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powerboy

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Posts posted by powerboy

  2. Cranking Algorithm

    in G4+

    Posted

    Dear sir,

    I would like to inquire about the details of the cranking algorithm. Initially, I set up a 24-2 crank and 1 cam sensor on a 2-cylinder engine.
    Consequently, the missing teeth to 1 piston TDC is more than 180 degrees, and the cam pulse is BTDC (Before Top Dead Center) by 10 degrees. During the calibration process, using the cam pulsex1 and Trigger priority = 2, we found that 215 degrees is the match for 1# TDC.

    Recently, in my attempt to learn more about the cranking algorithm, I turned off and unplugged the cam sensor. However, I forgot to change the ignition to wasted spark and the injector to multi-point group.
    Surprisingly, the calibration showed 205 degrees as the match for 1# TDC with Trigger priority = 1. The engine ran as smoothly as it did with the cam sensor connected, and there was no increase in "Trig error counting."

    I have a couple of questions:

    Without the cam sensor, using only the 24-2 teeth on the crank wheel, direct spark, and sequential injection, is the accuracy of ECU acceptable?
    Is there a special algorithm to track vacuum in the manifold while cranking?
    Thank you for your assistance.

  3. CB650 ECU not spark

    in G4x

    Posted

    Hi everyone

    I try to start my bike CB650.
    I triple-check all of ECU's conditions.
    There is only a crank sensor with 16-3 pattern (Link g4+ woking fine).

    Setup
    Inject test = OK
    Ignition test = visually confirm, spark is OK
    Engine protection rpm = 10,000

    While cranking
    Engine rpm = OK
    Trigger error = only 1 count-up
    Injector and Ignition status = solid activate
    But it did not spark.

    Are there other parameters that I must recheck?

    Thank you 

    CB650.pclx

  4. How to hold Aux output?

    in G4+

    Posted

    Hi sir.

    I need to crate a safety function which is can be reset by cycle the ECU power.

    Ex.

    Aux 1: GP output (low side for relay)

    Cond 1 only

    Cond1: AN4 > 0.5 v.

     

    Normally An4 is  0.7 to 3V.

    In case of error An4 below 0.4, Aux 1 will be off.

    And i want to holding Aux 1 in off stare until ECU reset by cycle power.

     

     

  6. Pull down Analog Input of Fury

    in G4+

    Posted

    I try to apply analog input to special condition (brake pressure sensor and DBW safety condition). 
    I need to create possibility fault protection by Virtual Aux, ex An volt 1 < 0.5  or An volt 1 > 4.5.
    I test the condition by putting  an on-off switch in line of An volt 1.
    Noticeably, after cut off the switch of An volt 1, voltage of An volt 1 swings so long time and not below than 0.5.

    I wound like to ask your help about external pull down resistor.
    Is 100K or 1 M ohm ok for Fury without trouble to ECU and the sensor?
    I knows output impedance of the brake sensor but i don't known input impedance of Analog channels.

    Regards

  11. Injector rate 1 Engine cycle vs 1/2 Engine cycle

    in G4+

    Posted

    Hi everybody 

    Short question.

    I added cam sensor to our engine 2 cylinders (standard engine is only 24-2 crank sensor).
    With the cam sensor adding, if i change the injector rate from 1/2 engine cycle to 1 engine cycles.

    1. Value in Fuel table must me double or not?
     2. Is it need to re-tune fuel?   (in case of re-tune, i will left 1/2 engine cycle).

  14. "Trigger Arming threshold and Filtering Level" meaning

    in G4+

    Posted

    I would like to ask the meaning of Trigger filtering level.
    In help online is a sentence to explain it "Some trigger signals contain a large amount of high frequency interference and electrical noise,..................".

    Trigger arming hold is the threshold which direct variation with trigger voltage. 
    But, i don't get the main idea of filtering level.
    Level 1-4 are low-pass filter or anything else?

