Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1988-11-16
1991-06-11
Pellinen, A. D.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
200443, 200444, 200DIG2, 1525013, H02P 104
Patent
active
050234676
DESCRIPTION:
BRIEF SUMMARY
The invention proceeds from a method of controlling the interval of time between wiping movements of wipers in vehicles, wherein the interval of time between two consecutive wiping movements is observed and is set by means of a selector switch, which has at least the switch positions "wiping operation OFF" and "interval operation ON", and by means of an electric control circuit, by which the interval of time between two consecutive wiping movements (hereinafter called interval time) is measured, at least the second of said wiping movements has arbitrarily been started by an actuation of the selector switch, the measured value is stored and is subsequently used as interval time until a renewed arbitrary starting of wiping movements by a renewed actuation of the selector switch has been effected and another interval time is stored or the interval wiping operation of the wiper is interrupted or the control circuit is deenergized.
In interval switches for controlling the interval of time between wiping movements of wipers, as they are nowadays installed in vehicles, there is almost always predetermined a fixed interval time between two consecutive wiping movements. Therefore, it frequently occurs in practical operation that this interval time is too long or too short, depending on the intensity of rain falling at the moment. To overcome this problem, the DE-35 29 004 C1 has already disclosed a method for influencing the interval of time between wiping movements of wipers. The generic part of claim 1 has been formed in accordance with this known method. The known method proceeds from the fact that the vehicle has an actuating switch for the wipers, which has the consecutive switch positions "OFF", "interval operation ON" and "continuous operation ON". This prerequisite is not fulfilled in many motor vehicles, so that it is merely for this reason why the application of the known method in kits for retrofitting vehicles that have already been delivered is limited.
Proceeding from the switch position "interval operation ON" the wiping interval in the method described in the DE-35 29 004 C1 is shortened by changing over to the switch position "continuous operation ON" and by returning to the position "interval operation ON", whereas the wiping interval is prolonged by changing over to the position "OFF" and by returning to the position "interval operation ON". This method has various disadvantages. On the one hand, it is rather complicated for the driver that he has to perform different operations for prolonging and shortening the wiping interval Moreover, it is disadvantageous that for shortening the wiping interval the switch position "continuous operation ON" is required, for the corresponding electrical line from the switch to the wiper motor leads directly, i.e. by by-passing the interval relay, to the motor of the wiper. For realizing the method described in the DE-35 29-004 C1 one can therefore not simply replace the interval relay by a modified component containing an interval control circuit which operates according to the known method. However, this would be a prerequisite for a practicable possibility for retrofitting vehicles that have already been delivered.
In the DE-31 08 263 A1 a programmable apparatus for changing the wiping interval is described, which the driver must turn off for prolonging the wiping interval between two wiping movements for the period by which he wants to prolong the wiping interval. To shorten the wiping interval the driver must turn off the apparatus during a wiping movement and turn it on again after the desired new interval time. What is disadvantageous in this known apparatus is the fact that for prolonging the wiping interval the driver must perform a different operation than for shortening the wiping interval. The process of shortening the wiping interval particularly calls for his attention, thus distracting him from the traffic, because he must turn off the apparatus during the short period of a wiping movement. Moreover, it is rather difficult to retrofit vehicles tha
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patent: 4375610 (1983-03-01), Nagaoka et al.
patent: 4388574 (1983-06-01), Bois et al.
patent: 4492904 (1985-01-01), Graham
patent: 4625157 (1986-11-01), Phillimore
patent: 4859919 (1989-08-01), Tracht
Elektor, No. 60, Apr. 1980, "Intelligent Wiper Delay", pp. 18-23, `Instruction for Use`.
Doduco GmbH & Co. Dr. Eugen Durrwachter
Gaffin Jeffrey A.
Pellinen A. D.
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