Pedal travel simulator and hydraulic block including a pedal travel simulator

Patent metadata

Field	Value
Publication number	US-10773697-B2
Application number	US-201716342377-A
Country	US
Kind code	B2
Filing date	Sep 26, 2017
Priority date	Nov 16, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A pedal travel simulator for a hydraulic power vehicle braking system. For the purpose of adapting to different main brake cylinders and of changing a spring characteristic curve, a stop is provided to be pressed into a piston of the pedal travel simulator. A pressing-in depth of the stop delimits a piston stroke.

First claim

What is claimed is:

1. A pedal travel simulator for a hydraulic power vehicle braking system, comprising:
a piston displaceable in a cylinder by brake fluid;
a piston spring which acts upon the piston against a displacement of the piston by the brake fluid; and
an adjustable stroke limiter for the piston;
wherein the stroke limiter is a stop accommodated in the piston, the stop being adjustable in its displacement direction, the piston spring configured to press the stop against, and in direct contact with, a base of the cylinder in an unpressurized state of the pedal travel simulator.

2. The pedal travel simulator as recited in claim 1 , wherein the stop is pressed into a receptacle in the piston, the stroke limiter of the piston of the pedal travel simulator being adjusted by a pressing-in depth of the stop into the receptacle in the piston, the pressing-in depth determining a distance of the piston from the base of the cylinder when the stop is pressed against the base of the cylinder.

3. The pedal travel simulator as recited in claim 1 , wherein the piston includes an adjustable spacer for the piston spring with which the piston spring engages.

4. The pedal travel simulator as recited in claim 3 , wherein the spacer for the piston spring does not have an effect on a stroke of the piston.

5. The pedal travel simulator as recited in claim 3 , wherein the spacer includes a screw connection with the piston with which it is adjustable with regard to the piston in a displacement direction of the piston.

6. The pedal travel simulator as recited in claim 5 , wherein the adjustable spacer includes a self-cutting thread.

7. The pedal travel simulator as recited in claim 1 , wherein the stroke limiter is a cylinder pin.

8. The pedal travel simulator as recited in claim 1 , wherein the piston includes a blind hole, the piston accommodating the stop in the blind hole.

9. A hydraulic block for a hydraulic power vehicle braking system including a pedal travel simulator, the pedal travel simulator including a piston displaceable in a cylinder by brake fluid, a piston spring which acts upon the piston against a displacement of the cylinder by the brake fluid, and an adjustable stroke limiter for the piston, wherein the cylinder of the pedal travel simulator is a hole in the hydraulic block;
wherein the stroke limiter is a stop accommodated in the piston, the stop being adjustable in its displacement direction, the piston spring configured to press the stop against, and in direct contact with, a base of the cylinder in an unpressurized state of the pedal travel simulator.

10. The hydraulic block as recited in claim 9 , wherein the hydraulic block includes a main brake cylinder bore.

11. The hydraulic block as recited in claim 9 , wherein the hydraulic block includes a power cylinder bore.

12. The hydraulic block as recited in claim 9 , wherein the piston includes a thread hole, the piston accommodating the stop in the thread hole.

13. The hydraulic block as recited in claim 9 , wherein the stroke limiter is a cylinder pin.

14. The hydraulic block as recited in claim 9 , wherein the piston includes a blind hole, the piston accommodating the stop in the blind hole.

15. The hydraulic block as recited in claim 9 , wherein the piston includes a thread hole, the piston accommodating the stop in the thread hole.

Assignees

• Bosch Gmbh Robert

Inventors

• Weh Andreas
• Guggenmos Harald
• Hoss Martin
• Mayr Matthias
• Hansmann Simon
• Sprocq Raynald

Classifications

• B60T8/409 Primary

  characterised by details of the stroke simulating device · CPC title

• F15B15/24

  for restricting the stroke · CPC title