Metering device and method for delivering fluid employing a compensating element

US6530273B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Bernhard Gottlieb · Munich, DE
• Hans Meixner · Haar, DE
• Andreas Kappel · Höhenkirchen-Siegertsbrunn, DE
• Randolf Mock · Munich, DE

Key dates

• Filing date: Nov 24, 1999
• Grant date: Mar 11, 2003
• Expiry date: Nov 24, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/304
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A metering device and method for delivering fluid that employs a compensating element. The metering device has a housing defining a fluid chamber that contains a pressurized fluid. The-housing further encloses an actuating drive, a valve needle and a compensating element. The housing terminates at a housing opening for delivery of fluid to the outside of the housing. Fluid is delivered from the housing by moving the actuating drive which in turn displaces the valve needle in an opening direction. Upon displacement of the valve needle, the valve needle moves axially in the opening direction with little, if any, lift loss due to the compensating element. The compensating element further acts to compensate for shifting or movement of metering components due to external factors, such as varying thermal loads, aging effects, and settling effects.