Two electronic throttler controllers were designed and implemented for an automotive throttle valve on a four-cylinder, spark-ignition gasoline engine. The first controller was designed using operational amplifiers and other analog componentry to realize a proportional-integral controller and feedback loop. The second controller utilized a programmable digital microcontroller to replace the analog component for signal processing. The use of analog to digital signal conversion by the microcontroller allows for the simple implementation of control logic and feedback loops through programming.
This study shows that rapid controller prototyping can be accomplished by using an inexpensive microcontroller for signal processing. This design concept greatly decreases implementation time and performance optimization time, increases controller flexibility and capabilities, and maintains favorable response characteristics.
Author:- Martins, Tomás V