US 11,981,304 B2
Multiple-circuit hydraulically open braking system, in particular for a highly automated or autonomous vehicle
Thomas Friedrich, Ingersheim (DE); Dirk Drotleff, Oberstenfeld-Gronau (DE); Ralf Kleemann, Benningen Am Neckar (DE); Daniel Brenndoerfer, Ludwigsburg (DE); and Bernd Hienz, Ludwigsburg (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/046,239
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Apr. 5, 2019, PCT No. PCT/EP2019/058586
§ 371(c)(1), (2) Date Oct. 8, 2020,
PCT Pub. No. WO2019/201619, PCT Pub. Date Oct. 24, 2019.
Claims priority of application No. 10 2018 206 082.7 (DE), filed on Apr. 20, 2018.
Prior Publication US 2021/0039616 A1, Feb. 11, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B60T 13/58 (2006.01); B60T 7/12 (2006.01); B60T 8/17 (2006.01); B60T 8/88 (2006.01); B60T 13/14 (2006.01); B60T 13/16 (2006.01); B60T 13/68 (2006.01)
CPC B60T 13/148 (2013.01) [B60T 8/885 (2013.01); B60T 13/686 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A multiple-circuit hydraulically open brake system, comprising:
a first brake circuit having a first pressure relief path;
a second brake circuit having a second pressure relief path;
at least two wheel brakes including at least one first wheel brake assigned to the first brake circuit and at least one second wheel brake assigned to the second brake circuit;
at least one fluid vessel;
two pressure generators connected hydraulically in parallel between the at least one fluid vessel and the at least one first and second wheel brakes;
a modulation unit configured to hydraulically connect the two pressure generators to the at least two wheel brakes and to individually modulate brake pressure in the at least two wheel brakes;
a main system to which a first pressure generator of the two pressure generators is assigned, the main system comprising:
a first energy supply; and
a first evaluation and control unit;
a first shut-off valve configured to connect the main system to the at least one first wheel brake;
a second shut-off valve configured to connect the main system to the at least one second wheel brake;
a secondary system to which a second pressure generator of the two pressure generators is assigned, the secondary system comprising:
a second energy supply, which is independent of the first energy supply; and
a second evaluation and control unit configured to actuate the second pressure generator;
a third shut-off valve configured to connect the secondary system to the at least one first wheel brake; and
a fourth shut-off valve configured to connect the secondary system to the at least one second wheel brake,
wherein components of the modulation unit are assigned to the main system such that that said components of the modulation unit and the first pressure generator are actuated by the first evaluation and control unit and are supplied with energy by the first energy supply.