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shield on wires (EDIS)
Posted: Sun Feb 17, 2008 11:43 pm
by Maki
I'm installing EDIS to my car according this diagram
http://www.megamanual.com/ms2/edis4ew.gif
would like to understand more about shields on PIP/SAW and VR wires.
What are they for? Are they just grounded?
Also what is the function of 25uF on the 12v wire going to the coil?
Any help would be appreciated
Thanks
M.
Posted: Mon Feb 18, 2008 1:09 pm
by LeslieTroyer
shields perform one of two functions 1) keep "stray" RF from inducing (changing) the signal that is running down the wires inside of the shield or 2) keep RF from being emitted by the wires inside of the shield.
I was told by a EE who specialized in high freq systems that the shields should be attached to ground at ONE end only, and the other end should float.
LEs
Posted: Tue Feb 19, 2008 12:18 am
by Maki
LeslieTroyer wrote:shields perform one of two functions 1) keep "stray" RF from inducing (changing) the signal that is running down the wires inside of the shield or 2) keep RF from being emitted by the wires inside of the shield.
I was told by a EE who specialized in high freq systems that the shields should be attached to ground at ONE end only, and the other end should float.
LEs
What's the RF?
And what means should "float" (not touch enything? be isolated?)
Posted: Tue Feb 19, 2008 8:13 am
by I-W
not connected or touch anything is correct.
RF = Radio Frequency
Posted: Tue Feb 19, 2008 8:26 am
by Maki
I-W wrote:not connected or touch anything is correct.
RF = Radio Frequency
Understood thanks. Is there a rule how long the wire should be? What if I mount the EDIS module near the ECU?
And please somebody tell me about the function of 25uF on the 12v wire going to the coil?
Re: shield on wires (EDIS)
Posted: Mon May 05, 2008 8:13 pm
by lastinline1998
The 25uF is the resistance between the primary and secondary of the coil.
Re:
Posted: Tue May 06, 2008 5:40 am
by gofastant
Maki wrote:I-W wrote:not connected or touch anything is correct.
RF = Radio Frequency
Understood thanks. Is there a rule how long the wire should be? What if I mount the EDIS module near the ECU?
And please somebody tell me about the function of 25uF on the 12v wire going to the coil?
25 uF = 25 micro farad capacitor. Plenty in the search on it.
