FuelInjectorTester

An Arduino-based device used to control fuel injectors for testing purposes.

Background Information

• Injector injects onces per two turns of the engine

Compiling the Code

• Get the Arduino IDE (https://www.arduino.cc/en/Main/OldSoftwareReleases)
• Unzip all dependencies (located in the 'Dependencies' folder) into the Arduino 'libraries' folder. The Arduino 'libraries' folder is located in the following locations (platform dependent):
  • (Windows) C:\Users{User}\Documents\Arduino\libraries
  • (Unix) ~/sketchbook/libraries
• Open the 'FuelInjectorTester.ino' file using the Arduino IDE
• Click the button with a checkmark (top-left corner) to compile the code.

Uploading Code to Arduino

Requirements

• Support 4, 6, or 8 injectors
• LED lights that light up with fuel injectors
• Be able to adjust the following:
  • Number of injectors (4, 6 or 8)
  • Injection Time
  • RPM
  • Length of time the test will run
• Support different modes
  • Each mode should have configuration screen and running screen
  • Modes:
    • Testing
      • Injection Time: Range from 2 - 12 ms
      • RPM: range from 0 - 8000, increments of 100
    • Cleaning
      • Injection Time should range from 5 - 20 seconds, increments of 5
      • RPM: Range from 1 - 200 (use knob), increments of 1

Problems

• If printing to LCD screen every frame, digital output to pins other than 13 does not work.
  • Possible Solution: Only drive the fuel injectors when in DRIVE_INJECTORS mode. In this mode, the UI is not updated. After exiting this mode, the UI will become responsive again.

Express PCB Plus Grid Layout:

Grid: 2.5 mm Snap: 0.25 mm

Open questions

• Does simulating the firing order really matter?
  • Downside: Requires extra logic in the code