System and method for vehicle control
AssigneesHyundai Motor Company, Kia Corporation
InventorsSunghwa Jeong, Ho Young Kim
Life of this patent
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Abstract
A vehicle control system for driving stabilization on a low-friction road includes a driving information detector configured to detect a wheel speed of a vehicle during driving of the vehicle. The vehicle control system also includes a transmission management system (TMS) configured to operate a maximum shift stage limit logic and a shift speed relief logic of a transmission of the vehicle by preemptive response when detecting a minute wheel slip according to an analysis of the wheel speed. The vehicle control system additionally includes an engine management system (EMS) configured to control a maximum engine torque limit (ETL) and an engine torque request (ETR) limit of an engine according to a TMS-EMS cooperative control request of the TMS.
Claims13
A vehicle control system for driving stabilization on a low-friction road, the vehicle control system comprising:
- a driving information detector configured to detect a wheel speed of a vehicle during driving of the vehicle;
- a transmission management system (TMS) configured to operate a maximum shift stage limit logic and a shift speed relief logic of a transmission of the vehicle by preemptive response when detecting a wheel slip according to an analysis of the wheel speed, wherein the TMS includes
- a low-friction road detection module configured to determine whether the vehicle enters low-friction road according to a wheel slip detection logic using speed differences between a driving wheel and a non-driving wheel based on the wheel speed, and
- a control module configured to operate the maximum shift stage limit logic to transmit a driving force adapted according to a vehicle speed and a road slope condition when detecting entry into the low-friction road;
- and
- an engine management system (EMS) configured to control a maximum engine torque limit (ETL) and an engine torque request (ETR) limit of an engine of the vehicle according to a TMS-EMS cooperative control request of the TMS.
A vehicle control method for driving stabilization on a low-friction road, the vehicle control method comprising:
- calculating, by a transmission management system (TMS), a vehicle spin according to a wheel slip detection logic by analyzing a wheel speed collected during driving of a vehicle;
- detecting a wheel slip by comparing the vehicle spin with a target spin value;
- operating a maximum shift stage limit logic and a shift speed relief logic of a transmission of the vehicle by preemptive response when detecting the wheel slip;
- and
- controlling a maximum engine torque limit (ETL) and an engine torque request (ETR) limit of an engine of the vehicle by requesting a TMS-EMS cooperative control to an engine management system (EMS),
- wherein detecting the wheel slip includes:
- counting, when the vehicle spin exceeds a target spin value, an excess time of the target spin value;
- determining whether the target spin value excess time is maintained for a reference time;
- and
- detecting when the target spin value excess time is maintained for the reference time.
Dependencies are inferred from the claim text.