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Method for minimizing driver perceptible drive train disturbances during take-off in a hybrid electric vehicle when maximized power is often desired is disclosed. The method includes sensing an actual state-of-charge (SOC) value of a battery in a hybrid electric vehicle and a traveling velocity of t

Method for minimizing driver perceptible drive train disturbances during take-off in a hybrid electric vehicle when maximized power is often desired is disclosed. The method includes sensing an actual state-of-charge (SOC) value of a battery in a hybrid electric vehicle and a traveling velocity of the vehicle during take-off operation. The sensed actual SOC value is compared with a SOC reference value and computing a delta SOC value as a difference therebetween. A velocity-based SOC calibration factor is looked up that corresponds to the traveling velocity of the vehicle. A combination is utilized of the delta SOC value and the SOC calibration factor as a SOC feedback engine speed control instruction to an engine controller of the hybrid electric vehicle. A driver's desired vehicular acceleration is sensed based on accelerator position. Maximum possible engine power generatable at the sensed vehicle speed is determined, as is a required power value from the power train of the vehicle to meet the driver's desired vehicular acceleration. The maximum possible engine power generatable at the sensed vehicle speed is compared with the required power value and computing a delta power train requirement value as a difference therebetween. A velocity-based and accelerator position-based power calibration factor is looked-up that corresponds to the traveling velocity of the vehicle and the accelerator position. A combination of the delta power train requirement value and the power calibration factor is utilized as a power requirement feed-forward engine speed control instruction to an engine controller of the hybrid electric vehicle.

대표청구항 ▼

1. A method for minimizing driver perceptible drive train disturbances during take-off in a hybrid electric vehicle when maximized power is often desired, said method comprising:sensing an actual state-of-charge (SOC) value of a battery in the hybrid electric vehicle and a traveling velocity of the

1. A method for minimizing driver perceptible drive train disturbances during take-off in a hybrid electric vehicle when maximized power is often desired, said method comprising:sensing an actual state-of-charge (SOC) value of a battery in the hybrid electric vehicle and a traveling velocity of the vehicle during take-off operation; comparing the sensed actual SOC value with a SOC reference value and computing a delta SOC value as a difference therebetween; looking up a velocity-based SOC calibration factor corresponding to the traveling velocity of the vehicle; utilizing a combination of the delta SOC value and the SOC calibration factor as a SOC feedback engine speed control instruction to an engine controller of the hybrid electric vehicle; sensing a driver's desired vehicular acceleration based on accelerator position; determining maximum possible engine power generatable at the sensed vehicle speed; determining a required power value from the power train of the vehicle to meet the driver's desired vehicular acceleration; comparing the maximum possible engine power generatable at the sensed vehicle speed with the required power value and computing a delta power train requirement value as a difference therebetween; looking up a velocity-based and accelerator position-based power calibration factor corresponding to the traveling velocity of the vehicle and the accelerator position; and utilizing a combination of the delta power train requirement value and the power calibration factor as a power requirement feed-forward engine speed control instruction to an engine controller of the hybrid electric vehicle.