What is the purpose of the ERJ's auto-throttle system?

The purpose of the ERJ's auto-throttle system is to maintain target airspeed by adjusting engine thrust. This system plays a critical role in flight operations by automatically managing engine thrust to keep the aircraft at a desired speed, which is especially important during phases of flight such as climb, cruise, and descent.

By maintaining the target airspeed, the auto-throttle helps enhance flight safety and efficiency, allowing the pilots to focus on other essential tasks without constantly needing to monitor and adjust engine power. The system contributes to smoother and more stable flight performance, which is vital in various operating scenarios.

While it is true that aspects like fuel efficiency can be indirectly affected through the efficient management of thrust, the primary function of the auto-throttle is specifically centered on maintaining speed rather than directly increasing fuel efficiency or serving other functions like adjusting cabin temperature.