Go Back   EcoModder Forum > EcoModding > Instrumentation > OpenGauge / MPGuino FE computer
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-03-2010, 11:02 AM   #151 (permalink)
German Car Lover
 
Join Date: Jan 2010
Location: Long Beach CA
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
My GTI does not have cruise control, so its all analog.
Putting a analog VSS(Permanent Magnet Style) sensor like the bicycle was an option but I wanted to know if there are a Hall effect sensor that you could put in line the speedo. I remember I have seen it on like an Jeep, where it has a shaft that connects to your speedo cable, and has two wires coming out for a electric signal. It would not be a digital signal but its would be a frequency one.
Would the MPguino would pick up the signal like that? or it has to be a digital one (like a hall effect)
Thanks for the reply. I cant wait to get my hands on mine.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-03-2010, 04:02 PM   #152 (permalink)
EcoModding Apprentice
 
Eddles's Avatar
 
Join Date: Apr 2009
Location: Sheffield, England
Posts: 142

Eddles's Astra - '01 Vauxhall Astra ECO4
90 day: 61.03 mpg (US)
Thanks: 41
Thanked 3 Times in 2 Posts
When I installed aftermarket cruise control on my car, the manual had information on how to solve the problem of getting speed data to the cruise control on cars with a mechanical speedometer, or no electronic speed pick-up[1]. It said that there was an optional package that can be brought and installed, and then wired up to the cruise control. I was lucky enough that my car had an electronic speedometer, so I don't know much about this.

Maybe it's worth looking for something like this if it's cheap? If you want, I can have a peek in the manual and find out more about this? Of course, I don't know if this will actually work with the MPGuino so it's just my 2 cents.

[1]Like one car I used to have that was built in 1990, had a strange electronic/mechanical hybrid piggy-backed on top of each other - the electronic pick up went to the computer, while the mechanical one went to the speedometer. Double check your car don't have this?
__________________

My aim: to achieve 3L/100km.
Best tank @ 65mph: 864.2 miles 69.36MPGus 3.4l/100km
  Reply With Quote
Old 01-07-2010, 03:22 PM   #153 (permalink)
EcoModding Lurker
 
Join Date: Jul 2008
Location: Northern Alabama
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Back in the '70s, Heathkit sold a cruise control package that was basically Dana (now Rostra) hardware. The VSS sensor arrangement was two or four (memory is fuzzy) magnets taped to the driveshaft with a pickup coil placed in close proximity to them. OEM systems based on the same design usually had a speed sensor in the middle of the speedometer cable. IIRC, these devices worked as small generators and produced a voltage that was proportional to vehicle speed.

Today, one could use a Hall effect sensor in much the same way to generate pulses.

--Glen
  Reply With Quote
Old 01-07-2010, 03:31 PM   #154 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 269 Times in 212 Posts
hall/magnet is better since it will work at slow speeds. the coil/magnet needs a certain amount of rpm before it will make a strong enough signal.
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 01-07-2010, 03:41 PM   #155 (permalink)
Master EcoModder
 
Join Date: Oct 2009
Location: Phoenix AZ
Posts: 742
Thanks: 4
Thanked 60 Times in 52 Posts
Magnets on drive shafts

I have installed about 6 of these types on many cars and trucks I have owned, and it is only used as signal generator, not a voltage generator, and would work down to around 30 MPH and up to 80 + MPH normally.

A lot of aftermarket cruse controls came with them as did the old mileage computer.

Most of the time it was only two magnets wired to the shaft.
I read somewhere how to make a set by taking the coil from a 12 volt relay and using it to pick up the magnets when you got a unit with no magnets or pick up and it was left on the car.

Rich
  Reply With Quote
Old 03-05-2010, 10:58 PM   #156 (permalink)
halos.com
 
Join Date: Oct 2009
Location: Oklahoma City, OK
Posts: 528

ECONORAM - '07 Dodge RAM 1500 QC SLT flex-fuel
90 day: 18.16 mpg (US)

the Avenger - '08 Dodge Avenger SXT
90 day: 27.06 mpg (US)
Thanks: 385
Thanked 94 Times in 80 Posts
Send a message via Yahoo to ECONORAM
Donation sent. I have found the VSS values for my Dodge RAM, or at least I think so. I just need to find the usec/gal for my truck. Yes, my truck is CAN bus, but I already have a Superchips 3815 that I use to monitor most gauge readings, including ignition advance and fuel trims (and I can data log with it) so I really need something that does not use the OBD plug...
  Reply With Quote
Old 03-15-2010, 10:47 PM   #157 (permalink)
halos.com
 
Join Date: Oct 2009
Location: Oklahoma City, OK
Posts: 528

ECONORAM - '07 Dodge RAM 1500 QC SLT flex-fuel
90 day: 18.16 mpg (US)

the Avenger - '08 Dodge Avenger SXT
90 day: 27.06 mpg (US)
Thanks: 385
Thanked 94 Times in 80 Posts
Send a message via Yahoo to ECONORAM
Well, I gooned my install a bit. I used the VSS ground (DG/VT) instead of the VSS output wire (DG/BR). I drove with it like this for about 300 miles. Did I fry anything? I have since found the correct wire, but have not reconnected. I will say the fuel consumption portion worked great. It was neat to see the gallons tick by (until I realized how many that really was...).
  Reply With Quote
Old 03-16-2010, 04:07 AM   #158 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 269 Times in 212 Posts
if that was the only "oops" then it should be fine. Sounds like you have an initial correction factor for fuel sorted out.

Do you know if it is a 12v signal on the vss?
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 03-19-2010, 09:21 PM   #159 (permalink)
halos.com
 
Join Date: Oct 2009
Location: Oklahoma City, OK
Posts: 528

ECONORAM - '07 Dodge RAM 1500 QC SLT flex-fuel
90 day: 18.16 mpg (US)

the Avenger - '08 Dodge Avenger SXT
90 day: 27.06 mpg (US)
Thanks: 385
Thanked 94 Times in 80 Posts
Send a message via Yahoo to ECONORAM
Thanks dcb,
Yes, I think I got a pretty good fix on the usec/gallon. I am using 0114596879.1. That may not be dead on, as I had driven about a mile before I was able to recalibrate, but it is close.
I had assumed it was 12v, but learned tonight from a site that the vss signal gets a 5v feed. I tried the vss input wire tonight, but it only seems to get a signal up to about 5 mph, then nothing. I was thinking about finding the feed off the tranny before I read that thread. Now I'm at a loss. Any ideas? Thanks, Dave
edit--I forgot to ask, how could I measure this while driving?

Last edited by ECONORAM; 03-19-2010 at 09:28 PM..
  Reply With Quote
Old 03-20-2010, 02:43 PM   #160 (permalink)
EcoModding Apprentice
 
Join Date: Aug 2009
Location: terra firma
Posts: 138
Thanks: 4
Thanked 24 Times in 22 Posts
for a 5v vss, try swapping the 100k resistor with a smaller one, like 30k.

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
MPGuino release one workspace dcb OpenGauge / MPGuino FE computer 1061 01-17-2020 01:37 AM
For Sale Preassembled MPGUINO NEW $45. randall OpenGauge / MPGuino FE computer 1 10-24-2009 04:13 PM
MPGuino, Preassembled BRAND NEW Sean T. For Sale 4 10-22-2009 07:00 PM
Brand New MPGuino Preassembled Sean T. For Sale 1 06-17-2009 01:02 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com