How do you calculate fuel consumption per cylinder?
Simple Method
- Formula To Estimate Maximum Engine Fuel Consumption. Gallon Per Hour (GPH) = (specific fuel consumption x HP)/Fuel Specific Weight.
- 300-hp Diesel Engine Example. GPH = (0.4 x 300)/ 7.2 = 105/7.2 = 16.6 GPH.
- 300-hp Gasoline Engine Example. GPH = (0.50 x 300)/ 6.1 = 150/6.1 = 24.5 GPH.
- Other Related Resources:
What percentage of fuel is burned in an engine?
Gasoline (petrol) engines In other words, even when the engine is operating at its point of maximum thermal efficiency, of the total heat energy released by the gasoline consumed, about 65-80% of total power is emitted as heat without being turned into useful work, i.e. turning the crankshaft.
How does fuel burn in a cylinder?
A piston inside the cylinder moves upward, compressing the fuel-air mixture in the closed cylinder. A spark from a spark plug ignites the fuel-air mixture, causing it to burn explosively within the confined space of the closed cylinder. The pressure of the hot gases from combustion pushes the piston downward.
What should be the minimum compression pressure of any cylinder?
100 psi
Usually, manufacturers do not give out detailed specifications on compression numbers but they do offer the following rule: a minimum of 100 psi per cylinder, and a maximum difference of 25% between each cylinder. You should start to worry if one of your cylinders is getting close to 100 psi.
How do I calculate fuel consumption per Litre?
Or, to work it out yourself:
- Fill your tank to the top.
- Zero the trip counter.
- When you next fill up, note the mileage driven.
- Fill the tank again and note the number of litres put in.
- Divide the number of miles driven by the amount of fuel used in litres (miles per litre)
How much energy is lost in an engine?
Currently, up to 65% of the heat energy produced in internal combustion engines, whether gasoline or diesel, is wasted.
Does high octane fuel burn slower?
Fuel with an 87 octane rating burns more quickly while higher-octane fuels burn more slowly. By contrast, a higher-performing engine, which includes engines with higher compression ratios and/or forced induction, requires the slower burn rate of higher-octane fuels to defend against engine knock.
Which fuel burns hotter?
Heat Output As you can see, diesel burns hotter than gasoline and hottest of the three. While gasoline barely surpasses 120,000 BTUs, diesel boasts over 137,000 BTUs per gallon! Kerosene falls a bit short of diesel, burning at almost 132,000 BTUs per gallon.
What is the air to fuel ratio of a lean burn engine?
Air-to-fuel ratios were not provided in the gathered emissions data used to develop the presented factors. Lean-burn engines may operate up to the lean flame extinction limit, with exhaust oxygen levels of 12 percent or greater. The air to fuel ratios of lean-burn engines range from 20:1 to 50:1 and are typically higher than 24:1.
How is the percentage of fuel used determined?
Percentages: This one varies based upon selected power settings during climb, atmospheric conditions, aircraft loadout, winds aloft, etc. you would have to consult the performance tables in the operators handbook in question for this one.
What should the AFR be for an internal combustion engine?
The AFR of the SI engines varies within the range 12:1 (rich) to 20:1 (lean), depending on the operating condition of the engine (temperature, speed, load, etc.). Modern internal combustion engines operate as much as possible around the stoichiometric AFR (mainly for gas after-treatment reasons).
What happens when you put more fuel in the engine?
As explained before, putting more fuel in the cylinder at high engine load and speed, cools down the combustion chamber (through fuel evaporation and heat absorption) which allows the engine to produce maximum engine torque thus maximum power.
https://www.youtube.com/watch?v=G2z9gAfREt0