How does an automatic mixture control (AMC) adjust the fuel mixture?

The automatic mixture control (AMC) functions by using sealed bellows that respond to variations in temperature and pressure within the engine environment. As the engine operates, these bellows expand or contract based on the ambient conditions and the engine's state. This mechanical action translates into adjustments in the fuel-air mixture being delivered to the engine, ensuring optimal performance by maintaining the appropriate ratio for combustion based on current operating conditions.

While other systems may utilize electronic controls or mechanisms to influence fuel delivery, the key characteristic of AMC is its reliance on the physical properties of the bellows, allowing for real-time adjustments without the need for electronic intervention or direct manual control.