Re: Direct injection gas engine with 18:1 CR - Saab General Bulletin Board - Saabnet.com
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Re: Direct injection gas engine with 18:1 CR
Posted by Simon S (more from Simon S) on Wed, 12 Sep 2012 08:12:47
In Reply to: Direct injection gas engine with 18:1 CR, ryan [Profile/Gallery]
, Tue, 11 Sep 2012 20:11:34
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Preignition from what sources? What could cause preignition that would not cause it in this scenario?
If the compression is too high, the fuel is going to be ignited before your spark.
If the spark plug is glowing too hot, it is going to ignite the fuel before your spark.
You simply can't have your cake and eat it too: it's either spark ignition or compression ignition.
The main reason for GDI as far as i can tell, is that you eliminate the need for a throttle plate, and therefor eliminate a lot of pumping losses.
posted by 24.22.62...
Posts in this Thread:
- Direct injection gas engine with 18:1 CR, ryan , Tue, 11 Sep 2012 20:11:34
- Re: Direct injection gas engine with 18:1 CR, Justin VanAbrahams , Wed, 12 Sep 2012 09:29:25
- Re: Direct injection gas engine with 18:1 CR, Simon S, Wed, 12 Sep 2012 08:12:47 <-- Viewing This Message
- Re: Direct injection gas engine with 18:1 CR, Craig, Wed, 12 Sep 2012 07:36:56
- Re: Direct injection gas engine with 18:1 CR, BobS, Tue, 11 Sep 2012 21:15:34
- Re: Direct injection gas engine with 18:1 CR, Cmyles , Tue, 11 Sep 2012 20:44:16
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