%0 Journal Article
%T Analysis on the gear-shifting schedule of hydraulic automatic transmission<br>Analysis on the gear-shifting schedule of hydraulic automatic transmission
%A 席军强
%A 唐高强
%A 翟涌
%A 张国鑫
%A 顾宏弢
%J 北京理工大学学报（自然科学中文版)
%D 2016
%R 10.15918/j.jbit1004-0579.201625.0107
%X With an advanced foreign hydraulic automatic transmission as the objective, an analytical method for the gear-shifting schedule is proposed. First the demanded maximum gradient of test is estimated. Then a test scheme and analytical procedure is formulated by initial test and hypothetical shift parameters. Finally through gear-shifting tests under different road conditions, load, accelerator pedal position limitation, throttle opening and output shaft speed are found to be the gear-shifting parameters. Under a common road condition, the gear-shifting schedule is a double-parameter schedule. Based on the driver's demands on braking and dynamic performance, different shift schedules are made under downhill, uphill and quick releasing acceleration pedal conditions. The operation criteria of down-shift schedule on abrupt grade are proposed.<br>With an advanced foreign hydraulic automatic transmission as the objective, an analytical method for the gear-shifting schedule is proposed. First the demanded maximum gradient of test is estimated. Then a test scheme and analytical procedure is formulated by initial test and hypothetical shift parameters. Finally through gear-shifting tests under different road conditions, load, accelerator pedal position limitation, throttle opening and output shaft speed are found to be the gear-shifting parameters. Under a common road condition, the gear-shifting schedule is a double-parameter schedule. Based on the driver's demands on braking and dynamic performance, different shift schedules are made under downhill, uphill and quick releasing acceleration pedal conditions. The operation criteria of down-shift schedule on abrupt grade are proposed.
%K hydraulic automatic transmission vehicle test gear-shifting parameters gear-shift schedule&lt
%K br&gt
%K hydraulic automatic transmission vehicle test gear-shifting parameters gear-shift schedule
%U http://journal.bit.edu.cn/yw/bjlgyw/ch/reader/view_abstract.aspx?file_no=20160107&flag=1