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Torque converter slip rate based skip power downshift
Torque converter slip rate based skip power downshift
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机译:基于变矩器滑移率的跳跃功率降档
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摘要
A power downshift control method/system strategy (Figure 6), based upon sensed torque converter slip (TC slip) is provided for an automated mechanical transmission system (12) including an engine (16), a mechanical transmission (14) and a torque converter (20) drivingly interposed the engine and transmission. At the beginning of a power downshift, the target gear is derived from the TC_slip, vehicle deceleration, current gear and operator throttle demand. These four vehicle conditions are parameters of a four dimensional matrix such that increasing values of each parameter promote a greater potential for skip power downshifting.
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