Title:
自動変速機においてオーバーラップ切換式にシフトアップする際のクラッチ圧の適合方法
Document Type and Number:
Japanese Patent JP4536254
Kind Code:
B2
Abstract:
A method for pressure adaptation is proposed for an automatic transmission. The gear shifts here are carried out as overlapping gear shifts with a first opening (K1) and a second closing (K2) clutch, the overlapping gear shift consisting of a first and a second phase. During the first phase, a banking of the transmission input rotational speed (nT) is adjusted. The invention proposes that upon issuance of the shift command, a time period (t2) is determined until the transmission input rotational speed has reached the banking value (dn). This is compared with a predetermined time (tAD) during which a difference is obtained which provided with a sign is totaled in a summation memory. An adaptation value is stored in a correction value memory when the summation memory exceeds a limit value. As consequence of this, the disconnection pressure level (pAB) of the first clutch (K1) is adapted in subsequent gear shifts.
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Inventors:
Georg, Gearer
Christian, Pop
Christian, Pop
Application Number:
JP2000515130A
Publication Date:
September 01, 2010
Filing Date:
October 05, 1998
Export Citation:
Assignee:
ZF FRIEDRICHSHAFEN AG
International Classes:
F16H61/08; F16H59/42; F16H61/06; F16H63/12; F16H59/14; F16H59/24; F16H59/40; F16H59/72; F16H61/00
Domestic Patent References:
| JP9119515A | ||||
| JP7139616A | ||||
| JP9089093A |
Attorney, Agent or Firm:
Kenji Yoshitake
Hirohito Katsunuma
Hiroyuki Nagai
Junpei Okada
Katsuomi Isogai
Hirohito Katsunuma
Hiroyuki Nagai
Junpei Okada
Katsuomi Isogai