CN112324565B - Connecting rod for an internal combustion engine with variable compression ratio - Google Patents
Connecting rod for an internal combustion engine with variable compression ratio Download PDFInfo
- Publication number
- CN112324565B CN112324565B CN202010759777.1A CN202010759777A CN112324565B CN 112324565 B CN112324565 B CN 112324565B CN 202010759777 A CN202010759777 A CN 202010759777A CN 112324565 B CN112324565 B CN 112324565B
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- Prior art keywords
- connecting rod
- screen
- bearing bore
- big end
- end bearing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/06—Adjustable connecting-rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/22—Internal combustion engines
Abstract
The invention relates to a connecting rod for an internal combustion engine with a variable compression ratio, having a connecting rod body and a connecting rod cover, both of which are designed for connecting the connecting rod to a large connecting rod bearing bore of a crankshaft of the internal combustion engine, having a switching valve and having a control device for setting the effective connecting rod length, comprising at least one hydraulic chamber with an inlet for conducting hydraulic fluid into the hydraulic chamber and an outlet for conducting hydraulic fluid out of the hydraulic chamber, which can be connected directly or via the switching valve to a supply line which branches off from a recess of the large connecting rod bearing bore, and having at least one screen arranged between a bushing arranged in the large connecting rod bearing bore and the large connecting rod bearing bore. According to the invention, the screen element comprises a screening surface with a screening hole and a frame forming an annular channel between the bushing and the groove of the connecting rod.
Description
Technical Field
The invention relates to a connecting rod for an internal combustion engine with a variable compression ratio, having an adjusting device for adjusting the effective connecting rod length.
Background
In internal combustion engines, a high compression ratio has a positive effect on the efficiency of the internal combustion engine. The compression ratio is generally defined as the ratio of the total cylinder volume before compression to the remaining cylinder volume after compression. However, in internal combustion engines with ignition by external sources, in particular in gasoline engines with a fixed compression ratio, only such high compression ratios can be selected that so-called "knocking" of the internal combustion engine is avoided in full-load operation. For the part-load range of the internal combustion engine which occurs more frequently, i.e. with a smaller cylinder filling, the compression ratio can however be selected to a higher value and no "knocking" occurs. When the compression ratio can be variably adjusted, an important partial load range of the internal combustion engine can be improved. For adjusting the compression ratio, systems with variable link length are known, for example.
Despite the known filtering measures, the hydraulic fluid located in the internal combustion engine is still contaminated with dirt particles. The dirt particles can impair the function of the hydraulic components of the connecting rod.
DE102015103205a1 describes a connecting rod in which a filter element prevents dirt from passing through the hydraulic oil from the crankshaft into the hydraulic chamber. For this purpose, for example, a filter element is integrated into the hydraulic line of the connecting rod or into the hydraulic chamber.
According to the same DE102017107702a1, the bearing element is arranged in the region of the bushing.
Disclosure of Invention
The object of the invention is to provide a connecting rod with a switching valve which has a high level of operational capability with respect to dirt penetration. Another object is to provide a suitable assembly method.
A connecting rod for an internal combustion engine with a variable compression ratio according to the invention has a connecting rod body and a connecting rod cover, wherein the connecting rod body and the connecting rod cover are configured for connecting the connecting rod to a connecting rod big end bearing bore of a crankshaft of the internal combustion engine. The connecting rod also has a switching valve and a control device for controlling the effective connecting rod length, wherein the control device comprises at least one hydraulic chamber with an inlet for introducing hydraulic fluid into the hydraulic chamber and an outlet for discharging hydraulic fluid out of the hydraulic chamber.
The hydraulic chamber may be connected to a supply line, which is branched from a groove of the connecting rod big end bearing hole, directly or through the switching valve, and at least one screen member is disposed between a sleeve disposed in the connecting rod big end bearing hole and the connecting rod big end bearing hole.
According to the invention, the screen element comprises a screening surface with a screening hole and a frame forming an annular channel between the bushing and the groove of the connecting rod.
