The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 2001
Filed:
May. 19, 1999
Noriaki Terashima, Okazaki, JP;
Denso Corporation, Kariya, JP;
Abstract
A controller for a power window detects a pinching situation where an obstacle is pinched or sandwiched between a frame of a window and a window glass sliding upward. External disturbances such as changes of motor terminal voltage are also detected, and effects thereof on detecting the pinching situation are eliminated. The motor rotational speed variation rates (R) are calculated based on the motor speed (V) in each measuring section divided out from a closing stroke of the power window. The variation rates (R) memorized in a previous closing stroke are used to adjust a threshold value (TH) for finding the pinching situation in a following closing stroke. The motor speed variation rate (R) is compared with the adjusted threshold value (TH′), and the pinching situation is found out when the speed variation rate (R) in a deceleration direction exceeds the adjusted threshold value (TH′). When the pinching situation is found, the motor is stopped, and then the motor is driven to lower the power window.