Invention Grant
- Patent Title: Method for controlling the limiting of the rotational speed of a combustion engine
- Patent Title (中): 用于控制内燃机的转速限制的方法
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Application No.: US13362128Application Date: 2012-01-31
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Publication No.: US09103289B2Publication Date: 2015-08-11
- Inventor: Fabian Gwosdz , Claus Naegele
- Applicant: Fabian Gwosdz , Claus Naegele
- Applicant Address: DE Waiblingen
- Assignee: Andreas Stihl AG & Co. KG
- Current Assignee: Andreas Stihl AG & Co. KG
- Current Assignee Address: DE Waiblingen
- Agency: Walter Ottesen P.A.
- Priority: DE102011010069 20110201
- Main IPC: E21B4/04
- IPC: E21B4/04 ; F02P5/145 ; F02D31/00 ; F02B63/02

Abstract:
A method controls the rotational speed limiting of an engine in a handheld work apparatus. The crankshaft of the engine drives a worktool via a clutch which engages in dependence on the motor rotational speed. Above an engaging speed of the clutch, a drive connection with the crankshaft is made and below the engaging speed, the drive connection is interrupted. A speed control unit monitors the rotational speed of the engine and includes a rotational speed lock circuit which limits the speed to a limit below the engaging speed. During the start of the engine, the lock circuit is switched on; it is switched off after the engine has been taken into operation when a deactivation signal is present, wherein the deactivation signal is generated when an operation change signal of the work apparatus is detected.
Public/Granted literature
- US20120193112A1 METHOD FOR CONTROLLING THE LIMITING OF THE ROTATIONAL SPEED OF A COMBUSTION ENGINE Public/Granted day:2012-08-02
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