1. A relatively low viscosity transmission fluid composition comprising a lubricant basestock, at least one active sulfur-containing component, and at least one phosphorus-containing compound, wherein an active sulfur atom content of the composition is greater than about 0.02 wt. %, a ratio of active sulfur atoms to phosphorus atoms in the composition is above about 5, and the composition has a viscosity at 100\xb0 C. ranging from about 4 to less than about 7 centistokes.
2. The composition of claim 1, wherein the at least one phosphorus-containing compound comprises a boronatedphosphorylated dispersant and wherein an active sulfur atom to boron atom ratio in the composition is greater than about 15.
3. The composition of claim 1, wherein the composition has a Brookfield viscosity of less than about 30,000 centipoise at \u221240\xb0 C.
4. The composition of claim 1 wherein the basestock selected from the group consisting of Group II basestocks, Group III basestocks, gas to liquid basestocks, and mixtures thereof.
5. The composition of claim 1, further comprising an antioxidant, a friction modifier, a corrosion inhibitor, a surfactant, and an antifoam agent.
6. The composition of claim 1, wherein the at least one phosphorus-containing compound is selected from the group consisting of phosphonates, phosphates, phosphites, phosphate salts, phosphorylated succinimides, and mixtures thereof.
7. The composition of claim 1, wherein the composition has a viscosity index of greater than about 120.
8. The composition of claim 1, wherein the at least one active sulfur-containing component comprises an extreme pressure agent.
9. The composition of claim 1, wherein the at least one active sulfur-containing component comprises a thiadiazole of the formula
wherein R1 is selected from straight and branched chain alkyl groups having from 1 to 30 carbon atoms, R2 is selected from hydrogen and straight and branched chain alkyl groups having from 1 to 30 carbon atoms, and a and b are independently selected from integers ranging from 1 to 3.
10. The composition of claim 1, wherein the at least one active sulfur-containing component comprises a compound selected from the group consisting of sulfonates, sulfurized olefins, sulfides, sulfates, and mixtures thereof.
11. The composition of claim 1, comprising a fluid suitable for use in a continuously variable transmission.
12. The composition of claim 1, comprising a fluid suitable for use in a dual clutch transmission.
13. The composition of claim 1, comprising a fluid suitable for use in an automatic transmission.
14. An additive concentrate for a transmission fluid comprising at least one active sulfur-containing component and at least one phosphorus-containing compound sufficient to provide more than about 0.02 wt. % active sulfur to a finished transmission fluid, and a ratio of active sulfur atoms to phosphorus atoms in the finished transmission fluid of greater than about 5, wherein the finished transmission fluid containing the additive concentrate has a viscosity at 100\xb0 C. ranging from about 4 to less than about 7 centistokes.
15. The additive concentrate of claim 14, wherein the at least one phosphorus-containing compound comprises a boronatedphosphorylated dispersant.
16. The additive concentrate of claim 15, wherein a ratio of active sulfur atoms to boron atoms in the finished transmission fluid is greater than about 15.
17. The additive concentrate of claim 14, wherein the finished transmission fluid containing the additive concentrate has a Brookfield viscosity of less than about 30,000 centipoise at \u221240\xb0 C.
18. The additive concentrate of claim 14, further comprising an antioxidant, a friction modifier, a corrosion inhibitor, a surfactant, and an antifoam agent.
19. The additive concentrate of claim 14, wherein the at least one phosphorus-containing compound is selected from the group consisting of phosphonates, phosphates, phosphites, phosphate salts, phosphorylated succinimides, and mixtures thereof.
20. The additive concentrate of claim 14, wherein the finished transmission fluid containing the additive concentrate has a viscosity index of greater than about 120.
21. The additive concentrate of claim 14, wherein the at least one active sulfur-containing component comprises a thiadiazole of the formula
wherein R1 is selected from straight and branched chain alkyl groups having from 1 to 30 carbon atoms, R2 is selected from hydrogen and straight and branched chain alkyl groups having from 1 to 30 carbon atoms, and a and b are independently selected from integers ranging from 1 to 3.
