发明名称 |
Shift control system and shift control method for continuously variable transmission |
摘要 |
<p>A maximum flow calculating unit (166) calculates a maximum amount (Qmax) of hydraulic fluid that can flow into or out of an input-side hydraulic cylinder (42c) when a shift control command signal (S T ) is set to a reference DUTY value, based on an estimated valve pressure difference (”P) calculated by an estimated pressure difference calculating unit (156), and a post-guard target sheave position setting unit (170) performs a guard process for restricting the amount of change of the sheave position, using a guard value (”Xg) calculated by a guard value calculating unit (168) based on the maximum flow amount (Qmax), so as to set a post-guard target sheave position (Xtg). Since the thus set target sheave position (Xtg) does not undergo excessive large changes nor excessively small changes during shifting, a target value for shifting is set so that a feedforward controlled variable determined based on the amount of change of the target sheave position (Xtg) becomes an appropriate value.</p> |
申请公布号 |
EP1878952(B1) |
申请公布日期 |
2011.12.28 |
申请号 |
EP20070252430 |
申请日期 |
2007.06.14 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
TANAKA, NAOTO;TANIGUCHI, HIROJI;TOYODA, SHINYA;TAMURA, TADASHI;HINO, AKIRA;MATSUI, YASUNARI |
分类号 |
F16H61/662;F16H61/02 |
主分类号 |
F16H61/662 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|