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Internal combustion engine having a multi-joint crank drive and additional masses on articulated connecting rods of the multi-joint crank drive for damping free mass forces

A technology of articulated connecting rod and crank transmission, which is applied in the direction of inertial force compensation, engine control, machine/engine, etc., can solve the problem of enlargement, and achieve the effect of improving structural space and weight increase

Inactive Publication Date: 2013-03-13
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this measure cannot be transferred without problems to an internal combustion engine with a multi-joint crank drive, since the inertial forces generated there on the one hand do not extend purely vibrating but rotationally, and on the other hand the friction of the multi-joint crank drive The losses themselves are already higher than the friction losses of conventional internal combustion engines and can be increased to unacceptable levels by the additional friction losses of the two balance shafts

Method used

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  • Internal combustion engine having a multi-joint crank drive and additional masses on articulated connecting rods of the multi-joint crank drive for damping free mass forces
  • Internal combustion engine having a multi-joint crank drive and additional masses on articulated connecting rods of the multi-joint crank drive for damping free mass forces
  • Internal combustion engine having a multi-joint crank drive and additional masses on articulated connecting rods of the multi-joint crank drive for damping free mass forces

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Embodiment Construction

[0026] Such as figure 1 with figure 2 as well as Figure 4 with Figure 5 As most clearly shown in , the four-stroke 4-cylinder internal combustion engine 1 , which is only partly shown in the drawings, comprises a crankshaft 2 and four pistons 3 in a series arrangement, only the four pistons 3 being shown respectively in the drawings. One of the pistons. Piston 3 can reciprocate in a cylinder (not shown) of internal combustion engine 1 and is connected to crankshaft 2 via piston connecting rod 4 . The crankshaft 2 is mounted rotatably about an axis of rotation 5 in a cylinder crankcase (not shown) of the internal combustion engine 1 .

[0027] The internal combustion engine 1 also includes an eccentric shaft 6 with an axis of rotation 7 parallel to the axis of rotation 5 of the crankshaft 2 , which is rotatably mounted in the cylinder crankcase next to and approximately below the crankshaft 2 and passes through The multi-hinge crank transmission mechanism 8 is coupled w...

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Abstract

The invention relates to an internal combustion engine (1) having a multi-joint crank drive (8), wherein the multi-joint crank drive (8) comprises a plurality of coupling members (9) rotatably mounted on a crankshaft (2) and a plurality of articulated connecting rods (14) rotatably mounted on an eccentric shaft (6), wherein each of the coupling members (9) is pivotably connected to a piston connecting rod (4) of a piston (3) of the internal combustion engine (1) and to one of the articulated connecting rods (14).; In order that the second-order mass forces can be better compensated without a considerable increase in the friction losses, the required packaging space, the weight of the multi-joint crank drive (8), or the bearing forces in the bearings of the crankshaft (2), the articulated connecting rods (14) are provided with additional masses (21) and have a center of mass that lies outside the longitudinal center plates (22) of the articulated connecting rods.

Description

technical field [0001] The invention relates to an internal combustion engine according to the preamble of claim 1 . Background technique [0002] Internal combustion engines of this type are already known, for example, from DE-A-102005054761, DE-A-102005054760, EP-A-1126144, JP-A-2004124775 or WO-A-2007057149 and are generally referred to as having variable compression ratio or indeterminate Compression ratio internal combustion engine, because the compression ratio can be changed by twisting the eccentric shaft. [0003] In such an internal combustion engine, the multi-joint crank drive comprises, in addition to the eccentric shaft, a number corresponding to the number of cylinders, each of which is mounted rotatably on a reciprocating journal of the crankshaft and has two The opposite sides protrude beyond the arms of the crankshaft, each end of which is provided with an arm of a pivot joint. One of the pivot joints is used to articulate the piston connecting rod, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B75/04F16F15/28F16F15/26
CPCF16F15/283F16F15/262F16F15/28F02B75/048F02D15/02F16C3/06
Inventor M·布伦德尔
Owner AUDI AG
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