Automobile Engineering in ME
In a Diesel engine, the function of a fuel injector is to

Provide flame front for ignition
Ignite the air-fuel mixture
Mix the fuel and air
Spray atomized fuel in the cylinder

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Automobile Engineering in ME
An imbalance wheel during vehicle operation

Bounces vertically or deflects from side to side (as seen from front or rear)
Makes large noise when its heavy point hits the road surface
Creates a standing wave
Deflects in the vehicle's longitudinal direction

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