Air - Fuel Mixtures.

 

What are Air-Fuel mixtures?

    The air-fuel mixture is a combination of the air and fuel that was mixed inside the combustion chamber in a specific ratio that will help the internal combustion engine works properly. Every gasoline engine will suck an air-fuel mixture for the intake process and the mixture will be combust by the ignition of the spark plug which results in the combustion process.

Types of Air-Fuel mixtures

    The engine will be operating at a different speed throughout the time, sometimes the engine will run at a slow speed, medium speed, and high speed. Each speed will require a specific air-fuel ratio. So, there are 3 types of air-fuel mixtures which are 

• Lean mixtures
• Stoichiometric mixtures
• Rich mixtures

Lean mixtures

    The lean mixture has an air-fuel ratio above 14.7:1. For example, the air-fuel mixture was around 16:1 or which means 16 of air are mixed with 1 of fuel. This means more air was needed in the air-fuel mixtures than fuel to run at lean mixtures when the vehicle is traveling at a slow speed.

Stoichiometric mixtures

    The Stoichiometric Mixture has an air-fuel ratio of 14.7 :1. It does mean that the engine consumes 14.7 air and 1 fuel. The stoichiometry mixture is the optimal mixture that requires for the gasoline engine when the vehicle is traveling at medium speed.

Rich mixtures

    The rich mixture has an air-fuel ratio below 14.7:1. For example, the gasoline engine was running on an air-fuel mixture of 11:1, which means that the engine consumes 11 air and 1 fuel. This rich mixture was used when the engine is accelerating at high speed in order to get up to speed on the road or wanted to climb a hill with a steep gradient at a fast pace.