What do you mean by CI engine?
Compression ignition
What is CI engine and SI engine?
The Spark Ignition (SI) engine, as its name indicates uses spark to ignite the fuel. And in Compression Ignition (CI) engine, the air is compressed within the cylinder and the heat of this compression air is used to ignite the fuel.
How does a CI engine work?
Diesel vehicles are similar to gasoline vehicles because they both use internal combustion engines. In a compression-ignited system, the diesel fuel is injected into the combustion chamber of the engine and ignited by the high temperatures achieved when the gas is compressed by the engine piston.
Which is not use in CI engine?
Why methanol is not used in CI engine? Explanation: Methanol is not used in CI engines because of its high octane number and low cetane number. Pure methanol and gasoline in various percentages have been extensively tested in engines and vehicles for a number of years.
Which engine is more efficient CI or SI?
CI engines have higher Thermodynamic Efficiency With a higher compression ratio in CI engines as compared to SI engines, CI engines have a higher thermodynamic efficiency since more work is done with each expansion stroke.
Which engine has highest efficiency?
The electric engine is most efficient. Electric motors are very efficient at converting electricity into work. Physicists throw around abstract numbers like 90%, whereas when discussing combustion engines, they use numbers less than 40%.
Which fuel is used in CI engine?
ICEs are typically powered by fossil fuels like natural gas or petroleum products such as gasoline, diesel fuel or fuel oil. Renewable fuels like biodiesel are used in compression ignition (CI) engines and bioethanol or ETBE (ethyl tert-butyl ether) produced from bioethanol in spark ignition (SI) engines.
What is the one basic difference between a SI engine and a CI engine?
Now Let’s See the Difference Between SI and CI Engine:
| SI Engine | CI Engine |
|---|---|
| It works on OTTO Cycle or constant volume heat addition. | It works on DIESEL Cycle or constant pressure heat addition. |
| During the intake or suction process, air and fuel are used. | During the intake or suction process, only air used. |
Why are 4 stroke engines better than 2 strokes?
Because combustion takes place with each revolution of the crankshaft with a 2-stroke, this format puts out more power than a 4-stroke engine and the power has more instantaneous delivery. This are some reasons why 2-stroke engines have a long history of use on many different types of motorcycles.
Which cycle is more efficient?
Explanation: Otto cycle is more efficient than Diesel cycle for a given compression ratio. 6. For constant maximum pressure and heat input, the air standard efficiency of the gas power cycle is in the order.
Is diesel engine a SI engine?
Technically petrol engines are called as spark ignition engines ( SI ) and diesel engines are called as compression ignition engines (CI ) . At the end of compression the spark is ignited and then combustion takes place from where the power stroke is obtained.
Which engine has more weight?
Consequently, the diesel engine is heavier than a similarly sized gasoline engine. To normalize the heavy unbalanced power production of diesel engines a heavy fly wheel is often required. This is why petrol engines are always preferred for light-weight applications, such as in 2-wheeler or portable devices.
Why diesel engines have more torque?
Diesel engines are turbocharged to make for the lack of horsepower. It increases the amount of air entering the engine meaning more compression inside the engine. This creates higher pressure in the cylinders, which in turn increase the torque.
What is the average life of a diesel engine?
Properly maintained, most mechanics agree you can expect to keep a diesel vehicle on the road for a solid 30 years. They do, however, require some special care. For example, you can’t expect a diesel to sit all day in sub-zero temperatures and start easily.
Is 200k miles alot for a diesel?
According to Prosource Diesel, anything over 350,000-miles is considered high mileage for a used diesel pickup with a Cummins or Duramax engine under its hood. Anything over 350,000-miles is also regarded as high mileage for a Powerstroke diesel engine.