TORQUE DISTURBANCE MANAGEMENT SYSTEM AND METHOD

• Main Authors: Zhang, Chen, Yamazaki, Mark Steven
• Format: Patent
• Language: English
• Published: 09.08.2018
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRANSPORTING; VEHICLES IN GENERAL

A hybrid electric vehicle has a powertrain including an internal combustion engine, an electric machine, and a transmission coupled to controller(s) that control torque disturbances arising from changing output torques of the engine, electric machine, and transmission. A torque disturbance threshold is adjusted for driver comfort, and is used to respond to torque demand signals from the vehicle systems, including a battery charging subsystem, and a driver. The controller(s) respond to battery charge and driver demand torque signals, among others, and adjust engine and electric machine torque at a controlled rate and magnitude, using charge-torque-slew-rate, charge-torque, and other limits. Battery charging is similarly managed. The slew-rate, charge-torque, and other limits are adjusted as the torque disturbance threshold changes in response to changing performance of vehicle components, which thereby controls torque disturbances to be lower than the torque disturbance threshold for a plurality of engine, electric machine, and transmission operating conditions.