US 12,065,112 B2
Method for operating a braking system, and braking system
Martin Brenn, Mainz (DE); and Thorsten Ullrich, Gernsheim (DE)
Assigned to Continental Teves AG & Co. OHG, Frankfurt am Main (DE)
Appl. No. 17/310,086
Filed by Continental Teves AG & Co. OHG, Frankfurt am Main (DE)
PCT Filed Dec. 18, 2019, PCT No. PCT/EP2019/085915
§ 371(c)(1), (2) Date Jul. 15, 2021,
PCT Pub. No. WO2020/151884, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 10 2019 200 807.0 (DE), filed on Jan. 23, 2019.
Prior Publication US 2022/0073048 A1, Mar. 10, 2022
Int. Cl. B60T 17/22 (2006.01); B60T 13/14 (2006.01); B60T 13/58 (2006.01); B60T 13/66 (2006.01); B60T 17/06 (2006.01)
CPC B60T 17/06 (2013.01) [B60T 13/142 (2013.01); B60T 13/58 (2013.01); B60T 13/662 (2013.01); B60T 17/225 (2013.01); B60T 2270/402 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A braking system comprising:
hydraulically actuatable wheel brakes, wherein pairs of two wheel brakes of the hydraulically actuatable wheel brakes are assigned to a respective brake circuit of a plurality of brake circuits;
an electrically controllable pressure supply device connected to the hydraulically actuatable wheel brakes, the electrically controllable pressure supply device comprising:
a master brake cylinder actuated by means of a brake pedal and connected to the wheel brakes; and
a brake fluid reservoir having a first reservoir chamber and a second reservoir chamber separated by a first partition wall,
wherein the first reservoir chamber is connected to the pressure supply device via a first port for fluid removal, via which the electrically controllable pressure supply device is supplied with pressure medium, and the second reservoir chamber is connected to the master brake cylinder via a second port for fluid removal, via which the master brake cylinder is supplied with pressure medium, wherein at least one brake fluid sensor is provided;
a first filling level, a second filling level, and at least one third filling level of the brake fluid reservoir, wherein the filling level is measure by the at least one brake fluid sensor and wherein the second filling level is lower than the first filling level and the at least one third filling level is lower than the first and the second filling levels; and
wherein the brake system is operated in a first operating mode when the first filling level is reached, in a second operating mode when the second filling level is reached and in a fallback mode when the at least one third filling level is reached.