1. Different Systems in Powering a Car

2. Iginition System Batteries Primary Cable Ignition Coil
Coil High Tension Cables
Distributor
Spark Plug Cables
Spark Plug
Alternator

3. Types of Ignition System
Breaker Ignition
Electronic Ignition
Electronic Ignition
Doesn’t need contact pts
Triggering occurs thru electronic modules
Direct Ignition
Supplies voltage directly to spark plug
Direct Ignition

4. Starting System Starting Cables Batteries Starter Motor Flywheel
Switch

5. Two Actions During Starting
Pinion of Starter motor meshes with flywheel; and
Starter motor operates to start the engine
Starter motor
Provides high turning effort at low speeds
Starter cables are thickest b/c it must provide high magnitude of current to turn the crank of an idle engine

6. Cooling System A fraction of heat is converted to work
The rest must be removed to prevent engine parts from seizing
Types of Cooling
Liquid
Air

7. Types of Cooling System
Liquid cooling uses coolant (chemical Mixed with water)
Flows thru passages of the engine (water jackets) and thru radiator and pump
Pump
Connected in front of the engine and turned by belt connected to crank shaft and uses centrifugal force to drive water out
Air Cooling
For small IC engines
Uses fins with Surface area as large as possible
Liquid Cooling
Water Jackets
Air Cooling

8. Carburetor System Old System Blends Air and Fuel
Works on Bernoulli’s Principle
Two Types
Fixed Venturi
Variable Venturi
The speed of air and pressure determines the amount of air drawn in the engine
VV types prove to have a problem

9. Throttle valve connected to accelerator