The Systems Approach to Control and Instrumentation Generally speaking, electronic systems function to control, measure, or communicate. Automotive electronic systems fall generally into these same three application areas. The major categories of automotive electronic systems include 1. Engine/power train control 2. Ride/handling control 3. Cruise control 4. Braking/traction control 5. Instrumentation (instrument panel) 6. Power steering control 7. Occupant protection 8. Entertainment 9. Comfort control 10. Cellular phones Historically, automotive electronics was confined primarily to communications, with the incorporation of AM radios and police-car two-way radio systems. These remained the only significant electronics applications throughout the 1930s and 1940s | THE SYSTEMS APPROACH TO CONTROL AND INSTRUMENTATION 2 http The Systems Approach to Control and Instrumentation Generally speaking electronic systems function to control measure or communicate. Automotive electronic systems fall generally into these same three application areas. The major categories of automotive electronic systems include 1. Engine power train control 2. Ride handling control 3. Cruise control 4. Braking traction control 5. Instrumentation instrument panel 6. Power steering control 7. Occupant protection 8. Entertainment 9. Comfort control 10. Cellular phones Historically automotive electronics was confined primarily to communications with the incorporation of AM radios and police-car two-way radio systems. These remained the only significant electronics applications throughout the 1930s and 1940s. This was an era in which vacuum tubes were the only important active electronic devices. The development of solid-state electronics beginning with the transistor in the late 1940s and evolving through high-performance integrated circuits provided a technology that was compatible with the evolution of other automotive electronic systems such as ignition systems turn signals instrumentation and a variety of other automotive subsystems. Perhaps the biggest evolutionary jump occurred in the 1970s with the advent of electronic fuel control systems a step motivated primarily by government regulations as we will show later . Since then the evolution of electronic systems in automobiles has seen spectacular growth such that automotive electronics is now estimated to account for 10 to 25 of the cost of the vehicle depending on feature content. CHAPTER OVERVIEW This book will discuss the application of electronics in automobiles from the standpoint of electronic systems and subsystems. In a sense the systems approach to describing automotive electronics is a way of organizing 41 UNDERSTANDING AUTOMOTIVE ELECTRONICS 29 THE SYSTEMS APPROACH TO CONTROL AND
