# US 2014/0191689 A1 · Vehicle driving device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191689 A1 - Document ID: US20140191689A1 - Status: Published application - Kind: A1 - Application number: 14/129,498 - Filed: 2012-07-04 - Published: 2014-07-10 - Earliest claimed: 2011-07-04 - Assignees: Honda Motor Co., Ltd. - Inventors: Masatoshi Noguchi; Satoshi Ando; Masayuki Kikuchi - Web page: https://patentgrep.com/patent/US20140191689A1 ## CPC - B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} - B60K 6/448: Electrical distribution type - B60K 6/52: Driving a plurality of drive axles, e.g. four-wheel drive - B60K 7/0007: {the motor being electric} - B60K 17/046: {with planetary gearing having orbital motion} - B60L 15/2036: {Electric differentials, e.g. for supporting steering vehicles} - B60L 50/16: with provision for separate direct mechanical propulsion - B60L 58/15: Preventing overcharging - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/16: Axle differentials, e.g. for dividing torque between left and right wheels - B60W 20/13: in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion - B60W 30/1843: {Overheating of driveline components (B60W30/186 takes precedence)} - H02P 5/68: controlling two or more DC dynamo-electric motors (H02P5/46, H02P5/60 take precedence) - B60K 2007/0046: {the motor moving together with the vehicle body, i.e. moving independently from the wheel axle} - B60K 2007/0092: {the motor axle being coaxial to the wheel axle} - B60L 2220/46: Wheel motors, i.e. motor connected to only one wheel - B60W 20/50: Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode - B60W 30/045: Improving turning performance - B60W 2050/0091: {of control inputs} - B60W 2510/244: Charge state - B60W 2520/30: Wheel torque - B60W 2720/406: between left and right wheel - B60Y 2400/427: One-way clutches - Y02T 10/62: Hybrid vehicles - Y02T 10/64: Electric machine technologies in electromobility - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 10/72: Electric energy management in electromobility - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The rear wheel driving device 1 includes: an electric motor 2A connected to a left rear wheel LWr; an electric motor 2B connected to a right rear wheel RWr; and a control device 8 for controlling the electric motors 2A and 2B. The control device 8 controls the electric motors 2A and 2B such that a third relationship is satisfied as the first priority based on at least either a first relationship or a second relationship, and the third relationship. The first relationship is defined as including a sum of right and left wheel torques, a sum of right and left motor generator torques, a sum of right and left wheel driving forces, or a sum of right and left motor generator driving forces. The second relationship is defined as including a difference between right and left wheel torques, a difference between right and left motor generator torques, a difference between right and left wheel driving forces, or a difference between right and left motor generator driving forces. The third relationship is defined as including a sum of a left electric power which is generated or consumed by the left motor generator and a right electric power which is generated or consumed by the right motor generator. ## Claims ### Claim 1 A vehicle driving device comprising: a left motor generator connected to a left wheel of a vehicle; a right motor generator connected to a right wheel of the vehicle; and a control device for controlling the right and left motor generators, wherein the control device performs an electric power-prioritized control for controlling the right and left motor generators such that a third relationship is satisfied as the first priority based on at least either a first relationship or a second relationship and the third relationship, wherein the first relationship is defined as including a sum of right and left wheel torques, a sum of right and left motor generator torques, a sum of right and left wheel driving forces, or a sum of right and left motor generator driving forces, wherein the second relationship is defined as including a difference between right and left wheel torques, a difference between right and left motor generator torques, a difference between right and left wheel driving forces, or a difference between right and left motor generator driving forces, and wherein the third relationship is defined as including a sum of a left electric power which is generated or consumed by the left motor generator and a right electric power which is generated or consumed by the right motor generator. ### Claim 2 (depends on 1) The vehicle driving device of claim 1, further comprising: a power source electrically connected to the right and left motor generators, and wherein the electric power-prioritized control is performed in accordance with a state of the power source. ### Claim 3 (depends on 2) The vehicle driving device of claim 2, wherein the power source is a battery, and wherein the electric power-prioritized control is performed in accordance with a state of the battery. ### Claim 4 (depends on 3) The vehicle driving device of claim 3, wherein when a storage state of the battery is equal to or lower than a given level, the electric power-prioritized control is performed such that the sum of the left electric power and the right electric power in the third relationship becomes zero or more, where generation of electric power is defined as a positive value. ### Claim 5 (depends on 3) The vehicle driving device of claim 3, wherein when a storage state of the battery is equal to or higher than a given level, the electric power-prioritized control is performed such that the sum of the left electric power and the right electric power in the third relationship becomes zero or less, where generation of electric power is defined as a positive value. ### Claim 6 (depends on 3) The vehicle driving device of claim 3, wherein the electric power-prioritized control is performed in accordance with allowable input and output of the battery such that the sum of the left electric power and the right electric power in the third relationship falls within a range of the allowable input and output. ### Claim 7 (depends on 3) The vehicle driving device of claim 3, wherein when a temperature of the battery is equal to or lower than a given temperature, the electric power-prioritized control is performed such that the sum of the left electric power and the right electric power in the third