Method and device for flow switchover
AssigneeLuK Lamellen und Kupplungsbau Beteiligungs KG
InventorEugen Kremer
Life of this patent
Estimating the term…
Abstract
A method and a device for flow switchover are described, the time to switch over the fluid being shortened. This is accomplished by a three-way valve, which may be provided with additional connections to the pump and the slider is designed accordingly. With the help of the connections and additional pressure storage in the slider, a corresponding pressure force is stored, which is used during the switchover process, when the connections to the fluid system and to the reservoir are closed, to superimpose over the motion of the slider, with time delay, an additional motion, which is carried out by the sliding ring positioned on the slider.
Claims18
A fluid device comprising:
- a pump;
- a fluid line;
- a reservoir;
- and
- a pilot-pressure-dependent three-way valve having a body including a first connection to the pump, a second connection to the fluid line and a third connection to the reservoir, and a first slider element and a second slider element movable in the body so as to fluidly connect the first connection alternately to either second connection or the third connection, the first slider element and the second slider element being movable independently of each other at least during a time interval of a switchover between when the first and second connections are connected and the first and third connections are connected,
- wherein the body has a first additional connection and a second additional connection to the pump, the first and second additional connections adjoining the first, second and third connections in an axial direction and being spaced apart from the first, second and third connections and from each other.
The device as recited in 3 wherein the first slider element has, starting from an end on a pressure spring side, a blind hole centered on an axis of the first slider element and reaching to the through bore, and further comprising a pin in the blind hole.
A fluid device comprising:
- a pump;
- a fluid line;
- a reservoir;
- and
- a pilot-pressure-dependent three-way valve having a body including a first connection to the pump, a second connection to the fluid line and a third connection to the reservoir, and a first slider element and a second slider element movable in the body so as to fluidly connect the first connection alternately to either second connection or the third connection, the first slider element and the second slider element being movable independently of each other at least during a time interval of a switchover between when the first and second connections are connected and the first and third connections are connected,
- wherein the first slider element has a first diameter, and an indentation with a smaller diameter before an end on a pressure spring side, and in a first step and a second additional step in a direction of the end again reaches the first diameter of the first slider element, and has an additional outermost step with a second diameter larger than the first diameter, the second diameter matching an inside diameter of the body.
Dependencies are inferred from the claim text.