US 12,403,880 B2
Vacuum-boosted braking system having redundancy
Thorsten Ullrich, Gernsheim (DE); Tibor Toth, Frankfurt am Main (DE); Martin Kraft, Grävenwiesbach (DE); Manfred Liebl, Karlskron (DE); Bernd Zielke, Schrobenhausen (DE); Stefan Daffner, Hepberg (DE); and Andreea Cenuse, Lippertshofen (DE)
Assigned to Continental Automotive Technologies GmbH, Hannover (DE)
Appl. No. 17/904,944
Filed by Continental Automotive Technologies GmbH, Hannover (DE)
PCT Filed Feb. 11, 2021, PCT No. PCT/DE2021/200013
§ 371(c)(1), (2) Date Aug. 24, 2022,
PCT Pub. No. WO2021/170184, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 10 2020 202 440.5 (DE), filed on Feb. 26, 2020; and application No. 10 2020 206 179.3 (DE), filed on May 15, 2020.
Prior Publication US 2023/0086943 A1, Mar. 23, 2023
Int. Cl. B60T 17/02 (2006.01); B60T 13/66 (2006.01); B60T 13/72 (2006.01); B60T 17/22 (2006.01)
CPC B60T 17/02 (2013.01) [B60T 13/662 (2013.01); B60T 13/72 (2013.01); B60T 17/222 (2013.01); B60T 2270/306 (2013.01); B60T 2270/308 (2013.01); B60T 2270/84 (2013.01); B60Y 2200/91 (2013.01); B60Y 2306/13 (2013.01); B60Y 2400/81 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A hydraulic braking system comprising:
a vacuum brake booster;
an electronic stability control (ESC) system with a hydraulic pump for generating braking force in a wheel-specific manner in a plurality of wheel brakes;
an ESC control device for driving the hydraulic pump;
a hydraulic pressure sensor for determining a hydraulic pressure in the hydraulic braking system;
an electric vacuum pump for supplying the vacuum brake booster;
a vacuum sensor which is connected to the ESC control device; and
wherein the ESC control device is designed to drive the electric vacuum pump logically and electrically; is designed to determine a run-out point of the vacuum brake booster from data from the vacuum sensor, is designed to identify exhaustion of the vacuum brake booster when hydraulic pressure is greater than the run-out point, and is designed to carry out brake boosting with the hydraulic pump in the event of exhaustion.