Position and/or angle control method and device without absolute positions sensor
First Claim
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1. A method for control of a positioning device of a motor vehicle without an absolute position sensor, the positioning device having a controllable part with at least one known position for maintaining the positioning device in a desired state, the method comprising the steps of:
- initializing the positioning device after termination of operation of the motor vehicle by moving the positioning device precisely to the at least one known position;
storing the at least one known position of the position device as a reference value via an electronic circuit; and
maintaining the reference value even when an ignition of the motor vehicle is turned shut off so that the reference value can be used when starting the motor vehicle.
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Abstract
A method for control of a positioning and/or angle control device without an absolute position sensor and the device itself is proposed as having at least one position label for a controllable part in a motor vehicle using an electronic circuit. The positioning and/or angle control device initialized after termination of the operation of the motor vehicle.
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Citations
20 Claims
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1. A method for control of a positioning device of a motor vehicle without an absolute position sensor, the positioning device having a controllable part with at least one known position for maintaining the positioning device in a desired state, the method comprising the steps of:
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initializing the positioning device after termination of operation of the motor vehicle by moving the positioning device precisely to the at least one known position;
storing the at least one known position of the position device as a reference value via an electronic circuit; and
maintaining the reference value even when an ignition of the motor vehicle is turned shut off so that the reference value can be used when starting the motor vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
checking, upon starting the motor vehicle, whether the stored reference value is one of valid and void;
accounting for any restriction on the controllable part when initializing the position device;
checking to ensure that no hydraulic pressure is acting on the controllable part; and
checking to ensure that no external power is acting on the controllable part.
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3. The method according to claim 2 further comprising the step, upon starting the motor vehicle and determining that the stored reference value is void, performing a new initialization of the positioning device.
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4. The method according to claim 2 further comprising the steps of:
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preventing an undesired reaction of the controllable part due to the any restriction during initialization via a controller device;
preventing an undesired action of the initializing on the controllable part via the controller device; and
verifying whether the conditions for performing the initialization have occurred by comparing a number of revolutions in the controllable part with a limit value, whereby the initialization is complete.
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5. The method according to claim 4 further comprising the step of deactivating the controller device after the termination of the initialization.
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6. The method according to claim 5 further comprising the step of verifying whether the conditions for performing the initialization have occurred by comparing a number of revolutions of a component connected to the controllable part with a limit value.
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7. The method according to claim 6 further comprising the step of verifying whether the conditions for performing the initialization have occurred by comparing a measured parameter of a component unconnected to the controllable part with a limit value.
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8. The method according to claim 7 further comprising the step of, after activation of the controller device, allowing a desired time period of time to elapse for preventing an undesired reaction of the controllable part.
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9. The method according to claim 8 further comprising the step of performing the initializing only in the event that at least one of the following occurs:
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the controller device for preventing the undesired reaction of the controllable part is activated; and
detection of the conditions for performing the initialization have occurred.
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10. The method according to claim 9 further comprising the step of, after disconnecting the ignition via the electronic control circuit, determining whether the controllable part is still supplied with an adjusting energy.
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11. The method according to claim 10 further comprising the step of detecting incorrect position information by evaluating a measured parameter of at least one of the controllable part and the motor vehicle.
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12. The method according to claim 11 further comprising the step of feeding, to the electronic circuit as measured parameters, at least one of a number of revolutions of a motor connected with a transmission, a load adjustment of the motor vehicle, a selector lever position of a transmission, and a torque developed by the motor.
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13. The method according to claim 12 further comprising the step of, during the initializing, accounting for detection of several starting tests of the motor vehicle.
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14. A method for control of a stepper motor of a motor vehicle without an absolute position sensor, the stepper motor being coupled to a reduction ratio control device of the drive train of the motor vehicle and the stepper motor having a rotor having at least one known position, the method comprising the steps of:
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feeding at least one process parameter from the drive train of the motor vehicle to an electronic circuit connected to the stepper motor to facilitate control of the stepper motor;
continuously storing in the electronic circuit actual position values of the rotor and selected values of the reduction ratio control device controlled by the stepper motor;
establishing whether a stored position value in the electronic circuit is valid;
monitoring at least one function of the reduction ratio control device with the electronic circuit and optionally deactivating at least one selected function; and
comparing with the electronic circuit an actual state of the reduction ratio control device with an appertaining set state and, in case predetermined difference between the actual state and the appertaining set state occurs, producing control signals for controlling reduction ratio control device.
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15. A control apparatus for a positioning device controlling a reduction ratio control apparatus in a motor vehicle without an absolute position sensor, the positioning device having at least one known position for a controllable part, the control apparatus having an electronic circuit comprising:
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a storage element in which are continuously stored actual values of a position of the positioning device and selected values of the continuously variable toroidal drive during a preset period of time;
a validity device for establishing the validity of values stored in the storage element;
a controller device for controlling the controllable part;
a monitoring device for monitoring desired functions of the continuously variable toroidal drive;
a comparator which compares an actual state of the continuously variable toroidal drive with a relative set state and if preset difference values between the actual state and the set state are exceeded, the comparator produces control signals for the controllable part of the positioning device to appropriately affect the state of the continuously variable toroidal drive; and
communication means enabling the storage element, validity device, controller device, monitoring device, and comparator to communicate with each other. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification