What type of actuator is used on electronically controlled suspensions?

Electronically controlled suspensions utilize actuators that can respond to real-time driving conditions and driver inputs to adjust the stiffness or responsiveness of the suspension system. Both solenoids and electric motors can serve this purpose depending on the specific design of the suspension system.

Solenoids are commonly used to control valves that manage hydraulic fluid flow within the suspension system, allowing for adjustments in damping characteristics. On the other hand, electric motors might be employed to directly adjust components such as adjustable struts or air springs in response to electronic control commands.

Therefore, the correct answer indicates that either type of actuator — solenoids for managing fluid dynamics or electric motors for mechanical adjustments — can be integral to electronically controlled suspensions, making both options viable. This versatility is key in modern suspension systems that aim to provide enhanced vehicle stability, comfort, and performance under various driving conditions.