Invention Grant
US07676313B2 Target speed control strategy for power-off shifts in a hybrid electric vehicle 有权
混合动力汽车的停电班车目标速度控制策略

Target speed control strategy for power-off shifts in a hybrid electric vehicle
Abstract:
A method for controlling a power-off shift from a current gear to a target gear in a hybrid electric powertrain including an engine, electric motor and automatic transmission includes the steps of determining an initial target speed for the current gear, operating the motor at the initial target speed, repetitively determining a current gear ratio, a output shaft speed during the gear ratio change, a time rate of change of output shaft speed, using the current gear ratio, the current speed of the output shaft and the time rate of change of output shaft speed repetitively to determine a current target speed, and operating the motor at the current target speed until a gear change to the next gear is completed.
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