US 11,655,661 B2
Anti-pinch method for an apparatus for automatic movement of sliding windows in a motor vehicle, in particular a power-window apparatus, and corresponding device
Alessio Pellegrinetti, Turin (IT); Andrea Novello, Turin (IT); Andrea Bussi, Turin (IT); Carlo Vai, Turin (IT); and Carlo Gallo, Turin (IT)
Assigned to Automotive Lighting Italia S.p.A., Venaria Reale (IT)
Appl. No. 16/481,780
Filed by Automotive Lighting Italia S.p.A., Turin (IT)
PCT Filed Feb. 15, 2018, PCT No. PCT/IB2018/050929
§ 371(c)(1), (2) Date Jul. 29, 2019,
PCT Pub. No. WO2018/158647, PCT Pub. Date Sep. 7, 2018.
Claims priority of application No. 102017000023222 (IT), filed on Mar. 1, 2017.
Prior Publication US 2019/0390500 A1, Dec. 26, 2019
Int. Cl. H02P 27/05 (2006.01); H02P 25/10 (2006.01); E05F 15/41 (2015.01); E05F 15/697 (2015.01); H02P 7/00 (2016.01)
CPC E05F 15/41 (2015.01) [E05F 15/697 (2015.01); H02P 7/0094 (2013.01); E05Y 2900/55 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An anti-pinch method for an apparatus for automatic movement of sliding windows in a motor vehicle, comprising a d.c. electric motor (M) having operating steps (STOP, RUN UP, RUN DOWN) wherein the motor (M) moves a window (F) so that it slides along guides, said method comprising the steps of:
receiving at least one electrical quantity (ea, ia) of said motor (M);
counting a number (Rc) oscillation periods (Rd) of said at least one electrical quantity (ea, ia);
calculating an angular position ((θ(t)) of the motor (M) as a function of said number of oscillation periods (Rc) of the electrical quantity (ea, ia);
calculating a position of the window (F) as a function of said angular position ((θ(t)) of the motor (M); and
reversing the direction of rotation of the motor (M) if the position of said window (F) falls within an anti-pinch zone (APZ) and the movement of the motor (M) is at least partially blocked,
receiving a plurality of electrical quantities (ea, ia) of said motor (M); and
selecting the electrical quantity in order to count said number (Rc) of oscillation periods (Rd) of said electrical quantity in said plurality of electrical quantities (ea, ia) received through a control signal (mode), generated as a function of the operating steps (STOP, RUN UP, RUN DOWN) of the motor (M) comprising a state of arrest (STOP) in which the window (F) is wound up by the motor (M) and in which the window (F) is wound down by the motor (M), said electrical quantity being selected between an armature current (ia) and a back electromotive force (ea) of the motor (M), said back electromotive force (ea) of the motor (M) being selected during said state of arrest (STOP) of the motor (M).