US 12,447,940 B2
Electronically controlled operating brake system having backup control pressure generated on a basis of an additional compressed air consumer circuit
Falk Hecker, Markgroeningen (DE); Oliver Jundt, Hessigheim (DE); and Friedbert Roether, Cleebronn (DE)
Assigned to KNORR-BREMSE Systeme for Nutzfahrzeuge GmbH, Munich (DE)
Filed by KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH, Munich (DE)
Filed on Sep. 20, 2022, as Appl. No. 17/948,687.
Application 17/948,687 is a continuation of application No. PCT/EP2021/055075, filed on Mar. 1, 2021.
Claims priority of application No. 102020108072.7 (DE), filed on Mar. 24, 2020.
Prior Publication US 2023/0108493 A1, Apr. 6, 2023
Int. Cl. B60T 13/68 (2006.01); B60T 15/02 (2006.01)
CPC B60T 13/683 (2013.01) [B60T 15/027 (2013.01); B60T 2270/402 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An electronically controlled pneumatic operating brake system, comprising:
a first electronic control;
a first brake circuit including a first compressed air supply and a first control valve;
a second brake circuit including a second compressed air supply independent from the first compressed air supply and a second control valve, wherein the first brake circuit is supplied with compressed air from the first compressed air supply and the second brake circuit is supplied with compressed air from the second compressed air supply,
wherein at least one first brake pressure is controllable by the first control valve at at least one first pneumatic operating output of the first control valve in the first brake circuit based on compressed air from the first compressed air supply, and at least one second brake pressure is controllable by the second control valve at at least one second pneumatic operating output of the second control valve in the second brake circuit based on compressed air from the second compressed air supply, wherein at least one pneumatic operating brake actuator of the first brake circuit is connected at the at least one first pneumatic operating output and at least one pneumatic operating brake actuator of the second brake circuit is connected at the at least one second pneumatic operating output,
wherein the first control valve includes a first electrical control input configured to receive a first electrical control signal and a first pneumatic control input configured to receive a first pneumatic control pressure (SD) and the second control valve includes a second electrical control input configured to receive a second electrical control signal and a second pneumatic control input configured to receive a second pneumatic control pressure (SD),
wherein the first electronic control generates the first electrical control signal as a function of a nominal vehicle deceleration and feeds the first electrical control signal to the first electrical control input of the first control valve and generates the second electrical control signal and feeds the second electrical control signal to the second electrical control input of the second control valve,
wherein control signal generation devices are provided that generate the first pneumatic control pressure (SD) as a function of the nominal vehicle deceleration and feed the first pneumatic control pressure (SD) to the first pneumatic control input of the first control valve and generate the second pneumatic control pressure (SD) and feed the second pneumatic control pressure to the second pneumatic control input of the second control valve;
a third compressed air consumer circuit that is independent from the first brake circuit and the second brake circuit and supplied with compressed air by a third compressed air supply that is independent from the first compressed air supply and the second compressed air supply,
wherein a pneumatic supply connection of the control signal generation devices is supplied with compressed air by a greater supply pressure of a first supply pressure in the first compressed air supply and a second supply pressure in the second compressed air supply, or is supplied with compressed air by a third supply pressure of the third compressed air supply, and
wherein the control signal generation devices are configured to generate the first pneumatic control pressure (SD) and feed the first pneumatic control pressure to the first pneumatic control input and generate the second pneumatic control pressure (SD) and feed the second pneumatic control pressure to the second pneumatic control input based on the first supply pressure, the second supply pressure or the third supply pressure provided to the supply connection of the control signal generation devices.