Patent EA-001496-B1 (EA)
Title: Method for adjusting the smooth engagement of a gear ratio shift and related transmission device
Inventor: ANTONOV ROUMEN
IPC: F16H61/06
Filed: 1998-09-03
Abstract: 1. A method for adjusting the smooth engagement of a gear ratio shift from a first gear ratio to a second gear ratio in a transmission device, comprising: - a clutch (18, 118, 218) for selective engagement of two rotating elements, - a force generating means (29, R1, 229) of generating an essentially non-regulating force intended for shifting said clutch into one of predetermined positions, sliding or engaging, which corresponds to the second gear ratio, - action means (45, 145, 245) capable to shift said clutch into said second of said positions, which corresponds to the first gear ratio, characterized in that said method comprises adjusting said action means, shifting said clutch by the generating means into a position, which corresponds to the second gear ratio to produce a certain resistance force by the action means, slowing down the transition between the first and the second gear ratios . 2. The method as claimed in claim 1, characterized in that it is applied in the transmission device where a hydraulic actuator (45, 145, 245) is used as an action means and adjusting of this means is executed by a selective connection of its pressure chamber (46) with a pressure source (57). 3. The method as claimed in claim 2, characterized in that said resistance force is regulated by alternating phases, during which the chamber (46) communicates with a purge circuit (151), and phases during which said chamber communicates with said pressure source (57). 4. The method as claimed in claims 1 to 3, characterized in that said action means is excited by impulses. 5. The method as claimed in claim 4, characterized in that force is regulated by regulating the duration of impulses (PW). 6. The method as claimed in claims 1 to 5, characterized in that on said action means (45, 145, 245) an excitation is applied which decreases from the maximum according to predetermined profile of decreasing. 7. The method as claimed in claim 6, characterized in that a physical value (VE, vS) is detected, which experience influences of the smooth engagement of a gear ratio shift from the first gear ratio to the second gear ratio, and said action means is regulated as a function of the result of said detecting. 8. The method as claimed in claim 7, characterized in that as a physical value detect at least one speed (VE) of rotation and compare it with the other speed (VS) of rotation towards which the first speed of rotation varies during the process of the gear ratio shift. 9. The method as claimed in claim 7 or 8, characterized in that said resistance force is regulated in accordance with the difference between the real value obtained by detecting said physical value and a master value during the process of gear ratio shift. 10. The method as claimed in claims 7 to 9, characterized in that in accordance with the detected physical value a second gear ratio shift is additionally adjusted in the transmission device. 11. The method as claimed in claim 10, characterized in that during the second shift in the transmission device this shift is initiated after overcoming the predetermined level (RS) by said physical value. 12. The method as claimed in claim 10 or 11, characterized in that in accordance with the range of values within which said physical value (R) changes during the gear value shift it is determined whether the second gear ratio shift in the transmission device is necessary. 13. The method as claimed in claims 7 to 12, characterized in that an entry speed (VE) of the transmission device compared to its exit speed is detected as a physical value. 14. The method as claimed in claims 1 to 13, characterized in that during the process of the gear ratio shift the direct regulation of the force generating means is not performed. 15. The method as claimed in claims 1 to 14, characterized in that said method is applied in the transmission device in which the force generating means are designed as a means of a centrifugal type. 16. The method as claimed in claims 1 to 15, characterized in that said action means (45, 245) actuates said clutch in the same direction as the (PAC) force produced proportionally to the torque in the transmission device. 17. A transmission device for a vehicle, comprising: at least one gear (107, 207), a clutch (18, 118, 218) capable to shift the gear from the first gear ratio to the second gear ratio by shifting from the first coupling position to the second coupling position, a force generating means (29, R1, 229) of generating an essentially non-regulating force capable for shifting said clutch from the first coupling position to the second coupling position, an action means (45, 145, 245) capable to apply an effort to the clutch trying to shift it to the first coupling position, a control means (452) for adjusting the action means, characterized in that said control means comprise a means (453) for smooth engagement of a gear ratio to enable to apply a force of the definite value by the action device, said force slows down the transition of the clutch from the first coupling position to the second coupling position under the action of the force generating means. 18. The device as claimed in claim 17, characterized in that said action means is designed as a hydraulic drive (45, 145, 245) and the means (453) for smooth engagement of gear ratio are designed for alternating phases of purging and raising the pressure in the working chamber (46). 19. The device as claimed in claim 18, characterized in that said purge channel has a hydraulic resistance. 20. The device as claimed in claims 17 to 19, characterized in that said means (453) for smooth engagement of a gear ratio is capable to generate impulses, at least indirectly applied to said action means (45, 145, 245). 21. The device as claimed in claim 20, characterized in that the impulses have variable duration. 22. The device as claimed in claims 20 or 21, characterized in that that said means (453) for smooth engagement of a gear ratio is capable to apply continuous selective impulse of a constant duration, the value of which is less 100%, to produce an action force compensating spontaneous position shift of the gear ratio in the transmission device. 23. The device as claimed in claims 17 to 22, characterized in that said control means (452) comprises an input, connected to the detecting means (153, 158) of the physical value, susceptible the influence of smooth engagement of a gear ratio after being initiated. 24. The device as claimed in claim 23, characterized in that said control means (452) is sensible to the change of said physical value for adjusting the action of the action means during the shift of the first gear ratio to the second gear ratio. 25. The device as claimed in claim 23 or 24, characterized in that the physical value which is sensible to the control means is its input speed (VE) compared to its output speed (VS). 26. The device as claimed in claims 23 to 25, characterized in that the control means (452) perform servo control of variations of said physical value respective to the command value. 27. The device as claimed in claims 23 to 25, characterized in that the control means are sensible to the variation of said physical value for initiating the programmed at least indirect excitation of the action means. 28. The device as claimed in claims 23 to 27, characterized in that said control means is sensible additionally to a limit value (RS) of said physical value for initiating the second gear ratio shift in the transmission device. 29. The device as claimed in claim 28, characterized in that said device comprises two gears (107, 207) mounted in series, said coupling device (218) is associated with the first (207) of them, in which the drop between the first gear ratio and the second gear ratio is relatively large, and the second gear (107) is associated with the second gear (107) for shifting the gear ratio in the opposite direction having lesser drop. 30. The device as claimed in claims 17 to 29, characterized in that said force generating means are designed as a means (229) of a centrifugal type. 31. The device as claimed in claims 17 to 30, characterized in that said action means (45, 245) is mounted and is capable to increase its action to the clutch (18, 118) operation in the same direction as a means for self-adjusting operates producing the (PAC) force corresponding to the torque in the transmission device. 32. The device as claimed in claim 31, characterized in that said self-adjusting means are the means (132) for transmitting to the clutch (18, 218) the force (PAC) of the reaction of the toothed engagement, produced in the gear (7, 207). 33. The device as claimed in claims 30 to 32, characterized in that the first connection position is a disengaged position at which a rotation torque is transmitted by the gear (7, 207), and the second connection position is a connection position at which the gear is short-connected by said clutch from the point of view of the torque transmission.