Anti-Trap Function for Electrical Power Windows 1999-01-1333
Today electrically driven windows are a standard feature in many automobiles. Further technical enhancements like express up/down or remote controlled central closing are important features for increased comfort and ease of operation. Some of these new functions cannot be implemented without inherent safety precautions to avoid the risk of being trapped and severely injured by automatically moving window panes. A sophisticated technical approach is described which solves this problem using state of the art electronics and modern software design combined to yield high cost efficiency. This patented concept is based on motor current detection. Theoretical explanations and practical results illustrate that it is superior to other approaches. Examples are shown of high volume applications currently in production.