Need some help from gurus!

G

ga12valve

New Member
Hey Yall, new to this site, looking for some input.

Im in the process of changing turbos on my truck, the new one is a variable
Geometry turbo that can be changed with a electric motor.

My main question is, how would I build a module to read turbo speed in krpm as input, use that in a formula such as "if turbo speed reaches setvalue" and then have it use voltage as an output to control a stepper motor?
 
i-dunno-lol.jpg
 
ga12valve said:
Hey Yall, new to this site, looking for some input.

Im in the process of changing turbos on my truck, the new one is a variable
Geometry turbo that can be changed with a electric motor.

My main question is, how would I build a module to read turbo speed in krpm as input, use that in a formula such as "if turbo speed reaches setvalue" and then have it use voltage as an output to control a stepper motor?
Click to expand...

LOL not asking for much huh? jk.

I don't know much about the turbo that you are installing, but if it is what i am thinking of, it shouldn't be too bad. If it is what i am thinking of, first you would have to look at sensors.

First, for me, i would install an RPM sensor. Inside the turbo on the shaft you could place an optical RPM sensor. (basically a laser light that is set on the shaft with a reflector on the shaft. Every time the reflector does a revolution, sends a signal to the optical receptical). This would measure the RPM's that the shaft is running at. As for Max and min, that would be written for the turbo already.

I would also install a temp sensor, to show the temps that the turbo is running at. I for one wouldn't want my turbo to run too hot.

The control unit itself would be the hard part. If the control unit was just recording the info to show you, you can buy these already manufactured. BUT what your asking is to change some settings as well. There might be a control module out there already that have the features you are looking for, but i do not know of one. Could always make your own, but would require you to solder and make a board (knowing how to do so) with a display and most importantly, make a program that reads and allows you to adjust (will require control module) accordingly. In this you can set mathematics to whatever you choose, and set control scale to whatever you like.


Unless i totally misunderstood what you are trying to accomplish. If so, disreguard my comment and refer back to : Green Dog 252 comment. lol
 
Were on the right track! The turbo has a speed sensor already in it, as the engine controller uses it to actuate the vanes in the vgt actuator. I believe its a hall effect sensor

I guess I should be more specific, how do I physically build a control module to drive a motor. What would I need parts wise?
 
ga12valve said:
Were on the right track! The turbo has a speed sensor already in it, as the engine controller uses it to actuate the vanes in the vgt actuator. I believe its a hall effect sensor

I guess I should be more specific, how do I physically build a control module to drive a motor. What would I need parts wise?
Click to expand...

This might be a flight out of the dark, but seeing as it does use a hall sensor, you might want to look at a treadmill. Yes i said treadmill. Treadmills use hall sensors in their set up (most anyway). The control module of that (can speed up and slow down, while measuring) can be used.

Otherwise if cannot find any module that is close to what you are looking for, you can build one. Exactly how to do this, lol, not my area of expertise. I know that you will need a board that consist of diodes and paradomitor (totally screwed up the spelling of that and cannot think of the correct one that is even close) it is a controller that varies the amount of voltage on the output side. as the controller moves back and forth, the amount of resistance is increase or decreased therfore giving different voltage output). This controller is not an actually large physical controller, is a small electrical one (will see if i can think of the right spelling lol).

First i would research on micro computer boards (that is after all what you are looking to build). The computer board can easily be hooked up to display. So you would need a display output with LCD display. Some sort of control (button) unit which attaches to the board along with all the functions of what you want the board to do.

Sorry i am not much help in specifics (i've never built anything like this). What i would do is look for a control unit for something else that does the same functions. All your looking for is a controller that reads micro pulse which converts to RPMS and controls the amount of voltage output (this would control the turbo). A lot of turbo controllers do this, just gotta find the right one with no restrictions (or very little).

I'll try and help in searching for one. If your set on building you own, good luck lol. I'm no help with that lol.
 
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