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Switch for Piezo Injector

Discussion in 'Electronics Homework Help' started by contiContiCONTI, Oct 11, 2018.

  1. contiContiCONTI

    contiContiCONTI

    3
    0
    Oct 11, 2018
    CALLING ALL CIRCUITS JUNKIES!

    Good day all!

    I am a mechanical engineering student and need help with some circuits ideas. My project requires me to model and construct an injector system for a one cylinder motorbike engine. We chose to use a piezo injector which, when a current passes through it, injects compressed air into the cylinder. To make this injection controlled, I require a type of ON/OFF switch that will close for around 10ms (letting current pass to the injector and therefore air into the cylinder), then open for about 60ms.

    The problem is that we have multiple varying parameters (cylinder pressure and engine speed). Therefore, the opening and closing times will need to vary quite drastically from test to test. I need a switch which I can program with a MATLAB code that will stay open and closed for a specific amount of time depending on the coding. Without manual adjustment to the actual switch.

    Please recommend any device or circuit idea that would allow me to do this.

    Thank you!!!!

    Christian.
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    24,866
    2,571
    Jan 21, 2010
    Have you heard of a MOSFET?
     
  3. contiContiCONTI

    contiContiCONTI

    3
    0
    Oct 11, 2018
    No, I know nothing of electronics and circuits unfortunately hahah is it the type of device I should consider? How does it work?
     
  4. WHONOES

    WHONOES

    564
    111
    May 20, 2017
    How much current is required by you Piezo injector.
    A Mosfet is the right way to go.
    May I suggest you have a look at the link below for an understanding of what a Mosfet is.

    https://en.wikipedia.org/wiki/MOSFET
     
  5. contiContiCONTI

    contiContiCONTI

    3
    0
    Oct 11, 2018
    Thank you! Do you know how I could hook this up to MATLAB and set it on a timer? Maybe using an Arduino board?
     
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