Fuel Systems and Starters

Warm up...

How many different fuel induction systems exist?

What does a starter do?? (ANY ANSWER BUT STARTS THE CAR!)

Carburetor

A Carburetor is a method of fuel induction that is 100% Mechanical in nature.

It does NOT require a computer system Found on most small engines Last production car sold with a carburetor was a

Subaru in 1992

Carburetor

Carburetor

How are carburetor works…

http://www.youtube.com/watch?v=9BYm0HnLGRU

Electronic Fuel Injection

• Popular in many Cars, boats, trucks, quads, ect…

• Electronic and computer controlled fuel induction

• Requires an Electronic Control Module (ECM) and a variety of sensors

• 2 types of EFI

• Throttle body injection (TBI)• Multi-port injection (MPI)

Throttle Body Injection

• Uses a single point of injection, typically located at the top of the throttle body.

• May have more than one injector

Multi-point Injection

• Has an injector for each cylinder

• More fuel efficient

• Harder to repair

• http://www.youtube.com/watch?v=umdoG7qdWWs&feature=related

Direct Injection

• Latest form of fuel induction

• Requires an ECM and variety of sensors to run

• Directly injects gas into the cylinder.

• Only air enters in through the intake valve.

• http://www.youtube.com/watch?v=Pxvp9F-PS34

• http://www.youtube.com/watch?v=wmHxiY2J8Ok&feature=fvwrel

Car Starters

• A car starter utilizes magnets, springs, armatures, and gears.

• Upon turning your key the starter receives electricity which pops out and engages a gear into the flywheel of the motor.

• This spins the motor until it is running.

Starters

Why is it potentially harmful to attempt to start the car while it is already running?

http://www.ehow.com/video_4874554_do-motor-starters-work_.html

Assignment

• Completely disassembly an intake plenum with EFI MPI injection and reassemble

• Disassemble a car starter and reassemble