IMI Fuel injection Micro Teach

What does EFI stand for?

• Electronic Fuel Ignition

• Electron Fission Indicator

• Electronic Fuel Injection

• Electron Fusion Indicator

What is often integrated into the MAF Sensor

• MAP Sensor

• Air Intake Temperature Sensor

• Engine Speed Sensor

• Road Speed Sensor

Why do we need to alter the amount of fuel injected?

Select all relevant answers.

• To account for different engine speeds

• To account for different engine loads

• To account for different atmospheric pressure

• To meet EU legislation

What is the stoichiometric ratio for Air to Petrol

• 15:1

• 1:14.7

• 1:15

• 14.7:1

If we have 10g of Petrol, how many grams of Air do we need for Stoichiometric combustion?

• 14.7g

• 1.47g

• 147g

• 1.5g

Answer explanation

Stoichiometric ratio is

14.7:1

Air:Fuel

If you multiply the one side by 10 you have to do the same to the other.

147:10

What does MAP stand for in a MAP sensor

• Maximum Air Pressure

• Manifold Air Flow

• Manifold Absolute Pressure

• Manifold Air Pressure

What does MAF stand for in a MAF sensor

• Mass Air Pressure

• Mass Air Flow

• Manifold Absolute Pressure

• Manifold Air Pressure

What is the firing order of a standard 4 cylinder engine?

• 1432

• 1234

• 1342

• 1234

Whose principle is used in Carburettors?

• Bernadette's

• Bernhard's

• Bernoulli's

• Piezo's

What does the first Oxygen or Lambda sensor tell us?

• If the fuel mixture is correct

• How much air enters the engine

• How well the catalytic converter is working

• What the oxygen pressure is