  16. Engine rpm strange on 24 teeth on crank and 1 teeth on cam

    in G4+

    Posted

    Any body help me to solve my problem.

    My engine is one cylinder with 24 (reluctor) and 1 (hall) teeth on crank and cam.

    The crank sensor signal very clear on oscilloscope.
    The crank arming threshold is
    0      1000  2000   3000  4000    5000   6000  7000
    0.2    0.4      0.7    0.9     1.1      1.3      1.6    1.8

    But sometime, while cranking, the engine rpm rise over 2000 RPM  immediately (last 20 second in log file) and engine knock sound very loud and engine suddenly brake. 
    How can i check my Link ecu crank cam input brake or not good condition working?

    In the log file on the time  -2.06 to -1.54, i try to rev engine to  highest rpm and check the crank and cam on oscilloscope.
    The signals looking good no any noise but in logger show the engine rev over 12000 rpm at time -2.00.
     

    Mar_05Log.llg

  17. Tuning Table size

    in WishList

    Posted

    More then 10  with Link ECUs with difference engines/cars.

    Size of fuel and ignition main tables 22x20 cells are too small, especially number of rows for high boost engine.

    In case of multi target boost levels, 20 rows are concentrate to  boost levels, thus 2-5 rows in vacuum for constant speed and relax drive are not perfect.

    Haltech elite is often compare  with Link which Haltech's table size is  32x32.

    If the new firmware is concentrate on fuel and ignition table size, Link ecu will be no competitor and closed to the best Ecu in market. 

  20. Number of teeth for Trigger 1

    in G4+

    Posted

    Hi Scott

    I confuse your words "does not update position/speed.... next tooth arrive".

    Example: 4 teeths of crank sensor per rev, ignition @15 BTDC, perfect a crank  tooth and cam signal at 0 TDC.

    From your words, the 15 BTDC is not possible to trig the coil because ecu will update positions on 0 90 180 270 360 ... 720 degrees.

    Is I missed something.

    The 15 BTDC should be calculated/approximated/predicted form time difference of two teeth BTDC (630 and 540 degree crank teeth).

    Based on your word and Link ECU ignition resolution , for the most accuracy is 360 pulses on crank?

     

     

  21. More Trigger pattern and software GUI

    in WishList

    Posted

    Hi Simon

    I agree with you what most of EFI engine come CPS is divisible into 360.
    But some of old engine with carburetor system there is only one trigger on crank wheel (2 pulse per 720 degree) for wasted ignition trig.
    The 2 pulses per 720 degree are not accuracy, So some of crank gear is adapted like CPS.
     

    Thank you

    Boy

  22. More Trigger pattern and software GUI

    in WishList

    Posted

    "I'm happy to ask the engineers if it is possible. Do you have some examples of motorbike engines and what trigger patterns are found on them?"

    Example of engines in my experience 
    Yamaha MT01  15-2 teeth
    KTM 250-540  33teeth and 31teeth (modified, change carburetor to injector system)
    Honda s2000   13+1 teeth

    And thank you very much about youtube link to setup tuning gui.
    Boy

  23. More Trigger pattern and software GUI

    in WishList

    Posted

    After i play with Fury more than two months with 4 engine.
    So i has a few requirements.

    - Is it possible to update the firmware to support trigger 1 support not only "A valid tooth count must divide evenly into 360".

      So many moto-bike engine crank wheel is not match with this condition.

    - For software tuning page, is it possible to shows 3D Fuel graph and Fuel table on the same time.
     

  24. Number of teeth for Trigger 1

    in G4+

    Posted

    Hi everybody 
    In software help, it is recommend to use number of teeth must be divide evenly into 360 such as: 60, 30, 24, 12.
    But my engine is one cylinder with 33 crank teeth (360/33 = 10.909).
    Is it Ecu (fury) will working correctly with high RPM (10000+)? 
    And in help, it recommends like what 32 teeth is an only exception case?

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