Posted by jdemaris on December 30, 2008 at 13:50:49 from (67.142.130.18):
In Reply to: Re: Timing Question. posted by Guido on December 30, 2008 at 12:15:17:
An internal combustion engines uses ignition to light up a fuel charge and make an explosion.
A spark-ignition system uses an electrical spark to start the explosion. Most gas engines work this way. Ignition timing is usually referring to the time-of-spark. Doesn't matter where it occurs since it travels at 186,000 plus miles per second.
A diesel engine uses compressed air to make heat to ignite the fuel-charge, and is usually referred to a compression-ignition engine. Diesel ignition timing is usually referring to the time of fuel injection - but not always. Since fuel does not move at the speed of light there is always diesel-timing-lag. The lag is the time difference between the time of fuel injection, the time it takes for the fuel charge to travel from the injection pump and through the injector, and the actual time of useful combustion. That is why timing diesels can be confusing unless you know, for sure, what the timing specs refer to. GM and Ford usually give timing specs both ways - for time of injection at the pump, and also for time of combustion that's measured with a luminosity probe.
The glow plug in a conventional diesel is just a starting aid to help the engine start when it lacks combustion heat.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
