air fuel ratio
Air–fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process. The combustion may take place in a controlled manner such as in an internal combustion engine or industrial furnace, or may result in an explosion (e.g., a dust explosion, gas or vapour explosion or in a thermobaric weapon).
These sensors operate by measuring the free oxygen content in the exhaust gas and converting that amount of oxygen into a specific voltage. As you can see from the graph, a narrow-band sensor will deliver a 0.45-volt reading when the air-fuel ratio is at 14.7:1. Because the voltage line is so steep,
What Is the Proper Air / Fuel Ratio. From a strictly scientific point of view, a perfect Air/Fuel ratio will be 14.6:1, or 14.6 parts air for 1 part fuel on a gasoline engine. In the real world however, this perfect number changes quite a bit depending on air temperature, engine configuration, and especially on whether your engine is naturally
Air-fuel ratio, lambda and engine performance. When the air-fuel ratio is lower than the stoichiometric ratio, the air-fuel mixture is called rich. For example, for a gasoline engine, an AFR of 16.5:1 is lean and 13.7:1 is rich. In the table below we can see the stoichiometric air-fuel ratio for several fossil fuels.
Measuring Air/Fuel Ratios
On the next pull, the engine ran at 11.3:1 air/fuel ratio at peak torque between 5,200 and 6,500 rpm, but then it started to lean out at 6,700 rpm and continued to lean out to 12:0:1 AFR between 7,000 and 7,700 rpm. Between 7,700 and 8,200 rpm, the fuel ratio started heading back …
Aug 07, 2017 · In this video, we discuss air fuel ratio, why different fuels have different air/fuel ratios, what is meant by rich and lean, and what happens if you run your engine rich or lean.
Air Fuel Ratio Sensor AFR 234-9096 Upstream Oxygen Sensor 1 for 2010-2012 Nissan Versa L4-1.8L, for 2010-2012 Nissan Sentra L4-2.0L Exc Calif.