Back to results
US 11,787,410 B1Granted
Torque distribution method for vehicle
AssigneesHyundai Motor Company, Kia Corporation
InventorsJi Won Oh, Young Joon Chang, Jeong Soo Eo
Life of this patent
Estimating the term…
Abstract
In a torque distribution method for a vehicle, torque is optimally distributed to front and rear wheels of a vehicle by reflecting pitch motion characteristics and longitudinal load movement information of the vehicle in real time. The repetition of wheel slip and the degradation of wheel slip control performance caused by the pitch motion are reduced. The longitudinal load movement of the vehicle is reduced.
Claims20
A torque distribution method for a vehicle, the method comprising:
- determining a natural frequency of a vehicle suspension pitch motion according to characteristics of a suspension of the vehicle;
- providing a filter or a transfer function model for extracting or enhancing a natural frequency component of the vehicle suspension pitch motion to a controller of the vehicle;
- determining, by the controller, a distribution ratio correction value using an output of a process of the filter or the transfer function model including an input of a total torque applied by a drive device to a drive system;
- correcting, by the controller, at least one of a front wheel torque distribution ratio and a rear wheel torque distribution ratio based on the determined distribution ratio correction value;
- and
- distributing, by the controller, a target torque command to a front wheel torque command and a rear wheel torque command based on the corrected torque distribution ratio while driving of the vehicle.
3 more elements
A torque distribution apparatus for a vehicle, the apparatus comprising:
- a drive device connected to drive wheels of the vehicle and configured to generate torque for driving wheels of the vehicle;
- a sensor configured for detecting vehicle driving information;
- a controller connected to the sensor and the drive device and configured for:
- determining a natural frequency of a vehicle suspension pitch motion according to characteristics of a suspension of the vehicle;
- determining a distribution ratio correction value using an output of a process of a filter or a transfer function model including an input of a total torque applied by the drive device to a drive system, wherein the filter or the transfer function model is configured for extracting or enhancing a natural frequency component of the vehicle suspension pitch motion;
- correcting at least one of a front wheel torque distribution ratio and a rear wheel torque distribution ratio based on the determined distribution ratio correction value;
- and
- distributing a target torque command to a front wheel torque command and a rear wheel torque command based on the corrected torque distribution ratio while driving of the vehicle;
- controlling operation of the drive device according to the distributed front driving force command and the distributed rear wheel driving force command so that a target driving force is applied to the wheels;
- and
- a non-transitory storage medium configured for storing an algorithm for an operation of the controller,
- wherein in the correcting of the at least one of the front wheel torque distribution ratio and the rear wheel torque distribution ratio, the controller is configured to determine whether predetermined correction conditions are met based on the vehicle driving information obtained while driving of the vehicle, and when the predetermined correction conditions are met, correct the at least one torque distribution ratio of the front wheel torque distribution ratio and the rear wheel torque distribution ratio.
9 more elements
Dependencies are inferred from the claim text.