US 12,221,819 B2
Tip-to-close on servo-power assisted doors
Besi Rrumbullaku, Rochester, MI (US); and Phillip C. Storck, III, Washington, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Jan. 26, 2023, as Appl. No. 18/159,993.
Prior Publication US 2024/0254822 A1, Aug. 1, 2024
Int. Cl. E05F 15/611 (2015.01)
CPC E05F 15/611 (2015.01) [E05Y 2201/43 (2013.01); E05Y 2400/36 (2013.01); E05Y 2400/40 (2013.01); E05Y 2400/44 (2013.01); E05Y 2900/531 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A door control system comprising:
an actuator configured to open and close a power-assist door;
a sensor configured to measure a velocity of the power-assist door; and
a servo-assist module (SAM) communicatively coupled to the actuator and the sensor, the SAM configured to initiate a tip-to-close function of the power-assist door responsive to door velocity measurements from the sensor and a natural deceleration rate of the power-assist door caused by actuator dampening;
wherein initiating the tip-to-close function of the power-assist door comprises:
determining that the power-assist door is in an open position;
measure a velocity of the power-assist door until a first velocity of the power-assist door measured at a first time has reached a first target velocity, the first velocity defining a minimum speed threshold for activating the tip-to-close function;
responsive to the first velocity of the power-assist door reaching the first target velocity, measure the velocity of the power-assist door until a second velocity of the power-assist door measured at a second time after the first time has reached a second target velocity, the second target velocity less than the first target velocity; and
responsive to the second velocity of the power-assist door reaching the second target velocity, determining a door deceleration rate over an interval between achieving the first door velocity and achieving the second door velocity and comparing the door deceleration rate to a deceleration threshold, wherein the deceleration threshold is equal to the natural deceleration rate of the power-assist door caused by actuator dampening.