Multi-joint crank drive of an internal combustion engine and method for operating a multi-joint crank drive

A crank-link mechanism and multi-link technology, applied in combustion engines, machines/engines, mechanical equipment, etc., can solve problems such as affecting the smooth operation of internal combustion engines, reduce knocking tendency, effectively utilize, and reduce ventilation effect of loss

Active Publication Date: 2016-06-29
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This affects the smooth operation of the internal combustion engine

Method used

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  • Multi-joint crank drive of an internal combustion engine and method for operating a multi-joint crank drive
  • Multi-joint crank drive of an internal combustion engine and method for operating a multi-joint crank drive
  • Multi-joint crank drive of an internal combustion engine and method for operating a multi-joint crank drive

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Embodiment Construction

[0027] figure 1 A perspective view of a region of an internal combustion engine 1 is shown, which is present, for example, as a serial internal combustion engine, in particular a four-stroke four-cylinder serial internal combustion engine. Internal combustion engine 1 has a crankshaft 2 and a plurality of pistons 3 (here: four pistons 3 ), wherein each piston is movably mounted in one of the plurality of cylinders of internal combustion engine 1 . Each of the pistons 3 is connected to the crankshaft 2 via a piston connecting rod 4 . The crankshaft 2 is rotatably mounted in bearings, also not shown, of a cylinder crankcase (not shown here) of the internal combustion engine 1 and has, for example, a plurality of central journals 5 for bearing and a plurality of pin journals 6 (of which only one can be seen in each case in the figures), their longitudinal center axes are offset in different angular orientations parallel to the axis of rotation 7 of the crankshaft 2 .

[0028] T...

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Abstract

The invention relates to a multi-joint crank drive (10) of an internal combustion engine (1), comprising a plurality of coupling members (11) rotatably supported on crank pins (6) of a crankshaft (2) and a plurality of articulation connecting rods (15) rotatably supported on crank pins (19) of an eccentric shaft (8), wherein each of the coupling members (11) is pivotably connected to a piston connecting rod (4) of a piston (3) of the internal combustion engine (1) and to one of the articulation connecting rods (15). According to the invention, in order to reduce free mass forces of the second order, the multi-joint crank drive (10) is designed or adjusted in such a way that a crankshaft rotational angle range of an intake phase is greater than 180 degrees; that a crankshaft rotational angle range of a compression phase is less than 180 degrees; that a crankshaft rotational angle range of an expansion phase is greater than 180 degrees; and that a crankshaft rotational angle range of an exhaust phase is less than 180 degrees. The invention further relates to a method for operating a multi-joint crank drive (10) of an internal combustion engine (1).

Description

technical field [0001] The invention relates to a multi-link crank-and-rod mechanism of an internal combustion engine, the multi-link and crank-and-rod mechanism having a plurality of coupling parts rotatably supported on a crankshaft crankshaft journal and a plurality of rotatably The articulated connecting rods are supported on the connecting rod pins of the eccentric shaft, wherein each coupling part is pivotably connected to the piston connecting rod of the piston of the internal combustion engine and is connected to one of the articulated connecting rods. The invention also relates to a method for operating such a multi-link crank mechanism. Background technique [0002] A multi-link crank mechanism of the aforementioned type is, for example, a component of an internal combustion engine, but can also be used in other ways. The multi-link crank mechanism includes an eccentric shaft, the angle of rotation of which can preferably be adjusted by means of an adjusting devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B75/04
CPCF02B75/045F02B41/04F02B75/048
Inventor M·布伦德尔M·迈耶
Owner AUDI AG
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