mr. lombardi, lombardo, setter. didis distributor ignition distributorless ignition
TRANSCRIPT
IGNITION SYSTEMS
Mr. Lombardi, Lombardo, Setter
DI and DIS
DI DIS
Distributor Ignition Distributorless Ignition
Distributor
Mechanical device which controls spark timing to the different cylinders through plug wires.
DI Components
Distributor Body Distributor Shaft Distributor Cap Rotor Pick-up Module Coil Distributor Gear Advance Mech
Distributor Body
Hollow aluminum housing that contains all the necessary parts like the shaft, pick-up, advance, rotor, etc…..
Distributor Shaft
The actual spinning part of the distributor
Connected to cam Spins pick-up Spins rotor
Distributor Cap
Molded plastic cap that covers the distributor and distributes electricity to the spark plugs via spark plug wires
Underside of Cap
Rotor
Mounts to shaft Conducts spark from
coil terminal to individual cap terminals
Pick-up Coil
The pick up coil's purpose is to create the pulses of the distributor
The pulses tell the ignition module when to fire the secondary coil.
Ignition Module
Amplifies and reshapes the pick-up coil wave
Coil
The Coil multiplies voltage from the battery
12V in 30,000V to 100,000V out
Distributor Gear
Usually driven off Camshaft
Advance Mechanisms
As RPM increases the combustion process must begin sooner
Two types of advance Mechanical/Centrifugal Vacuum
Mechanical/Centrifugal Advance
As RPM increases Centrifugal Force pushes weights outward advancing the timing
Vacuum Advance
In Ported Vacuum as vacuum increases so does timing. Increase RPM – Increase Vacuum
In Manifold Vacuum as vacuum decreases so does timing. Increase RPM – Decrease Vacuum
Spark plug wires
There are several different Wire types and Manufactures depending on the application
High Tension Ignition Wires There are three basic wire types
CARBON SUPPRESSION CONDUCTORS SOLID CORE CONDUCTOR WIRES "LOW-RESISTANCE" SPIRAL WIRES
Spark Plugs
Spark plugs come in different .. heat ranges Shapes Sizes
Chevy Runs deep