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US 6,279,543 B1Granted
Pressure regulator for controlling the pre-injection quantity of fuel in internal combustion engines
AssigneeHydraulik-Ring GmbH
InventorsBernd Niethammer, Steffen Martin, Martin Lenk
Life of this patent
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Abstract
The invention relates to a pressure regulator for controlling a pre-injection quantity of fuel in internal combustion engines, preferably Diesel engines, with a control piston which is connected in a first position with a relief valve for producing a decreased pressure on an injection valve and which, in a second, subsequent position can be separated from the relief valve for producing a higher pressure.
Claims14
A pressure regulator for controlling a pre-injection quantity of fuel in internal combustion engines, comprising:
- a housing means;
- a control piston provided with said housing means and a relief valve for controlling a pressure level on an injection valve, whereby said relief valve in a first position of said control piston is connected to said control piston for producing a decreased pressure on said injection valve, and whereby in a second position of said control piston said relief valve is separated from said control piston for producing a higher pressure, said control piston provided with at least one connecting bore which is connected to a line which is connected to said relief valve, said connecting bore extending from a piston surface to which pressure is applied to an annular groove or a transverse bore provided on a peripheral surface of said control piston or opening into said surface, wherein said annular groove within said control piston is delimited by a threaded ring or a press-fit ring.
Dependencies are inferred from the claim text.