# US 11,077,841 B2 · Control system for hybrid vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,841 B2 - Document ID: US11077841B2 - Status: Granted - Kind: B2 - Application number: 15/699,624 - Filed: 2017-09-08 - Published: 2018-03-15 - Granted: 2021-08-03 - Earliest claimed: 2016-09-12 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Kenji Itagaki - Web page: https://patentgrep.com/patent/US11077841B2 ## CPC - B60W 20/10: Controlling the power contribution of each of the prime movers to meet required power demand - B60K 6/445: Differential gearing distribution type - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 20/19: for achieving enhanced acceleration - B60W 50/06: Improving the dynamic response of the control system, e.g. improving the speed of regulation or avoiding hunting or overshoot - B60W 2510/0638: Engine speed - B60W 2510/0657: Engine torque - B60W 2510/0695: Inertia - B60W 2510/083: Torque - B60W 2540/10: Accelerator pedal position - B60W 2710/0644: Engine speed - B60W 2710/0666: Engine torque - B60W 2710/083: Torque - Y02T 10/62: Hybrid vehicles - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The control system for a hybrid vehicle configured to ensure acceleration of the vehicle is provided. When accelerating the vehicle quickly, a torque command to an engine is calculated by adding a torque corresponding to an inertia torque of the engine that is required to increase an engine speed to the required engine torque. In this situation, a controller controls the engine in such a manner as to generate torque based on the calculated torque command, and controls a motor in such a manner as to generate reaction torque against a required engine torque. ## Claims ### Claim 1 A control system for a hybrid vehicle, comprising: an engine; an output member transmitting power to drive wheels; a motor having a generating function; and a power split device that distributes output torque of the engine to the output member and the motor; wherein the power split device includes an input element connected to the engine, a reaction element connected the motor, and an output element connected to the output member, wherein the motor generates a reaction torque against the output torque of the engine generated based on a required engine torque when accelerating the vehicle so as to deliver the output torque of the engine to the drive wheels, and wherein the control system comprises a controller, the controller including microcomputer for executing programs stored in memory thereof, the controller is configured to: calculate the output torque of the engine by adding an inertia torque of the engine that is required to increase an engine speed to the required engine torque when accelerating the vehicle, and wherein the output torque of the engine is further calculated by adding the inertia torque of the engine to the required engine torque, when the inertia torque of the engine is greater than a predetermined threshold value, and when accelerating the vehicle; output the calculated output torque of the engine by the engine; and output the reaction torque against the required engine torque. ### Claim 2 (depends on 1) The control system for the hybrid vehicle as claimed in claim 1, wherein the controller is further configured to calculate the torque of the motor corresponding to the inertia torque of the engine based on a difference between an actual engine speed and a target engine speed in a current routine, and based on a difference between the target engine speed in the current routine and the target engine speed after a lapse of predetermined period of time. ### Claim 3 (depends on 1) The control system for the hybrid vehicle as claimed in claim 1, wherein the controller is further configured to: calculate the torque command to the engine based only on the required engine torque when the motor generates torque corresponding to the inertia torque of the engine to increase the engine speed, and the torque of the motor is smaller than the predetermined threshold value; control the engine in such a manner as to generate torque based on the calculated torque command; and control the motor in such a manner as to generate the reaction torque against the required engine torque and the torque to increase the engine speed. ### Claim 4 (depends on 1) The control system for the hybrid vehicle as claimed in claim 1, wherein a maximum output torque of the engine that is applied to the input element of the power split device to increase the engine speed is greater than a maximum output torque of the motor that is applied to the input element of the power split device to increase the engine speed. ### Claim 5 (depends on 4) The control system for the hybrid vehicle as claimed in claim 4, further comprising: a torque booster that boosts the output torque of the engine to increase the engine speed. ### Claim 6 (depends on 1) The control system for the hybrid vehicle as claimed in claim 1, further comprising: another motor that is disposed between the output member and the drive wheels, wherein said another motor is operated by supplying electric power generated by the motor to generate torque applied to the drive wheels.