Method of controlling a dual clutch transmission

Details Method of controlling a dual clutch transmission Method of controlling a dual clutch transmission

2005-05-03

2005-05-03

Lewis, Tisha (Department: 3681)

Interrelated power delivery controls, including engine control

Clutch control

Condition responsive control

C477S181000, C477S180000, C701S066000, C701S067000

Reexamination Certificate

active

06887184

ABSTRACT:
A method of controlling the clutches of a dual clutch transmission during a two-gear positive downshift, wherein the first clutch drives an initial gear and the final gear and the second clutch drives an intermediate gear. The torque transfer across each clutch is controlled so that the torque output of the transmission will be linearly changed over from the first clutch to the second clutch to cause the engine to track a target engine speed profile. The method changes over the gears driven by the first clutch from the initial gear to the final gear as the engine continues to tracks the target speed. The torque transfer across each clutch is controlled so that the torque output will be linearly changed back from the second clutch to the first clutch in an inversely proportional rate to continue to cause the engine to track the target engine speed profile.

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