Method for controlling a wiper motor
First Claim
1. Method for controlling a wiper motor equipping a wiper device in order to drive at least one wiper blade moving across a windshield according to an alternating path between a first and second end-of-travel positions, characterized by consisting of:
- during a first initialization step (S1-S8), detecting the first and second end-of-travel stops (FdC1, FdC2) such as determined by the construction of the associated wiper device, then determining from these first and second end-of-travel stops first (ZdT1) and second (ZdT2) end-of-travel test zones and in each of the test zones the position (A, B) of a software stop on which the blade changes wiping direction in normal operation;
during a normal operation step;
detecting the position of the wiper blade relative to the first and second end-of-travel test zones, in order to determine the change of wiping direction and realization during at least one passage of the wiper blade in a test zone a variation of the position of its end-of-travel software stop, such that self-adaptation of the wiping limits is produced in time as a function of mechanical use, play and other accidents.
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Accused Products
Abstract
The invention concerns a method for controlling a wiper motor of a wiper device for a motor vehicle windshield. The invention also concerns a control unit implementing the inventive method and a wiper device for a motor vehicle windshield. The invention is characterized in that the control unit (20) produces a control of the electric motor (19) which powers a wiper blade (15) on a windshield sweeping between two end-of-travel zones. In each end-of-travel zone, there is a software end-of-travel stop which is moved by a predetermined value after each passage on the software stop, the latter always remaining in its test zone, thereby providing self-adaptation of the sweeping limits in time. The invention also enables to detect the presence of obstacles on the wiper blade path.
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Citations
15 Claims
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1. Method for controlling a wiper motor equipping a wiper device in order to drive at least one wiper blade moving across a windshield according to an alternating path between a first and second end-of-travel positions, characterized by consisting of:
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during a first initialization step (S1-S8), detecting the first and second end-of-travel stops (FdC1, FdC2) such as determined by the construction of the associated wiper device, then determining from these first and second end-of-travel stops first (ZdT1) and second (ZdT2) end-of-travel test zones and in each of the test zones the position (A, B) of a software stop on which the blade changes wiping direction in normal operation;
during a normal operation step;
detecting the position of the wiper blade relative to the first and second end-of-travel test zones, in order to determine the change of wiping direction and realization during at least one passage of the wiper blade in a test zone a variation of the position of its end-of-travel software stop, such that self-adaptation of the wiping limits is produced in time as a function of mechanical use, play and other accidents. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification