Hydraulic unit of a vehicle brake system having an eccentric chamber

Patent metadata

Field	Value
Publication number	US-10589730-B2
Application number	US-201816054641-A
Country	US
Kind code	B2
Filing date	Aug 3, 2018
Priority date	Sep 12, 2017
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

A hydraulic unit of a vehicle brake system includes at least one pump element that is driven via an eccentric, which is enclosed by an eccentric chamber. The hydraulic unit also includes a vacuum pump that is configured to maintain a vacuum in the eccentric chamber while the hydraulic unit is in operation.

First claim

What is claimed is:

1. A hydraulic unit of a vehicle brake system, comprising:
an eccentric enclosed by an eccentric chamber;
at least one pump element driven by the eccentric; and
a vacuum pump configured to maintain a vacuum in the eccentric chamber while the hydraulic unit operates.

2. The hydraulic unit according to claim 1 , wherein the vacuum pump is driven by the eccentric.

3. The hydraulic unit according to claim 1 , wherein the vacuum pump is configured as a peristaltic pump.

4. The hydraulic unit according to claim 1 , wherein the vacuum pump includes a line connection that leads out of the eccentric chamber, and wherein a non-return valve is arranged in the line connection.

5. The hydraulic unit according to claim 4 , wherein the line connection is configured to lead into surroundings of the hydraulic unit.

6. The hydraulic unit according to claim 4 , wherein the line connection is configured to lead out of an underside of the eccentric chamber relative to the fitted position of the hydraulic unit.

7. A method for operating a hydraulic unit of a vehicle brake system, comprising:
driving at least one pump element of the hydraulic unit via an eccentric, the eccentric enclosed by an eccentric chamber; and
maintaining a vacuum in the eccentric chamber via a vacuum pump of the hydraulic unit while operating the hydraulic unit.

8. The method according to claim 7 , wherein the vacuum pump is driven by the eccentric.

9. The method according to claim 7 , wherein the vacuum pump is configured as a peristaltic pump.

10. A vehicle brake system, comprising:
a hydraulic unit that includes:
an eccentric enclosed by an eccentric chamber,
at least one pump element driven by the eccentric, and
a vacuum pump configured to maintain a vacuum in the eccentric chamber while the hydraulic unit operates.

Assignees

• Bosch Gmbh Robert

Inventors

• Haeusser Bernd
• Gaertner Oliver

Classifications

• F04B1/053

  with actuating or actuated elements at the inner ends of the cylinders · CPC title

• F04B1/0443

  Draining of the housing; Arrangements for handling leaked fluids · CPC title

• F04B9/045

  the means being eccentrics · CPC title

• F04B43/123

  using an excenter as the squeezing element · CPC title

• B60T8/4031

  Pump units characterised by their construction or mounting (pump units in combination with valve blocks B60T8/36) · CPC title