internal-combustion engine

Drive arrangement for a camshaft fitted in the cylinder head of an

Drive arrangement for a camshaft in an internal combustion engine

A double-flow butterfly valve part (1) contains two butterfly valves (4 and 6), which are connected together by means of a coupling element (10). The second butterfly valve (6) is opened only when the first butterfly valve (4) is moved beyond a partially open position into the completely open position. To make it possible to shift the two butterfly valves (4 and 6) back by means of a single restoring spring acting on the first butterfly valve (4), a desmodromic control is provided between the coupling element (10) and the second butterfly valve (6). For this purpose, a lever (9) is disposed on the shaft (7) of the second butterfly valve (6). This lever (9) contains an arched slot (12), which is engaged by a roller (13) mounted in the coupling element (10). The coupling element (10), in turn, is provided with an arched slot (14), which is engaged by a roller (15) mounted in the lever (9).

Double-flow butterfly valve part

Growing community of inventors

Neckarsulm, Germany

Wilhelm Hannibal