Invention Grant
- Patent Title: Vehicular shift control apparatus
- Patent Title (中): 车辆换挡控制装置
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Application No.: US13683547Application Date: 2012-11-21
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Publication No.: US08849524B2Publication Date: 2014-09-30
- Inventor: Kunio Hattori , Shinya Toyoda , Taira Iraha
- Applicant: Kunio Hattori , Shinya Toyoda , Taira Iraha
- Applicant Address: JP Toyota-shi
- Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee Address: JP Toyota-shi
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Main IPC: G06F7/00
- IPC: G06F7/00 ; F16H61/00 ; F16H61/662

Abstract:
A vehicular shift control apparatus configured to control a speed ratio of a belt-type transmission having first and second variable-diameter pulleys, and a transmission belt wound between the first and second variable-diameter pulleys, by controlling hydraulic pressures to be applied to respective hydraulic cylinders of said first and second variable-diameter pulleys, according to respective commanded hydraulic pressure values of the first and second variable-diameter pulleys, such that the speed ratio coincides with a target value, the vehicular shift control apparatus includes a shift control portion configured to be operable, when a first-variable-diameter-pulley hold pressure which permits the speed ratio of said belt-type transmission to be held at the target value in a shift-down action is determined as said commanded hydraulic pressure value of the first variable-diameter pulley, to temporarily reduce said commanded hydraulic pressure value with respect to said first-variable-diameter-pulley hold pressure in an initial period of said shift-down action.
Public/Granted literature
- US20130080004A1 VEHICULAR SHIFT CONTROL APPARATUS Public/Granted day:2013-03-28
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