1. A centrifuge for the purification of lubricating oil of an internal-combustion engine, including a housing with a removable cover, housing-fixed shaft arranged in the housing and with a centrifuge rotor which is rotatably mounted on the shaft and is replaceable, whereby the shaft is hollow at least in its lower part and forms in its hollow inside a section of a lubricating oil supply canal, which canal is in flow connection with an inside of the centrifuge rotor mounted on the shaft over at least one orifice opening, comprising:
an adjustable valve plug arranged at the shaft and arranged to be held in an open position by the centrifuge rotor, the valve plug releasing the orifice opening in the open position, and
the valve plug arranged to be transferred into a closing position and held in the closing positionby a force created by at least one of a pressure of the lubricating oil and by a preloading component of the centrifuge rotor is missing, the valve plug plugging the orifice opening in the closing position.
2. A centrifuge according to claim 1, wherein a sleeve, which is adjustable in a longitudinal direction of the shaft, is arranged as a valve plug and the orifice opening is a lateral opening from the hollow inside of the shaft outward.
3. A centrifuge according to claim 2, wherein said sleeve is arranged in the hollow inside of the shaft.
4. A centrifuge according to claim 3, wherein the sleeve includes arms running radially from the inside outward, which are situated in longitudinal slots of the lower end area of the shaft and which guide the sleeve secured against torsion.
5. A centrifuge according to claim 2, wherein said sleeve is arranged on an outer circumference of the shaft.
6. A centrifuge according to claim 5, wherein the sleeve includes arms running radially from the outside inward, which are situated in longitudinal slots of the lower end area of the shaft and which guide the sleeve secured against torsion.
7. A centrifuge according to claim 5, wherein a lower end piece of the shaft itself or a shaft pedestal supporting the shaft includes an increased outside diameter in relation to the remaining shaft and the sleeve fits to the increased outside diameter with a stepped interior with a larger diameter in its lower part and with a smaller diameter in its upper part.
8. A centrifuge according to claim 7, wherein the shaft further includes a lateral opening from its hollow inside outward at a height of the larger inside diameter of the sleeve and the sleeve is sealed in its lower end area at its interior diameter against the outer circumference of the shaft or the shaft pedestal by means of a slide seal.
9. A centrifuge according to claim 2, wherein between the sleeve and a pedestal part of the housing at least one pressure spring is arranged as the preloading component.
10. A centrifuge according to claim 2, wherein a lower pivot bearing of the centrifuge rotor is designed as a shaft-fixed antifriction bearing.
11. A centrifuge according to claim 10, wherein the antifriction bearing is arranged at the interior circumference of the sleeve and together the antifriction bearing and the sleeve are axially adjustable on the shaft.
12. A centrifuge according claim 10, wherein a pedestal part of the housing supporting the shaft limits a shift path of the sleeve in its opening direction.
13. A centrifuge according to claim 10, wherein the shaft includes a stop to limit a shift path of the sleeve in its closing direction.
14. A centrifuge according to claim 1, wherein a lower pivot bearing of the centrifuge rotor is designed as a rotor-fixed friction bearing.
15. A centrifuge according to claim 1, wherein a lower pivot bearing of the centrifuge rotor is designed as a shaft-fixed friction bearing.
16. A centrifuge according to claim 1, wherein a valve is integrated into the shaft, which valve releases a supply of lubricating oil to the centrifuge rotor only when achieving a preset minimum lubricating oil pressure.
17. A centrifuge according to claim 1, wherein with the centrifuge rotor inserted into the housing the valve plug is adjustable in the closing direction against a preloading force working in its opening direction by a force which is created by a lubricating oil pressure above a preset upper lubricating oil limiting pressure.
18. A centrifuge according to claim 17, wherein at least one spring is provided between the bottom of the centrifuge rotor and the valve plug, the spring preloading the valve plug with a force directed in its opening direction and the valve plug is adjustable in the closing direction against the force of the spring which is created by a force of the upper lubricating oil limiting pressure.
19. A centrifuge according to claim 18, wherein a guide sleeve, which is adjustable coaxially relative to the shaft, is arranged between the bottom of the centrifuge rotor and the spring, which is, if the centrifuge rotor is inserted, held in a lower final shift position by said centrifuge rotor and which assumes an upper final shift position, if the centrifuge rotor is not present, due to a lubricating oil pressure force or a spring force.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for canceling interference on one or more information carrying signals transmitted over one or more of a plurality of wires, said method comprising the steps of:
(a) selecting a reference wire from one of said plurality of wires to carry a reference signal, said reference wire being separate and distinct from a ground path;
(b) transmitting a reference signal over said reference wire;
(c) selecting an information carrying signal wire from one of said plurality of wires, said information carrying signal wire is a wire other than said reference wire;
(d) transmitting an information carrying signal over said information carrying signal wire; and,
(e) using said reference signal transmitted over said reference wire to cancel interference from said information carrying signal transmitted over said information carrying signal wire.
