Back to results
US 2003/0080201 A1Published application
Injection device and method for injection of fluids
OwnerFriedrich Boeckinginventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerFriedrich Boeckinginventor
Estimating the term…
The invention relates to an injection device with an injector, a control valve (26) for opening and closing the injector by means of a control chamber (32), and an actuating element (14) for actuating the control valve (26), wherein at least one additional first valve (22) and one additional second valve (24) are provided, the additional first valve (22) can introduce a primary pressure into a pressure chamber (34) of the injector and into the control chamber (32), the additional second valve (24) can connect the pressure chamber (34) of the injector and the control chamber (32) to a leakage system (36), and the control valve (26), the additional first valve (22), and the additional second valve (24) can be actuated by the same actuating element (14). The invention also relates to a method for injecting fluid, which uses the injection device according to the invention.
An injection device with an injector, a control valve (26) for opening and closing the injector by means of a control chamber (32), and an actuating element (14) for actuating the control valve (26), characterized in that at least one additional first valve (22) and one additional second valve (24) are provided, that the additional first valve (22) can introduce a primary pressure into a pressure chamber (34) of the injector and into the control chamber (32), that the additional second valve (24) can connect the pressure chamber (34) of the injector and the control chamber (32) to a leakage system (36), and that the control valve (26), the additional first valve (22), and the additional second valve (24) can be actuated by the same actuating element (14).
The injection device according to one of the preceding claims, characterized in that the control valve (26) and the additional first valve (22) are embodied as 2/2-port directional-control valves.
The injection device according to one of the preceding claims, characterized in that the additional second valve (24) is embodied as a 2/2-port directional-control valve.
The injection device according to one of the preceding claims, characterized in that the control valve (26) is a ball valve.
The injection device according to one of the preceding claims, characterized in that the additional first valve (22) and the additional second valve (24) can be directly actuated by the actuating element (14) via a bridge (20) and that the control valve (26) can be indirectly actuated by the actuating element (14) via the bridge (20).
The injection device according to one of the preceding claims, characterized in that the control valve (26), the additional first valve (22), and the additional second valve (24) are disposed so that with an actuation of the actuating element (14), first the additional second valve (24) closes, then the additional first valve (22) opens, and then the control valve (26) opens.
The injection device according to one of the preceding claims, characterized in that the primary pressure is supplied by a common rail (30).
A method for injecting fluid, in which an actuating element (14) is activated, the actuating element (14) actuates a control valve (26), a pressure chamber (32) is pressure-relieved through the actuation of the control valve (26), and the pressure-relief of the control valve causes an injector to open, characterized in that through the activation of the actuating element (14), at least one additional first valve (22) and one additional second valve (24) are actuated, that the actuation of the additional second valve (24) closes a pressure chamber (34) of the injector and the control chamber (32) off from a leakage system (36), and that the actuation of the additional first valve (22) introduces a primary pressure into the pressure chamber (34) of the injector and into the control chamber (32).
Dependencies are inferred from the claim text.