Multi-joint crank drive of an internal combustion engine and corresponding internal combustion engine

A technology of crank transmission and internal combustion engine, which is applied in the direction of machine/engine, engine control, engine components, etc., which can solve problems such as large distances and achieve the effect of reducing friction

Active Publication Date: 2016-07-06
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The forces in the swivel bearings of such multi-link crank drives are relatively high and must cover large swivel angles and thus correspondingly long distances

Method used

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  • Multi-joint crank drive of an internal combustion engine and corresponding internal combustion engine

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Embodiment Construction

[0033] The figure shows a detail of an internal combustion engine 1 with a multi-link crank drive 2 . Internal combustion engine 1 also has at least one piston 4 arranged longitudinally movable in cylinder 3 . Cylinder 3 and piston 4 have a longitudinal center axis 5 . A piston connecting rod 6 is connected to the piston 4 , on which the piston connecting rod is mounted rotatably about a piston axis of rotation 7 . The piston axis of rotation 7 preferably lies here on the longitudinal center axis 5 of the cylinder 3 .

[0034] The piston rod 6 is connected on its side facing away from the piston 4 to a coupling part 8 . In this case, the piston rod 6 is mounted on the coupling part 8 so as to be rotatable about the piston rod axis of rotation 9 . The piston rod 6 is connected in particular to the first arm 10 of the coupling part 8 . The first arm and the second arm 11 are rigidly connected to each other and form an angle α. The angle α exists here about the coupling axis...

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Abstract

The invention relates to a multi-joint crank drive (2) of an internal combustion engine (1) comprising at least one coupling element (8) mounted rotatably about a coupling element rotational axis (12), on a lifting pin (13) of a crankshaft (14), and at least one articulated connecting rod (16) rotatably mounted around an eccentric rotational axis (18) on a lifting pin (19) of an eccentric shaft (20), wherein the coupling element (8) is pivotably connected around a piston connecting rod rotational axis (9) to a piston connecting rod (6) of a piston (4) of the internal combustion engine (1) and is pivotably connected around an articulated connecting rod rotational axis (17) to the articulated connecting rod (16), and wherein a rotational axis (21) of the eccentric shaft (20) lies above a plane (22) which incorporates a rotational axis (15) of the crank shaft (14) and is perpendicular to at least one longitudinal centre line of a cylinder. It is thereby provided that the distance (l1) between the rotational axis of the piston (7) and the rotational axis of the piston connecting rod (9) is at least 1.41 at most 1.61; and the distance (l2) between the rotational axis of the piston connecting rod (9) and the rotational axis of the coupling element (12) is at least 0.38 and at most 0.58; and the distance (l3) between the rotational axis of the coupling element (12) and the rotational axis of the articulated connecting rod (17) is at least 0.82 and at most 1.02; and the distance (l1) between the rotational axis of the articulated connecting rod (17) and the eccentric rotational axis (18) is at least 1.63 and at most 1.83, relative in each case to a total piston stroke. The invention additionally relates to an internal combustion engine (1) with a multi-joint crank drive (2).

Description

technical field [0001] The invention relates to a multi-link crank drive of an internal combustion engine, comprising at least one coupling element mounted rotatably about an axis of rotation of the coupling element on a connecting rod journal of the crankshaft and at least one coupling element rotatable about an eccentric axis of rotation. The hinged connecting rod supported on the connecting rod journal of the eccentric shaft, the coupling part is connected with the piston connecting rod of the piston of the internal combustion engine in a manner that can swing around the rotation axis of the piston connecting rod and can swing around the rotation axis of the hinged connecting rod. Connected with the articulated connecting rod, the axis of rotation of the eccentric shaft is located above a plane containing the axis of rotation of the crankshaft and perpendicular to the longitudinal central axis of at least one cylinder. The invention also relates to an internal combustion en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B75/04
CPCF02B75/048F02D15/02F16C3/18F16J1/14
Inventor M·布伦德尔M·维尔德
Owner AUDI AG
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