The Engine Control Unit Improvement for Air- Mixture Control and Engine Power Development

This paper is devoted to the design and reengineering of the electronic engine control unit to increase engine power. An electronic engine control unit (ECU) calculates fuel quantity according to the different sensors data and keeps air/fuel mixture value of 14.7:1. This mixture value means that in order to burn completely 1 kg of fuel we need 14.7 kg of air. Fuel is delivered to the engine by a fuel pump. ECU opens fuel injectors for short periods of time depending on current engine speed and throttle position or load. These time periods form a fuel map that is stored in ECU internal memory and in most cases couldn’t be edited. It is proposed to develop a memory extension board for the RB25DET engine control unit which should contain a parallel memory with the smallest access time and a fast microcontroller with hardware USB support to program memory and the real- time observing the engine control system.