Encyclopedia

lean mixture

lean mixture

[′lēn ¦miks·chər]
(mechanical engineering)
A fuel-air mixture containing a low percentage of fuel and a high percentage of air, as compared with a normal or rich mixture. Also known as lean fuel mixture.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

lean mix, lean mixture

1. A concrete or mortar mixture with relatively low cement content.
2. A plaster which is not workable.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

lean mixture

A fuel-air mixture where the fuel-air ratio is less than 1:15. See air-fuel mixture ratio.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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References in periodicals archive
Caption: Figure 12: Temporal variation of ratio of specific heats: (a) lean mixture and (b) rich mixture.
Sensitivity of Emissions to Uncertainties in Residual Gas Fraction Measurements in Automotive Engines: A Numerical Study
You might also find that spark plugs are fouling easily, even with a lean mixture set for taxiing.
Carburetor Idle Issues: Check the Mixture First: If you live in a climate with seasonal temperature swings, adjusting the carburetor idle mixture may be required more often than you think. There are some clues
The fuel advancing helps in the high load conditions to release low HC for 40% SFME same time the release of HC is more for both 20% SFME and 40% SFME in injection advancing and it may be due to the lean mixture of fuel.
Effect of injection timing on performance and emission characteristics of diesel engine with coated piston running on sunflower biodiesel blends
As for the rationalization for why the ACIS is called for, he explains, "As you add more exhaust gas and lean mixture out, the mixture is more difficult to ignite, and it burns really slow.
Federal-Mogul advances ignition
Meanwhile, a lean mixture is one where is some air is left after combustion is completed.
The Red Knob II: where to put the mixture: whether we run our engines on the rich or lean side of peak EGT, what we really want to do is avoid high internal cylinder pressures
The lean mixture also provides a more complete combustion process resulting in reduced CO and hydrocarbon levels in the exhaust.
An emissions solution on two-stroke lean-burn engine
Towards lean mixture CO levels are approximately constant at a low level of about 0.5% or less.
Computer simulation and combustion diagnostics of the performance of multicylinder 4-stroke SI engine using CNG as a fuel
Because fuel additive improves the reaction of fuel lean mixture with surrounding oxygen, gas temperature slightly increases and, consequently, more unburned fuel vapours as airborne aerosols appear in the exhausts.
Comparative analysis of the effect of fuel additive SO-2E on diesel engine performance when operating on diesel fuel and shale oil
For lean-burn engines, the venturi and ECV5 are used with a wide-range [O.sub.2] sensor to maintain a constant lean mixture. This mixture can be programmed to change with engine load as the signal requires.
New mixing venturi insert for carburetor retrofits
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