Talk:Continuously variable transmission: Difference between revisions
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New topics will go below this one. Cheers, [[User:1292simon|1292simon]] ([[User talk:1292simon|talk]]) 03:10, 22 August 2020 (UTC) |
New topics will go below this one. Cheers, [[User:1292simon|1292simon]] ([[User talk:1292simon|talk]]) 03:10, 22 August 2020 (UTC) |
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On the section for epicyclic CVT's ( https://en.wikipedia.org/wiki/Continuously_variable_transmission#Epicyclic ) the description refers to friction discs and then indicates the Prius E-CVT as an example. The E-CVT is epicyclic but uses differential input from multiple motors to produce ratio variability. There is not a friction component. |
On the section for epicyclic CVT's ( https://en.wikipedia.org/wiki/Continuously_variable_transmission#Epicyclic ) the description refers to friction discs and then indicates the Prius E-CVT as an example. The E-CVT is epicyclic but uses differential input from multiple motors to produce ratio variability. There is not a friction component. <!-- Template:Unsigned IP --><small class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/67.5.110.26|67.5.110.26]] ([[User talk:67.5.110.26#top|talk]]) 17:57, 21 January 2021 (UTC)</small> <!--Autosigned by SineBot--> |
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== Hydrostatic drives are not just for small "lawn mower" applications == |
== Hydrostatic drives are not just for small "lawn mower" applications == |
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Hydrostatic drives are used on quite large earthmoving equipment , notably large bulldozers. Here is an example of a 770HP drive https://www.mobilehydraulictips.com/fluid-power-drives-mega-dozer/ . The section should be reworded slightly to note that hydrostatic transmissions are very efficient at all power levels. [[User:Salbayeng|Salbayeng]] ([[User talk:Salbayeng|talk]]) 22:34, 1 September 2020 (UTC) |
Hydrostatic drives are used on quite large earthmoving equipment , notably large bulldozers. Here is an example of a 770HP drive https://www.mobilehydraulictips.com/fluid-power-drives-mega-dozer/ . The section should be reworded slightly to note that hydrostatic transmissions are very efficient at all power levels. [[User:Salbayeng|Salbayeng]] ([[User talk:Salbayeng|talk]]) 22:34, 1 September 2020 (UTC) |
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== Can someone tell me why hydraulic systems are wrongly referred to as hydrostatic ? == |
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In a hydrostatic system the fluid does not move, it is static = not move. All hydraulic power transmission systems rely on fluid movement and are therefore hydrodynamic. <!-- Template:Unsigned IP --><small class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/80.225.0.161|80.225.0.161]] ([[User talk:80.225.0.161#top|talk]]) 00:33, 8 March 2021 (UTC)</small> <!--Autosigned by SineBot--> |
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:Oh yeah this is an annoying terminology thing that differentiates between transmissions using [[Pump#Positive-displacement_pumps|positive-displacement_pumps]] and [[Rotodynamic_pump|rotodynamic pumps]], the terminology is ingrained now but I'll add mention of the discrepancy to the section since it does seem a bit dumb otherwise. [[User:MasterTriangle12|MasterTriangle12]] ([[User talk:MasterTriangle12|talk]]) 06:12, 8 March 2021 (UTC) |
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== A Commons file used on this page or its Wikidata item has been nominated for speedy deletion == |
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The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for speedy deletion: |
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* [[commons:File:27954 en 9f807 30714 komatsu-980e-4-haul-truck.jpg|27954 en 9f807 30714 komatsu-980e-4-haul-truck.jpg]]<!-- COMMONSBOT: speedy | 2022-07-01T04:51:27.659120 | 27954 en 9f807 30714 komatsu-980e-4-haul-truck.jpg --> |
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You can see the reason for deletion at the file description page linked above. —[[User:Community Tech bot|Community Tech bot]] ([[User talk:Community Tech bot|talk]]) 04:51, 1 July 2022 (UTC) |
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== Buick Twin and Triple Turbine Dynaflow == |
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Should there be a section on Buick Twin Turbine (53-63) and Triple Turbine (57-59) transmissions ? These transmissions are often referred to as 2 (twin turbine) or 3 (triple turbine) speed automatics, but they were not actually shifting when in Drive, instead having a continuously varied overall reduction ratio resulting from the relative speeds of 2 or 3 turbines in the torque converter, each driving different inputs of an epicyclic geartrain. |
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In particular, the Triple Turbine variant and its close cousin at Chevrolet, the Turboglide, didn't even have a Low gear setting, and could offer reduction from 4.5-4.7:1 up to 1:1 seamlessly without shifting. They were hydraulic CVTs, but not of the "hydrostatic" nature. [[User:Clarrieu|Clarrieu]] ([[User talk:Clarrieu|talk]]) 10:04, 21 December 2023 (UTC) |
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Placeholder section
[edit]New topics will go below this one. Cheers, 1292simon (talk) 03:10, 22 August 2020 (UTC)
On the section for epicyclic CVT's ( https://en.wikipedia.org/wiki/Continuously_variable_transmission#Epicyclic ) the description refers to friction discs and then indicates the Prius E-CVT as an example. The E-CVT is epicyclic but uses differential input from multiple motors to produce ratio variability. There is not a friction component. — Preceding unsigned comment added by 67.5.110.26 (talk) 17:57, 21 January 2021 (UTC)
Hydrostatic drives are not just for small "lawn mower" applications
[edit]Hydrostatic drives are used on quite large earthmoving equipment , notably large bulldozers. Here is an example of a 770HP drive https://www.mobilehydraulictips.com/fluid-power-drives-mega-dozer/ . The section should be reworded slightly to note that hydrostatic transmissions are very efficient at all power levels. Salbayeng (talk) 22:34, 1 September 2020 (UTC)
Can someone tell me why hydraulic systems are wrongly referred to as hydrostatic ?
[edit]In a hydrostatic system the fluid does not move, it is static = not move. All hydraulic power transmission systems rely on fluid movement and are therefore hydrodynamic. — Preceding unsigned comment added by 80.225.0.161 (talk) 00:33, 8 March 2021 (UTC)
- Oh yeah this is an annoying terminology thing that differentiates between transmissions using positive-displacement_pumps and rotodynamic pumps, the terminology is ingrained now but I'll add mention of the discrepancy to the section since it does seem a bit dumb otherwise. MasterTriangle12 (talk) 06:12, 8 March 2021 (UTC)
A Commons file used on this page or its Wikidata item has been nominated for speedy deletion
[edit]The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for speedy deletion:
You can see the reason for deletion at the file description page linked above. —Community Tech bot (talk) 04:51, 1 July 2022 (UTC)
Buick Twin and Triple Turbine Dynaflow
[edit]Should there be a section on Buick Twin Turbine (53-63) and Triple Turbine (57-59) transmissions ? These transmissions are often referred to as 2 (twin turbine) or 3 (triple turbine) speed automatics, but they were not actually shifting when in Drive, instead having a continuously varied overall reduction ratio resulting from the relative speeds of 2 or 3 turbines in the torque converter, each driving different inputs of an epicyclic geartrain.
In particular, the Triple Turbine variant and its close cousin at Chevrolet, the Turboglide, didn't even have a Low gear setting, and could offer reduction from 4.5-4.7:1 up to 1:1 seamlessly without shifting. They were hydraulic CVTs, but not of the "hydrostatic" nature. Clarrieu (talk) 10:04, 21 December 2023 (UTC)