Which of the following configurations is considered most common in modern engine-control systems?

In modern engine-control systems, the two-wire configuration is often chosen for its simplicity and effectiveness in various applications. This configuration generally consists of a power wire and a ground wire. It is widely used because it can effectively transmit power and signals while maintaining a straightforward design, minimizing the amount of wiring needed.

Two-wire systems can be seen in various sensor applications that require a minimal number of conductors while still providing reliable communication between the engine control unit (ECU) and sensors or actuators. This design allows for improved efficiency in data transmission and reduced installation complexity, making it highly favored in contemporary automotive engineering.

While other configurations like single-wire, three-wire, and four-wire systems may offer additional functionalities or be suited for specific applications, the two-wire configuration stands out for its balance of simplicity, reliability, and efficiency in modern engine-control systems.