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Lesson Plan Originally Created By: sergio marquez

Ignition systems types (updated) by Sergio Marquez

Part of Unit: Engine Performance Fundamentals

Lesson Plan Overview / Details

Students will understand the function of an ignition system, the types of ignition systems, and identify major components, the operations of ignition coils, spark plugs and spark plug wires.

Ignition Systems

Two Blocks
180 Minutes

Standards

Students will be able to:

  • Understand the different types of voltages
  • Identify the three functions of an ignition system
  • Identify the types of ignition systems and their major components
  • Describe the operations of ignition coils, spark plugs and spark plug wires, as well as their timing and firing order

Activities in this Lesson

  • Shock of your life Hooks / Set

    I will show the students an actual visual aide/trainer of an actual functioning ignition system. I will then tap into their prior knowledge and ask if anyone has experienced an electrical shock.  I will wait for the student’s responses at this time.  Have discussion, check for understanding, safety precautions, and move on to the next activity.

    Resources and Materials

  • Voltage types Demo / Modeling

    I will explain what Alternating Current Voltage is and show what it looks like on a scope (draw or show an AC wave form).  Then, give examples of what uses AC voltage (examples include TVs and other home appliances) and where it comes from.

    I will explain what Direct Current Voltage looks like on a scope (draw or show a DC wave form) and give examples of what uses DC voltage (examples include automobiles and portable devices like your cell phone).

  • While lecturing, students will follow on text book (Thomson Delmar Learning, "Automotive Technology: A Systems Approach," 4th edition) pages 595-626.

    I will explain the three main functions of the ignition system to the students. I start by telling them that the first function is to generate a spark that has enough heat.

  • While lecturing, students will follow in their text book (Thomson Delmar Learning, "Automotive Technology: A Systems Approach," 4th edition), pages 595-626.

    First, I will explain and show what a standard ignition system consists of, years involved, components and voltage outputs. (For example, early years to about 1974, distributor, cap & rotor, points and condenser, ignition coil, spark plugs and spark plug wires).   Voltage output is about 20KV to 30KV.

    Second, I will explain and show  what a high energy electronic ignition system (HEI), consists of, years involved, including the components their function and voltage outputs. (For example, 1975 to 1989, HEI distributor, cap and rotor, ignition module and transistor, pick-up coil, ignition coil, cap and rotor, spark plug wires and spark plugs). Voltage output is about 40KV to 50KV.

    Last, I will explain and show what distributorless ignition system consists of, years involved, components and voltage outputs. Explain the coil packs with the waist spark method (for example, 1989 to present date, DIS module, DIS coil pack, crank and cam sensor, spark plug wires and spark plugs). Voltage output 50KV to 60KV. Refer to fig. 24-46.

    Explain the benefits, evolution of the DIS, from module, coil-pack, spark plug wires, crank and cam sensor, to no wires, module and individual coils on top of each spark plugs, crank and cam sensor.

    Resources and Materials

  • Timing and firing order Demo / Modeling

    While lecturing students will follow on text book (Thomson Delmar Learning, "Automotive Technology: A Systems Approach," 4th edition), pages 597-598.

    I will explain that ignition timing refers to the time spark occurs and the position of the # 1 cylinder piston in relation to crankshaft rotation this is called base ignition timing.  Explain that when the two marks line up, this is called TDC (Top Dead Center) or 0 degrees, on the #1 cylinder compression stroke. Refer to fig.24-2 page #597. Timing marks are typically located in the front of the engine on the timing cover and crankshaft pulley. From TDC or 0 degrees to the left of engine rotation is referred to BTDC (Before Top Dead Center), to the right of TDC or 0 degrees is referred as ATDC (After Top Dead Center). Refer to fig. 24-2 page #597 and fig. 25-36 page #647.

    I will explain that firing order, referring to the order that each cylinder is fired after the #1 cylinder, ex. if the base timing for an engine is 8 degrees BTDC then all cylinders will fire at 8 degrees when each one come up on there compression stroke, in a firing order. Refer to fig. 24-3 page 598.

    Resources and Materials

  • clean up Closure

    Have all studants pick up and sweep up if needed, wipe down vehicles worked on, put away any tools used and put away books, finaly put chairs up on table.

Assessment

Assessment Types:
Writing Samples, Teacher-Made Test,

(From Thomson Delmar Learning, "Automotive Technology: A Systems Approach," 4th edition) pages 595-628

Answer questions:

 1. What is the definition for AC voltage?

 2. What is the definition for DC voltage?

 3. Give an example for something that uses AC volts.

 4. Give an example for something that uses DC volts.

 5. Draw an AC wave form.

 6. Draw a DC wave form.

 7. What are the three main functions of the Ignition System?

 8. What year vehicles use standard ignition?

 9. What year vehicles use HEI ignition?

10. What year vehicles use DIS ignition?

11. What was eliminated on the DIS, from the HEI and Std. ignition systems>

12. When spark occurs and the position of the # 1 cylinder piston in relation to crankshaft rotation this is called ______ _________ ___________.

13. When the two timing marks line up this is called, ______ ________ _________.

14. From TDC to the left of engine rotation this called, ________ ______ ________ __________.

15. From TDC to the right of engine rotation this called, ________ ______ ________ __________.

16. The order that each cylinder is fired after the #1 cylinder is called, __________ ___________.

NOTE: change the order for your test.
Edit Section
Materials list

Thomson Delmar Learning, "Automotive Technology: A Systems Approach," 4th edition, pages 597-598.

Hand out from text book

Visual aide for the ignition system

Ignition parts for standard ignition, High energy ignition HEI and DIS.

 

Materials list

  • Thomson Delmar Learning,  "Automotive Technology: A Systems Approach," 4th edition; pages 597-598
  • handout from text book
  • visual aide for the ignition system
  • ignition parts for standerd ignition, High energy ignition HEI and DIS.