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US 9,964,089 B2Granted
Valve for a fuel system for a combustion engine and method for controlling a fuel system for a combustion engine
AssigneeScania CV AB
InventorKim Kylström
Life of this patent
Estimating the term…
Abstract
A valve (4, 4′) for a fuel system for a combustion engine: A ball retainer (26) is provided with a cavity (28) to accommodate a ball (22). The ball (22) has a first seal surface (30) to cooperate with and abut sealingly against a seat (32). The ball retainer (26) has a secondary seal surface (34) to cooperate with and abut sealingly against the seat (32) when the ball (22) is not in the ball retainer (26). Also, a method for controlling a fuel system for a combustion engine.
Claims12
A valve for a fuel system for a combustion engine comprising:
- a ball;
- a ball retainer having a cavity configured and operable to accommodate the ball;
- a seat opposing the cavity and configured to abut and seal against the ball,
- the ball has a first seal surface configured to cooperate with and to abut sealingly against the seat with a first seal pressure to provide a seal for a first fuel pressure;
- the ball retainer has a secondary seal surface configured to cooperate with and abut sealingly against the seat with a secondary seal pressure to provide a seal for a second fuel pressure when the ball is not in the ball retainer,
- wherein the first seal surface is smaller than the secondary seal surface,
- wherein the first seal surface is a contact surface between the ball and the seat, and the second seal surface is a contact surface between the ball retainer and the seat,
- wherein the secondary seal pressure is below a value needed to counteract the first fuel pressure counteracted by the first seal pressure, and
- wherein the first fuel pressure and the second fuel pressure are sufficient to provide fuel to run the combustion engine.
6 more elements
Dependencies are inferred from the claim text.