EP0597272A2
Expired / Lapsed
EP
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Safety cutoff power window control device
Assignee: Magna Closures SpA
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Filing: 1993-10-14
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Granted: —
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Expires: 2013-10-14
Abstract
Abstract A control device (1) for detecting the presence of an obstacle on the basis of the current absorbed by the motor (11) controlling the window (11 a) in the course of an opening or closing stroke. For effectively distinguishing an obstacle from other factors, such as defects on the window guide resulting in a regular, local increase in current absorption, the current measurement is integrated and compared with threshold values varying within the stroke and describing a reference line (20; 21) consisting of a number of line portions (20a-20c), each equal in value to the integral of the current in a respective portion of the stroke in the absence of an obstacle.
Inventors
- 👤 Aldo Filippi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 23:17
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/085; H02H7/0851; H02H3/00; H02H3/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
A safety cutoff power window control device (1) comprising means (6, 7) for detecting the value of a quantity related to the operating power required for effecting an opening or closing stroke of the window (11 a); and processing means (2) for identifying an obstacle on the basis of a predetermined threshold, and for arresting operation of the window in the presence of an obstacle; characterized by the fact that said threshold comprises a reference line (20; 21) consisting of a number of line portions (20a-20c), the value of each line portion being equal to the integral of said quantity within a respective portion of said stroke in the absence of an obstacle; and by the fact that said processing means (2) comprise integrating means (15a) for integrating the values of said quantity detected within said stroke portions; and comparing means (15b) for comparing the present output value of said integrating means with a respective portion of said reference line, for identifying an obstacle.
Claim 2
Dependent Claim
164 words
A safety cutoff power window control device (1) comprising means (6, 7) for detecting the value of a quantity related to the operating power required for effecting an opening or closing stroke of the window (11 a); and processing means (2) for identifying an obstacle on the basis of a predetermined threshold, and for arresting operation of the window in the presence of an obstacle; characterized by the fact that said threshold comprises a reference line (20; 21) consisting of a number of line portions (20a-20c), the value of each line portion being equal to the integral of said quantity within a respective portion of said stroke in the absence of an obstacle; and by the fact that said processing means (2) comprise integrating means (15a) for integrating the values of said quantity detected within said stroke portions; and comparing means (15b) for comparing the present output value of said integrating means with a respective portion of said reference line, for identifying an obstacle.
Claim 3
Dependent Claim
70 words
A device as claimed in Claim 1, characterized by the fact that said processing means (2) comprise shift means (15c) receiving an initial output value (I e ) of said integrating means (15a) in an initial portion of the stroke of said window (11 a), and which provide for shifting a reference characteristic (20) measured previously on the basis of said initial output value, for obtaining said reference line (21).
Claim 4
Dependent Claim
35 words
A device as claimed in Claim 2, characterized by the fact that said reference characteristic (20) is the curve of said output quantity measured in the previous same direction stroke of said window (11 a).
Claim 5
Independent Claim
27 words
A device as claimed in any one of the foregoing Claims, characterized by the fact that said reference line (20; 21) is assigned a predetermined tolerance value.
Claim 6
Independent Claim
42 words
A device as claimed in any one of the foregoing Claims from 1 to 3, characterized by the fact that said reference line (20; 21) is assigned a tolerance value related to the value of a respective portion of said reference line.
Claim 7
Independent Claim
32 words
A device as claimed in any one of the foregoing Claims, characterized by the fact that said integrating and comparing means (15a, 15b) are disabled in a final portion of said stroke.
Claim 8
Independent Claim
32 words
A device as claimed in any one of the foregoing Claims, characterized by the fact that said quantity consists of the current absorbed by the motor (11) controlling said window (11 a).
References Cited (Backward Citations)
No citation records indexed.
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