The screen prevents or minimizes the entry of dirt into the connecting rod, so that the hydraulic function of the sensitive connecting rod geometry can be ensured. In particular, in this case, the frame forms or allows the formation of an annular channel between a bushing fitted in the bearing hole of the big end of the connecting rod and the groove of the connecting rod, more precisely between the bushing and the screening surface. In addition to the filter function, the hydraulic annular channel allows an improved oil supply or an improved throughflow, since the hydraulic fluid can be distributed over the entire screening surface and thereby a complete blockage of the screen element can be virtually ruled out.
According to an advantageous development of the invention, the frame is configured to completely surround the screening surface, and the groove has a projection for abutting against the frame. The annular channel may be sealed by the frame, as a bypass of hydraulic fluid around the screen may be eliminated. The frame also acts in a supporting manner, so that the forces of the connecting rod exerted by the bushing can be absorbed.
Preferably, the screen is made in one piece from a flat strip of material. According to a preferred embodiment of the invention, the frame and the screen openings are here manufactured by means of an etching process. This allows for a simple and low cost manufacturing of the sieve element.
Another low-cost alternative embodiment of the invention provides that the screen surface is formed by a textile screen, wherein the frame is formed by a metal frame of the textile screen.
In order to reliably prevent the screen from falling out during the transport of the connecting rod without a bushing, according to an advantageous development, a securing means can be provided, by means of which the screen can be secured in a recess of the bearing bore of the big end of the connecting rod for the transport of the connecting rod.
The adjusting device can preferably be designed as an eccentric adjusting device, wherein the eccentric adjusting device has an eccentric which interacts with an eccentric lever and is connected in a rotationally fixed manner, and two hydraulic cylinders as hydraulic chambers, each having a piston, which is guided displaceably in the hydraulic cylinders and is connected to a support rod, which is connected at the other end to the eccentric lever.
The invention further relates to a method for assembling a connecting rod for an internal combustion engine having a variable compression ratio.
The foregoing description of the solution according to the invention thus includes, inter alia, the various combinations of features defined by the following consecutively numbered embodiments:
1. a connecting rod (1) for an internal combustion engine with a variable compression ratio,
the connecting rod is provided with a connecting rod body (2) and a connecting rod cover (3),
wherein the connecting rod body (2) and the connecting rod cover (3) form a connecting rod big end bearing hole (4) for connecting the connecting rod (1) to a crankshaft of an internal combustion engine,
the connecting rod (1) further comprises a switching valve (12) and a control device (5) for controlling the effective connecting rod length,
wherein the regulating device (5) comprises at least one hydraulic chamber having an inlet for leading hydraulic fluid into the hydraulic chamber and an outlet for leading hydraulic fluid out of the hydraulic chamber,
wherein the hydraulic chamber can be connected to a supply line (15) either directly or via the switching valve (12),
wherein the supply line (15) branches off from a groove (16) of the connecting rod big end bearing bore (4) and at least one screen (17) is arranged between a bushing arranged in the connecting rod big end bearing bore (4) and the connecting rod big end bearing bore (4), wherein the screen (17) comprises a screening surface (18) with screening holes (20) and a frame (19), which frame (19) forms an annular channel (22) between the bushing and the groove (16) of the connecting rod (1).
2. Connecting rod (1) according to embodiment 1, wherein the frame (19) is configured to completely enclose the screening surface (18) and the groove (16) has a projection (21) for abutting against the frame (19).
3. The connecting rod (1) according to embodiment 2, wherein the screen (17) is made in one piece from a flat strip-shaped material.
4. The connecting rod (1) according to embodiment 3, wherein the frame (19) and the screen mesh (20) are manufactured by an etching method.
5. The connecting rod (1) according to embodiment 2, wherein the screening surface (18) consists of a fabric screen and the frame (19) is formed by a metal border of the fabric screen.
6. Connecting rod (1) according to one of the preceding embodiments, wherein fixing means are provided, by means of which the sieve (17) can be fixed in a groove of the connecting rod big end bearing bore (4) for transporting the connecting rod (1).