22. The additive concentrate of claim 14, wherein the at least one active sulfur-containing component comprises a compound selected from the group consisting of sulfonates, sulfurized olefins, sulfides, sulfates, and mixtures thereof.
23. A finished transmission fluid comprising the additive concentrate of claim 14 and a lubricant basestock selected from the group consisting of Group II basestocks, Group III basestocks, and gas to liquid basestocks.
24. The finished transmission fluid of claim 23, comprising a fluid suitable for use in an automatic transmission.
25. The finished transmission fluid of claim 23, comprising a fluid suitable for use in a continuously variable transmission.
26. The finished transmission fluid of claim 23, comprising a fluid suitable for use in a dual clutch transmission.
27. A method for improving fuel economy of a motor vehicle comprises the steps of:
providing a transmission fluid to a transmission of the motor vehicle wherein the transmission fluid comprises a lubricant basestock, at least one active sulfur-containing component, and at least one phosphorus-containing compound, wherein an active sulfur atom content of the transmission fluid is greater than about 0.02 wt. %, a ratio of sulfur atoms to phosphorus atoms in the transmission fluid is above about 5, and the transmission fluid has a viscosity at 100\xb0 C. ranging from about 4 to less than about 7 centistokes; and
operating the motor vehicle.
28. The method of claim 27, wherein the at least one phosphorus-containing compound comprises a boronatedphosphorylated dispersant.
29. The method of claim 28, wherein a ratio of active sulfur atoms to boron atoms in the transmission fluid is greater than about 15.
30. The method of claim 27, wherein the transmission fluid has a Brookfield viscosity of less than about 30,000 centipoise at \u221240\xb0 C.
31. The method of claim 27, wherein the transmission fluid includes an antioxidant, a friction modifier, a corrosion inhibitor, a surfactant, and an antifoam agent.
32. The method of claim 27, wherein the at least one phosphorus-containing compound is selected from the group consisting of phosphonates, phosphates, phosphites, phosphate salts, phosphorylated succinimides, and mixtures thereof.
33. The method of claim 27, wherein the transmission fluid has a viscosity index of greater than about 120.
34. The method of claim 27, wherein the at least one active sulfur-containing component comprises a thiadiazole of the formula
wherein R1 is selected from straight and branched chain alkyl groups having from 1 to 30 carbon atoms, R2 is selected from hydrogen and straight and branched chain alkyl groups having from 1 to 30 carbon atoms, and a and b are independently selected from integers ranging from 1 to 3.
35. The method of claim 27, wherein the at least one active sulfur-containing component comprises a compound selected from the group consisting of sulfonates, sulfurized olefins, sulfides, sulfates, and mixtures thereof.
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 radio frequency identification (RFID) system comprising:
a radio frequency source adapted to provide radio frequency energy to an RFID device;
a short-range coupler adapted to couple with the RFID device, wherein the radio frequency energy from the radio frequency source is not provided via the short-range coupler;
at least one diode coupled to the short-range coupler; and
an interface, coupled to the at least one diode, adapted to provide via the short-range coupler and the at least one diode at least one of a modulation of the radio frequency energy to the RFID device and a detection of a signal provided by the RFID device.
2. The radio frequency identification system of claim 1, further comprising a controller, coupled to the interface, adapted to control inputoutput ports of the interface to provide the modulation of the radio frequency energy and the detection of the signal provided by the RFID device.
3. The radio frequency identification system of claim 1, wherein the radio frequency source further comprises at least one of a transmission line and an antenna.
4. The radio frequency identification system of claim 1, wherein the short-range coupler couples to the RFID device by at least one of an electric field, a magnetic field, and a direct connection.
5. The radio frequency identification system of claim 1, further comprising:
a plurality of short-range couplers adapted to couple with corresponding ones of the RFID devices;
a plurality of diodes coupled to corresponding ones of the short-range couplers;
a plurality of interfaces coupled to the corresponding ones of the diodes; and
a controller, coupled to the plurality of interfaces, adapted to control the interfaces to provide at least one of the modulation of the radio frequency energy and the detection of the signal provided by the RFID device, wherein the radio frequency source provides the radio frequency energy to the plurality of the RFID devices.
