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Registered Member #3863
Joined: Thu May 05 2011, 12:52AM
Location: buffalo NY
Posts: 2
So my father and I have a small engine dyno that we want to convert to digital. Are family builds small engines and uses them for racing gokarts. To record the data two people are needed at once, the operator and the recorder i like to call. The operator has to have the hands of a surgeon, and the recorder has to be really fast and legible about writing down the data such as tourq and RPM. At the same time both of the two people have to be extremely precise about either operating the dyno, or recoding down the data. What we would like to do is convert he data and input it into a computer. Where a program written, controls the flow of methanol via a lever on the carburetor, and record the tourq data and the rpm data. my brick wall is mainly the conversion part of it, how do i go about getting the data into the computer. would an arduino work?
Registered Member #27
Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
Yes, just about any microcontroller will do nicely. The microcontroller can control a servo that controls the engine. The RPM can be sensed as a series of pulses. The torque would be slightly more complex to read, depending on the setup you got. Several 4HV members have made similar systems before.
Registered Member #3215
Joined: Sun Sept 19 2010, 08:42PM
Location:
Posts: 780
there are some very simple microcontroller projects using either usb or serial
you can search for a simple pic18f2550 datalogger project (or an atmel equivalent, or arduino)
the main advantage of datalogger projects is you already have access to a free datalogging software usually written by the creators of the project
if you need a tip about speed recording, there is a really simple approach
a mouse wheel with its photodetector, and a frequency to voltage converter and you're done with a nice precision if you can calibrate it against a dyno
Registered Member #3863
Joined: Thu May 05 2011, 12:52AM
Location: buffalo NY
Posts: 2
well I forgot to also add some things I was kinda in a hurry. The engine we are using is a briggs and stratton 4 stroke flat head. But soon we will be using the dyno for a briggs and stratton animal (the vlaves are overhead and not in line with the piston). The dyno has a hydraulic load cell, which is a cast housing with a fan connected to the crank shaft of the motor. The more water that is poured into the cell the more resistance.
But getting back on topic the load cell that we use right now to meaure the torque is a hydraulic load cell. We are considering buying a new load sensor, but we don't know what brand is good or bad. On top of there being so many different types of load cells we don't really know what style will fit the dyno best.
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analog to digital engine dyno conversion
