Control device and method for operating a window wiper apparatus with operating-point-dependent wiping angle adaptation
AssigneeRobert Bosch GmbH
InventorsJohannes Moosmann, Hartmut Krueger
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Abstract
The control device for a wiper device of a window wiper apparatus, especially of a motor vehicle, adapts set values of the wiping angle of the wiper arm to an actually measured operating point of the wiper arm during each wiper cycle. Because of that adaptation both over-wiping and also too little wiping of a wiped area by the wiper device is at least reduced so that the wiper accuracy particularly at the turning points of the wiper arm is improved. Furthermore a method for adjusting of a set value of the wiping angle of a wiper arm of a wiper device to actually existing operating conditions or to an actual operating point is provided.
Claims27
A control device for a wiper device (10) of a window wiper apparatus (2), said control device (1) comprising means for controlling a cyclic oscillation of at least one wiper arm (5) of the wiper device (10) over a wiping angle (α) defined by two turning points (O, U), wherein the control device (1) performs an adjustment of a set value of the wiping angle (α) to changing operating conditions by means of a monitoring-assisted process.
The control device as defined in claim 6, wherein the perturbation model is described by the following equation (2):
- xS=ASxS, z=CSxS (3),
- wherein AS is a dynamic matrix of the perturbation model (7), CS is an output matrix of the perturbation model (7) and z is the perturbing variable.
A window wiper apparatus comprising
- a wiper device (10) including at least one wiper arm (5) and at least one motor (3) for driving said at least one wiper arm (5) with a cyclic oscillation over a wiping angle (α) defined by two turning points (O, U);
- and
- a control device (1) comprising means for controlling said cyclic oscillation of said at least one wiper arm (5) according to set values (O, U) of said turning points, wherein the control device (1) includes means for adaptation of said set values of said turning points to changing operating conditions by means of a monitoring-assisted process;
- whereby accuracy of said wiping angle in successive cycles during driving of said at least one wiper arm is at least improved despite the changing operating conditions.
A method of controlling a wiper device (10) of a window wiper apparatus (2), said method comprising controlling oscillations of at least one wiper arm (5) of the wiper device (10) so that the oscillations are kept within a wiping angle (α) defined by two set values (O, U) for turning points of the at least one wiper arm, wherein the method adjusts a set value of the wiping angle (α) to changing operating conditions by means of a monitoring-assisted process.
Dependencies are inferred from the claim text.