6. The radio frequency identification system of claim 1, wherein the RFID device comprises at least one of an RFID tag, an RFID label, an RFID chip, an RFID strap, and an RFID inlay.
7. The radio frequency identification system of claim 1, wherein voltage levels provided by the interface to the at least one diode provides the modulation via the short-range coupler of the radio frequency energy to the RFID device.
8. The radio frequency identification system of claim 1, wherein voltage levels provided by the interface to the at least one diode provides the detection of the signal from the RFID device via the short-range coupler.
9. The radio frequency identification system of claim 1, wherein the at least one diode comprises a first and a second diode, with the first diode coupled to a first port of the interface and to the second diode, and the second diode coupled to a second port of the interface.
10. The radio frequency identification system of claim 9, wherein the modulation is provided by setting the second port to a first voltage level and switching between a second voltage level and a third voltage level on the first port, and wherein the detection is provided by setting the second port to the first voltage level and monitoring voltage levels on the first port.
11. A radio frequency identification (RFID) communication system comprising:
means for providing a radio frequency signal to a plurality of RFID devices;
means for coupling to the plurality of RFID devices; and
means for controlling voltage levels to provide via the coupling means a modulation of the radio frequency signal to the RFID devices, wherein the controlling means provides a low frequency data signal to provide the modulation.
12. The radio frequency identification system of claim 11, wherein the radio frequency signal is a common signal provided to the RFID devices from the radio frequency signal providing means.
13. The radio frequency identification system of claim 11, wherein the coupling means couples to the RFID devices by at least one of an electric field, a magnetic field, and a direct connection.
14. The radio frequency identification system of claim 11, further comprising means for monitoring voltage levels to detect via the coupling means signals provided by the RFID devices.
15. The radio frequency identification system of claim 11, wherein the coupling means is separate from the providing means which is a common source of the radio frequency signal for the RFID devices.
16. The radio frequency identification system of claim 11, wherein the system is formed as part of at least one of a printer and a manufacturing test system.
17. A method of communicating with radio frequency identification (RFID) devices, the method comprising:
providing a common radio frequency signal to the RFID devices;
coupling in a near field region with the RFID devices; and
interfacing with the RFID devices through the near field region coupling to modulate the common radio frequency signal to the RFID devices, wherein a low frequency data signal is provided to modulate the common radio frequency signal to the RFID devices.
18. The method of claim 17, further comprising interfacing with the RFID devices through the near field region coupling to detect signals provided by the RFID devices.
19. The method of claim 17, wherein the coupling is by at least one of an electric field, a magnetic field, and a direct connection.
20. The method of claim 17, wherein the near field region coupling for the interfacing does not provide the common radio frequency signal of the providing, and wherein the interfacing sets a first voltage level at a second port and switches between a second voltage level and a third voltage level on a first port corresponding to each of the RFID devices to modulate the common radio frequency signal, and wherein the interfacing further comprises detecting a signal provided by each of the RFID devices by setting the second port to the first voltage level and monitoring voltage levels on the first port.
21. A radio frequency identification (RFID) system comprising:
a radio frequency source adapted to provide un-modulated radio frequency energy to one or more RFID devices;
a short-range coupler adapted to couple with one of the RFID devices, wherein the un-modulated radio frequency energy is not provided via the short-range coupler; and
means for detecting via the short-range coupler information from the RFID device and for modulating via the short-range coupler the radio frequency energy provided to the RFID device.
22. The RFID system of claim 21, wherein the radio frequency source comprises a transmission line and a plurality of short-range radio frequency couplers to provide the un-modulated radio frequency energy to the RFID devices.
23. The RFID system of claim 22, wherein the radio frequency source further comprises a plurality of amplifiers corresponding to the plurality of short-range couplers.
24. The RFID system of claim 21, wherein the detecting means comprises an RF detector and the modulating means comprises a switch and a controller.
25. The RFID system of claim 21, wherein the detecting means and the modulating means comprises a controller and at least one diode.