发明名称 |
Hydraulic fluid change indicating device for automatic transmission |
摘要 |
A hydraulic fluid change indicating device for an automatic transmission includes a first deterioration rate calculating unit; a deterioration acceleration coefficient calculating unit; and a thermal hydraulic fluid deterioration calculating unit for calculating a thermal hydraulic fluid deterioration according to the first deterioration rate and the deterioration acceleration coefficient. The device further includes a second deterioration rate calculating unit according to an engine speed, input shaft speed, and output shaft speed; a mechanical hydraulic fluid deterioration calculating unit for calculating a mechanical fluid deterioration according to the second deterioration rate; and a determining unit for determining whether or not the thermal hydraulic fluid deterioration or the mechanical hydraulic fluid deterioration is greater than a predetermined hydraulic fluid change threshold.
|
申请公布号 |
US7433770(B2) |
申请公布日期 |
2008.10.07 |
申请号 |
US20040002701 |
申请日期 |
2004.12.03 |
申请人 |
HONDA MOTOR CO., LTD. |
发明人 |
INAGAWA YASUSHI;FURUMOTO MITSUMASA;KOYAMA HIDEO;TAKAGI YOSHIARI |
分类号 |
G06F7/00;F16H57/02;F16H57/04;G01N33/28;G06F17/00 |
主分类号 |
G06F7/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|