Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Patent
1997-12-16
1999-12-14
Nappi, Robert E.
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
49 27, G05B 500
Patent
active
060022272
DESCRIPTION:
BRIEF SUMMARY
STATE OF THE TECHNOLOGY
The invention starts from an apparatus and a method for electronically monitoring an adjusting drive arranged in a vehicle according to the generic type having an electronic controller for the adjusting drive which compares the force on the adjusting drive with a supplied limit value for of the closing force limitation of the adjusting drive. DE-A 40 20 351 already discloses a method for the electronic monitoring and control of the opening process and the closing process of electrically operated units, in which method accelerating forces, particularly in the vertical direction, are detected by means of a sensor which must be additionally installed.
SUMMARY AND ADVANTAGES OF THE INVENTION
The apparatus according to the invention and the method according to the invention for electronically monitoring an adjusting drive arranged in a vehicle via an air pressure signal offer the advantage that a limit value of the closing force limitation is matched to the speed-dependent force and pressure conditions via an air pressure signal which is picked up by an air pressure sensor. In this manner, faulty triggering due to high pressure differences, for example, at the sliding roof as a result of a high vehicle speed can be reduced.
Advantageous modifications and features are possible by way of the measures that are respectively cited in the dependent claims.
The apparatus and the method are preferably employed for a sliding roof at whose cover the pressure change results in a build-up of forces and for window lifters because, in the event of changes relative to a reference pressure, the limit value is increased and the risk of faulty triggering is therewith reduced.
BRIEF DRAWING OF THE DRAWING
FIG. 1 illustrates a embodiment of an apparatus according to the invention, and
FIG. 2 shows a schematic circuit diagram of an air pressure signal processing system.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 comprises an electronic control unit 12 an arrangement 18 for supplying at least one limit value of the closing force limitation which generates a limit value 16 of the closing force limitation. Supplied to the electronic control unit 12 are an air pressure signal 17 generated by an air pressure sensor 14 as well as signals that are generated by an external sensor device 13, an adjusting drive 15 and operating elements 11. The electronic control unit 12 emits signals to the operating elements 11 and to the adjusting drive 15.
FIG. 2 illustrates two comparators 21 which are oppositely connected with the air pressure signal 17 and a reference pressure 19, formed by a low pass filter 20. The two comparator output signals are linked by an OR gate 23 and form a processed air pressure signal 22.
The arrangements illustrated in FIGS. 1 and 2 operate as follows:
The desired operating mode such as, for example, the closing of a sliding roof, is communicated to the electronic control unit 12 by means of the operating elements 11. The electronic control unit 12 checks whether a criterion for jamming is present, that is, whether the limit value 16 determined by the arrangement 18 for supplying at least one limit value of the closing force limitation has been reached or exceeded by the actual value. If the electronic control unit 12 has recognized the adjusting drive 15 as being jammed, the adjusting drive 15 is stopped or reversed. This is intended to rule out damage to a person who got caught in the closing region or to the adjusting drive 15. Certain situations result in faulty triggering, particularly if, for example, large forces act on the adjusting drive 15 for a short time. This may be the case at high speeds of a sliding roof disposed in the lifting position or as a result of jolting movements caused by unevenness in the ground.
This faulty triggering is reduced with the present invention by considering the pressure conditions by means of the air pressure signal 17 in that the arrangement 18 uses the air pressure signal 17 to correct the limit value 16. In the event of a pressure c
REFERENCES:
patent: 4773183 (1988-09-01), Okushima
patent: 4991145 (1991-02-01), Goldstein et al.
patent: 5051672 (1991-09-01), Yaguchi
patent: 5185562 (1993-02-01), Huyer
patent: 5537013 (1996-07-01), Toyozumi et al.
patent: 5701063 (1997-12-01), Cook et al.
patent: 5764008 (1998-06-01), Hahn et al.
Haderer Guenter
Lamm Hubert
Duda Rina I.
Kunitz Norman N.
Nappi Robert E.
Robert & Bosch GmbH
LandOfFree
Device and process for electronic monitoring of an adjusting dri does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device and process for electronic monitoring of an adjusting dri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and process for electronic monitoring of an adjusting dri will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-866613