Invention Grant
- Patent Title: Transmission device and control method for continuously variable transmission
- Patent Title (中): 无级变速器传动装置及控制方法
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Application No.: US12138832Application Date: 2008-06-13
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Publication No.: US07935023B2Publication Date: 2011-05-03
- Inventor: Kiyoshi Kurita , Fumihiro Hazu
- Applicant: Kiyoshi Kurita , Fumihiro Hazu
- Applicant Address: JP Tokyo
- Assignee: Aisin AW Co., Ltd.
- Current Assignee: Aisin AW Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2007-158890 20070615
- Main IPC: F16H61/662
- IPC: F16H61/662

Abstract:
In the case where a belt return of a continuously variable transmission is not determined when the vehicle speed has become equal to or lower than a threshold value, control that causes a hydraulic actuator to have an intermediate pressure by setting a duty of a duty solenoid based on an input torque and an oil temperature and closing control are repeatedly performed, in accordance with the running and the stopping of the vehicle. As a result, it is possible to inhibit the continuously variable transmission from being shifted up due to a gradual increase in the hydraulic pressure in the hydraulic actuator caused by a line pressure seeping to the hydraulic actuator side through a small clearance in a spool of a flow rate control valve in a hydraulic circuit, and it is also possible to allow the continuously variable transmission to be shifted down.
Public/Granted literature
- US20080312030A1 TRANSMISSION DEVICE AND CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION Public/Granted day:2008-12-18
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