Invention Grant
- Patent Title: Method for controlling selection of an automatic transmission gear ratio
- Patent Title (中): 控制自动变速器齿轮比选择的方法
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Application No.: US10535913Application Date: 2003-11-18
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Publication No.: US07529607B2Publication Date: 2009-05-05
- Inventor: Olivier Aubert
- Applicant: Olivier Aubert
- Applicant Address: FR Boulogne Billancourt
- Assignee: Renault S.A.S.
- Current Assignee: Renault S.A.S.
- Current Assignee Address: FR Boulogne Billancourt
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- Priority: FR0214559 20021121
- International Application: PCT/FR03/03412 WO 20031118
- International Announcement: WO2004/048819 WO 20040610
- Main IPC: G06F17/00
- IPC: G06F17/00 ; B60T8/32 ; B60K31/00
Abstract:
A method for controlling selection of an automatic transmission gear ratio with staged ratios or constant variation for a vehicle including a control for preventing/allowing extension of the gear ratio or for controlling a shortening the transmission gear ratio if, at a current engine speed, the power is insufficient for maintaining the vehicle speed. The method prevents extension of the transmission gear ratio if the power available after the extension is insufficient for maintaining the vehicle speed; otherwise allowing extension of the transmission gear ratio.
Public/Granted literature
- US20060155450A1 Method for controlling selection of an automatic transmission gear ratio Public/Granted day:2006-07-13
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