The efficiency of a internal combustion engine varies with size, speed range, compression ratio etc.
Diesel engines use higher compression ratio and operate without throttle control, therefore their efficiency is higher than a equivalent Otto engine.
Large marine (read ship engines) or stationary diesel engine: 50%
Heavy duty diesel engines for marine, stationary and vehicle applications (trucks): 40%
Light duty diesel engines (cars): 30-35%
Gasoline engines: 20-25% + a few % for newer engines
The numbers mentioned above are maximum efficiency, not pedal to the metal efficiency.
Please note that the thermal efficiency of a engine will increase if the combustion chamber surface decrease(!). Higher revs leads to higher forces acting on the piston rings and therefore higher frictional losses, in other words: the mechanical efficiency decreases with increased speed.
can't be sure, but i would definably say jet engine, or else they would use combustion engines with propellers on every airplane
The device that mixes air and petrol for the internal combustion engine is the carburetor. It controls the air-fuel ratio to ensure efficient combustion in the engine.
efficient travel and noise pollution
Combustion engines are very efficient. Combustion does not provide much energy.
If petrol mixes with engine oil in a 4 stroke engine then the mixture becomes thick and its combustion will not be efficient. The exhaust will be smoky due to this incomplete combustion. also this will reduce engine efficiency.
Approximately 5,000 gallons of air are needed to burn one gallon of gasoline in an internal combustion engine. This air combines with the fuel in a precise ratio for efficient combustion to power the engine.
Petroleum
in internal combustion engine combustion happens internally in cylinder and in external combustion engine combustion happens externally in boiler
in internal combustion engine combustion happens internally in cylinder and in external combustion engine combustion happens externally in boiler
It is External-combustion engine.
a gasoline engine is an Internal combustion engine
A steam engine is an external combustion engine.