METHOD FOR DISTRIBUTING TORQUE IN 4WD MILITARY VEHICLE DRIVEN BY ELECTRIC POWER

• Main Authors: JEONG, SOON KYU, YEO, SEUNG TAI, HAN, KYU HONG, JANG, MYEONG EON
• Format: Patent
• Language: English; Korean
• Published: 16.01.2014
• 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

The present invention relates to an apparatus and a method for distributing torque in an electric military vehicle with four wheels which distribute the torque to the front and rear wheels of an electric vehicle in consideration of the efficiency of a motor and the gradient of a road whereon the electric vehicle runs. According to the present invention, the method for distributing the torque in an electric military vehicle with four wheels comprises: an efficiency-first torque distribution rate calculating step (S120) for distributing driving torque to front and rear motors (11, 21) to operate the front and rear motors (11, 21) with high efficiency; a gradient-first torque distribution rate calculating step (S130) for distributing the driving torque required for operating an electric vehicle on the front and rear motors (11, 21) using a value predetermined according to the gradient of the road where the electric vehicle runs; a gradient determining step (S140) for comparing the gradient of the road where the electric vehicle runs with a reference value and determining wheel slip conditions when the electric vehicle runs on the gradient road; and a torque distribution step (S150) for controlling the front and rear motors (11, 21) using the rate calculated in the efficiency-first torque distribution rate calculating step (S120) according to the gradient determined in the gradient determining step (S140) or controlling the front and rear motors (11, 21) according to the rate calculated in the gradient-first torque distribution rate calculating step (S130). [Reference numerals] (AA) Start; (BB) End; (S110) Measuring a gradient; (S120) Calculating the torque distribution according to the efficiency of a motor; (S130) Calculating the torque distribution according to the gradient; (S141) Within a reference range of the gradient?; (S142) Gradient > (+) standard value & T_fme<T_fms; (S143) Gradient > (-) standard value & T_fme<T_fms; (S151) Torque distribution according to the efficiency of the motor; (S152) Torque distribution according to the gradient; (S160) System is finished?