Patent ID: 6530273
Filing Date: 2003-03-11
Classification: F02M,F16K,G01F

Abstract:
A metering device, comprising:a plurality of metering components, said metering components including a housing, an actuating device, a valve needle, and a compensating element; said housing enclosing said valve needle, said actuating device, and said compensating element, said-housing further defining a fluid chamber, said fluid chamber containing a pressurized fluid and having a housing opening for delivery of said fluid through said housing opening from said fluid chamber; said valve needle being axially displaceable within said fluid chamber, said valve needle having a first needle part and a second needle part, said second needle part having a valve member for closing said housing opening; said actuating device being connected to said first needle part of said valve needle for controlling a metering movement of said valve needle during said delivery of said fluid wherein a lift force is transferred between said first needle part and said second needle part to lift the valve member off the housing opening; and said compensating element being disposed in said fluid chamber and between said first and second needle parts, said compensating element having a compensating element hydraulic chamber and at least one compensating element opening, said compensating element hydraulic chamber being defined by a compensating element first wall, a compensating element second all and a compensating element outside wall, said compensating element first and second walls being flexibly connected by said compensating element outside wall for defining a compensating element spacing between said compensating element first and second walls, said compensating element hydraulic chamber being hydraulically connected to said fluid chamber via said at least one compensating element opening, said at least one compensating element opening being positioned and constructed so that said compensating element effectively compensates for a shifting motion of said metering device components due to a plurality of external factors by changing said compensating element spacing.