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Adjustable length connecting rod

A length-adjustable and adjustable technology, applied in the directions of connecting rods, machines/engines, mechanical equipment, etc., can solve the problem of not being able to obtain connecting rods, etc., and achieve the effect of improving service life

Active Publication Date: 2020-07-24
AVL LIST GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] No solution is available from the prior art for controlling the adjustable-length connecting rod in a prescribed manner at high rotational speeds, as it occurs in the PKW and high-power areas

Method used

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Examples

Experimental program
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Embodiment Construction

[0126] Functionally identical elements are provided with the same reference symbols in the embodiment variants shown in the figures.

[0127] figure 1 Shown is a two-part connecting rod 1 for a piston engine, such as an internal combustion engine, with a small connecting rod 2 for a piston pin bearing (not further shown) and a large connecting rod 2 for a crankpin bearing (not further shown) for an internal combustion engine. The connecting rod 3. The axis of rotational symmetry of the small or large connecting rod 2 , 3 is indicated with 2 a or 3 a. The longitudinal axis of the connecting rod 1 is denoted by 1a, the longitudinal center plane of the connecting rod 1 normal to the axes of rotational symmetry 2a and 3a of the small and large connecting rods 2, 3 and containing the longitudinal axis 1a of the connecting rod 1 ( Swing plane) is denoted by ε.

[0128] The connecting rod 1 has an upper first rod part 4 with a small connecting rod 2 and a lower second rod part 5 w...

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PUM

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Abstract

A length-adjustable connecting rod has a first rod part and a second rod part, with the rod parts being displaceable telescopically toward and / or in one another by means of a length-adjusting means, and with the length-adjusting means being chargeable via a hydraulic channel with a hydraulic medium. The hydraulic channel is fluidly connectable by means of a control device to a hydraulic medium supply channel. The control device has a first and a second valve, each with a valve chamber and each with a valve body that can be pressed by a restorative force against a valve seat. The valve chamber of the first valve is fluidly connected to a first hydraulic channel, and the second valve chamber of the second valve to a second hydraulic channel. The valve bodies are operatively interconnected via a connecting device that can be displaced between a first position and a second position.

Description

technical field [0001] The invention relates to a length-adjustable connecting rod for a piston engine (Hubkolbenmaschine), which has at least a first rod and a second rod, wherein the two rods can be moved along the connecting rod by means of a length adjustment device. The longitudinal axis direction telescopically extends and / or retracts, wherein the length adjustment device can be supplied with hydraulic medium via at least one hydraulic channel, and wherein the at least one hydraulic channel can be in fluid communication with at least one hydraulic medium supply channel through the control device. Background technique [0002] In order to optimize internal combustion engines with regard to emissions and consumption, more and more variants with variable compression ratios are being tried. By varying the compression of the internal combustion engine it is possible to run full load at a lower compression ratio, part load and start at an increased ratio. Here, the consumpt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B75/04F16C7/06
CPCF02B75/045F16C7/04F16C7/06F16C2360/22F16K11/048F16K11/056F16K11/18F15B13/00
Inventor 赫尔穆特·梅尔德-图曹伊斯蒂芬·利希滕埃格格哈德·海梅尔伯恩哈德·赫德尔
Owner AVL LIST GMBH
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