Crank signal genorater emulator 24x and 58x 60-2

Discussion in 'The Projects Forum' started by 04colyZQ8, Mar 21, 2012.

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  1. 04colyZQ8

    Thread Starter New Member

    Mar 21, 2012
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    I am very interested in this project. I would love any assistance that you could provide me with! I am wanting bench test engine harness and in order to do that the engine needs to "run" most of the sensors I can turn off with my tuner, or fake with resistors and transformers. However the crank signal I need!

    I am interested in two types 58x (60-2) and a varried 24x used on GM GEN III and IV V8 engines. I believe them both to be square wave, 12 volt pull up type sensors.

    The 24x maybe very hard to replicate the toothes are spaced unevenly, al though when vied on a scope they appear to be spaced equally I think 24 tooth wheel with know gap would work no problem.

    What are you using for your source voltage? I have a PCM power supply converted to "LAB" power it puts out 12 volts VDC. Will that work? I can solder, but I don't think

    I don't think I can do any programming, do the 4017 need to be programmed? How to I set the jumpers for about 600 rpm, and 24x trigger wheel? Were does the power supply get wired in were it says 14 vc? How do I wire up the sensor inputs. Low ref, 12 volts, and sensor signal., to the PCM? How much are all the parts required to build the circuit , under $50.00 CDN would be great! Thanks for your help. -Jamie

    Here is the diagram from the other thread, if someone could help me work with it or design me another one that would be great!

    http://forum.allaboutcircuits.com/attachment.php?attachmentid=13707&d=1258696436

    Sensor description;

    The Crankshaft Position Sensor (CKP) is mounted
    in the right rear of the engine block behind the
    starter. The CKP sensor works in conjunction with
    a 24X reluctor wheel mounted on the rear of the
    crankshaft. The CKP sensor has a battery power
    supply, an earth, and a signal circuit.
    As the crankshaft rotates, the reluctor wheel teeth
    interrupt a magnetic field produced by a magnet
    within the sensor. The sensor's internal circuitry
    detects this and produces a signal which the PCM
    reads. The PCM uses this signal to accurately
    measure crankshaft position and engine speed.
    The reluctor wheel is mounted on the rear of the
    crankshaft. The 24X reluctor wheel use two
    different width notches (12° and 3°) that are 15°
    apart. This pulse width encoded pattern allows
    cylinder position identification within 90 degrees of
    crankshaft rotation. In some cases, cylinder
    identification can be located in 45 degrees of
    crankshaft rotation. This reluctor wheel also has
    dual track notches that are out of phase. The dual
    track design allows for quicker starts and accuracy
     
    Last edited: Mar 21, 2012
  2. 04colyZQ8

    Thread Starter New Member

    Mar 21, 2012
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  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    I have not been very active on the forums lately, nor have I been monitoring my E-mail on any kind of regular basis. I just happened to run across your E-mail as a fluke.

    I have not been active on the forums as my "main" computers are in storage pending a move. It is unlikely that I will be any more active on the Forums until somewhere around the end of April. All of my simulations and simulation models are on my computers and backup drives that are in storage, and I really don't have anyplace to set them up where I am at the moment.

    The 4017 does not require "programming" as such; it is a 4000 series CMOS IC. It is also available in the 74 series as a 74HC4017. 4000 series ICs are slower than the 74 series, but can operate over a wider range of voltage. The 74xx series are faster, however 4000 series should be plenty fast enough.

    Don't expect any kind of fast replies to the thread from me. I might check the forum every couple of days, and don't reply to threads very often.
     
  4. gte

    Active Member

    Sep 18, 2009
    347
    4
    I too had to do this because I wanted to test code I had written that will read a crank signal sensor.

    I have code to generate various tooth signals on my uC, but you'd have to get the uC and supporting hardware, and then design the hardware to turn the uC's 3.3v =< 30mA digital out into a 12v pulse. I guess you could just use an FET for this.

    There is also something called a "jimstim" for the megasquirt EMS builders. It is pretty cheap and does a variety of things, I do not know if it will do your specific trigger wheel setups, but since they are common I would imagine it will.

    http://www.jbperf.com/JimStim/index.html
     
  5. TBMSport

    New Member

    Jun 17, 2012
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    Does that mean there is a way to convert a GM 24x tooth to a 58x signal?
     
  6. 04colyZQ8

    Thread Starter New Member

    Mar 21, 2012
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    I'm not sure but Lingfengter not spelled right now makes a 24x-58x convertor box, as well as a 58x-24x box. Allowing you guys to offer the 6L80E in the Trailblazers with PCM swap and the box, rather then dropping the crank and changing reluctors, hope this helps.
     
  7. TBMSport

    New Member

    Jun 17, 2012
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    Thanks. Shortly after I found this thread I discovered the Lingenfelter component.
     
  8. 04colyZQ8

    Thread Starter New Member

    Mar 21, 2012
    4
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    Glad to hear.. you guys have some amazing products!
     
    Last edited by a moderator: Apr 19, 2014
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