2. A method as recited in claim 1, further including the step of:
(a) transmitting said information carrying signal between a common card and at least one line card over said information carrying signal wire.
3. A method as recited in claim 1, further including the step of:
(a) subtracting said reference signal transmitted over said reference wire from said information carrying signal transmitted over said information carrying wire to cancel interference from said information carrying signal.
4. A method as recited in claim 3, further including the step of:
(a) converting said information carrying signal and said reference signal from an analog signal to a digital signal prior to step (a) in claim 3.
5. A method as recited in claim 4, wherein:
(a) subtracting said reference signal from said information carrying signal after step (a) in claim 4 using digital signal processing.
6. A method as recited in claim 4, wherein:
(a) performing step (a) in claim 3 using an operational amplifier.
7. A method as recited in claim 3, further including the step of:
(a) filtering said reference signal prior to step (a) in claim 3 using one of a digital filter and an analog filter.
8. A method as recited in claim 7, further including the step of:
(a) filtering said reference signal using a digital FIR filter.
9. A method as recited in claim 3, further including the steps of:
(a) selecting first and second information carrying signal wires from said plurality of wires, said first and second information carrying signal wires being wires other than said reference wire;
(b) transmitting first and second information carrying signals over said first and second information carrying signal wires, respectively; and,
(c) after steps (a) and (b) of this claim, subtracting said reference signal from each of said first and second information carrying signals to cancel interference from said first and second information carrying signals.
10. A method as recited in claim 9, including the further step of:
(a) operably connecting a first filter to said first information carrying wire;
(b) operably connecting a second filter to said second information carrying wire;
(c) filtering said reference signal using said first filter prior to subtracting said reference signal from said first information carrying signal; and,
(d) filtering said reference signal using said second filter prior to subtracting said reference signal from said second information carrying signal.
11. A method as recited in claim 1, further including the steps of:
(a) selecting first and second reference wire from said plurality of wires to carry first and second reference signals, said first and second reference wire being separate and distinct from a ground path; and,
(b) using said reference signals transmitted over said first and second reference wires to cancel interference from said information carrying signal transmitted over said information carrying signal wire.
12. A method of retrofitting a system to carry information at faster data rates than the system was at some prior point in time designed to accommodate, the system includes a common card, a plurality of lines cards and a bus having a plurality of wires in parallel for connecting said common card to said plurality of line cards, said method comprising the step of:
(a) designating one of said plurality of wires previously used to carry an information carrying signal to be a reference wire for carrying a reference signal, said reference wire being separate and distinct from a ground path; and,
(b) reconfiguring the system to use the reference signal to cancel interference on one or more information carrying signals.
13. A method as recited in claim 12, further including the step of: (a) subtracting said reference signal transmitted over said reference wire from at least one information carrying signal transmitted over another of said plurality of wires to cancel interference from said information carrying signal.
14. A method as recited in claim 13, further including the step of: (a) prior to step (a) in claim 13, converting said reference signal and at least one information carrying signal from analog signals to digital signals.
15. A method as recited in claim 13, further including the step of:
(a) prior to step (a) in claim 13, filtering said reference signal.
16. A method as recited in claim 12, further including the step of: (a) subtracting said reference signal transmitted over said reference wire from at least one information carrying signal transmitted over another of said plurality of wires to cancel interference in the form of cross talk between two banks of a shelf as well as inter-bank cross talk in at least one of said two banks from said information carrying signal.
17. A system for canceling interference on information carrying signals transmitted between a common card and a plurality of line cards over a bus having a plurality of wires in parallel, said system comprising:
(a) a common card;
(b) a plurality of line cards;
(c) a bus connecting said common card to said plurality of line cards, said bus including a plurality of wires in parallel, at least one of said plurality of wires being a reference wire for carrying a reference signal between said common card and said plurality of line cards, said reference wire being separate and distinct from a ground path, at least one of said plurality of wires being an information carrying signal wire for carrying an information carrying signal between said common card and at least one of said plurality of line cards, said information carrying signal wire is a wire other than said reference wire; and,
(d) means for subtracting said reference signal transmitted over said reference wire from said information carrying signal transmitted over said information carrying signal wire to cancel interference from said information carrying signal.
18. A system as set forth in claim 17, further including:
(a) an analog to digital converter operably associated with said means for subtracting to convert said information carrying signal and said reference signal from analog signals to digital signals.
19. A system as recited in claim 18, wherein:
(a) said means for subtracting includes a digital signal processor and at least one digital FIR filter.
20. A system as recited in claims 17, further including:
(a) a shelf having two banks, each of said banks having a plurality of line cards, each of said lines cards further having means for subtracting said reference signal transmitted over said reference wire from said information carrying signal transmitted over said information carrying signal wire.