Back to results
US 2015/0136099 A1Published application
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.
Claims18
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;
- the ball retainer has a secondary seal surface configured to cooperate with and abut sealingly against the seat when the ball is not in the ball retainer.
2 more elements
A method for controlling a fuel system for a combustion engine, wherein the fuel system comprises:
- a ball:
- a ball retainer provided with a cavity to accommodate the ball, the ball has a first seal surface configured to cooperate with and abut sealingly against a seat;
- a high pressure pump configured for generating fuel pressure which urges the ball to abut against the seat;
- the method comprises the steps of
- detecting a failure having occurred in the valve;
- and
- reducing the fuel pressure generated by the high-pressure pump to below a seal pressure provided by the abutment of the ball retainer against the seat.
4 more elements
Dependencies are inferred from the claim text.