# US 2014/0156129 A1 · Control device for vehicle drive device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0156129 A1 - Document ID: US20140156129A1 - Status: Published application - Kind: A1 - Application number: 14/129,442 - Filed: 2011-06-29 - Published: 2014-06-05 - Earliest claimed: 2011-06-29 - Assignees: Toyota Jidosha Kabushiki Kaisha - Inventors: Atsushi Tabata; Tatsuya Imamura - Web page: https://patentgrep.com/patent/US20140156129A1 ## CPC - B60W 20/10: Controlling the power contribution of each of the prime movers to meet required power demand - B60K 6/48: Parallel type - B60K 6/547: the transmission being a stepped gearing - B60W 10/026: {of lock-up clutches} - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/10: including control of change-speed gearings - B60W 10/115: with planetary gears - B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} - B60W 30/1882: {characterised by the working point of the engine, e.g. by using engine output chart} - B60W 2710/0644: Engine speed - B60W 2710/0666: Engine torque - B60W 2710/083: Torque - B60Y 2200/92: Hybrid vehicles - Y02T 10/62: Hybrid vehicles - Y10S 903/93: Conjoint control of different elements - 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 - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A control device of a vehicle drive device includes a hydraulic power transmission device having an input-side rotating element to which power from an engine is input and an output-side rotating element outputting power to drive wheels, a first electric motor coupled to the input-side rotating element, and a second electric motor coupled to the drive wheels, the vehicle drive device having an electric path through which power is electrically transmitted between the first electric motor and the second electric motor and a mechanical path through which power is mechanically transmitted via the hydraulic power transmission device, the control device controlling an operating point of the engine by adjusting a torque of the first electric motor, the control device changing a proportion of power transmitted through the electric path and power transmission through the mechanical path based on a request amount when the operating point of the engine is controlled. ## Claims ### Claim 1 A control device of a vehicle drive device including a hydraulic power transmission device configured to have an input-side rotating element to which power from an engine is input and an output-side rotating element outputting power to drive wheels, a first electric motor configured to be directly or indirectly coupled to the input-side rotating element, and a second electric motor configured to be directly or indirectly coupled to the drive wheels, the vehicle drive device configured to have an electric path through which power is electrically transmitted by giving/receiving electric power between the first electric motor and the second electric motor and a mechanical path through which power is mechanically transmitted via the hydraulic power transmission device, the control device of the vehicle drive device being configured to control an operating point of the engine by adjusting a torque of the first electric motor, the control device of the vehicle drive device being configured to adjust the torque of the first electric motor such that a sum of an engine torque and the torque of the first electric motor is balanced with an input-side load torque generated in the input-side rotating element depending on a speed ratio of the hydraulic power transmission device, the input-side load torque being obtained based on an engine rotation speed indicated by a target engine operating point, and the torque of the first electric motor being determined based on the input-side load torque and the engine torque indicated by the target engine operating point, and to change a proportion of power transmitted by power transmission through the electric path and power transmission through the mechanical path based on a request amount by adjusting the torque of the first electric motor when the operating point of the engine is controlled. ### Claim 2 (depends on 1) The control device of the vehicle drive device of claim 1, wherein the hydraulic power transmission device is a torque converter having a pump impeller that is the input-side rotating element and a turbine impeller that is the output-side rotating element, wherein the request amount is an acceleration request amount, and wherein if the acceleration request amount is larger, the proportion of the power transmitted through the mechanical path is increased as compared to when the acceleration request amount is smaller. ### Claim 3 (depends on 1) The control device of the vehicle drive device of claim 1, wherein the request amount is a presence of a warm-up request to the vehicle drive device, and wherein if the warm-up request is present, the proportion of the power transmitted through the mechanical path is increased as compared to when the warm-up request is absent. ### Claim 4 (canceled) ### Claim 5 (depends on 1) The control device of the vehicle drive device of claim 1, wherein the operating point of the engine is controlled by adjusting the torque of the first electric motor such that the operating point of the engine is located along a predetermined operation curve of the engine and that a target value of engine output is achieved. ### Claim 6 (depends on 1) The control device of the vehicle drive device of claim 1, wherein the operating point of the engine is shifted to the side of greater total efficiency represented by a product of a power transmission efficiency when power from the engine is transmitted through the electric path and the mechanical path and an engine efficiency at the operating point of the engine.