Automobile Engineering in ME
The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to

Supplies a large amount of fuel and thereby creates a choke effect
Enable the pump's fault diagnosis function to operate
Pressurise the fuel system before the engine is started
Warm up and lubricate the pump

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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)
Creates a standing wave
Makes large noise when its heavy point hits the road surface
Deflects in the vehicle's longitudinal direction

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Automobile Engineering in ME
The major purpose of an electronically controlled automatic transmission is that this type of transmission

Eliminates gear clutches
Reduces the number of automatic transmission components
Reduces shift shock and achieves more efficient transmission of engine torque
Eliminates the gear shaft lever

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