Reciprocating-piston internal combustion engine

Abstract

A reciprocating-piston internal combustion engine has a crank drive and a transmission lever indirectly coupled with the piston and intersecting the cylinder axis. The lever is articulated onto the crank drive's connecting rod and onto an adjustable bearing guided in the cylinder block. For greater variation of the translation of movements between crank drive and piston, the pulling and pushing rod connected with the piston has a guide at its end facing the transmission lever. The guide is preferably a pivotally-mounted slide shoe that engages into a guide extending along the transmission lever. The transmission lever is pivotally connected with the crankshaft connecting rod and connected with a setting drive for variably setting the articulation of the pulling and pushing rod on the transmission lever. A guide lever pivotally connected with the pulling and pushing rod and pivotally articulated onto the cylinder block guides the pulling and pushing rod.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other objects and features of the present invention will become apparent from the following detailed description considered in connection with the accompanying drawings. It should be understood, however, that the drawings are designed for the purpose of illustration only and not as a definition of the limits of the invention.

In the drawings, wherein similar reference characters denote similar elements throughout the several views:

FIG. 1 shows schematically the drive mechanism of a reciprocating-piston internal combustion engine according to an embodiment of the invention in a setting for low stroke;

FIG. 2 shows the same drive mechanism corresponding to FIG. 1, but in a setting for high stroke;

FIG. 3 shows the drive mechanism in a setting according to FIG. 2 for high stroke, but with a setting of the crankshaft at which the piston reaches the bottom dead center;

FIG. 4 shows schematically a variant of the drive mechanism of a reciprocating-piston internal combustion engine according to another embodiment of the invention, in a setting for high stroke and a setting of the crankshaft at which the piston reaches the bottom dead center;

FIG. 5 shows the drive mechanism according to FIG. 4, but in a setting for low stroke;

FIG. 6 shows the drive mechanism according to FIG. 5, but with a setting of the crankshaft at which the piston reaches the top dead center;

FIG. 7 shows the drive mechanism according to FIG. 6, but in a setting for low stroke;

FIG. 8 shows schematically another variant of the drive mechanism of a reciprocating-piston internal combustion engine according to another embodiment of the invention, in a setting for high stroke;

FIG. 9 shows the same drive mechanism corresponding to FIG. 8, but in a setting for low stroke and a setting of the crankshaft at which the piston reaches the top dead center; and

FIG. 10 shows the drive mechanism in a setting according to FIG. 9 for low stroke, but with a setting of the crankshaft at which the piston reaches the bottom dead center.

Claims

1. A reciprocating-piston internal combustion engine comprising: (a) a cylinder block;(b) a cylinder having a cylinder axis disposed in said cylinder block;(c) an adjustable bearing guided in said cylinder block;(d) a piston movable in said cylinder;(e) a crank drive having a connecting rod;(f) a transmission lever indirectly coupled with said piston and intersecting the cylinder axis, said transfer lever being articulated onto said connecting rod at an articulation location and onto said adjustable bearing and having a guide extending along the transmission lever;(g) a pulling and pushing rod connected with said piston and engaging into said guide;(h) a guide lever pivotally articulated onto said pulling and pushing rod and pivotally articulated onto said cylinder block on a side of said guide lever facing away from said pulling and pushing rod; and(i) a setting drive for adjustably displacing said transmission lever relative to the articulation location of said transmission lever with said pulling and pushing rod.

2. The reciprocating-piston internal combustion engine according to claim 1, wherein the pulling and pushing rod is connected with the transmission lever by way of a slide shoe mounted on the pulling and pushing rod so as to pivot, the slide shoe engaging into said guide that extends along the transmission lever.

3. The reciprocating-piston internal combustion engine according to claim 1, wherein the pulling and pushing rod engages into an oblong hole of the transmission lever with a journal.

4. The reciprocating-piston internal combustion engine according to claim 1, wherein the guide lever is pivotally mounted on the cylinder block.

5. The reciprocating-piston internal combustion engine according to claim 1, wherein the transmission lever comprises a displaceable bearing disposed in the cylinder block and guided crosswise to the cylinder axis.

6. The reciprocating-piston internal combustion engine according to claim 1, further comprising a bearing guide running at an incline and oriented crosswise to the cylinder axis.

7. The reciprocating-piston internal combustion engine according to claim 1, wherein the guide lever is articulated onto a displaceable slide guide that is vertically displaceable on the cylinder block so as to pivot.

8. The reciprocating-piston internal combustion engine according to claim 7, wherein the setting drive for displacing the articulation location of the pulling and pushing rod on the transmission lever comprises a worm wheel that can be pivoted by way of a driven worm shaft about a pivot point, an advancing lever and a rocker, said advancing lever having a first lever end pivotally disposed on said worm wheel at a distance from said pivot point and a second lever end pivotally connected with the displaceable slide guide and the guide lever, said rocker having a first rocker end pivotally disposed on said worm wheel at a distance from said pivot point and a second rocker end pivotally connected with an end of the transmission lever.

9. The reciprocating-piston internal combustion engine according to claim 7, wherein the rocker is pivotally disposed by way of a two-beat lever that is pivotally mounted on the cylinder block so as to pivot about a lever pivot point of said two-beat lever.