Closed loop electronic engine control system - has amplifier generating signal representing difference between first and reference signal

摘要

The closed-loop electronic control system regulates the proportions of the fuel/air mixture delivered to an automotive engine, having a sensor in the exhaust with two outputs, generating a signal representing the concentration of an exhaust gas ingredient. The sensor is connected to a first differential amplifier supplying a signal generator regulating the proportions of fuel and air fed to the engine. The first differential amplifier (4a) has both inputs (10, 10') connected to the outputs (20, 21) of the sensor (3). A second differential amplifier (4b) is connected to the first and receives its signal, generating a signal representing the difference between this signal and a reference signal.