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US 7,069,904 B2Granted
Method for regulating the speed of an internal combustion engine
AssigneeMTU Friedrichshafen GmbH
InventorArmin Dolker
Life of this patent
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Abstract
A method for regulating the speed of an internal combustion engine. According to the invention, a second regulation difference (dR2) is calculated by a second filter in the event of dynamic changes of state. In this way, in the event of dynamic changes of state, a speed regulator defines a power-determining signal (ve) according to a first regulation difference (dR1) and the second regulation difference (dR2). The inventive method thus increases the dynamics of the control loop.
Claims10
A method for closed-loop speed control of an internal combustion engine, comprising the steps of:
- computing a first filtered actual speed (nM1(IST)) from an actual speed (nM(IST)) of the internal combustion engine by means of a first filter;
- computing a first control deviation (dR1) from a set speed (nM(SL)) of the internal combustion engine and the first filtered actual speed (nM1(IST));
- determining a power-determining signal (ve) for automatically controlling the speed of the internal combustion engine from the first control deviation (dR1) by means of a speed controller;
- computing a second filtered actual speed (nM2(IST)) from the actual speed (nM(IST)) of the internal combustion engine by means of a second filter;
- computing a second control deviation (dR2) from the set speed (nM(SL)) and the second filtered actual speed (nM2(IST));
- and, when a dynamic change of state occurs, determining the power-determining signal (ve) for the closed-loop speed control of the internal combustion engine with the speed controller from the first control deviation (dR1) and the second control deviation (dR2).
3 more elements
Dependencies are inferred from the claim text.