Solenoid valve for hydraulic brake systems with pressure-assisted closing of the valve

US8006951B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Harald Guggenmos · Immenstadt im Allgäu, DE
• Martin Kirschner · Blaichach, DE
• Robert Mueller · Roth, DE
• Peter F. Ullmann · San Jose, US

Key dates

• Filing date: Feb 12, 2008
• Grant date: Aug 30, 2011
• Expiry date: Dec 28, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T15/02
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a solenoid valve having a magnet unit and a valve cartridge having a capsule, an armature guided longitudinally in the capsule and connected to a sealing pin guided longitudinally inside a valve insert, and a valve body with a sealing seat; a magnetic force generated by the magnet unit moves the armature together with the sealing pin from an initial position toward the valve body counter to the force of a return spring, causing the sealing pin to move into and close the sealing seat in an end position, where the initial position represents a maximum volumetric flow between a valve inlet and a valve outlet. A spring support is embodied and situated so that the return spring is supported outside the volumetric flow and presses the armature into the initial position against the capsule, and the inlet and outlet are embodied and situated so that the direction of the volumetric flow assists the closing motion of the armature with the sealing pin.