1. A thermoplastic silicone resin comprising:
a main chain consisting of a polysiloxane and
at least two side chains which branch off from the main chain, wherein
the side chain contains a functional group having two or more atomic groups each capable of forming a hydrogen bonding.
2. The thermoplastic silicone resin according to claim 1, wherein
the functional group is a nucleobase.
3. The thermoplastic silicone resin according to claim 1, wherein
the functional group is at least one selected from the group consisting of thymine, uracil, and adenine.
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. In a fuel injector for internal combustion engines, having a control valve (1) with an electromagnetically actuatable valve needle (3), in which a coil (19) is received in a magnet cup (18) made of magnetizable material, the valve needle (3) having a head (11) with an end face stop (14) at the end of the valve needle (3) facing the magnetic cup (18), at least one tubular clamping sleeve (23) received in the magnet cup (18), the tubular clamping sleeve (23) having a slot (24) extending between its face ends, wherein the diameter (28) of the end face stop (14) of the valve needle head (11) is less than the outer diameter (29) of the tubular clamping sleeve (23) and greater than the inner diameter of the tubular clamping sleeve (23) so that upon opening of the valve the valve needle (3) will strike against only the tubular clamping sleeve (23), and not against the magnet cup (18).
2. The fuel injector as recited in claim 1, wherein the tubular clamping sleeve (23) is braced by spring force against the wail of a bore (22) in the magnet cup (18).
3. The fuel injector as recited in claim 1, wherein the tubular clamping sleeve (23) is made from a nonmagnetizable material.
4. The fuel injector as recited in claim 2, wherein the tubular clamping sleeve (23) is made from a nonmagnetizable material.
5. The fuel injector as recited in claim 1, wherein the tubular clamping sleeve (23) is not deformed by the impact of the valve needle (3) upon opening of the valve.
6. The fuel injector as recited in claim 2, wherein the tubular clamping sleeve (23) is not deformed by the impact of the valve needle (3) upon opening of the valve.
7. The fuel injector as recited in claim 3, wherein the tubular clamping sleeve (23) is not deformed by the impact of the valve needle (3) upon opening of the valve.
8. The fuel injector as recited in claim 1, wherein the tubular clamping sleeve (23) surrounds a closing element (13).
9. The fuel injector as recited in claim 2, wherein the tubular clamping sleeve (23) surrounds a closing element (13).
10. The fuel injector as recited in claim 5, wherein the tubular clamping sleeve (23) surrounds a closing element (13).
11. The fuel injector as recited in claim 1, wherein the width of the slot (24) amounts to a maximum of 25% of the circumference of the tubular clamping sleeve (23).
12. The fuel injector as recited in claim 2, wherein the width of the slot (24) amounts to a maximum of 25% of the circumference of the tubular clamping sleeve (23).
13. The fuel injector as recited in claim 5, wherein the width of the slot (24) amounts to a maximum of 25% of the circumference of the tubular clamping sleeve (23).
14. The fuel injector as recited in claim 1, wherein the length of the tubular clamping sleeve (23) is equivalent to the height (37) of the magnet cup (18), so that face ends (34, 36) of the tubular clamping sleeve (23) and the magnet cup (18) form a smooth face.
15. The fuel injector as recited in claim 2, wherein the length of the tubular clamping sleeve (23) is equivalent to the height (37) of the magnet cup (18), so that face ends (34, 36) of the tubular clamping sleeve (23) and the magnet cup (18) form a smooth face.
16. In a fuel injector for internal combustion engines, having a control valve (1) with an electromagnetically actuatable valve needle (3), in which a coil (19) is received in a magnet cup (18) made of magnetizable material, the improvement comprising at least one clamping sleeve (23) received in the magnet cup (18), the clamping sleeve (23) having a slot (24) extending between its face ends, wherein at least two clamping sleeves (23, 38), whose slots (24, 39) are located at different radial positions, are received in the magnet cup (18).
17. A method for producing a fuel injector as recited in claim 1, comprising first press-fitted the tubular clamping sleeve (23) with spring prestressing into the magnet cup (18), and then grinding the magnet cup (18) together with the tubular clamping sleeve (23) to a height (37), in order to obtain flat end faces.
18. The method as recited in claim 17, wherein the force with which the tubular clamping sleeve is press-fitted into the magnet cup is dimensioned such that an expulsion force in the range of 100 to 500 N is required for releasing the tubular clamping sleeve.