Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

A Different Application For A Torque Converter

A Different Application For A Torque Converter

A Different Application For A Torque Converter

Could anyone explain (to some degree of detail) why an automatic transmission torque converter could not be used in some capacity as a dynamometer brake.

With the internal stator, impeller and turbine it looks like a possiblity.

If there is a question as to why not simply buy a purpose built unit? The answer, I have all sorts of materials, parts and pieces with the addition of loads of time to do so.

Thanks for anyone's help.

RE: A Different Application For A Torque Converter

How would you control the applied load to the desired level.

I imagine you will have trouble controlling the heat in the fluid, and any variation in heat will vary the load, so it might be difficult to hold a constant load for long enough.

Also water for a waterbrake is VERY CHEAP vs ATF.

pat   pprimmer@acay.com.au
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: A Different Application For A Torque Converter

  Instead of oil I would use water. Cooling the water would be done close to the same as oil. The differences are fluid temp fluctuation and viscosity.
  Controlling a load against the torque of the engine will be done by providing a fluid port entrance at a strategic spot, and a fluid port exit at a location determined by the internal design of the unit, and the variation of it's flow-rate. Because of the dynamics of the test procedure, the flow will be done with a closed-loop servo system.

Thank you for interest.
However, I'm not sure if it could be done.

Anyone else's help would be a great help.

Thanks again

RE: A Different Application For A Torque Converter

If you proceed with this project and use water you might consider water based machining fluid as I think it may provide some lubricity for the moving components inside the torque convertor while simultaneously having higher heat capacity and lower cost.

RE: A Different Application For A Torque Converter

PatPrimmer and Strokersix,

Thanks for your help. I really appreciate it


RE: A Different Application For A Torque Converter

Using an automatic trans converter is very doable. Biggest problem I encountered was airation of fluid. Somewhat rpm limited as converters tend to "ballon" at elevated cycle speeds. Cooling is easy. Airation effects can be delayed by using a large quantity resevoir. Not the best method for analytical data but for comparision purposes its very cost affective.--------Phil

RE: A Different Application For A Torque Converter

The stator is there only to increase torque output of the converter.  For a dyno, you may not want to use this.  It would become a simple fluid coupling.  Strain gauge on the turbine shaft would give you nice torque information.

RE: A Different Application For A Torque Converter

A German company, Voith, do pretty much what you are asking about. They make driveline retarders for trucks. The retarder torque is controlled by the flow of fluid into and out of the turbine via proportional valving. Cooling is by a heat exchanger coupled to the truck cooling system.

RE: A Different Application For A Torque Converter

Your idea brings back a lot of memories. Back in the 70's I was involved in the installation and operation of a water-based chassis dyno. Some info you might find interesting: With supply water at 60F; the piping must be sized to flow 13 GPM of city water to cool 200 horsepower. The average test consumes approximately six gallons of water. The above info provided by Clayton Industries, El Monte, CA.   bub

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


eBook - Integrating the Engineering Ecosystem
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. Download Now
Research Report - Simulation-Driven Design for SOLIDWORKS Users
In this engineering.com research report, we discuss the rising role of simulation and the paradigm shift commonly called the democratization of simulation. In particular, we focus on how SOLIDWORKS users can take advantage of simulation-driven design through two analysis tools: SOLIDWORKS Simulation and 3DEXPERIENCE WORKS. Download Now
White Paper - Industry 4.0 and the Future of Engineering Education
With industries becoming more automated, more tech-driven and more complex, engineers need to keep their skills and knowledge up to date in order to stay on top of this wave—and to be prepared for the Industry 4.0 future. The University of Cincinnati offers two online Master of Engineering degree programs designed specifically for practicing engineers. Download Now
eBook - The Design Gridlock Manifesto
In this eBook, you’ll learn 6 ways old CAD technology slows your company down and hear how design teams have put those problems to rest. “The Design Gridlock Manifesto” shares first-hand modern CAD experiences from 15 companies around the world. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close