How is air-fuel ratio control?
The control valve is controlled by the detecting signal of an oxygen concentration detector arranged in the exhaust passage so that the air-fuel ratio of a mixture fed into the cylinder of an engine becomes equal to the stoichiometric air-fuel ratio.
What does air to fuel ratio do?
Air–fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process. In an internal combustion engine or industrial furnace, the air-fuel ratio is an important measure for anti-pollution and performance-tuning reasons.
What is the purpose of an air-fuel ratio controller and simply explain how it works?
What is Air-Fuel Ratio in a Carburettor? The carburetor’s main function is to mix the fuel with air in a perfect ratio. It does so according to the engine’s speed and load conditions. Theoretically, the ideal mixture contains 15 parts of air and 1 part of gasoline fuel.
What is air-fuel ratio for boiler?
In modern boilers, excess air should achieve approximately 10% (2.2% oxygen). This will vary from boiler/burner to boiler/burner and from application to ap- plication; always consult the burner manufacturer’s manual. Who can set this Fuel/Air Ratio Curve?
What is air fuel ratio for boiler?
What is best air fuel ratio?
14.7:1
Through determining their chemical composition, all fuels are assigned what is called a stoichiometric air to fuel ratio, with 14.7:1 being the perfect value determined for pure gasoline.
How do you calculate air/fuel mixture?
The ideal (theoretical) air-fuel ratio, for a complete combustion, is called stoichiometric air-fuel ratio. For a gasoline (petrol) engine, the stoichiometric air-fuel ratio is around 14.7:1. This means that, in order to burn completely 1 kg of fuel, we need 14.7 kg of air….Air-fuel ratio, lambda and engine performance.
| Fuel | Chemical formula | AFR |
|---|---|---|
| Hydrogen | H2 | 34.3:1 |
What is excess air in boiler?
The percentage of excess air is the amount of air above the stoichiometric requirement for complete combustion. The excess oxygen is the amount of oxygen in the incoming air not used during combustion and is related to percentage excess air. For example, 15% excess air equals 3% oxygen while firing natural gas.
Does more air mean more fuel?
Increased air flow will give you better fuel efficiency at the same HP output. It reduces the internal HP losses of the engine. Any increase in air flow should increase efficiency.