Talk:Torque converter

This page is not a forum for general discussion about torque converters or manual vs. automatic transmissions. Any such comments may be removed or refactored. Please limit discussion to improvement of this article. You may wish to ask factual questions about torque converters or manual vs. automatic transmissions at the Reference desk.

Automobiles High‑importance

	Cars portal This article is within the scope of WikiProject Automobiles, a collaborative effort to improve the coverage of automobiles on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.AutomobilesWikipedia:WikiProject AutomobilesTemplate:WikiProject AutomobilesAutomobile articles
High	This article has been rated as High-importance on the project's importance scale.

Trucks High‑importance

	This article is within the scope of WikiProject Trucks, a collaborative effort to improve the coverage of trucks on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.TrucksWikipedia:WikiProject TrucksTemplate:WikiProject TrucksTrucks articles
High	This article has been rated as High-importance on the importance scale.

Buses High‑importance

	Buses portal This article is within the scope of WikiProject Buses, a collaborative effort to improve the coverage of buses on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.BusesWikipedia:WikiProject BusesTemplate:WikiProject Busesbus transport articles
High	This article has been rated as High-importance on the project's importance scale.

Technology

This article is within the scope of WikiProject Technology, a collaborative effort to improve the coverage of technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.TechnologyWikipedia:WikiProject TechnologyTemplate:WikiProject TechnologyTechnology articles

Archives of past discussion[edit]

Archive 1

Lockup[edit]

Wdl1961, this edit appears to have been an error on your part. Torque converter lockup — when the lockup clutch is applied, not when it is released — occurs under the stated conditions of steady-speed cruise without substantial torque multiplication. If your edit was intentional, please provide solid support for your assertion, which appears to contradict every reliable text on the subject. Thanks. —Scheinwerfermann ^T·_C22:06, 29 July 2009 (UTC)[reply]

Manufacturers[edit]

I have created a section on manufacturers. Are the Buick and Chevrolet torque converters made in-house or bought from outside manufacturers? Biscuittin (talk) 12:35, 1 November 2009 (UTC)[reply]

Images / Maps[edit]

I have not read through the actual version of the article, but skimmed over the last discussion archive and looked in the commons category.

I would appreciate some color coded / iso-line maps, where the x and y axis are input and output RPM respectively and the color denotes the efficiency. It is important that negative RPMs are included. In further maps input torque, output torque, torque multiplication could be plotted.

I think such a map would allow people who use torque converters to do so efficiently and the world would be a better place. Also the text about torque converters seem to be a problem and images are even more important therfore. -- Arnero (talk) 13:03, 29 November 2009 (UTC)[reply]

obviously wrong; <mat h>r\,N^2D^5</math>, see fluid coupling also[edit]

"As with a basic fluid coupling the theoretical torque capacity of a converter is proportional to $r\,N^{2}D^{5}$ , where $r$ is sity of the fluid, $N$ is the impeller speed (rpm), and $D$ is the diameter."

obviously wrong $r\,N^{2}D^{5}$ , $r\,N^{5}D^{2}$ is correct see fluid coupling also .try basic eng handbooks.Wdl1961 (talk) 00:21, 9 February 2010 (UTC)[reply]

No. Not "obviously wrong" and the WP:RS handbook ref I've just added agreed with ω^2 D^5, as it read before, and as I understand it to be. If you can show that it's "obviously wrong", then please do so. If you have a reliable ref that supports your claim, then please do so. Andy Dingley (talk) 00:40, 9 February 2010 (UTC)[reply]

I've just checked (and fixed) Fluid coupling to N^2D^5. That only claimed N^5D^2 (incorrectly) because you changed it last January. Please stop introducing errors into Wikipedia like this. You have a track record for this sort of error, incorrect and unsupported by references. Please stop. Andy Dingley (talk) 00:46, 9 February 2010 (UTC)[reply]

see Revision as of 06:36, 24 December 2006 (edit) (undo)Bigdumbdinosaur .also p=kv^2.//pump.turbine.flow = kv^2.kv^2.v=kv^5.Wdl1961 (talk) 01:21, 9 February 2010 (UTC)[reply]

