A method for washing a window of a vehicle, using at least one wiper blade member and a liquid projector that projects liquid for washing the window onto a wiping surface has a first wiping cycle including a first step of actuating the wiper blade member to move over the window in a first direction from a first starting position to a wiping end position, while projecting the liquid onto the wiping surface, and a second step of actuating the wiper blade member to move over the window in a second direction opposite the first direction from the wiping end position to the first starting position, and a second wiping cycle including a third step of actuating the wiper blade member to move over the window in the first direction from the first starting position to the wiping end position, while projecting the liquid onto the wiping surface.

A wiper control device that includes: a current detection section that detects a flow of current through a coil of a wiper motor; an environmental information acquisition section that acquires a vehicle speed or a vehicle external air temperature as environmental information; and a control section that controls a drive circuit such that a torque of an output shaft that is estimated from the current detected by the current detection section becomes equal to or less than a base limit torque that corresponds to a rotation angle detected by a rotation angle detection section, and such that a torque of the output shaft becomes equal to or less than a base limit torque that is corrected according to environmental information acquired by the environmental information acquisition section.

A wiper control device that includes: a current detection section that detects a flow of current through a coil of a wiper motor; an environmental information acquisition section that acquires a vehicle speed or a vehicle external air temperature as environmental information; and a control section that controls a drive circuit such that a torque of an output shaft that is estimated from the current detected by the current detection section becomes equal to or less than a base limit torque that corresponds to a rotation angle detected by a rotation angle detection section, and such that a torque of the output shaft becomes equal to or less than a base limit torque that is corrected according to environmental information acquired by the environmental information acquisition section.

A wiper device that includes: a first control section that, during intermittent operation, controls power supply to a drive source such that a wiper blade wipes to-and-fro between a first return position and a second return position on a windshield and stops moving for a predetermined duration at the first return position, and that performs position retention control that controls power supply to the drive source such that the stopped wiper blade is retained at a position at which the wiper blade is stopped; and a second control section that suspends the position retention control by the first control section in a case in which a current flowing in the drive source is detected to have increased by a predetermined value or greater while the wiper blade moves toward the first return position within a predetermined region in a vicinity of the first return position.

Since a shape of a stator 44 is made mirror symmetric with respect to a rotor 45 as a 4-pole/6-slot type, rotational deflection of the rotor 45 can be suppressed. As the minimum number of poles and the minimum number of slots, which can suppress the rotational deflection of the rotor 45, a frequency of magnetic noises approaches a frequency of mechanical noises. Thus, it is possible to integrate the whole noises generated by the DR-side wiper motor 21 into a low frequency range thereof, and to make the acoustic sensitivity (dB) of a vehicle interior smaller. Since the stator 44 is fixed inside a housing 40 and mounting legs fixed to a vehicle body fixed portion are provided in the housing 40, the stator 40, which is a source of the magnetic noises, can be fixed to a vehicle via only the housing 40. Therefore, a brushless wiper motor with quietness improved further can be designed.

The present invention relates to a windscreen wiping device (100) for a vehicle, comprising a wiper blade (2) with an elongate upper part (10) and an elongate lower part (12), which are configured to be at least partially bendable. Furthermore, a plurality of connecting elements (18) for connecting the upper part (10) and the lower part (12) are provided, said connecting elements being spaced apart from one another along a longitudinal extent (8) of the wiper blade (2) and being designed to permit a movement of the upper part (10) and of the lower part relative to each other with a movement component along a longitudinal extent (8) of the wiper blade (2). Furthermore, a multiplicity of the plurality of connecting elements (18) are connected to the upper part (10) via a first film hinge in each case and to the lower part (12) via a second film hinge in each case. Furthermore, a film-hinge stop device is provided in order to limit a rotational movement of the connecting elements (18) relative to at least one part from the elongate upper part and the elongate lower part.

A brushless direct current electric motor for a wiping system. The brushless direct current electric motor includes a rotor, a stator, a Hall effect sensor to detect control magnet angular position of the rotor, and a control unit to determine rotor angular positions in relation to the stator from the signals Hall effect sensor signals and to generate control signals to electromagnetic excitation coils of the rotor as a function of the determined angular position of the rotor. The control unit includes a clock configured to: estimate the angular position of the rotor at predetermined instants lying between two changes of state of the Hall effect sensor, determine values of the control voltages associated with the angular positions of the rotor estimated for the predetermined instants, and generate a substantially sinusoidal control signal from the determined voltage values.

An electromagnetic wiper system for a windshield of a vehicle includes a linear actuator, a wiper-arrangement, and control circuitry. The linear actuator includes at least one guide rail having permanent magnets and an electromagnetic moving block. The electromagnetic moving block includes at least one perforation that surrounds the at least one guide rail and at least one electromagnetic coil that surrounds the at least one perforation. The wiper-arrangement includes a wiper arm and a wiper blade, wherein at least the wiper arm is coupled to the electromagnetic moving block. The control circuitry controls a linear motion of the electromagnetic moving block along the at least one guide rail to steer the wiper arm that is coupled to the electromagnetic moving block back and forth across a length of the windshield to the windshield, wherein the electromagnetic moving block induces minimal friction during the linear motion.

An electromagnetic wiper system for a windshield of a vehicle includes a linear actuator, a wiper-arrangement, and control circuitry. The linear actuator includes at least one guide rail having permanent magnets and an electromagnetic moving block. The electromagnetic moving block includes at least one perforation that surrounds the at least one guide rail and at least one electromagnetic coil that surrounds the at least one perforation. The wiper-arrangement includes a wiper arm and a wiper blade, wherein at least the wiper arm is coupled to the electromagnetic moving block. The control circuitry controls a linear motion of the electromagnetic moving block along the at least one guide rail to steer the wiper arm that is coupled to the electromagnetic moving block back and forth across a length of the windshield to the windshield, wherein the electromagnetic moving block induces minimal friction during the linear motion.

The present invention relates to a gear motor (101), in particular for a wiper system, comprising: -a brushless DC electric motor (103) including: -a rotor; -a stator having coils for electromagnetically exciting the rotor; -a device for determining the angular position of the rotor; -a control unit configured to generate control signals for supplying power to the electromagnetic excitation coils of the stator; -a reduction mechanism (104) that is linked on one side to the rotor of the electric motor (103) and on the other side to an output shaft (109), the reduction mechanism (104) having a predefined reduction ratio and; -an output angular position sensor (110) that is configured to measure the angular position of the output shaft (109), wherein the output angular position sensor (110) that is configured to transmit a signal corresponding to the measured angular position of the output shaft (109) to the device for determining the angular position of the rotor and said device is configured to determine the position of the rotor on the basis of the transmitted signal by taking into account the predefined reduction ratio of the reduction mechanism (104). The invention also relates to a wiper system and to a method for controlling the electric motor (103).