Control device and method for hybrid electric vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsJae Young Choi, Gwang Il Du, Hoon Han
Life of this patent
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Abstract
The present invention relates to a control device and method of a hybrid electric vehicle (HEV) to which Downhill Brake Control (DBC) is applied, and determines whether to perform a braking control of the HEV, by comparing a current vehicle speed of the HEV with a target vehicle speed of the HEV upon operating a DBC function, calculates a braking demand amount based on a difference between the current vehicle speed and the target vehicle speed when the braking control is determined, and controls a vehicle speed of the HEV by determining whether to perform cooperative control of a regenerative braking and a brake hydraulic braking, based on the braking demand amount and a maximum regenerative braking possible amount.
Claims17
A control device of a hybrid electric vehicle (HEV), the control device comprising:
- a processor;
- and
- a storage connected to the processor and configured to store instructions executed by the processor,
- wherein the processor is configured to:
- determine a target vehicle speed of the HEV based on a shifting gear upon operating a Downhill Brake Control (DBC) function;
- determine whether to perform a braking control of the HEV, by comparing a current vehicle speed of the HEV with the target vehicle speed of the HEV;
- determine a braking demand amount according to a difference between the current vehicle speed and the target vehicle speed when the braking control is determined to be performed;
- and
- control a vehicle speed of the HEV by determining whether to perform cooperative control of a regenerative braking and a hydraulic braking, according to the braking demand amount and a maximum regenerative braking possible amount.
A method for controlling a hybrid electric vehicle (HEV), the method including:
- determining a target vehicle speed of the HEV based on a shifting gear upon operating a Downhill Brake Control (DBC) function;
- determining whether to perform a braking control of the HEV, by comparing a current vehicle speed of the HEV with the target vehicle speed of the HEV;
- determining a braking demand amount according to a difference between the current vehicle speed and the target vehicle speed when the braking control is determined to be performed;
- and
- controlling, by a control device, a vehicle speed of the HEV by determining whether to perform cooperative control of a regenerative braking and a hydraulic braking, according to the braking demand amount and a maximum regenerative braking possible amount.
Dependencies are inferred from the claim text.