|
Tractor Talk Discussion Board |
Re: What exactly makes a diesel smoke under a load
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by H. Bowder on August 24, 2006 at 18:01:42 from (24.198.174.199):
In Reply to: What exactly makes a diesel smoke under a load posted by carpenter in belmont on August 24, 2006 at 16:43:51:
Smoke is a result of less-complete combustion. This means not enough air for the amount of fuel to be burned. A piston under load wants to slow down. The operator opens the throttle as a result. That increases the fuel flow and opens the butterfly valve for more air at the same time. Fuel volume is determined by the fuel pump pressure. Air intake volume is determined by atmospheric pressure (14.7 psi if I remember correctly). While the fuel pump can happily inject all the fuel the throttle asks for, the atmosphere can only supply as much air as the piston will pull in; no matter how much the throttle opens the butterfly valve. And a slower-moving piston under load draws in less air (per unit of time). Resulting in less air for the amount of fuel in the piston, resulting in less complete combustion, resulting in smoke. That is why, incidentally, turbo diesels have more power. They pump air into the piston at pressures above atmospheric pressure and produce more concentrated combustible material. If you can concentrate twice the fuel AND twice the air in a piston you get twice the power forcing the piston down -or thereabouts.
Replies:
Home
| Forums
| Order Support
Today's Featured Article -
Show Coverage: Argyle and Mt. Pleasant Labor Day Weekend Shows - by Cindy Ladage. The last fling before summer fades into fall and we get busy in the fields are the annual Labor Day tractor shows. Beginning on September 5th and running through the 7th, the Argyle Antique Gas and Engine Show is held at the Argyle State Park. Located in West Central Illinois, the pine forest was the setting for the opening of the 22nd show. This year we decided to try to sell a few tractor parts, literature and wrenches to offset my husband's buying sprees. Saturday
... [Read Article]
Latest Ad:
65 massey ferguson diesel
[More Ads]
Copyright © 1997-2026 Yesterday's Tractor Co.
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. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|
