US 11,970,148 B2
Method for activating a parking braking function and a braking system
Ralf Scheib, Wald-Michelbach (DE); Heinz-Anton Schneider, Niedernhausen (DE); Christof Maron, Usingen (DE); Gunther Seipel, Erzhausen (DE); and Giulio Brezza, Savona (IT)
Assigned to Continental Automotive Technologies GmbH, Hannover (DE)
Filed by Continental Teves AG & Co. OHG, Frankfurt am Main (DE)
Filed on Sep. 11, 2020, as Appl. No. 17/018,187.
Application 17/018,187 is a continuation of application No. PCT/EP2019/056143, filed on Mar. 12, 2019.
Claims priority of application No. 10 2018 203 776.0 (DE), filed on Mar. 13, 2018.
Prior Publication US 2020/0406870 A1, Dec. 31, 2020
Int. Cl. B60T 7/12 (2006.01); B60T 1/06 (2006.01); B60T 13/58 (2006.01); B60T 13/74 (2006.01)
CPC B60T 7/12 (2013.01) [B60T 1/067 (2013.01); B60T 13/58 (2013.01); B60T 13/74 (2013.01); B60T 2210/20 (2013.01); B60T 2250/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for activating a parking brake function of a drum brake of a brake system of a vehicle, wherein the drum brake has a number of brake shoes and a number of parking brake units, wherein the brake shoes can be deflected at least by means of the parking brake units, and wherein the parking brake units can be electrically operated, wherein the brake system further has a number of service brake units, wherein the method comprises:
determining a number of signals which characterize a parking situation of the vehicle;
determining a switch-off current depending on the signals;
operating the parking brake units by means of a current;
switching off the current when the current has reached the switch-off current; and
wherein each brake shoe can be operated by at least one parking brake unit and also by one service brake unit.