1-10. (canceled)
11. A method of operating a vehicle drive-train (5) which comprises a drive machine (2) and a transmission device (3), and during a gearshift in the transmission device (3) at least one interlocking shifting element (F) is disengaged and at least one frictional shifting element (B) is engaged, the method comprising the steps of:
initiating monitoring, at a time (T1) of a shift command, of a shifting time and either a transmission input speed or a rotational speed equivalent to the transmission input speed;
recognizing that the interlocking shifting element (F) is disengaged, if the monitored transmission input speed or the rotational speed equivalent thereto deviates from a synchronous speed equivalent to a gear ratio (\u201c4\u201d) to be disengaged in the transmission device (3);
adjusting a current drive torque (m_mot) of the drive machine (2), if an engaged operating condition of the interlocking shifting element (F) to be disengaged is detected after a lapse of a pre-defined time interval (t7) that begins at the time (T1) of the shift command, by motor actuation (me) to a torque level that corresponds to a difference between either a current transmission input torque or a torque value equivalent thereto and a torque that is transmittable by the frictional shifting element (B) to be engaged, operating with slip, plus a torque offset value, and at which the interlocking shifting element to be disengaged changes, at least for a short time, to an at least approximately load-free operating condition, such that a transmission capacity of the frictional shifting element (B) to be engaged during traction operation of the vehicle drive-train (5) is brought to a traction torque value level (m_mot(zug)) equivalent to the transmission input torque;
adjusting the transmission capacity of the frictional shifting element (B) to be engaged, if a load change takes place in the vehicle drive-train (5) during the gearshift, to a thrust torque value level (m_mot(sub)) equivalent to the current transmission input torque; and
operating the frictional shifting element (B) with slip at least while the interlocking shifting element (F) is engaged.
12. The method according to claim 11, further comprising the step of increasing the transmission capacity of the frictional shifting element (B), if there is a shift command while the interlocking shifting element (F) is engaged, to a level at least approximately corresponding to the transmission input torque, at which the frictional shifting element (B) operates with slip.
13. The method according to claim 11, further comprising the step of determining the current transmission input torque with reference to the current drive torque (m_mot) of the drive machine (2).
14. The method according to claim 11, further comprising the step of setting the transmission capacity of the frictional shifting element (B) to be engaged, if a load change occurs in the vehicle drive-train (5), to a torque value that corresponds at least approximately to the current transmission input torque, and operating the frictional shifting element (B) with slip.
15. The method according to claim 11, further comprising the step of varying the torque offset value, as a function of the operating condition of the vehicle drive-train (5), to maintain a pre-defined shifting time within which the required gearshift has to be carried out.
16. The method according to claim 11, further comprising the step of shifting the frictional shifting element (B) to a fully engaged operating condition, if the open operating condition of the interlocking shifting element (F) is detected.
17. The method according to claim 11, further comprising the step of discontinuing the motor actuation, if the disengaged operating condition of the interlocking shifting element (F) is detected.
18. The method according to claim 17, further comprising the step of changing the current drive torque (m_mot) of the drive machine (2), once the motor actuation (me) ends, to a torque value that corresponds to an actual torque value level specified by an engine control unit.
19. The method according to claim 11, further comprising the step of defining the gearshift as a shift-under-load.
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. An apparatus comprising:
an image buffer configured to store image data to be printed; and
a print head controller configured to:
receive navigation data from at least one sensor;
receive boundary settings to define a print area from a user input;
select a predetermined size based on the boundary settings; and
adjust the print area to the selected predetermined size.
2. The apparatus of claim 1, wherein the print head controller is configured to generate printing instructions based on the adjusted print area and the navigation data received from the at least one sensor, wherein the navigation data describes a position of a handheld printer.
3. The apparatus of claim 1, wherein the print head controller is configured to scale the image data according to the adjusted print area.
4. The apparatus of claim 1, wherein the print head controller is configured to receive a position of a handheld printer from a navigation unit, and the print head controller is configured to access the image buffer based on the position of the handheld printer.
5. The apparatus of claim 4, wherein the print head controller is configured to access the image buffer based on whether the image data corresponding to the position of the handheld printer has already been accessed.
6. The apparatus of claim 1, wherein the print head controller is configured to select the predetermined size nearest to the boundary settings.
7. The apparatus of claim 1, wherein the print head controller is configured to select the predetermined size based on an input file type or a quantity of scaling required.
8. The apparatus of claim 1, wherein the predetermined size is 8.5 inches by 11 inches or 3 inches by 5 inches.
9. The apparatus of claim 1, wherein the predetermined size is selected from a plurality of standard sizes as a standard size nearest the boundary settings.
10. A method of printing using a handheld printer, the method comprising:
receiving, from a plurality of navigation sensors, navigation data defining a position of the handheld printer;
receiving, from a user input, boundary settings to define a print area;
adjusting the print area to an adjusted print area having a predetermined size selected based on the boundary settings; and
generating printing instructions based on the adjusted print area and the position of the handheld printer.
11. The method of claim 10, further comprising:
scaling an image to the adjusted print area.
12. The method of claim 10, further comprising:
accessing an image buffer based on the position of the handheld printer and based on whether the image data corresponding to the position of the handheld printer has already been printed.
13. The method of claim 10, wherein the predetermined size is a size nearest to the boundary settings.
14. The method of claim 10, further comprising:
selecting the predetermined size based on an input file type or a quantity of scaling required.
15. The method of claim 10, wherein the predetermined size is 8.5 inches by 11 inches or 3 inches by 5 inches.
16. The method of claim 10, further comprising:
selecting, from a plurality of standard sizes, a standard size nearest the boundary settings.
17. A print head controller comprising:
a first interface configured to receive image data;
a second interface configured to receive navigation data from a navigation subsystem; and
a third interface configured to receive boundary settings to define a print area from a user input;
wherein the print head controller is configured to adjust the print area to an adjusted print area having a predetermined size selected based on the boundary settings and generate printing instructions based on the adjusted print area, the image data, and the navigation data received from the navigation subsystem.
18. The print head controller of claim 17, wherein the print head controller is configured to access the image data based on whether the image data corresponding to a position of a handheld printer has already been accessed.
19. The print head controller of claim 17, wherein the predetermined size is a size nearest to the boundary settings.
20. The print head controller of claim 17, wherein the predetermined size is selected based on an input file type or a quantity of scaling required.