APPARATUS AND METHOD FOR CONTROLLING THE SPEED OF AN INTERNAL COMBUSTION ENGINE
First Claim
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1. A method of controlling the speed of an internal combustion engine, comprising steps of:
- measuring speed of the internal combustion engine and forming a control signal as a response to the measurement and a set speed reference value,characterized in that the method also comprises a step of forming an internal speed reference value by utilizing control signal data, for using in place of the set speed reference value when forming the control signal, the step of forming the internal speed reference value comprising a function for reducing effect of the set reference value in the internal speed reference value by subtracting from the set reference value a certain subtraction part that depends on the value of the control signal by certain criteria.
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Abstract
The apparatus according to the invention comprises a controller for forming a speed signal arranged to receive speed measurement data of the internal combustion engine as well as speed reference data. The apparatus additionally comprises a module for forming the internal speed reference value instead of the speed reference value set to be used when forming the control signal.
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Citations
8 Claims
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1. A method of controlling the speed of an internal combustion engine, comprising steps of:
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measuring speed of the internal combustion engine and forming a control signal as a response to the measurement and a set speed reference value, characterized in that the method also comprises a step of forming an internal speed reference value by utilizing control signal data, for using in place of the set speed reference value when forming the control signal, the step of forming the internal speed reference value comprising a function for reducing effect of the set reference value in the internal speed reference value by subtracting from the set reference value a certain subtraction part that depends on the value of the control signal by certain criteria. - View Dependent Claims (2, 3)
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- 4. An apparatus for controlling speed of an internal combustion engine, the apparatus comprising a controller for forming a control signal, the controller being arranged to receive speed data of the internal combustion engine and which has a set speed reference value, characterized in that the apparatus also comprises a module for forming an internal speed reference value for using in place of the set speed reference value when forming the control signal, the module being arranged to use the set speed reference value and the control signal value for forming the internal speed reference value, the module comprising a submodule for reducing effect of the set reference value in the internal speed reference value, the submodule being arranged to subtract a certain subtraction part of the set reference value, the part being dependent on the value of the control signal under certain criteria.
Specification