Longitudinally adjustable connecting rod

A length-adjustable and adjustable technology, applied in the directions of connecting rods, shafts, multi-way valves, etc., can solve the problem of not being able to obtain connecting rods, and achieve the effect of improving service life

Active Publication Date: 2018-05-11
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

Method used

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  • Longitudinally adjustable connecting rod
  • Longitudinally adjustable connecting rod
  • Longitudinally adjustable connecting rod

Examples

Experimental program
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Effect test

Embodiment Construction

[0126] Elements with the same function are provided with the same reference signs in the embodiment variants shown in the figures.

[0127] figure 1 A two-piece connecting rod 1 for a piston engine such as an internal combustion engine is shown, with a small connecting rod 2 for a piston pin bearing not shown further, and a large crankpin bearing for an internal combustion engine not shown further The connecting rod 3. The axis of rotational symmetry of the small or large connecting rods 2, 3 is denoted by 2a or 3a. The longitudinal axis of the connecting rod 1 is denoted by 1a, and the longitudinal center plane of the connecting rod 1 that is normal on the rotational symmetry axes 2a and 3a of the small and large connecting rods 2, 3 and contains the longitudinal axis 1a of the connecting rod 1 ( The swing plane) is represented by ε.

[0128] The connecting rod 1 has an upper first rod 4 with a small connecting rod 2 and a lower second rod 5 with a large connecting rod 3. The f...

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PUM

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Abstract

A longitudinally adjustable connecting rod (1) comprises a first rod part (4) and a second rod part (5), wherein the rod parts (4, 5) are movable telescopically relative to and/or into each other by means of a longitudinal adjustment mechanism (60), and said longitudinal adjustment mechanism (60) can be supplied with a hydraulic medium by means of a hydraulic conduit (11, 12). Said hydraulic conduit (11, 12) can be fluidically connected to a hydraulic medium supply conduit (13) by means of a control device (16). Said control device (16) has a first and a second valve (17; 22) with respective valve chambers (18; 23) and with one valve body (20, 25) each that can be forced against a valve seat (21; 26) by a restoring force. The valve chamber (18) of the first valve (17) is fluidically connected to a first hydraulic conduit (11) and the second valve chamber (23) of the second valve (22) to a second hydraulic conduit (12). The valve bodies (20; 25) can be operatively connected to each other by means of a connecting device (27) that can be moved between a first position and a second position. In the first position, the first valve body (20) and in the second position, the second valve body (25) can be lifted from the associated valve seat (21; 26) counter to the restoring force, and the first or second valve chamber (18; 23) can be fluidically connected to the hydraulic medium supply conduit (13). In the respective other position of the connecting device (27), the first valve body (20) rests on the first valve seat (21) or the second valve body (25) on the second valve seat (26), and blocks the fluid connection to the hydraulic medium supply conduit (13).

Description

Technical field [0001] The present invention relates to a connecting rod with an adjustable length for a piston engine (Hubkolbenmaschine), which has at least one 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 length adjustment device can be supplied with hydraulic medium via at least one hydraulic channel, and the at least one hydraulic channel can be in fluid communication with the 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 changing the compression of the internal combustion engine, the full load can be operated at a lower compression ratio, and the partial load and start can be operated at an increased ratio. Here, the consumption is improved in the partial load range, t...

Claims

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Application Information

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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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