Valve arrangement
AssigneeLucas Industries public limited company
InventorMichael Peter Cooke
Life of this patent
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Abstract
A valve arrangement comprises a piezo electric member arranged to control fuel flow through an orifice, the piezo electric member being operable to flex away from the orifice to allow an increased rate of fuel flow therethrough. The piezo electric member is also engageable with a valve member of a pressure relieving valve to control lifting of the valve member from a seating.
Claims6
A valve arrangement comprising a housing, a piezoelectric member located within the housing and having a fixed first end and a second Moveable end, the piezoelectric member generally linearly extending between the first and second ends, the piezoelectric member being arranged to control the rate of flow of fuel to an associated fuel supply system through an orifice provided in the housing by controlling the degree by which the orifice is obscured by the second end of the piezoelectric member, and a pressure relieving valve for relieving the fuel pressure within a common rail or accumulator of the associated fuel supply system, the pressure relieving valve being actuable under the control of the piezoelectric member, the piezoelectric member engaging pressure relieving valve at a location between the first and second ends.
Dependencies are inferred from the claim text.