Why is Otto cycle less efficient than Carnot cycle?
The Otto cycle is more complicated than a Carnot cycle, in a number of ways: This makes the engine less efficient that a Carnot engine, because heat is being discharged at a temperature that is not as cool as the environment.
How does the thermal efficiency of an ideal Otto cycle change with the specific heat ratio of the working fluid?
How does the thermal efficiency of an ideal Otto cycle change with the compression ratio of the engine and the specific heat ratio of the working fluid? It increases with both of them. The fuel is injected into the cylinder in both engines, but it is ignited with a spark plug in gasoline engines.
What is compression ratio Otto cycle?
In the ideal Otto cycle the fuel-air mixture is introduced during the induction stroke and compressed to a much lower compression ratio (around 8:1) and is then ignited by a spark. The combustion results in a sudden jump in pressure while the volume remains essentially constant.
How does the four stroke cycle work?
A four-stroke cycle engine completes five Strokes in one operating cycle, including intake, compression, ignition, power, and exhaust Strokes. The intake event is when the air-fuel mixture is introduced to fill the combustion chamber. The intake valve then closes and the air-fuel mixture is sealed inside the cylinder.
Can I mix 4-stroke oil with petrol?
Yes you can but it’s not suitable for long term use. The modern two stroke oils are specially formulated to burn clean and leave few carbon deposits in the motor. Is it okay to run a 4-stroke engine with premixed 2-stroke gasoline?
What fuel do 4-stroke engines use?
As for 4-stroke engines, they run on gasoline without any oil mixed in and the piston goes up and down two times for every combustion cycle, hence it’s called a “4-stroke.” However, 4-stroke engines require valves for both the intake and exhaust that must operate with high precision, making this engine format more …
How do you mix a 50/1 Fuel chart?
You want to mix 2.6 ounces of oil to one gallon of gasoline for a 50:1 mixture. If you’re mixing up two gallons of gasoline you will have to mix 5.2 ounces of oil to two gallons of gasoline for a 50:1 mixture. I would recommend using fresh gasoline that has an octane rating of 89.
What is a 25 to 1 fuel mix?
25 :1 ratio is 25 fluid ounces of gas per 1 fluid ounce of oil. So divide the total amount of fluid ounces of gas by 25 to find the amount of oil to add. 10 gallons X 128 fluid ounces per gallon = 1280 fluid ounces.
How much oil do I need for a 50 to 1 ratio?
For a 50:1 ratio of gas to oil, use 2.6 fluid ounces of oil per gallon of gas. For a 40:1 mixture, use 3.2 fluid ounces of oil per gallon of gas. For a 32:1 mixture, use 4 fluid ounces of oil per gallon of gas.
How do you calculate a mix ratio?
Divide 1 by the total number of parts (water + solution). For example, if your mix ratio is 8:1 or 8 parts water to 1 part solution, there are (8 + 1) or 9 parts. The mixing percentage is 11.1% (1 divided by 9).