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US 2003/0114271 A1Published application
Vehicle power transmission device
AssigneeIsuzu Motors Limited
InventorsEiji Inoue, Takumi Shinojima, Satoshi Kishi
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AssigneeIsuzu Motors Limited
InventorsEiji Inoue, Takumi Shinojima, Satoshi Kishi
Estimating the term…
It is an object of the present invention to achieve stabilization of clutch transmission torque at the point of half clutch completion during a garage shift upon vehicle start up, and to thereby achieve smooth clutch engagement. In a vehicle power transmission device in which a fluid coupling and a wet friction clutch are provided in series at points on a power transmission path which extends from an engine to a transmission, and which performs engagement/disengagement control of the clutch by varying the pressure of operating fluid used for engagement/disengagement driving the clutch in accordance with duty pulse signals outputted from an electronic control unit, clutch engagement control is begun at the same time as (t1) the transmission is put into gear in a state of clutch disengagement when a vehicle is about to start up from a standstill. When the difference in rotation between the input and output sides of the fluid coupling reaches or exceeds a predetermined value (t3) during this clutch engagement control, a duty Dc corresponding to full clutch engagement is outputted from the electronic control unit.
A vehicle power transmission device in which a fluid coupling and a wet friction clutch are provided in series at points on a power transmission path which extends from an engine to a transmission, and which performs engagement/disengagement control of the clutch by varying the pressure of operating fluid used for engagement/disengagement driving the clutch in accordance with duty pulse signals outputted from an electronic control unit,
A clutch control method for performing engagement/disengagement control of a clutch in accordance with duty pulse signals outputted from an electronic control unit, this method being used in a vehicle power transmission device in which a fluid coupling and a wet friction clutch are provided in series at points on a power transmission path which extends from an engine to a transmission,
A power transmission device in which a fluid coupling and a friction-type clutch capable of performing engagement/disengagement control are provided in series at points on a power transmission path,
Dependencies are inferred from the claim text.