摘要:
In a system in which an acceleration region SU and a deceleration region SD are provided between operation start and end positions of a wiper arm 1, in the acceleration region and the deceleration region, an addition amount and a subtraction amount are calculated, respectively, based on a difference between a maximum rotation speed and a current rotation speed to update a target rotation speed. The addition amount is set larger than the subtraction amount, and a constant speed region CV is provided between the acceleration region SU and the deceleration region SD. A length of the constant speed region CV can be changed. When a change amount of an operation angle of the wiper arm 1 does not exceed the constant speed region CV, the operation angle change amount is subtracted from the constant speed region. On the other hand, it maybe. Further, when the operation angle change amount exceeds the constant speed region CV, the target rotation speed is updated by the same change amount, e.g., the subtraction amount in the deceleration region both in the acceleration region and the deceleration region.
摘要:
When the number of times of vehicle speed detections reaches a prescribed times "n", a DR-side wiper blade is moved in such a way that when the front end side of a lip reaches a lower-side stop position APS1 , the DR-side wiper blade is temporarily moved to a lower limit position for stop EPSL, then moved to an upper-side stop position APS2 and stopped there, and in such a way that when the front end side of the lip reaches an upper-side stop position APS2, the DR-side wiper blade is moved temporarily to an upper limit position for stop EPSU, then moved to the lower-side stop position APS1 and stopped there.
摘要:
A motor control method wherein the motor rotational speed, the duty, and the power supply voltage are determined (steps S1 to S3), the load point value is acquired referring to a load point map including the motor rotational speed, the duty, and the power supply voltage as parameters and corrected according to the atmosphere temperature of the motor (steps S4, S5), adding the acquired load point value after the acquistion (step S6), comparing the sum of the accumulated point values with a predetermined threshold (step S7), judging that the state is an overload state if the accumulated point value exceeds the threshold and storing the accumulated point values (step S8), the motor is stopped.
摘要:
[PROBLEMS] To ensure visibility of the driver by continuing operation of a wiper even upon failure of a sensor for a motor rotation pulse. [MEANS FOR SOLVING PROBLEMS] A wiper arm is reciprocated for wiping by rotating a motor forward and reversely, and the operation of the wiper arm is controlled according to an absolute position signal outputted when the wiper arm exists at a predetermined position and a motor pulse outputted as the motor rotates. Input of the motor pulse is recognized (S32). When an abnormality occurs in the motor pulse, the motor is rotated forward for a predetermined time at a constant duty (S33). After a forward driving, the motor is rotated reversely for a predetermined time at a constant duty (S34). Consequently, the wiper arm continues reciprocal wiping operation even when a relative position signal is abnormal, thus ensuring visibility of the driver. Forward/reverse operation is continued for a predetermined time, and then the motor is stopped (S35, S36).