US 11,851,044 B2
Pedal travel simulator, and hydraulic block comprising a pedal travel simulator
Andreas Weh, Sulzberg (DE); Martin Hagspiel, Rettenberg (DE); and Harald Guggenmos, Immenstadt/Seifen (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/607,318
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Apr. 3, 2020, PCT No. PCT/EP2020/059512
§ 371(c)(1), (2) Date Oct. 28, 2021,
PCT Pub. No. WO2020/224883, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 10 2019 206 660.7 (DE), filed on May 9, 2019.
Prior Publication US 2022/0203948 A1, Jun. 30, 2022
Int. Cl. B60T 8/40 (2006.01); F15B 7/06 (2006.01); F15B 19/00 (2006.01)
CPC B60T 8/409 (2013.01) [F15B 7/06 (2013.01); F15B 19/007 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A pedal travel simulator for a hydraulic powered vehicle brake system, comprising:
a simulator cylinder having a hydraulic connection at a closed end of the simulator cylinder by which the simulator cylinder communicates with a master brake cylinder;
a simulator piston that is displaceable in the simulator cylinder;
a hollow cylinder cover that closes an open end of the simulator cylinder;
a first piston spring that is situated in the hollow cylinder cover;
a multifunction part that is fastened on a side, facing the simulator cylinder, of the first piston spring on or in the cylinder cover, the multifunction part being configured to permit fluid to flow from the cylinder cover into the simulator cylinder and from the simulator cylinder into the cylinder cover, and holds the first piston spring in the cylinder cover;
wherein between the first piston spring and the simulator piston, a spacer is situated that extends through the multifunction part, that is loaded by the first piston spring in a direction of the simulator piston, and that, after a first displacement path of the simulator piston, transmits a spring force of the first piston spring to the simulator piston, and wherein the pedal travel simulator includes a second piston spring that, during the first displacement path, loads the simulator piston in a direction of the closed end of the simulator cylinder.