relationship becomes zero. ### Claim 8 (depends on 3) The vehicle driving device of claim 3, wherein when a failure in the battery is detected, the electric power-prioritized control is performed such that the sum of the left electric power and the right electric power in the third relationship becomes zero. ### Claim 9 (depends on 2) The vehicle driving device of claim 2, wherein the power source is another motor generator different from the right and left motor generators, and the electric power-prioritized control is performed in accordance with a state of the another motor generator. ### Claim 10 (depends on 9) The vehicle driving device of claim 9, wherein when an electric power generation state of the another motor generator is equal to or lower than a given level, the electric power-prioritized control is performed such that the sum of the left electric power and the right electric power in the third relationship becomes zero or more, where generation of electric power is defined as a positive value. ### Claim 11 (depends on 9) The vehicle driving device of claim 9, wherein the electric power-prioritized control is performed in accordance with an allowable electric power generation output of the another motor generator such that the sum of the left electric power and the right electric power in the third relationship falls within a range of the allowable electric power generation output. ### Claim 12 (depends on 9) The vehicle driving device of claim 9, wherein when a failure in the another motor generator is detected or the another motor generator is in a power driving state, the electric power-prioritized control is performed such that the sum of the left electric power and the right electric power in the third relationship becomes zero or more, where generation of electric power is defined as a positive value. ### Claim 13 (depends on 1) The vehicle driving device of claim 1, wherein the electric power-prioritized control is performed such that the sum of the left electric power and the right electric power in the third relationship becomes zero. ### Claim 14 (depends on 1) The vehicle driving device of claim 1, wherein the electric power-prioritized control is performed such that the sum of the left electric power and the right electric power in the third relationship reaches a given target electric power. ### Claim 15 (depends on 1) The vehicle driving device of claim 1, wherein in the electric power-prioritized control, the right and left motor generators are controlled such that the first relationship is satisfied as the second priority. ### Claim 16 (depends on 15) The vehicle driving device of claim 15, wherein at the time of deceleration of the vehicle, the control is performed such that the third relationship is satisfied as the first priority and the first relationship is satisfied as the second priority. ### Claim 17 (depends on 1) The vehicle driving device of claim 1, wherein in the electric power-prioritized control, the right and left motor generators are controlled such that the second relationship is satisfied as the second priority. ### Claim 18 (depends on 17) The vehicle driving device of claim 17, wherein at the time of acceleration of the vehicle, the control is performed such that the third relationship is satisfied as the first priority and the second relationship is satisfied as the second priority. ### Claim 19 (depends on 1) The vehicle driving device of claim 1, wherein a left speed changer is provided on a power transmission path between the left wheel and the left motor generator, wherein a right speed changer is provided on a power transmission path between the right wheel and the right motor generator, wherein each of the right and left speed changers is a planetary gear type speed changer including first to third rotation elements, wherein the right and left motor generators are connected to the first rotation elements of the right and left speed changers, respectively, wherein the right and left wheels are connected to the second rotation elements of the right and left speed changers, respectively, wherein the third rotation elements of the right and left speed changers are connected to each other, and wherein a connection/disconnection means and a one-way power transmission unit are provided in parallel with the third rotation elements, wherein the connection/disconnection means is disengaged or engaged to bring a motor generator side that is composed of the right and left motor generators and a wheel side that is composed of the right and left wheels to a disconnected state or a connected state, wherein the one-way power transmission unit becomes: an engaged state when a forward rotational power is inputted to the wheel side from the motor generator side; a disengaged state when an reverse rotational power is inputted to the wheel side from the motor generator side; the disengaged state when a forward rotational power is inputted to the motor generator side from the wheel side; and the engaged state when an reverse rotational power is inputted to the motor generator side from the wheel side. ### Claim 20 (depends on 19) The vehicle driving device of claim 19, wherein when the sum of the left electric power and the right electric power in the third relationship becomes zero or more, the connection/disconnection means is engaged, where generation of electric power is defined as a positive value. ### Claim 21 (depends on 19) The vehicle driving device of claim 19, wherein when the sum of the left electric power and the right electric power in the third relationship is lower than a given value of zero or less, the connection/disconnection means is disengaged, where generation of electric power is defined as a positive value. ### Claim 22 (depends on 19) The vehicle driving device of claim 19, wherein the first, second and third rotation elements of the planetary gear type speed changers are sun gears, carriers, and ring gears, respectively. ### Claim 23 A vehicle driving device comprising: a left motor generator connected to a left wheel of a vehicle; a right motor generator connected to a right wheel of the vehicle; and a control device for controlling the right and left motor generators, wherein the control device performs an electric power-prioritized control for controlling the right and left motor generators based on a sum of a left electric power which is generated or consumed by the left motor generator and a right electric power which is generated or consumed by the right motor generator.