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US 12,703,334 B2Granted
Electrohydraulic power braking system
AssigneeRobert Bosch GmbH
InventorsAndreas Weh, Martin Hagspiel, Matthias Mayr
Life of this patent
Estimating the term…
Abstract
In the field of autonomous driving, a power braking system having two piston-cylinder units, one of which electromechanically generates a hydraulic brake pressure by means of an electric motor and the other of which communicates with the former in such a way that under pressure it generates a brake pressure in a second brake circuit. The second piston-cylinder unit hydraulically separates two brake circuits from each other.
Claims10
An electrohydraulic power braking system, comprising:
- a first piston-cylinder unit including a first piston which, to generate a hydraulic brake pressure with power, can be displaced using a first electric motor via a rotation/translation converter gear in a first cylinder of the first piston-cylinder unit;
- and
- a second piston-cylinder unit including a second piston and a second cylinder, the second cylinder communicating with the first cylinder of the first piston-cylinder unit in such a way that the hydraulic brake pressure of the first cylinder exerts pressure on a rear face of the second piston in the second cylinder of the second piston-cylinder unit in such a way that the second piston generates a hydraulic brake pressure in the second cylinder of the second piston-cylinder unit on a front face facing away from its rear face,
- wherein the first piston of the first piston-cylinder unit has a larger diameter than the second piston of the second piston-cylinder unit.
1 more element
An electrohydraulic power braking system, comprising:
- a first piston-cylinder unit including a first piston which, to generate a hydraulic brake pressure with power, can be displaced using a first electric motor via a rotation/translation converter gear in a first cylinder of the first piston-cylinder unit;
- a second piston-cylinder unit including a second piston and a second cylinder, the second cylinder communicating with the first cylinder of the first piston-cylinder unit in such a way that the hydraulic brake pressure of the first cylinder exerts pressure on a rear face of the second piston in the second cylinder of the second piston-cylinder unit in such a way that the second piston generates a hydraulic brake pressure in the second cylinder of the second piston-cylinder unit on a front face facing away from its rear face;
- a first brake circuit connected to the first cylinder of the first piston-cylinder unit or on the rear face of the second piston to the second cylinder;
- a second braking circuit connected on the front face of the second piston to the second cylinder of the second piston-cylinder unit;
- a brake fluid reservoir;
- and
- a check valve which connects the first cylinder of the first piston-cylinder unit or the second cylinder of the second piston-cylinder unit and the first brake circuit or the second brake circuit to the brake fluid reservoir and which allows throughflow in a direction of the first cylinder or second cylinder and in a direction of the first brake circuit or the second brake circuit.
4 more elements
An electrohydraulic power braking system, comprising:
- a first piston-cylinder unit including a first piston which, to generate a hydraulic brake pressure with power, can be displaced using a first electric motor via a rotation/translation converter gear in a first cylinder of the first piston-cylinder unit;
- and
- a second piston-cylinder unit including a second piston and a second cylinder, the second cylinder communicating with the first cylinder of the first piston-cylinder unit in such a way that the hydraulic brake pressure of the first cylinder exerts pressure on a rear face of the second piston in the second cylinder of the second piston-cylinder unit in such a way that the second piston generates a hydraulic brake pressure in the second cylinder of the second piston-cylinder unit on a front face facing away from its rear face,
- wherein the power braking system comprises no actuation by muscle power.
1 more element
Dependencies are inferred from the claim text.