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In  a multi-cylinder engine,why  the firing is done at different time ? what are the firing order for a four cylinder petrol engine?

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In a multi-cylinder engine,why  the firing is done at different time ? what are the firing order for a four cylinder petrol engine? 

firingorder.jpg

 

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Sequence of power delivered in a multi cylinder engine called firing order. It gives balance to engine and load is uniformly distributed in crankshaft. Proper firing order minimise vibration, smooth running and gives high life to the engine.

Firing order for 4 stage engine may be 1-3-4-2, 1-2-4-3, 1-3-2-4, 1-4-3-2 depending on design of crank shaft and cylinder by designer.

main-qimg-736ed563a05c8fa41682637e00934188

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"It gives balance to engine and load is uniformly distributed in crankshaft."

This statement is totally incorrect. Torque is delivered to the crankshaft as a series of pulses, in no way uniform. In a multicylinder engine, torque will be positive at one location while it may be negative at another.

What is a "four stage engine"? Do you mean four cylinder, or perhaps four stroke, or something else?

All the pretty animations in the world are not worth much if the accompanying statements are nonsense.

DrD

 

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Obvious it is 4 cylinder engine as specified in question it self..

This different arrangement are for the load balance is the prime...the animation is for cranks shaft outline..

if above is not correct, can you elaborate the crank shaft design with load distribution in details? 

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