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VEMS Community Forum

Technical => Fuel Injection => Topic started by: PeepPaadam on March 03, 2009, 06:48:28 PM

Title: IRF640N as INJFET anyone?
Post by: PeepPaadam on March 03, 2009, 06:48:28 PM
Here in Wiki someone claims to use those with great success but there's no details how to exactly use them. Here's the link: http://www.vems.hu/wiki/index.php?page=MembersPage%2FGergelyLezsak%2FFlyBack

Do you have to have power-flyback/30V transinet diode etc still in place or not?

IRF640N's are cheap and they would be very easy to use.
Title: Re: IRF640N as INJFET anyone?
Post by: MWfire on March 03, 2009, 08:46:31 PM
I did 6cars with irf640n without any problem.
I allway use flyback.
Title: Re: IRF640N as INJFET anyone?
Post by: GintsK on March 03, 2009, 11:18:10 PM
Low-Z also?
What voltage flyback?
Title: Re: IRF640N as INJFET anyone?
Post by: MWfire on March 03, 2009, 11:57:49 PM
Quote from: GintsK on March 03, 2009, 11:18:10 PM
Low-Z also?
What voltage flyback?
yes, two cars with lpg(0.9ohm, 4A for open, 1A for staying open). 0.4V when pwm is activate, 30V when injector must close.
Title: Re: IRF640N as INJFET anyone?
Post by: PeepPaadam on March 04, 2009, 12:43:00 AM
Could you be more specific? Do you use just the 30v diode on the flyback lead and no add-on board power-flyback with Low-Z?
Title: Re: IRF640N as INJFET anyone?
Post by: MWfire on March 04, 2009, 01:00:15 AM
It's active flyback

http://www.vems.hu/wiki/index.php?page=MembersPage%2FDamirMuha%2FLowZinjectorsFlyback
http://www.vems.hu/wiki/index.php?page=MembersPage%2FGoranJurkovic%2FDaewooLaNOS%2FLPG
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