A brake system controller for a ground vehicle has a braking map based upon brake input position (e.g. pedal position) and rolling resistance coefficient (fr) where braking force = mass*g*fr*Cosθ. A required brake torque module outputs a required braking torque based upon this map. A first brake torque control module receives a signal representing at least part of the required braking torque and outputs a first brake output signal. The controller may include a second torque control module, and the first and second modules may correspond to friction braking and regenerative braking respectively. Said friction braking control module may receive a signal for actual regenerative braking torque and base the first brake output signal at least in part on the actual regenerative braking torque. The required braking torque may be further based on a dynamic rolling radius of a wheel and/or gross vehicle weight. Also disclosed is a brake system utilizing the abovementioned controller, a vehicle utilizing said controller, a method of generating a brake output signal for a braking system, computer readable medium which stores the abovementioned braking map, and a method of generating a rolling resistance map by performing one or more coast down tests.
A brake system controller, a brake system, a vehicle, a method, and a computer readable medium
2018-04-04
Patent
Electronic Resource
English
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / 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 |
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