US 12,420,761 B2
Parking brake assembly with abs control for each individual wheel
Julian Van Thiel, Grossburgwedel (DE); and Uwe Bensch, Hannover (DE)
Assigned to ZF CV SYSTEMS EUROPE BV, Brussels (BE)
Appl. No. 17/430,327
Filed by ZF CV Systems Hannover GmbH, Hannover (DE)
PCT Filed Feb. 6, 2020, PCT No. PCT/EP2020/052928
§ 371(c)(1), (2) Date Aug. 12, 2021,
PCT Pub. No. WO2020/165008, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 10 2019 103 901.0 (DE), filed on Feb. 15, 2019.
Prior Publication US 2022/0144235 A1, May 12, 2022
Int. Cl. B60T 13/68 (2006.01); B60T 8/176 (2006.01); B60T 15/02 (2006.01); B60T 17/08 (2006.01)
CPC B60T 13/683 (2013.01) [B60T 8/176 (2013.01); B60T 15/027 (2013.01); B60T 17/083 (2013.01); B60T 2201/12 (2013.01); B60T 2270/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A parking brake assembly for an electronically controllable pneumatic braking system for a vehicle, the parking brake assembly comprising:
a parking brake unit having a supply connection configured to receive a supply pressure, a brake request connection configured to receive a parking brake request, and a parking brake pressure connection configured to provide a parking brake pressure, and
an ABS valve assembly having a first ABS valve unit for a first channel and a second ABS valve unit for a second channel,
wherein the first ABS valve unit is configured to receive the parking brake pressure and to provide a first brake pressure for at least one first spring-loaded brake cylinder at the first channel,
wherein the first ABS valve unit is designed to admit air to the first channel, in stages, in dependence on a received first ABS signal,
wherein the second ABS valve unit is configured to receive the parking brake pressure and to provide a second brake pressure for at least one second spring-loaded brake cylinder at the second channel,
wherein the second ABS valve unit is designed to admit air to the second channel, in stages, in dependence on a received second ABS signal,
wherein the first ABS valve unit has a first ABS precontrol unit and a first ABS main valve unit, the first ABS precontrol unit being configured to modulate a first control pressure and a second control pressure,
wherein the second ABS valve unit has a second ABS precontrol unit and a second ABS main valve unit, the second ABS precontrol unit being configured to modulate a third control pressure and a fourth control pressure,
wherein the first ABS precontrol unit has a first inlet precontrol valve configured to modulate the first control pressure, and a first outlet precontrol valve configured to modulate the second control pressure, and
wherein the second ABS precontrol unit has a second inlet precontrol valve configured to modulate the third control pressure, and a second outlet precontrol valve configured to modulate the fourth control pressure.