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US 2024/0190404 A1Published application
Electrohydraulic dual-circuit power brake system
OwnerAndreas Weh, Martin Hagspiel +1inventors
InventorsAndreas Weh, Martin Hagspiel, Matthias Mayr
Life of this patent
Estimating the term…
Abstract
Hydraulically separating both brake circuits of an electrohydraulic dual-circuit power brake system. A piston-cylinder unit having two pistons is provided, the first piston of which being displaceable with a first electric motor via a worm gear and the second piston of which being displaced by subjecting it to pressure by the first piston.
Claims10
1-9. (canceled)
An electrohydraulic dual-circuit power brake system, comprising:
- a brake fluid container;
- a piston-cylinder unit, a cylinder of piston-cylinder unit being connected to the brake fluid container, the piston-cylinder unit including a first piston which can be displaced with a first electric motor via a rotation/translation conversion gear in the cylinder of the piston-cylinder unit to generate hydraulic brake pressure, and a second piston which is displaced in the cylinder by subjecting it to hydraulic pressure by the first piston or mechanically by abutment of the first and second pistons on one another;
- two brake circuits, which are connected to the cylinder of the piston-cylinder unit in a manner hydraulically separated from one another by the second piston;
- and
- a power brake pressure generator using which hydraulic brake pressure in a brake circuit of the power brake system can be generated as an alternative to generating brake pressure with the piston-cylinder unit;
- and
- a check valve through which the power brake pressure generator is connected to the brake fluid container.
4 more elements
A method for returning pistons of an electrohydraulic dual-circuit power brake system, the power brake system including:
- a brake fluid container,
- a piston-cylinder unit, a cylinder of piston-cylinder unit being connected to the brake fluid container, the piston-cylinder unit including a first piston which can be displaced with a first electric motor via a rotation/translation conversion gear in the cylinder of the piston-cylinder unit to generate hydraulic brake pressure, and a second piston which is displaced in the cylinder by subjecting it to hydraulic pressure by the first piston or mechanically by abutment of the first and second pistons on one another,
- two brake circuits, which are connected to the cylinder of the piston-cylinder unit in a manner hydraulically separated from one another by the second piston;
- and
- a power brake pressure generator using which hydraulic brake pressure in a brake circuit of the power brake system can be generated as an alternative to generating brake pressure with the piston-cylinder unit, and
- a check valve through which the power brake pressure generator is connected to the brake fluid container,
- wherein the power brake pressure generator is connected to the cylinder by a valve, and the method comprises:
- subjecting at least one of the first and second pistons to hydraulic pressure, by the power brake pressure generator.
5 more elements
Dependencies are inferred from the claim text.