Automotive General Services Technician Model

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Lesson Plan Industry Sector
Transportation

Lesson Plan Originally Created By: Richard Williams

**Introduction to the Exhaust Gas Recycling Valve and Systems (updated) by Richard Williams

Part of Unit: Engine Performance

Lesson Plan Overview / Details

This lesson is intended to introduce the automotive students to the purpose, function, evolution, and proper testing of the common automotive EGR valve and activation systems.

Lesson Time

Hook Set/Opening Question
15 Minutes
Lecture
90 Minutes
Demonstration
30 Minutes
Lab
120 Minutes
Closure
30 Minutes

Objectives and Goals

  • The students will receive a lecture and demonstration on the EGR valve and then practice, in a group environment, what they have learned.
  • In addition, the student will practice all safety procedures noted.
  • In conclusion, the students will meet in a classroom environment to discuss what they have learned and experienced.

Activities in this Lesson

  • Opening Question - Hooks / Set

    When students enter the room they will see this question on the whiteboard:

    What is smog?

    I will also a picture of the LA skyline projected on the screen.

    I'll take care of roll and other required housekeeping tasks and then take answers from the students. Eventually we someone will refer to the brown stuff in the air. At that point I will inform them that NOx, sunlight and a little HC makes the "Brown Stuff" or what we refer to photo chemical smog.

  • Classroom Power Point - Lecture

    I start my Power Point which covers the theory, purpose, function, evolution, and proper testing of the common automotive EGR valve and activation systems. The students are are encourged to take and may download and utilize the ppt. notes pages I have posted on the school web site. I also have a video camera set up to show EGR components and demonstrate vacuum testing of diaphragm.

  • Demonstration of EGR Testing - Demo / Modeling

    I now have the students watch me in the shop demonstrating how to properly test and EGR valve, ports, vacuum supply and activation system on a Ford vehicle with Pressure Feedback Sensor, GM vehicles with electronic and Backpressure Diaphragm EGR and a Toyota EGR valve with a Backpressure Transducer. 

  • Lab - Lab / Shop

    The students are assigned to a group (no more than three to a group) and given several lab sheets to complete on selected vehicles in the shop. They will be required to wear their safety glasses and practice all relevant safety measures. While they are doing this I will wander from group to group to monitor and assess  their learning by asking questions and observing their actions.

  • Review Findings - Closure

    I now bring the students back into the classroom and bring up selected slides (the slides I bring up depends on my conclusions derived from questioning the students) and we discuss what we found. During this activity I try to get the students to answer their own questions. For example, one student may ask, “Why dosent the diaphragm move when I apply vacuum?” I’ll ask the whole class if anyone can answer the question. If no one speaks, I'll review a slide that shows the how to identify what type of EGR valve they are working on and then slides that show proper testing for that valve and system. If a student volunteers to answer I’ll listen to their explanation and try to find slides to support them and help them fill in the gaps.

Assessment

Assessment Types:
Demonstrations, Interviews, Teacher-Made Test, Observations,
Assessment Types:
Demonstrations, Interviews, Teacher-Made Test, Observations,

While the students are working, I’m visiting each group of students (2 to 3) questioning them, sometimes individually & sometimes as a group. I vary the questions such as:

1. What is this component?

2. Where is this component?

3. How does the component work?

4. What temperature should it be here?

Eventually there will be questions regarding this material on a written examination