Hybrid electric vehicle and method of driving control therefor
AssigneesHyundai Motor Company, Kia Corporation
InventorsTae Jun Ahn, Jong Bum Oh
Life of this patent
Estimating the term…
Abstract
Disclosed are a hybrid electric vehicle and a driving control method therefor, which are capable of switching to a driving mode and performing a kick-down shift more quickly. In particular, the method for controlling the hybrid electric vehicle includes: determining a first motor directly connected to an engine and an available torque in a target gear of each second motors connected to the first motor when a driving mode is changed from an electric vehicle (EV) mode to a hybrid electric vehicle (HEV) mode and a kick-down shift is required simultaneously; and determining operating points of the first motor and the second motor before an actual shift ends, based on the determined available torque and the type of kick-down shift.
Claims19
A method for controlling a hybrid electric vehicle, the method comprising:
- in response to switching from an electric vehicle (EV) mode to a hybrid electric vehicle (HEV) mode and receiving an input indicative of a kick-down shift from a transmission control unit, determining an available torque in a target gear for each of a first motor and a second motor, wherein the first motor is directly connected to an engine and the second motor is configured to be connected to the first motor in the HEV mode by engaging an engine clutch disposed between the first motor and the second motor;
- determining operating points of the first motor and the second motor before an actual shift of a stepped transmission ends, based on the determined respective available torques and types of the kick-down shift;
- and
- controlling the first motor and the second motor based on the determined operating points until the actual shift ends.
A non-transitory computer-readable recording medium configured to record a program, the program to direct a processor to perform acts of:
- in response to switching from an electric vehicle (EV) mode to a hybrid electric vehicle (HEV) mode and receiving an input indicative of a kick-down shift from a transmission control unit, determining an available torque in a target gear for each of a first motor directly connected to an engine and a second motor, wherein the first motor is directly connected to an engine and the second motor is configured to be connected to the first motor in the HEV mode by engaging an engine clutch disposed between the first motor and the second motor;
- determining operating points of the first motor and the second motor before an actual shift of a stepped transmission ends, based on the determined respective available torques and types of the kick-down shift;
- and
- controlling the first motor and the second motor based on the determined operating points until the actual shift ends.
A hybrid electric vehicle comprising:
- an engine;
- a first motor directly connected to the engine;
- a second motor configured to be connected to the first motor in a hybrid electric vehicle (HEV) mode;
- a stepped transmission of which an input terminal is connected to the second motor;
- an engine clutch disposed between the first motor and the second motor, wherein the second motor is configured to be connected to the first motor in the HEV mode by engaging the engine clutch;
- a control unit configured to:
- in response to switching a driving mode from an electric vehicle (EV) mode to the hybrid electric vehicle (HEV) mode and receiving an input indicative of a kick-down shift from a transmission control unit, determine an available torque in a target gear for each of the first motor and the second motor, respectively;
- determine operating point of the engine, the first motor, and the second motor before an actual shift of the stepped transmission ends, based on the determined respective available torques and a type of kick-down shift;
- and control the first motor and the second motor based on the determined operating points until the actual shift ends.
Dependencies are inferred from the claim text.