Title:
発進ギヤ段を求める方法。
Document Type and Number:
Japanese Patent JP4312387
Kind Code:
B2
Abstract:
The invention relates to a method for determining a starting gear step for a vehicle with a stepped variable speed transmission with several gear steps. It is proposed that a maximum admissible value for a slip time (12) and/or a maximum admissible value for a frictional work (14) of the starting clutch during the starting process, the same as an available engine torque (10) for starting be determined, that beginning with a highest suitable gear step (18) for starting, values for the slip time (20) and/or the frictional work (22) be calculated in advance depending on the vehicle mass (8), that the precalculated values (20, 22) be compared with the maximum admissible values (12, 14), that the calculation loop be repeated with the next smaller suitable gear step for starting when at least one of the precalculated values is greater than the maximum admissible values and that a gear step be issued as starting gear step when the precalculated values are smaller than or equal to the maximum admissible values.
Inventors:
Andreas, Wolff
Matthias, Winkel
Christoph, Ryuhard
Bertram, Wengert
Jürgen, Muller
Matthias, Winkel
Christoph, Ryuhard
Bertram, Wengert
Jürgen, Muller
Application Number:
JP2000569150A
Publication Date:
August 12, 2009
Filing Date:
August 28, 1999
Export Citation:
Assignee:
ZF FRIEDRICHSHAFEN AG
International Classes:
F16H61/02; F16H59/36; F16H59/52; F16H59/56; G06F7/00; F16H59/04; F16H59/14; F16H59/16; F16H59/48; F16H59/66; F16H59/70; F16H61/68
Domestic Patent References:
| JP9249050A | ||||
| JP61253230A | ||||
| JP62261551A | ||||
| JP60215435A | ||||
| JP62194961U | ||||
| JP2002524707A |
Attorney, Agent or Firm:
Kenji Yoshitake
Hiroyuki Nagai
Junpei Okada
Satoshi Nazuka
Hideyuki Mori
Hirohito Katsunuma
Hiroyuki Nagai
Junpei Okada
Satoshi Nazuka
Hideyuki Mori
Hirohito Katsunuma