Method of determination of driving mode of hybrid vehicle
First Claim
1. A method of determination of a driving mode of a hybrid vehicle, the method being executed by a hybrid control unit (HCU) and comprising the steps of:
- modeling a PNGV (Partnership for a New Generation of Vehicles) systems analysis toolkit (PSAT) to calculate reserved power to drive a motor;
determining whether the driving mode of the hybrid vehicle is consistent with an electric vehicle (LV) mode or not, using the power reserved to drive the motor, which has been calculated using the PSAT model;
if the driving mode is not consistent with the EV mode, determining whether or not the driving mode is consistent with a maximum (MAX) torque mode; and
if the driving mode is not consistent with the MAX torque mode, determining that driving mode to be a hybrid-electric vehicle (HEV) mode; and
wherein said step of determining whether the driving mode is consistent with the MAX torque mode comprises the steps of;
producing an engine MAX torque diagram using engine rpm and storing the engine MAX torque diagram in the HCU;
inputting a present engine output torque;
comparing the present engine output torque to the engine MAX torque of the diagram;
if the present engine output torque is equal to the engine MAX torque, inputting a present engine rpm;
comparing the present engine rpm to an engine MAX torque rpm;
if the present engine rpm is equal to the engine MAX torque rpm, determining that the driving mode is consistent with the MAX torque mode;
inputting a wheel torque calculated using the PSAT model;
calculating a present wheel torque; and
if the wheel torque calculated using the PSAT model is not lower than the present wheel torque, determining that the driving mode is not consistent with the MAX torque mode.
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Abstract
The present invention provides a method of determination of the driving mode of a hybrid vehicle. The method is executed by a hybrid control unit (HCU) and includes the step of modeling a PNGV (Partnership for a New Generation of Vehicles) systems analysis toolkit (PSAT) to calculate power reserved to drive a motor. Thereafter, whether or not the driving mode of the hybrid vehicle is consistent with an electric vehicle (EV) mode is determined using the power reserved to drive the motor, which has been calculated using the PSAT model. If the driving mode is not consistent with the EV mode, whether or not the driving mode is consistent with a maximum (MAX) torque mode is determined. If the driving mode is not consistent with the MAX torque mode, the driving mode is determined to be a hybrid-electric vehicle (HEV) mode.
16 Citations
8 Claims
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1. A method of determination of a driving mode of a hybrid vehicle, the method being executed by a hybrid control unit (HCU) and comprising the steps of:
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modeling a PNGV (Partnership for a New Generation of Vehicles) systems analysis toolkit (PSAT) to calculate reserved power to drive a motor; determining whether the driving mode of the hybrid vehicle is consistent with an electric vehicle (LV) mode or not, using the power reserved to drive the motor, which has been calculated using the PSAT model; if the driving mode is not consistent with the EV mode, determining whether or not the driving mode is consistent with a maximum (MAX) torque mode; and if the driving mode is not consistent with the MAX torque mode, determining that driving mode to be a hybrid-electric vehicle (HEV) mode; and wherein said step of determining whether the driving mode is consistent with the MAX torque mode comprises the steps of; producing an engine MAX torque diagram using engine rpm and storing the engine MAX torque diagram in the HCU; inputting a present engine output torque; comparing the present engine output torque to the engine MAX torque of the diagram; if the present engine output torque is equal to the engine MAX torque, inputting a present engine rpm; comparing the present engine rpm to an engine MAX torque rpm; if the present engine rpm is equal to the engine MAX torque rpm, determining that the driving mode is consistent with the MAX torque mode; inputting a wheel torque calculated using the PSAT model; calculating a present wheel torque; and if the wheel torque calculated using the PSAT model is not lower than the present wheel torque, determining that the driving mode is not consistent with the MAX torque mode. - View Dependent Claims (2, 3)
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4. A method of determination of a driving mode of a hybrid vehicle, the method being executed by a hybrid control unit (HCU) and comprising the steps of:
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modeling a PNGV (Partnership for a New Generation of Vehicles) systems analysis toolkit (PSAT) to calculate reserved power to drive a motor; determining whether the driving mode of the hybrid vehicle is consistent with an electric vehicle (EV) mode or not, using the power reserved to drive the motor, which has been calculated using the PSAT model; if the driving mode is not consistent with the EV mode, determining whether or not the driving mode is consistent with a maximum (MAX) torque mode; and if the driving mode is not consistent with the MAX torque mode, determining that driving mode to be a hybrid-electric vehicle (HEV) mode; and wherein said step of determining whether the driving mode is consistent with the EV mode comprises the steps of; inputting the power-reserved; determining whether the input reserved power is not lower than a preset first reference value; if the input reserved power is not lower than the preset first reference value, inputting the state of charge (SOC) of the battery; determining whether the SOC value of the battery is not lower than a preset second reference value; if the SOC value of the battery is not lower than the preset second reference value, inputting both a present engine rpm and a present engine load; detecting an operating point of both the present engine rpm and the present engine load on an EV mode map; determining whether the operating point of both the present engine rpm and the present engine load is present on the EV mode map; if the operating point of both the present engine rpm and the present engine load is not present on the EV mode map, determining whether the driving mode is consistent with a regeneration mode; if the driving mode is not consistent with the regeneration mode, determining whether a required torque is zero; if the required torque is not zero, determining whether the motor is in an ON state and an engine is in an OFF state; and if the engine is in the OFF state and the motor is not in the ON state, determining that the driving mode is not consistent with the EV mode. - View Dependent Claims (5, 6, 7, 8)
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Specification