7. Connecting rod (1) according to one of the preceding embodiments, wherein the adjusting device (5) is configured as an eccentric adjusting device,
wherein the eccentric adjustment device has an eccentric (25) which interacts with an eccentric lever (24) and is connected in a rotationally fixed manner, and has two hydraulic cylinders (6, 7) as hydraulic chambers, each having a piston (8, 9), wherein the pistons (8, 9) are guided in the hydraulic cylinders (6, 7) in a displaceable manner and are connected to support rods (10, 11), wherein the support rods (10, 11) are connected at the other end to the eccentric lever (24).
8. The assembly method for a connecting rod (1) according to one of the preceding embodiments 1 to 7, wherein the screen (17) is configured flat before assembly and is bent by being fitted into the groove (16) of the connecting rod big-end bearing bore (4).
9. Assembly method for a connecting rod (1) according to one of the preceding embodiments 1 to 7, wherein the screen (17) is manufactured flat and bent before being fitted into the groove of the connecting rod big end bearing bore.
10. The assembly method according to one of the preceding embodiments 8 to 9, wherein the screen element (17) is fixed in a form-fitting and/or material-fitting manner in the recess (16) of the connecting rod big end bearing bore (4) for reliable transport.
Drawings
Other advantages will be derived from the following description of the figures. Embodiments of the invention are schematically illustrated in the drawings. The figures, description and embodiments contain a number of combinations of features. Those skilled in the art can also appropriately consider these features alone and conclude other combinations of significance.
The figures are exemplary:
FIG. 1 shows a partial cross-sectional view of a known connecting rod with a changeover valve;
FIG. 2 shows a portion of a first embodiment of a connecting rod in accordance with the present invention;
fig. 3 shows a part of the connecting rod according to fig. 4 in a sectional view;
fig. 4 shows a perspective view of a sectional view according to fig. 3;
figure 5 shows a sifter of the connecting rod according to figures 2 to 4;
FIG. 6 shows a screen according to FIG. 5 in a top view;
figure 7 shows the screen according to figures 5 and 6 in longitudinal section B-B;
FIG. 8 shows a portion of a second embodiment of a connecting rod in accordance with the present invention;
FIG. 9 shows a portion of a sifter of the connecting rod according to FIG. 8;
fig. 10 shows a part of the connecting rod according to fig. 8 in a sectional view;
FIG. 11 shows a third embodiment of a screen in perspective view;
FIG. 12 shows a portion of the sifter according to FIG. 11;
fig. 13 shows another part of the screen according to fig. 11 and 12, an
Figure 14 shows a part of a third embodiment of a connecting rod according to the invention.
Detailed Description
In the drawings, the same or similar components are denoted by the same reference numerals. The drawings are only for purposes of illustration and are not to be construed as limiting.
Fig. 1 shows an exemplary known connecting rod 1 for an internal combustion engine with a variable compression ratio. The connecting rod 1 has an eccentric adjusting device 5 for adjusting the effective connecting rod length and a switching valve 12. The application of the invention is not, however, limited to the specific embodiment of the connecting rod 1.
The connecting rod 1 has a connecting rod body 2 and a connecting rod cap 3, wherein the connecting rod body and the connecting rod cap form a connecting rod big end bearing hole 4 for connecting the connecting rod 1 to a crankshaft of the internal combustion engine. The adjusting device designed as an eccentric adjusting device 5 has an eccentric 25 which interacts with an eccentric lever 24 and is connected in a rotationally fixed manner, and has two hydraulic cylinders 6, 7 as hydraulic chambers, each having a piston 8, 9 which is guided displaceably in the hydraulic cylinders 6, 7 and is connected to a support rod 10, 11 which is connected at the other end to the eccentric lever 24.
The hydraulic cylinders 6, 7 form hydraulic chambers (one chamber on the inertial force side (MKS) and one chamber on the gas force side (GKS)), wherein the hydraulic chambers are each provided with an inlet for introducing hydraulic fluid into the hydraulic chamber and an outlet for discharging hydraulic fluid out of the hydraulic chamber. Each hydraulic chamber may also form an outlet and an inlet via separate hydraulic lines.
