1. A wireless telephone that may be customized by searching for and selecting an audio file from a remote computer and programming the selected audio file into the wireless telephone for use as an indicia of an incoming communication, the telephone comprising:
a communications link capable of connecting to a database in the remote computer that includes a plurality of polyphonic audio files;
a display screen and a browsing application program that allows a user of the wireless telephone to browse the polyphonic audio files and select at least one polyphonic audio file therefrom;
processing circuitry configured to supervise receipt of a selected polyphonic audio file from the communications link;
a programmable memory circuit for allowing the user to optionally store the selected polyphonic audio file for use as an indicia of an incoming communication; and
an enhanced performance speaker capable of providing a substantially full range of audio sounds from the selected polyphonic audio file when the selected polyphonic audio file is played as an indicia of an incoming communication.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-10. (canceled)
11. A fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, comprising:
an injection valve element for opening and closing at least one injection opening;
a pressure booster with which fuel at system pressure is compressed to injection pressure;
a first control valve triggers the pressure booster and a second control valve triggers the injection valve element;
a pressure booster piston of the pressure booster, which is associated with a spring element, one end of the spring element being supported on an injector housing and an other end of which is supported on the pressure booster piston, wherein the pressure booster piston delimits a compression chamber, a differential pressure chamber, and a control chamber and wherein the control chamber is situated at an end of the pressure booster piston opposite from the compression chamber and the spring element is contained in the control chamber with one end of the spring element being supported on the injector housing and the other end is supported on the pressure booster piston.
12. The fuel injector as recited in claim 11, wherein the spring element tapers conically at the end with which it is supported on the pressure booster piston.
13. The fuel injector as recited in claim 11, wherein a spring plate against which the spring element rests is mounted on the pressure booster piston.
14. The fuel injector as recited in claim 12, wherein a spring plate against which the spring element rests is mounted on the pressure booster piston.
15. The fuel injector as recited in claim 13, wherein the spring plate rests against a ring element that is accommodated in a groove in the pressure booster piston.
16. The fuel injector as recited in claim 14, wherein the spring plate rests against a ring element that is accommodated in a groove in the pressure booster piston.
17. The fuel injector as recited in claim 15, wherein the spring plate has a cylindrical shoulder that encompasses the ring element.
18. The fuel injector as recited in claim 16, wherein the spring plate has a cylindrical shoulder that encompasses the ring element.
19. The fuel injector as recited in claim 11, wherein the pressure booster piston has an upper section that is embodied by a first diameter and is encompassed by the control chamber; a middle section that is embodied by a second diameter larger than the first diameter and that delimits the control chamber with a first shoulder, and that delimits the differential pressure chamber with a second shoulder situated at an opposite end from the first shoulder; and a lower section that is embodied by a third diameter smaller than the second diameter and that delimits the compression chamber.
20. The fuel injector as recited in claim 12, wherein the pressure booster piston has an upper section that is embodied by a first diameter and is encompassed by the control chamber; a middle section that is embodied by a second diameter larger than the first diameter and that delimits the control chamber with a first shoulder, and that delimits the differential pressure chamber with a second shoulder situated at an opposite end from the first shoulder; and a lower section that is embodied by a third diameter smaller than the second diameter and that delimits the compression chamber.
21. The fuel injector as recited in claim 13, wherein the pressure booster piston has an upper section that is embodied by a first diameter and is encompassed by the control chamber; a middle section that is embodied by a second diameter larger than the first diameter and that delimits the control chamber with a first shoulder, and that delimits the differential pressure chamber with a second shoulder situated at an opposite end from the first shoulder; and a lower section that is embodied by a third diameter smaller than the second diameter and that delimits the compression chamber.
22. The fuel injector as recited in claim 19, wherein the spring element is supported on a ring, which rests against a shoulder on the injector housing, and the ring has an inner diameter that is larger than the diameter of the upper section of the pressure booster piston and smaller than the diameter of its middle section.
23. The fuel injector as recited in claim 20, wherein the spring element is supported on a ring, which rests against a shoulder on the injector housing, and the ring has an inner diameter that is larger than the diameter of the upper section of the pressure booster piston and smaller than the diameter of its middle section.
24. The fuel injector as recited in claim 21, wherein the spring element is supported on a ring, which rests against a shoulder on the injector housing, and the ring has an inner diameter that is larger than the diameter of the upper section of the pressure booster piston and smaller than the diameter of its middle section.
25. The fuel injector as recited in claim 11, wherein the pressure booster piston contains a conduit that hydraulically connects the control chamber to the compression chamber and the conduit contains a check valve that prevents a reverse flow of fuel from the compression chamber back into the control chamber.
26. The fuel injector as recited in claim 19, wherein the pressure booster piston contains a conduit that hydraulically connects the control chamber to the compression chamber and the conduit contains a check valve that prevents a reverse flow of fuel from the compression chamber back into the control chamber.
27. The fuel injector as recited in claim 11, wherein the first control valve is able to connect the differential pressure chamber to a fuel supply or to a fuel return.
28. The fuel injector as recited in claim 19, wherein the first control valve is able to connect the differential pressure chamber to a fuel supply or to a fuel return.
29. The fuel injector as recited in claim 27, wherein the first control valve is a 32-way directional-control valve.
30. The fuel injector as recited in claim 28, wherein the first control valve is a 32-way directional-control valve.