No matter what the article may or may not have claimed, you can't use it as a WP:RS for itself! Cite a _real_ reference. Andy Dingley (talk) 01:32, 9 February 2010 (UTC)[reply]

Bernoulli's equation:

q\,=\,{\tfrac {1}{2}}\,\rho \,v^{2}

is dynamic pressure,the reverse applies to a turbine .fluid flow gives the final v^5 = kn^5.Wdl1961 (talk) 16:05, 10 February 2010 (UTC)[reply]

Similarities to a Continous Transmission[edit]

So does a torque converter act like a continuous transmission? It seems so seeing as it changes the RPMs and torque to other RPMs and torque. —Preceding unsigned comment added by 66.21.83.34 (talk) 14:34, 11 April 2011 (UTC)[reply]

Not quite. A torque converter has its own behaviour that varies mechanical advantage in response to conditions like power, angular velocity and load, while a continuous transmission varies mechanical advantage according to a control setting. If a continuous transmission is part of a larger (sub)system that adjusts that control setting the same way in response to conditions like power and load, then that larger (sub)system acts like a torque converter - but that trick doesn't work the other way around, to choose the mechanical advantage of a torque converter the way you can with a continuous transmission. PMLawrence (talk) 16:47, 23 April 2011 (UTC)[reply]

Yes, a torque converter is exactly like a CVT. The name "torque converter" is historical: it is generally applied to fluid couplings that can offer torque multiplication, as a contrast to the early fluid couplings that couldn't do this, and were known as fluid flywheels. Both of these can math varying speeds for input & output, but the simple fluid flywheel does this by slipping (obviously wasteful of power), Föttinger's hydraulic 'torque converter' could do this and also (by multiplying torque) also match power at different speeds, thus avoiding this wasteful slippage.

A "coned pulley" CVT does the same. Power is conserved (with a small waste owing to friction) even when the speeds differ, because there is torque multiplication. Andy Dingley (talk) 19:30, 23 April 2011 (UTC)[reply]

Constantinesco torque converter[edit]

Shouldn't there be a section on this, or perhaps a distinct article if it's too disparate to belong with the main material? At present Constantinesco torque converter just redirects to the car that used it, without giving any detail on the device itself. PMLawrence (talk) 16:38, 23 April 2011 (UTC)[reply]

I think there should be a separate article, not a section. "Torque converter" means (to all practical purposes) a fluid coupling that offers torque multiplication (i.e. the very commonly known Föttinger type) rather than any general principle applied to a range of devices.

Constantinesco torque converter is a redirect because so far I've lacked the time to write anything more. I've scanned a fair bit on it at Commons, but it's a highly obscure device and few people have even heard of it. I don't understand your edit summary of "not a continuously variable transmission but a true torque converter" for AFAIK it was a CVT (albeit of limited range) and I don't knwo what makes one torque multiplying device a "true" torque converter whilst another is presumably a "false" torque converter. Andy Dingley (talk) 19:35, 23 April 2011 (UTC)[reply]

External links modified[edit]

Hello fellow Wikipedians,

I have just modified one external link on Torque converter. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

Added archive https://web.archive.org/web/20100302142045/http://www.intertrains.co.uk/glossary/m/mekydro-transmission.html to http://www.intertrains.co.uk/glossary/m/mekydro-transmission.html

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 18 January 2022).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 22:28, 4 September 2017 (UTC)[reply]

Introduction[edit]

The introduction to this article is a mess and appears to have been edited by someone whose command of technical English is limited. — Preceding unsigned comment added by 38.69.12.5 (talk) 08:53, 10 January 2018 (UTC)[reply]

Pasts[edit]

So no one knows who invented this thing that allowed the 20th century to work? No inventor, group of designers, or patent holders? L3X1 ◊distænt write◊ 20:09, 1 March 2018 (UTC)[reply]