Brake booster device for a braking system of a vehicle, and method for manufacturing a brake booster device for a braking system of a vehicle

Patent metadata

Field	Value
Publication number	US-9969375-B2
Application number	US-201214347528-A
Country	US
Kind code	B2
Filing date	Aug 7, 2012
Priority date	Sep 30, 2011
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A brake booster device for a braking system of a vehicle includes: a booster body to which a brake-boosting force is exertable by an actuator device; a first piston rod component to which the brake-boosting force is at least partially transmittable via a first contact with the booster body, the first piston rod component contacting the booster body at a first contact surface such that the first piston rod component is at least partially adjustable; and a second piston rod component to which the brake-boosting force is at least partially transmittable via a second contact with the booster body, the second piston rod component contacting the booster body at a second contact surface such that the second piston rod component is adjustable together with the first piston rod component.

First claim

What is claimed is:

1. A brake booster device for a braking system of a vehicle, comprising:
a booster body to which a brake-boosting force is exerted with the aid of an actuator device in such a way that the booster body is adjusted with the aid of the brake-boosting force;
a first piston rod component to which the brake-boosting force is at least partially transmitted via one of (i) a first force-transmitting contact between the first piston rod component which contacts the booster body at a first contact surface or (ii) a first connecting component which contacts the first piston rod component and the first contact surface of the booster body, in such a way that the first piston rod component is at least partially adjusted;
a second piston rod component to which the brake-boosting force is at least partially transmitted via one of (iii) a second force-transmitting contact between the second piston rod component which contacts the booster body at a second contact surface and the booster body or (iv) a second connecting component which contacts the second piston rod component and the second contact surface of the booster body, in such a way that the second piston rod component is adjusted together with the first piston rod component; and
an input rod component on which a brake actuation element is mounted, wherein a driver braking force exerted on the brake actuation element bypasses the booster body and is transmitted to the input rod component, wherein:
the driver braking force is applied to the first piston rod component via the input rod component while the input rod component bypasses the booster body.

2. The brake booster device as recited in claim 1 , wherein the input rod component is at least temporarily in contact with the first piston rod component in such a way that the driver braking force is at least partially transmitted to the first piston rod component, while at least partial transmission of the driver braking force to the second piston rod component is prevented.

3. The brake booster device as recited in claim 2 , wherein the first piston rod component is adjusted with the aid of the driver braking force transmitted at least temporarily to the first piston rod component when the actuator device is present in a deactivated state.

4. The brake booster device as recited in claim 2 , wherein the second piston rod component includes a continuous recess, and the first piston rod component is adjustably situated at least partially within the continuous recess.

5. The brake booster device as recited in claim 2 , wherein the first piston rod component is adjusted in an adjustment direction through a first opening of a brake master cylinder, and the second piston rod component is adjustable in an adjustment direction through a second opening of the brake master cylinder.

6. A power booster for a braking system of a vehicle, comprising:
a brake master cylinder; and
a brake booster device having:
a booster body to which a brake-boosting force is exerted with the aid of an actuator device in such a way that the booster body is adjusted with the aid of the brake-boosting force;
a first piston rod component to which the brake-boosting force is at least partially transmitted via one of (i) a first force-transmitting contact between the first piston rod component which contacts the booster body at a first contact surface or (ii) a first connecting component which contacts the first piston rod component and the first contact surface of the booster body, in such a way that the first piston rod component is at least partially adjusted;
a second piston rod component to which the brake-boosting force is at least partially transmitted via one of (iii) a second force-transmitting contact between the second piston rod component which contacts the booster body at a second contact surface and the booster body or (iv) a second connecting component which contacts the second piston rod component and the second contact surface of the booster body, in such a way that the second piston rod component is adjusted together with the first piston rod component; and
an input rod component on which a brake actuation element is mounted, wherein a driver braking force exerted on the brake actuation element bypasses the booster body and is transmitted to the input rod component, wherein:
the driver braking force is applied to the first piston rod component via the input rod component while the input rod component bypasses the booster body.

7. The power booster as recited in claim 6 , wherein:
the first piston rod component and the second piston rod component protrude into a first pressure chamber of the brake master cylinder in such a way that a residual volume of the first pressure chamber for filling with a fluid is variable with the aid of an adjustment of at least one of the first piston rod component and the second piston rod component; and
the brake master cylinder includes a second pressure chamber into which a floating piston component protrudes in such a way that a second residual volume of the second pressure chamber for filling with a fluid is variable with the aid of an adjustment of the floating piston component.

8. The power booster as recited in claim 6 , wherein:
the first piston rod component protrudes into a first partial pressure chamber of the brake master cylinder in such a way that a partial residual volume of the first partial pressure chamber for filling with a fluid is variable with the aid of an adjustment of the first piston rod component; and
the second piston rod component protrudes into a second partial pressure chamber of the brake master cylinder, which is separated from the first partial pressure chamber by a partition, in such a way that a second partial residual volume of the second partial pressure chamber for filling with a fluid is variable with the aid of an adjustment of the second piston rod component.

9. The power booster as recited in claim 6 , wherein the braking system includes at least one brake.

10. A method for manufacturing a brake booster device for a braking system of a vehicle, comprising:
mounting a booster body in such a way that during an operation of the brake booster device with the aid of an actuator device a brake-boosting force is exerted on the booster body in such a way that the booster body is adjusted with the aid of the brake-boosting force;
positioning a first piston rod component at a first contact surface of the booster body or at a first connecting component contacting the first contact surface of the booster body in such a way that during operation of the brake booster device the brake-boosting force is at least partially transmitted to the first piston rod component in such a way that the piston rod component is adjusted;
additionally positioning a second piston rod component at a second contact surface of the booster body or at a second connecting component contacting the second contact surface of the booster body in such a way that during operation of the brake booster device the brake-boosting force is at least partially transmitted to the second piston rod component in such a way that the second piston rod component is adjusted, together with the first piston rod component; and
exerting a driver braking force on a brake actuation element in order to transmit the driver braking force to an input rod component, the driver braking force bypassing the booster body, wherein:
the driver braking force is applied to the first piston rod component via the input rod component while the input rod component bypasses the booster body.

11. The method of claim 10 , further comprising:
mounting the brake booster device on a brake master cylinder

Assignees

• Weiberle Reinhard
• Willmann Karl Heinz
• Birkheim Andreas
• Kistner Matthias
• Bosch Gmbh Robert

Inventors

• Weiberle Reinhard
• Willmann Karl-Heinz
• Birkheim Andreas
• Kistner Matthias

Classifications

• Y10T29/49236

  Fluid pump or compressor making · CPC title

• B60T13/565 Primary

  characterised by being associated with master cylinders, e.g. integrally formed · CPC title

• B60T11/224

  with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another · CPC title

• B60T11/20

  Tandem, side-by-side, or other multiple master cylinder units · CPC title

• B60T2201/03

  Brake assistants · CPC title