The switching valve 12 is provided to control the hydraulic fluid flow of the connecting rod 1 in order to set the effective connecting rod length by means of the eccentric adjustment device 5. In the embodiment shown, which can be actuated mechanically, the switching valve 12 comprises a valve housing 13 and a tap element 14. It is also conceivable to use a hydraulic valve as the switching valve. Likewise, it is not mandatory to arrange the switching valve 12 in the region of the connecting rod cover 3.
Depending on the embodiment of the connecting rod 1, the hydraulic chamber can be connected directly or via the switching valve 12 to a supply line 15, wherein the supply line 15 branches off from a recess 16 of the connecting rod big end bearing bore 4.
Fig. 2 to 14 show an embodiment of the present invention. The invention can be used in the exemplary illustration of a connecting rod 1 according to fig. 1, but is not limited to the embodiment of the connecting rod 1.
In order to minimize the amount of dirt entering the connecting rod 1, at least one sieve 17, which is shown in fig. 2, is arranged between a not shown bushing, which is arranged in the connecting rod big end bearing bore 4, and the connecting rod big end bearing bore 4. According to the invention, the screen 17, which is shown in perspective in fig. 5 for example, comprises a screen surface 18 with screen openings 20 and a frame 19.
In particular, here, between a not shown bushing fitted in the bearing bore 4 of the big end of the connecting rod and the groove 16 of the connecting rod 1, more precisely between said bushing and said screening surface 18, the frame 19 forms or allows the formation of an annular channel 22. In addition to the filter function, the hydraulic annular channel 22 allows an improved oil supply or an improved throughflow, since the hydraulic fluid can be distributed over the entire screening surface 18. Thereby almost eliminating complete blockage of the screen 17.
The screen 17 forms with the groove 16 a further annular channel 23, into which annular channel 23 the hydraulic fluid flows after passing through the screen 17.
As can be gathered in particular from fig. 5 and 6, the frame 19 is configured to completely enclose the screening surface 18. After assembly of the connecting rod 1, the frame 19 rests on the annular projection 21 of the recess 16, so that the frame 19 can form the annular channel 22. At the same time, this annular channel 22 can be sealed by the frame 19 and can exclude the bypass of hydraulic fluid around the screen 17.
The frame 19 also acts in a supporting manner, so that the forces of the connecting rod 1 exerted by the bushing can be absorbed.
According to the first embodiment, the screen 17 is made in one piece from a flat strip-shaped material. The frame 19 and the screen openings 20 are preferably produced here by an etching process, so that the screen 17 is designed as a so-called etching screen. Either the screen 17 can be bent according to the shape of the groove after the erosion process and before assembly or the screen 17 can be bent during assembly into the tie rod 1.
If the switching valve 12 is arranged in the region of the connecting rod body 2, it is conceivable for the sieve 17 likewise to be arranged in a recess of the connecting rod body 2.
For reliable transport, the screen 17 can be fixed in the recess 16 of the connecting rod big end bearing bore 4 with a form fit and/or a material fit. For example, it is conceivable to insert the screen 17 into the groove in a tensioned manner. Likewise conceivable are, for example, form-fitting fastening elements which enable the screen filter 17 to be clamped into the connecting rod 1. Furthermore, the screen 17 can be secured in a material-to-material manner, for example by means of a weld.
In contrast to the first exemplary embodiment, the alternative exemplary embodiment according to fig. 8 to 10 has a screen 17, the screen surface of which is formed by a textile screen. In this case, the frame 19 is formed by a metal frame of the fabric screen, which surrounds the fabric screen on both sides. In order to enlarge the annular channel 22 formed by the frame 19, it is conceivable to insert a further sheet material between the textile screen and the frame on the side of the frame 19 facing the bushing.
According to the second embodiment, it is likewise possible either to bend the sifter 17 according to the shape of the groove before assembly after the production process or to bend the sifter 17 during assembly into the connecting rod 1. The measures mentioned above for reliable transport are likewise conceivable.
