THROTTLE ACTUATOR AND CONTROL SYSTEM

摘要

An actuator (1-21) for the throttle (2) of an internal combustion engine comprises a torque motor (3) and a return spring (19). The spring (19) provides a monotonically increasing return force for increasing throttle opening. The motor (2) has a torque characteristic such that, for constant motor current, the torque decreases monotonically for increasing throttle opening. The actuator (1-21) thus has a single-valued function of throttle position versus motor current and allows open loop control as well as stable closed loop control.