Regulating device for an actuator
AssigneeRobert Bosch GmbH
InventorMichael Nau
Life of this patent
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Abstract
The invention relates to a regulating device for an actuator arranged in a gas passageway of an internal combustion engine, in particular for a bypass flap arranged in an exhaust turbocharger, having an electrical servomotor, a regulating member coupled to the actuator and a multi-gear transmission arranged between the servomotor and regulating member. According to the invention, to achieve a large transmission ratio range with a small number of transmission gears, two transmission wheels interact in at least one of the transmission gears via an evoloid toothing.
Claims5
A regulating device for an actuator disposed in a gas passageway of an internal combustion engine and configured to regulate a bypass flap disposed in an exhaust turbocharger, comprising:
- an electric servomotor;
- a regulating shaft coupled to the actuator;
- and
- a multi-gear transmission disposed between the servomotor and the regulating shaft, the multi-gear transmission including only two transmission gear stages with at least one of the transmission gear stages including two transmission wheels that cooperate via an evoloid toothing,
- wherein one of the two transmission wheels is a pinion with evoloid teeth that is seated on a driven shaft of the servomotor in a manner fixed against relative rotation, and a second of the two transmission wheels is a rotatably supported spur wheel with evoloid teeth that are chamfered toward its axis,
- wherein the transmission gear stage with evoloid toothing forms an input transmission gear stage driven by the driven shaft of the servomotor, and
- wherein the other of the transmission gear stages is configured as a nonlinear further transmission gear stage that forms an output transmission gear stage that drives the regulating shaft.
Dependencies are inferred from the claim text.