A third embodiment is derived from fig. 11 to 14.
As described in fig. 8 to 10, the screen 17 is likewise designed as a textile screen with a metal frame. In contrast to the previous exemplary embodiment, provision is made for the textile screen to be additionally bent in order to enlarge the annular channel 22.
Claims (9)
1. A connecting rod (1) for an internal combustion engine with a variable compression ratio,
the connecting rod is provided with a connecting rod body (2) and a connecting rod cover (3),
wherein the connecting rod body (2) and the connecting rod cover (3) form a connecting rod big end bearing hole (4) for connecting the connecting rod (1) to a crankshaft of an internal combustion engine,
the connecting rod (1) further comprises a switching valve (12) and a control device (5) for controlling the effective connecting rod length,
wherein the regulating device (5) comprises at least one hydraulic chamber having an inlet for leading hydraulic fluid into the hydraulic chamber and an outlet for leading hydraulic fluid out of the hydraulic chamber,
wherein the hydraulic chamber can be connected to a supply line (15) directly or via the switching valve (12),
wherein the supply line (15) branches off from a groove (16) of the connecting rod big end bearing bore (4) and at least one sieve (17) is arranged between a bushing arranged in the connecting rod big end bearing bore (4) and the connecting rod big end bearing bore (4), characterized in that the sieve (17) comprises a sieve surface (18) with sieve holes (20) and a frame (19), which frame (19) forms an annular channel (22) between the bushing and the groove (16) of the connecting rod (1), wherein the frame (19) is configured to completely enclose the sieve surface (18) and the groove (16) has a projection (21) for abutting against the frame (19).
2. Connecting rod (1) according to claim 1, characterized in that the sieve (17) is made in one piece from a flat band-shaped material.
3. Connecting rod (1) according to claim 2, characterized in that the frame (19) and the screen mesh (20) are manufactured by means of an etching method.
4. Connecting rod (1) according to claim 1, characterized in that the screening surface (18) consists of a fabric screen and the frame (19) is formed by a metal rim of the fabric screen.
5. A connecting rod (1) according to any one of claims 1-4, characterized in that there are provided fixing means by means of which the sifter (17) can be fixed in a groove of the connecting rod big end bearing bore (4) for transporting the connecting rod (1).
6. A connecting rod (1) according to one of claims 1 to 4, characterized in that the adjusting device (5) is configured as an eccentric adjusting device,
wherein the eccentric adjustment device has an eccentric (25) which interacts with an eccentric lever (24) and is connected in a rotationally fixed manner, and has two hydraulic cylinders (6, 7) as hydraulic chambers, each having a piston (8, 9), wherein the pistons (8, 9) are guided in the hydraulic cylinders (6, 7) in a displaceable manner and are connected to support rods (10, 11), wherein the support rods (10, 11) are connected at the other end to the eccentric lever (24).
7. Assembly method for a connecting rod (1) according to any one of claims 1 to 6, characterised in that the screen (17) is flat constructed before assembly and is bent by fitting into a groove (16) of the connecting rod big end bearing bore (4).
8. Assembly method for a connecting rod (1) according to any one of claims 1 to 6, characterised in that the screen (17) is manufactured flat and bent before fitting into the groove of the connecting rod big end bearing bore.
