US 12,240,426 B2
Electropneumatic device with a protective valve unit
Julian van Thiel, Grossburgwedel (DE)
Assigned to ZF CV Systems Global GmbH, Bern (CH)
Filed by ZF CV Systems Global GmbH, Bern (CH)
Filed on Apr. 19, 2023, as Appl. No. 18/303,252.
Application 18/303,252 is a continuation of application No. PCT/EP2021/080072, filed on Oct. 29, 2021.
Claims priority of application No. 10 2020 128 746.1 (DE), filed on Nov. 2, 2020.
Prior Publication US 2023/0264669 A1, Aug. 24, 2023
Int. Cl. B60T 13/68 (2006.01); B60T 13/26 (2006.01)
CPC B60T 13/683 (2013.01) [B60T 13/263 (2013.01); B60T 2270/403 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electropneumatic device for an electronically controllable pneumatic braking system, the electropneumatic device comprising:
a compressed air reservoir for providing a reservoir pressure;
an electropneumatic brake pressure modulator configured to receive the reservoir pressure from said compressed air reservoir and to output a brake pressure at a brake pressure connection in a manner dependent on electronic braking request signals;
a protective valve unit having a protective valve inlet, a first protective valve outlet, and a second protective valve outlet, wherein said protective valve inlet is connected to said brake pressure connection of said brake electropneumatic pressure modulator, is configured to receive the brake pressure, and is configured to provide the brake pressure at said first protective valve outlet and said second protective valve outlet;
a first brake pressure line connected to said first protective valve outlet and a second brake pressure line connected to said second protective valve outlet;
at least one brake actuator connected to said first brake pressure line and said second brake pressure line for receiving the brake pressure; and,
said protective valve unit being configured to throttle or prevent the brake pressure output at said first protective valve outlet in an event of leakage of said first brake pressure line and to throttle or prevent the brake pressure output at said second protective valve outlet in an event of leakage of said second brake pressure line.