A vehicle regenerative braking control system limits the maximum regenerative braking force which can be applied to each wheel of the vehicle. A memory 202 stores a tyre model 210, and a controller 202 receives data from at least one sensor (e.g. tyre pressure sensor 206, tyre temperature sensor 208, axle load sensor 212) associated with each wheel of the vehicle, and the data is input into the tyre model. The controller uses the tyre model to determine a maximum usable traction for each wheel and calculate the maximum regenerative braking force to be applied to each wheel, wherein the braking force is limited according to the calculation. The tyre model may comprise a maximum tolerated slip ratio, which may be set dynamically using sensor information, and which is used by the controller to limit an output of the tyre model when calculating the maximum regenerative braking force for each wheel. The controller may receive data relating to surface conditions under the wheels, which is input into the tyre model and used to determine the maximum usable traction for each wheel. The surface condition data may be received from one or more optical sensors (e.g. camera 216) that image the vehicles external environment.
Regenerative braking control system
2022-10-26
Patent
Electronic Resource
English
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
Regenerative braking control method and regenerative braking control device
European Patent Office | 2022
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