motor and throttle body synchronization unit

Since a small DC motor is used to work as an engine, a special designed DC motor and throttle body synchronization unit must be used. When the throttle is closed, the DC motor runs at idle at the speed of 800 rpm. With gradually opened throttle body, the DC motor speed increases correspondingly until reaches to top speed at 4000 rpm when the throttle is fully open. The following picture shows the DC motor and throttle body synchronization unit. It looks like just the same with the unit we have used for the MAP sensor, but the program and is totally different.

The programming of the DC motor and throttle body synchronization unit is the biggest problem we have ever encountered in the project as well as how to wire the unit into the EFI system. The following two pictures show the programs we wrote for the unit but the DC motor did not synchronize well with the throttle. We wrote over 10 programmes from the unit and tried again and again until it really works well.