Q&A Forum
Hello everyone.
I have an electric brake on a truck and I would like to make a dynamometer for engines. Has anyone done something like this?
And is there software to manage the brake and then get the power curve?
Regards.
Goyo
Hi, you have an eddy current brake? Lots of folks make their own dynos with them.
For a roller dyno the most challenging is to source a suitable roller. I recommend asking in DIY Dyno on Facebook. There are lots of knowledgeable people there.
For an Engine dyno, the challenges are different. You need to gear down the brake, since they have lower max RPM than the engine (typically). A belt works. You will also make sure to have enough capacity in the brake, since they get hot after a little while and hot = weaker for eddy brakes (in particular if the coil wires are aluminium, which is the case for most truck brakes).
YourDyno has what you need on the instrumentation/software side. This kit can do it: Chassis Brake Dyno Kit - YourDyno.com
@cmadmin Hi again, I'm still mulling over this stupid idea of a brake for the engine bench.
If I were to put in an intermediate differential to lower the engine rpm while braking, do you think it would be feasible?
@cmadmin Hello, do you have any exemples of belt reductions. poly V type or synchronious? I was think about about a tremec T56 in 1st gear (ratio is 2.97). My absorber is Telma AC 82-00 (900HP, max rpm 2800). Thanks for your advices
Belt reductions can be used. You can use same style belts are those that are used for heavy duty superchargers. Some hubs use belts to speed up the absorber, so it is a common thing. I would rather use a belt then a gearbox. You may need some help selecting the right belt.