Driving control apparatus for motion mechanism and control method of driving control apparatus
First Claim
Patent Images
1. A driving control apparatus for a motion mechanism, comprising:
- a motion mechanism configured to vary an operation characteristic of an engine valve, said motion mechanism being disposed in an engine;
a motor configured to operate said motion mechanism;
a drive circuit configured to drive said motor; and
a control unit configured to;
output a control signal to said drive circuit;
detect whether or not said motion mechanism is malfunctioning;
stop outputting the control signal to said drive circuit when it is detected that said motion mechanism is malfunctioning;
determine that said drive circuit is malfunctioning when a current of said motor is equal to or larger than a predetermined value after output of said control signal is stopped; and
stop power supplied to said drive circuit when it is determined that said drive circuit is malfunctioning.
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Accused Products
Abstract
When a variable valve mechanism which varies an opening characteristic of an engine valve is malfunctioned, the power supply to a drive circuit for the variable valve mechanism is stopped, and also a control signal to the drive circuit is cleared.
34 Citations
6 Claims
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1. A driving control apparatus for a motion mechanism, comprising:
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a motion mechanism configured to vary an operation characteristic of an engine valve, said motion mechanism being disposed in an engine; a motor configured to operate said motion mechanism; a drive circuit configured to drive said motor; and a control unit configured to; output a control signal to said drive circuit; detect whether or not said motion mechanism is malfunctioning; stop outputting the control signal to said drive circuit when it is detected that said motion mechanism is malfunctioning; determine that said drive circuit is malfunctioning when a current of said motor is equal to or larger than a predetermined value after output of said control signal is stopped; and stop power supplied to said drive circuit when it is determined that said drive circuit is malfunctioning. - View Dependent Claims (2, 3, 4)
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5. A control method of a driving apparatus for a motion mechanism, said apparatus being provided with:
- a motion mechanism configured to vary an operation characteristic of an engine valve, said motion mechanism being disposed in an engine;
a motor configured to operate said motion mechanism; and
a drive circuit configured to drive said motor by inputting a control signal, the control method comprising the steps of;detecting whether or not said motion mechanism is malfunctioning; stopping outputting of the control signal to said drive circuit when it is detected that said motion mechanism is malfunctioning; determining that said drive circuit is malfunctioning when a current of said motor is equal to or larger than a predetermined value after output of said control signal is stopped; and stopping power supplied to said drive circuit when it is determined that said drive circuit is malfunctioning.
- a motion mechanism configured to vary an operation characteristic of an engine valve, said motion mechanism being disposed in an engine;
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6. A driving control apparatus for a motion mechanism, comprising:
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a motion mechanism configured to vary an operation characteristic of an engine valve, said motion mechanism being disposed in an engine; a motor that operates said motion mechanism; a drive circuit that drives said motor; control means for outputting a control signal to said drive circuit; detecting means for detecting whether or not said motion mechanism is malfunctioning; a first stopping means for stopping outputting of the control signal to said drive circuit when it is detected that said motion mechanism is malfunctioning; a determining means for determining that said drive circuit is malfunctioning when a current of said motor is equal to or larger than a predetermined value after output of said control signal is stopped; and a second stopping means for stopping power supplied to said drive circuit when it is determined that said drive circuit is malfunctioning.
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Specification