Lesson Plan Industry Sector
Transportation

## Fuel Injectors (Animation) (updated) by John Potter

### Lesson Plan Overview / Details

This lesson covers how fuel injectors deliver fuel in different modes: Sequential and Simultaneous. It is designed to get the students to think about why we have both and which ones can be mechanical, electronic, and computer, using animation and lab displays.

Two Periods
120 Minutes

### Objectives and Goals

• The objective of this lesson is to show the difference in types of injection system using animation.
• The students will demonstrate the difference between Sequential and Simultaneous injection systems.
• Students will dentify which is better and why and can they be both used on the same vehicle. (Is it always electric or is any of it used on mechanical systems?)

### Activities in this Lesson

• As the students enter the class, they get into their assigned groups. One member from each group will get their group binder from the bookcase. After bringing it to their group it will be opened and the note pages will be taken out that were given to them the preceding day for this activity. I give out the next day’s activity at the end of each day so the students know what they are going to learn the next day. No Surprises!

• Video Clips - Demo / Modeling

As I play the simultaneous video clip on the overhead, I ask the students, "Is it simultaneous, or sequential?" Then I play Simultaneous 2, which gives the answer Simultaneous.

I then ask, "Can it be mechanical, electrical, or both?" Answer: All three. I give examples (VW or L Jetronic) which is Mechanical. Early Fuel Management System which is Electrical. Late model cars use Computers.

I then play the video Sequential 1 asking the question, "Is it simultaneous or sequential?" I then play sequential 2 which has the answer.

I ask the students which system is on late model cars. After the students give their reply, I answer, "Both."

For starting the car when cold the computer turns on all injectors for a rich mixture. Then it goes into closed loop and runs sequential for better gas mileage and best performance when road conditions, temperature, air pressure and volume.etc. Then it goes back into simultaneous mode for power or heavy load. Example: pulling a grade. At this time I pass out some of the injection systems and related parts.  We will have an open discussion on until six minutes before the end of class.

• After giving them time to discuss among themselves, each group will write down a summary of today's lesson and have them available to myself as I walk around the class and mark in their binder (5 points maximum for this activity). If the group gets low points, they will have time to redo their notes for a higher score at a later date.

• Review - Closure

I do a quick review of today’s activity and the introduction of the next assignment which is going to the display bench and labeling the different types of injection systems I have on display. I pass out the Fuel Injection 9 Work sheets for this assignment to be put into the student’s group binder. When this is done the students put their binder back on the bookcase. This way the students already know what they are going to learn when they come to class. I tell them that they will be able to bring there car in and find the type of injection system they have.

### Assessment

Assessment Types:
Journals,

Once I have finished, I give them time to discuss among themselves. Each group will write down a summary of today's lesson and have them available to myself as I walk around the class and mark in their binder points this activity (5 points max). If the group gets low points, they will have time to redo their notes for a higher score at a later date.