9. Assembly method according to claim 7 or 8, characterized in that the screen element (17) is fixed in the groove (16) of the connecting rod big end bearing bore (4) with a form-fit and/or material-fit for reliable transport.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019121107.7 | 2019-08-05 | ||
| DE102019121107.7A DE102019121107A1 (en) | 2019-08-05 | 2019-08-05 | Connecting rod for an internal combustion engine with variable compression |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112324565A CN112324565A (en) | 2021-02-05 |
| CN112324565B true CN112324565B (en) | 2022-09-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010759777.1A Active CN112324565B (en) | 2019-08-05 | 2020-07-31 | Connecting rod for an internal combustion engine with variable compression ratio |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112324565B (en) |
| DE (1) | DE102019121107A1 (en) |
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| DE10151508A1 (en) * | 2000-10-18 | 2002-07-25 | Ford Global Tech Dearborn | Hydraulic control system, to vary the piston rod lengths in an IC motor and adjust the compression ratios during running, uses the motor oil as the hydraulic fluid to lock and unlock the piston sections |
| DE10151518A1 (en) * | 2000-10-18 | 2002-08-01 | Ford Global Tech Dearborn | Locking mechanism I for a connecting rod with a variable compression ratio |
| CN104797797A (en) * | 2012-07-30 | 2015-07-22 | Fev有限责任公司 | Hydraulic freewheel for an internal combustion engine with variable compression ratio |
| DE102016117875A1 (en) * | 2016-03-16 | 2017-09-21 | Hilite Germany Gmbh | Connecting rod for an internal combustion engine with variable compression with an eccentric adjustment |
| DE102016120975A1 (en) * | 2016-11-03 | 2018-05-03 | Avl List Gmbh | Length adjustable connecting rod with a cylinder-piston unit with oil filter |
| CN108119234A (en) * | 2016-11-29 | 2018-06-05 | 丰田自动车株式会社 | Variable compression ratio internal combustion engine |
| EP3450720A2 (en) * | 2017-09-04 | 2019-03-06 | ECO Holding 1 GmbH | Switching valve for controlling a hydraulic fluid stream and connecting rod for a combustion engine with variable compression with a switching valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2015152108A (en) * | 2014-02-15 | 2015-08-24 | 株式会社デンソー | spool valve |
| DE102015103205B4 (en) * | 2015-03-05 | 2021-02-04 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Connecting rod with a filter element for hydraulic oil and an internal combustion engine with such a connecting rod |
| DE102017107702A1 (en) * | 2016-10-04 | 2018-04-05 | ECO Holding 1 GmbH | Changeover valve and connecting rod for a variable compression internal combustion engine |
| DE102017111225A1 (en) * | 2017-05-23 | 2018-05-30 | Schaeffler Technologies AG & Co. KG | Hydraulic support element for a drag lever in a valve train of an internal combustion engine |
| DE102017112574B3 (en) * | 2017-06-08 | 2018-07-26 | Schaeffler Technologies AG & Co. KG | Hydraulic support element with a ring filter |
| DE102017115097A1 (en) * | 2017-07-06 | 2019-01-10 | Schaeffler Technologies AG & Co. KG | Hydraulic support element |
| DE102018105247A1 (en) * | 2017-10-04 | 2019-04-04 | ECO Holding 1 GmbH | Filter element for a connecting rod and connecting rod for a variable compression internal combustion engine |
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2019
- 2019-08-05 DE DE102019121107.7A patent/DE102019121107A1/en active Pending
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2020
- 2020-07-31 CN CN202010759777.1A patent/CN112324565B/en active Active
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| DE10151508A1 (en) * | 2000-10-18 | 2002-07-25 | Ford Global Tech Dearborn | Hydraulic control system, to vary the piston rod lengths in an IC motor and adjust the compression ratios during running, uses the motor oil as the hydraulic fluid to lock and unlock the piston sections |
| DE10151518A1 (en) * | 2000-10-18 | 2002-08-01 | Ford Global Tech Dearborn | Locking mechanism I for a connecting rod with a variable compression ratio |
| CN104797797A (en) * | 2012-07-30 | 2015-07-22 | Fev有限责任公司 | Hydraulic freewheel for an internal combustion engine with variable compression ratio |
| DE102016117875A1 (en) * | 2016-03-16 | 2017-09-21 | Hilite Germany Gmbh | Connecting rod for an internal combustion engine with variable compression with an eccentric adjustment |
| DE102016120975A1 (en) * | 2016-11-03 | 2018-05-03 | Avl List Gmbh | Length adjustable connecting rod with a cylinder-piston unit with oil filter |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102019121107A1 (en) | 2021-02-11 |
| CN112324565A (en) | 2021-02-05 |
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