System and method for controlling driving of electronic 4-wheel drive hybrid vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorDong Jun Shin
Life of this patent
Estimating the term…
Abstract
A system and method for controlling driving of an electronic 4-wheel drive hybrid vehicle appropriately executes torque distribution and compensation to front wheels and rear wheels in each gear position to satisfy driver's requested torque depending on selected driving mode of the electronic 4-wheel drive hybrid vehicle in which an engine and a front wheel motor are connected to the front wheels and a rear wheel motor is connected to the rear wheels, thereby being capable of increasing acceleration performance when a sports mode is selected as the driving mode and realizing acceleration linearity when a comfort mode is selected as the driving mode.
Claims15
A system for controlling driving of an electronic 4-wheel drive hybrid vehicle, the system comprising:
- a first powertrain apparatus for front wheels, wherein the first powertrain apparatus includes an engine, a front wheel motor, an engine clutch mounted between the engine and the front wheel motor to transmit or cut off power of the engine, and a transmission mounted between the front wheel motor and the front wheels and configured to shift the power of the engine and power of the front wheel motor and to output the shifted powers to the front wheels;
- a second powertrain apparatus for rear wheels, wherein the second powertrain apparatus includes a rear wheel motor, and a reducer connected to the rear wheel motor and configured to reduce power of the rear wheel motor and to output the reduced power to the rear wheels;
- and
- a controller configured to control the driving of the electronic 4-wheel drive hybrid vehicle to further output rear wheel torque determined according to rear wheel motor torque for satisfying driver's requested torque in addition to front wheel torque determined according to maximum engine torque and maximum front wheel motor torque, upon determining that a first mode in which acceleration performance is preferentially considered is selected as a driving mode, and configured to control the driving of the electronic 4-wheel drive hybrid vehicle to further output rear wheel compensation torque determined according to deviation between front wheel torque in a current gear position at a point in time before shifting and front wheel torque in a previous gear position at a point in time before shifting in addition to a front wheel torque due to driving of the engine and the front wheel motor in each of a second gear position and higher gear positions, upon determining that a second mode in which acceleration linearity is preferentially considered is selected as the driving mode.
A method for controlling driving of an electronic 4-wheel drive hybrid vehicle including a first powertrain apparatus for front wheels, wherein the first powertrain apparatus includes an engine, a front wheel motor, an engine clutch mounted between the engine and the front wheel motor to transmit or cut off power of the engine, and a transmission mounted between the front wheel motor and the front wheels and configured to shift the power of the engine and power of the front wheel motor and to output the shifted power to the front wheels, and a second powertrain apparatus for rear wheels, wherein the second powertrain apparatus includes a rear wheel motor, and a reducer connected to the rear wheel motor and configured to reduce power of the rear wheel motor and to output the reduced power to the rear wheels, the method comprising:
- selecting a driving mode;
- controlling, by a controller, the driving of the electronic 4-wheel drive hybrid vehicle in a first mode in which acceleration performance is preferentially considered, to further output rear wheel torque determined according to rear wheel motor torque for satisfying driver's requested torque in addition to front wheel torque determined according to maximum engine torque and maximum front wheel motor torque, upon determining that the first mode is selected as a driving mode;
- and
- controlling, by the controller, driving of the electronic 4-wheel drive hybrid vehicle in a second mode in which acceleration linearity is preferentially considered, to further output rear wheel compensation torque determined according to deviation between front wheel torque in a current gear position at a point in time before shifting and front wheel torque in a previous gear position at a point in time before shifting in addition to a front wheel torque due to driving of the engine and the front wheel motor in each of a second gear position and higher gear positions, upon determining that the second mode is selected as the driving mode.
Dependencies are inferred from the claim text.