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Location:
Brisbane
Registered:
February 2003
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Re: 4agze twin coil ----> individual coils over plugs
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Wed, 07 December 2005 12:55
 
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| mic* wrote on Wed, 07 December 2005 11:07 |
i wana understand this "coil on spark" or waste spark set up that toyota uses coz i hadn seen it till i got my 1G.
I thought that each coil essentially fed the stepped up voltage to two spark plugs. Thus giving a simultaneous spark on two cylinders, one on compression stroke, one on exhaust stroke.
Each coil would only get half the current, but it would be stepping it up for half the load.
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yup, the 1ggze uses waste-spark - different from coil-on-plug or individual coils for each plug.
When a waste-spark fires, the spark plug in a fuel-laden atmosphere will produce a significant spark (e.g. 10s of thousands of volts) and at the same time, the 2nd plus will be in a post-combustion atmosphere and will produce a weak spark of several hundred volts.
The sparks have different characteristics (current/voltage requirements) so they're not just two same-sized sparks from the one coil.
Each igniter (sorry for dodgy spelling earlier) only drives the low-voltage side of one coil, driving two coils will pull too much current thru the device and it will pop/fail.
If you want Coil-on-plug (for a 4cyl), then you should get an aftermarket ECU that has at least 4 ingiter channels.
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| | Subject | Poster | Date |
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4agze twin coil ----> individual coils over plugs
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TauhuTauhu | Tue, 06 December 2005 13:12 |
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Re: 4agze twin coil ----> individual coils over plugs
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thechuckster | Tue, 06 December 2005 15:23 |
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Re: 4agze twin coil ----> individual coils over plugs
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TauhuTauhu | Tue, 06 December 2005 15:28 |
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Re: 4agze twin coil ----> individual coils over plugs
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thechuckster | Tue, 06 December 2005 15:34 |
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Re: 4agze twin coil ----> individual coils over plugs
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M.W.P. | Wed, 07 December 2005 04:56 |
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Re: 4agze twin coil ----> individual coils over plugs
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TauhuTauhu | Tue, 06 December 2005 15:38 |
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Re: 4agze twin coil ----> individual coils over plugs
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-gt- | Tue, 06 December 2005 23:58 |
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Re: 4agze twin coil ----> individual coils over plugs
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mic* | Wed, 07 December 2005 00:52 |
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Re: 4agze twin coil ----> individual coils over plugs
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Cool1 | Wed, 07 December 2005 00:53 |
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Re: 4agze twin coil ----> individual coils over plugs
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mic* | Wed, 07 December 2005 01:07 |
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Re: 4agze twin coil ----> individual coils over plugs
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TauhuTauhu | Wed, 07 December 2005 03:13 |
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Re: 4agze twin coil ----> individual coils over plugs
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mic* | Wed, 07 December 2005 04:18 |
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Re: 4agze twin coil ----> individual coils over plugs
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thechuckster | Wed, 07 December 2005 12:55 |
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Re: 4agze twin coil ----> individual coils over plugs
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mic* | Wed, 07 December 2005 22:54 |
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Re: 4agze twin coil ----> individual coils over plugs
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mrshin | Wed, 07 December 2005 04:46 |
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Re: 4agze twin coil ----> individual coils over plugs
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b1gb3n | Wed, 07 December 2005 05:54 |
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Re: 4agze twin coil ----> individual coils over plugs
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TauhuTauhu | Wed, 07 December 2005 06:11 |
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Re: 4agze twin coil ----> individual coils over plugs
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b1gb3n | Wed, 07 December 2005 06:47 |
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Re: 4agze twin coil ----> individual coils over plugs
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mic* | Wed, 07 December 2005 08:15 |
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Re: 4agze twin coil ----> individual coils over plugs
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TauhuTauhu | Wed, 07 December 2005 13:12 |
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Re: 4agze twin coil ----> individual coils over plugs
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thechuckster | Wed, 07 December 2005 13:37 |
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Re: 4agze twin coil ----> individual coils over plugs
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Henn | Thu, 08 December 2005 03:01 |
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Re: 4agze twin coil ----> individual coils over plugs
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TauhuTauhu | Thu, 08 December 2005 04:40 |
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Re: 4agze twin coil ----> individual coils over plugs
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thechuckster | Thu, 08 December 2005 05:36 |
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Re: 4agze twin coil ----> individual coils over plugs
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mic* | Thu, 08 December 2005 07:42 |
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Re: 4agze twin coil ----> individual coils over plugs
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M.W.P. | Thu, 08 December 2005 07:53 |
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Re: 4agze twin coil ----> individual coils over plugs
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mic* | Fri, 09 December 2005 02:04 |
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Re: 4agze twin coil ----> individual coils over plugs
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M.W.P. | Fri, 09 December 2005 23:19 |
