Contents
What affects air/fuel ratio?
Air–fuel ratio is affected by the engine air flow rate at a given engine speed and load mode, and the air flow rate is determined by the intake manifold boost pressure and engine volumetric efficiency.
What should AFR be at WOT?
Best performance for most vehicles is in the 12.5 to 13 AFR range. Going too rich will have the opposite affect and decrease your performance. Getting up to cruising speed or getting ready to pass someone, you usually are looking for the performance to get up and go.
What air-fuel ratio is best for power?
For maximum reliability at full power, air/ fuel ratios from 10.5-12.5:1 are considered best, depending on the engine. Richer than around 10.5:1, you start to get noticeable black smoke from the exhaust and the car can struggle to run properly without misfiring.
What is the best AFR for power?
What’s the best air-fuel ratio for power?
The ideal air-fuel ratio that burns all fuel without excess air is 14.7:1. This is referred to as the “stoichiometric” mixture.
What’s the effect of AFR on engine speed?
This study was investigated the effect of air-fuel ratio (AFR) and engine speed on performance of the single cylinder hydrogen fueled port injection engine. GT-Power was utilized to develop the computational model for port injection engine.
How does air fuel ratio and engine speed affect performance?
The results show that the air-fuel ratio and engine speed were greatly influence on the performance of hydrogen fueled engine especially Brake Mean Effective Pressure (BMEP), thermal efficiency and brake specific fuel consumption (BSFC).
How is the BSFC function of engine speed and torque expressed?
Usually, the fuel mass flow rate is measured in [g/s], the engine power in [kW], which gives the brake specific fuel consumption in [g/kW·h]: Engine power is the product between engine speed and torque. Therefore, we can express the BSFC function of engine speed and torque.
What is the relationship between horsepower and torque?
The relationship between engine power and torque may be expressed as horsepower (hp) = [torque (lb-ft) × revolutions per minute (RPM)] ÷ 5252 In simple terms, torque describes how much work an engine can do and horsepower describes how quickly that work can be done.