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Magneto Ignition Systems

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Magneto Ignition Systems Table of Contents I. Introduction to Magneto Ignition Systems What are Magneto Ignition Systems? What are the different uses for the Systems? – PowerPoint PPT presentation

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Title: Magneto Ignition Systems


1
Magneto Ignition Systems
2
Table of Contents
  • I. Introduction to Magneto Ignition Systems
  • What are Magneto Ignition Systems?
  • What are the different uses for the Systems?
  • II. Different Types of Systems
  • MBI
  • CDI
  • TCI
  • III. Summary
  • IV. Review Questions

3
What are Magneto Ignition Systems?
  • The purpose of an ignition system is to provide
    sufficient electrical voltage to discharge a
    spark plug at precisely the right time to ignite
    highly compressed air-fuel mixture.
  • Magneto Ignition systems provide current for
    ignition without any outside primary source of
    electricity.

4
Different Uses
  • The primary uses for Magneto Ignition systems are
    in small gasoline powered engines such as lawn
    mowers.

5
Different Types
  • MBI Mechanical Breaker Point Ignition
  • CDI Capacitive Discharge Ignition
  • TCI Transistor Controller Ignition

6
Mechanical Breaker Point Ignition
  • One of the types of ignition systems, the MBI
    system uses a Condenser to prevent current from
    arcing across the breaker point gap as the points
    open.

7
Advantages to MBI
  • MBI does not require a primary source of
    electricity in order to produce ignition in the
    engine.
  • Through the use of the Flywheel and the
    condenser, a continuous current is generated and
    can be easily broken for stopping purposes by use
    of the condenser.

8
MBI in Use
Image courtesy of http//web.telia.com/u85306919/
1912.jpg
9
Capacitive Discharge Ignition
  • CDI is a solid state ignition system, it is one
    of the newest ignition systems used today.
  • CDI is breakerless and the moving mechanical
    parts are replaced with electronic components.
  • The only moving parts are the magnets attached to
    the Flywheel.

10
Advantages to CDI
  • CDI is very easy to troubleshoot, by turning the
    flywheel and watching the sparkplug gap for a
    spark.
  • CDI is compact and maintenance free since the
    only moving parts are the flywheel magnets.

11
CDI in Use
Image courtesy of www.dansworkshop.com
12
Transistor Controller Ignition
  • As the Flywheel magnets rotate they pass by the
    ignition coil in the system.
  • The magnetic field of the magnets induce current
    in the primary windings of the ignition coil
    creating the charge for the spark.

13
Advantages to TCI
  • As with CDI, the only moving parts are the
    magnets on the flywheel.
  • The timing of TCI is more precise with the use of
    the Transistors.
  • Does not use Mechanical Breaker contacts, but
    utilizes semi-conductors instead.

14
TCI in Use
15
Summary
  • The primary purpose of the ignition system is to
    provide sufficient voltage to discharge a spark
    plug.
  • The three types of Magneto Ignition systems have
    advantages over the others but have different
    uses for each.
  • Small engines most prominently use Magneto
    Ignition Systems for firing the ignition of the
    engine.

16
Image courtesy of http//home.howstuffworks.com/ho
w-to-repair-small-engines3.htm
17
(No Transcript)
18
Review Questions
  • 1. Name three components of a CDI system.
  • 2. What is the main purpose of the Condenser?
  • 3. Which of the systems has the least amount of
    maintenance?
  • 4. In the CDI system, what is the only moving
    part?

19
Review Questions cont.
  • 5. What is the main purpose of an Ignition
    System?
  • 6. What does TCI stand for and what makes it
    different from the rest?
  • 7. What is an advantage to using an MBI system?
  • 8. How can you troubleshoot a CDI system?

20
References
  • Roth, Alfred C. Small Gas Engines. Tinley
    Park The Goodheart-Willcox Company, Inc., 2004.
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