The Electronic Control Unit for Production Electronic Fuel Injection Systems

This paper presents a functional description of the 1975 production Electronic Fuel Injection system, relating system performance to automobile performance requirements. It addresses in particular the architecture and physical design of the heart of the system, the Electronic Control Unit (ECU). Accuracy requirements and environmental and durability constraints imposed on ECU design are discussed.

The extensive on-line testing that must be performed to ensure necessary levels of accuracy on a cost-effective basis and at throughput rates consistent with automotive production scheduling is shown to have presented a major manufacturing challenge. Design modifications expected to result from present and anticipated technological advances are overviewed.