Why is diesel engine bigger than petrol engine?

So, the diesel engine simply has to be built of sturdier construction than a similar displacement gasoline engine to handle these extra forces created. Consequently, the diesel engine is heavier than a similarly sized gasoline engine.

How does a diesel engine differ from a petrol engine?

The main difference between diesel and petrol engines is that petrol engines use spark plugs to ignite the air-fuel mixture, while diesel engines rely solely on heavily compressed air. In fact, diesel engines have the highest thermal efficiency of any internal combustion engine.

Are diesel engines heavier than petrol engines?

Diesel engines are generally heavier than their petrol counterparts making them slower. As a consequence of a higher compression ratio (longer stroke), diesel engines produce more torque which means you get more acceleration off the line.

How are diesel engines different?

A diesel engine does not use a spark. Rather, it is what’s called a compression combustion engine, and there is a much higher compression ratio on a diesel engine than there is in a gas engine. The air fuel mixture is squeezed so much that it explodes on its own.

Which are the vehicles run with petrol and diesel?

Make a list of vehicle run on petrol and diesel

• Car.
• Bus.
• Truck.
• Train.
• Lorry.
• Aeroplane.
• Scooter.
• Tempo.

Why is the fly wheel of a diesel engine so heavy?

Diesel engine is much heavier than petrol engine so that the power require to move piston in rest three strokes expect power stroke is much due to much inertia so that the fly wheel kept heavy respectively so that the fly wheel can store more energy in the form of inertia.

What is the function of flywheel?

Flywheels are used to smooth the power from the power-stroke and provide sufficient inertia to power the next compression stroke. With diesel engines, they have higher compression ratio than petrol engine, thus we need a heavier flywheel to smooth the running.

What are the disadvantages of a diesel engine?

Diesel engines have higher in-cylinder pressures – particularly required for ignition. This requires higher pumping force in the compression stroke. Diesel engines also operate at lower engine speeds. So the flywheel has to store relatively more kinetic energy at relatively lower speeds.

Why do diesel engines have higher moment of inertia than gasoline engines?

Thus, the flywheel of a diesel engine must have a higher moment of inertia, I (implying higher mass or greater radius). Also, the flywheel in a diesel engine is supposed to absorb and release greater amounts of energy compared to its gasoline counterpart.