Subject: Reading an Ignition Scope Pattern
Lesson Topic: Peak voltage versus burn time
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Student Performance Objective: By the end of the
lesson: Given information about ignition systems and their related
oscilloscope patterns, each student will be able to compare and contrast an
open spark plug wire with a fouled spark plug using a calibrated piece of
string, with enthusiasm and interest. How will students be evaluated and what methods will be used to measure competency? Students will be given a piece of string and a tack board and asked to illustrate a fouled spark plug and an open plug wire, and asked to support their illustrations with an appropriate written explanation.
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Materials Needed: Overhead, whiteboard, colored dry erase markers, handout, strings, tack boards, and push pins for each student.
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Anticipatory Set
or Mental Readiness: (Describe the introduction to the lesson you will use to
get the students involved in the lesson) If you put one of those big, expensive, yellow ignitions coils on your car, will it give you more power?
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Instructional
Components: (Include type of lesson and major concepts to be covered) Cover coil
output versus spark demand Using the string, the students will show peak voltage versus burn time, illustrating open wire consequences and fouled plug consequences.
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Check for Understanding and/or Guided Practice and Independent Practice: Reiterate the effect of
high resistance versus low resistance on the shape of the waveform. |
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Closure: ("Are there any questions?" is NOT an adequate closure) Ask again the question regarding the expensive yellow coil. |
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Assessment Tool: (Written test, skill performance, scenario, portfolio, discussion, etc.) Combination tack board and string with labels plus an essay type question |