Robert Boschgmbh

Oliver Hennig

Oliver Gaertner

Christoph Gmelin

Patrick Schellnegger

Bernd Haeusser

Stephan Steingass

Rolf Stotz

Vaclav Kocourek

Wolfgang Mailaender

Michael Schuessler

Uwe Konzelmann

Wolfgang Schuller

Marc Zimmermann

Erhard Renninger

Hans Beyrich

Heiko Jahn

Jens Norberg

Horst Beling

Torsten Mais

Beate Schumann

Martin Juretko

Goekhan Oezkan

Marc Zimmerman

A hydraulic unit, in particular a hydraulic unit for a slip-controllable vehicle brake system, includes a housing block, a pump, and a damping device. The pump has an intake side and a delivery side. The housing block has a pump receptacle that holds the pump, a first fluid duct that intersects the pump receptacle in a region of the delivery side of the pump, and a second fluid duct opening into the pump receptacle in the region of the delivery side of the pump, and a first separation point that seals off the first fluid duct from the second fluid duct. The damping device damps pulsations and reduces operating noise of the hydraulic unit without (i) having a detrimental effect on functional characteristics of the unit, in particular on pressure build-up dynamics of the vehicle brake system, or without (ii) jeopardizing a compact construction of the hydraulic unit.

Hydraulic unit

A piston pump, in particular as a pressure generator in an electronically slip-controllable vehicle brake system, includes a pump cylinder, a drivable piston, a pump working chamber, a valve space, and a valve. The drivable piston is slidably accommodated in the pump cylinder. The pump working chamber is bounded by the piston and the pump cylinder. The valve controls a supply of pressure medium to the pump working chamber. The valve has a conical valve seat and a closing element having a domed shell section that interacts with the valve seat. The valve seat surrounds the valve space, into which the closing element plunges, at least up to an imaginary center point of the domed shell section, when the valve seat is closed or open.

Piston pump, in particular as a pressure generator in an electronically slip-controllable vehicle brake system

A valve of a piston pump for a vehicle brake system having a closing body which is resiliently preloaded against a sealing seat. The closing body is formed in two parts with a damping piston and a closing element inserted therein. The damping piston is axially displaceably guided in a cylindrical piston guide. At least one flow channel is provided between the damping piston and the piston guide. The at least one flow channel is configured such that fluid can flow around the damping piston in the longitudinal direction thereof through the at least one flow channel.

Valve of a piston pump having a two-part closing body

A hydraulic unit, in particular for a controllable-slip vehicle brake system, includes a housing block, a pump, a first fluid duct, and a second fluid duct. The housing block defines a pump receptacle that receives the pump, which has a suction side and a pressure side. The first duct crosses the pump receptacle in a region of the pressure side of the pump. The second duct leads into the pump receptacle in the region of the pressure side. The first and second ducts are sealed off from each over via a separation point. The hydraulic unit is configured to enable contact with a damping device configured to damp pulsations and reduce operating noise of the hydraulic unit without negatively impacting functional properties of the hydraulic unit, in particular on pressure build-up dynamics of the vehicle brake system, or without jeopardizing a compact construction of the hydraulic unit.

A piston pump includes a perforated disk as a throttle, in a central hole of which an outlet valve is arranged and its inner edge is fixed externally on a cylinder sleeve base of the piston pump and an outer edge of which lies with prestress on an annular support. Brake fluid displaced out of the piston pump lifts the perforated disk-shaped throttle off from the annular support, with which a dynamic throttle is formed. A throttle channel which negotiates the annular support in the perforated disk-shaped throttle also enables a throughflow in the case of a throttle lying on the annular support.

Piston pump for a hydraulic vehicle brake system

A device for choking a fluid flow includes a pot-like base body, in the base of which a first passage opening is arranged, and a closing body guided axially moveably in the pot-like base body against a spring force of a spring element and having a second passage opening that forms a static choke point with a predefined fixed opening cross section. The closing body in combination with the spring element and the first passage opening forms a dynamic choke point with a dynamic opening cross section that is variably adjustable depending on a pressure difference.

Device for choking a fluid flow and corresponding piston pump for delivering fluids

A device for choking a fluid flow, with a pot-like base body, in the base of which a first passage opening is arranged, and a closing body guided axially moveably in the pot-like base body against a spring force of a spring element and having a second passage opening that forms a static choke point with a predefined fixed opening cross section. The closing body in combination with the spring element and the first passage opening forms a dynamic choke point with a dynamic opening cross section that is variably adjustable depending on a pressure difference.

A valve of a piston pump, in particular for a hydraulic vehicle brake system, includes a closing body configured to be moved in an axially guided manner against a sealing seat. The closing body is formed in two pieces, which include a damping piston and a closing element inserted in the damping piston.

Valve of a piston pump with a closing body

A piston pump as a return pump of a slip-controlled, hydraulic vehicle braking system is disclosed. There is a mushroom-shaped shut-off body as a spring-loaded outlet valve, the shaft thereof extending through a center hole of a tubular damper piston. The shut-off body is movable transversely to the opening and closing direction thereof, so that said shut-off body aligns with a valve seat upon closing. Upon opening, the damper piston forces brake fluid out of a damping chamber in which it is housed so that an opening movement of the outlet valve is dampened.

Discharge valve and damper for a piston pump

A sensor system for determining at least one parameter of a fluid medium which flows in a main flow direction, e.g., an intake air mass flowing through a flow pipe, includes at least one sensor situated in the fluid medium and at least one grating which is situated transversely to the main flow direction and which has at least one bar. On at least one surface over which the fluid medium flows, the bar has at least one shearing element which is designed to generate a region in the flow having a turbulent flow downstream from the shearing element.

Sensor system for determining a parameter of a fluid medium

A device for determining at least one parameter of a medium flowing in a line, in particular for determining the air mass flow rate in the intake manifold of an internal combustion engine, which include a line componentand a sensor devicehaving a bypass part, are known. To prevent separation of the flow at the sidewalls of the bypass part, it is provided that a flow diversion elementbe positioned in the line componentupstream from the bypass partwith respect to the main flow directionand have at least one diversion surfacefacing the main flow direction, which, starting from an apex linelocated at a distance from the bypass part, curves evenly on both sides toward the two sidewallsso that the endsof the diversion surfacefacing away from the apex line are aligned with the sidewalls

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Obersulm, Germany

Oliver Hennig