Device for working a throttle valve

The device has an actuator such as a throttle grip (102), at least one choke flap coupled to it and pivotable through an actuating angle and a mechanical conversion device (100) in the transmission path between the actuating device and the choke flap(s) for producing a progressive transmission ratio, at least in a lower load region. The mechanical conversion device contains a lifting element (114) joined to the choke flap and a cam plate (108) that interacts with it and that is operated by the actuating device..