# US 2021/0276701 A1 · Autorotative Enhancement System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0276701 A1 - Document ID: US20210276701A1 - Status: Published application - Kind: A1 - Application number: 17/319,629 - Filed: 2021-05-13 - Published: 2021-09-09 - Earliest claimed: 2013-03-15 - Assignees: Textron Innovations Inc. - Applicants: Textron Innovations Inc. - Inventors: Dudley E. Smith; Cory M. Hitte; Bryan Marshall; Carlos Alexander Fenny - Web page: https://patentgrep.com/patent/US20210276701A1 ## CPC - B64C 27/006: {Safety devices} - B64C 27/12: Rotor drives - B64D 27/33: Hybrid electric aircraft - B64D 27/357: using batteries - B64D 27/026: {comprising different types of power plants, e.g. combination of a piston engine and a gas-turbine (Hybrid electric aircraft B64D27/33)} - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - Y10T 29/49117: Conductor or circuit manufacturing - B64C: AEROPLANES; HELICOPTERS - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A system and method for providing a supplemental power includes: an engine, a transmission coupled to the engine, a motor-generator coupled to the transmission, and a battery system coupled to the motor-generator. The motor-generator is configured to draw an energy from the transmission and store the energy in the battery system when the engine is driving the transmission. The battery system is configured to discharge the energy to the motor-generator, and the motor-generator is configured to provide the supplemental power to the transmission. ## Claims ### Claim 1 A system for providing a supplemental power comprising: an engine; a transmission coupled to the engine; a motor-generator coupled to the transmission; a battery system coupled to the motor-generator; wherein the motor-generator is configured to draw an energy from the transmission and store the energy in the battery system when the engine is driving the transmission; and wherein the battery system is configured to discharge the energy to the motor-generator, and the motor-generator is configured to provide the supplemental power to the transmission. ### Claim 2 (depends on 1) The system of claim 1, wherein the supplemental power is provided during a normal operation of the engine. ### Claim 3 (depends on 1) The system of claim 1, wherein the supplemental power is provided in response to a loss of engine power. ### Claim 4 (depends on 1) The system of claim 1, further comprising a controller in communication with the motor-generator. ### Claim 5 (depends on 4) The system of claim 4, wherein the controller automatically triggers the motor-generator to provide the supplemental power. ### Claim 6 (depends on 4) The system of claim 4, wherein the controller is configured to provide an indication of an amount of the energy stored in the battery system. ### Claim 7 (depends on 4) The system of claim 4, wherein the controller is configured to receive one or more commands from a pilot. ### Claim 8 (depends on 4) The system of claim 4, further comprising one or more sensors coupled to the controller. ### Claim 9 (depends on 8) The system of claim 8, wherein the one or more sensors detect one or more of an engine rpm, a rotor rpm, a speed, a descent rate, an altitude, and an amount of the energy stored in the battery system. ### Claim 10 A method of providing a supplemental power comprising: providing an engine, a transmission coupled to the engine, a motor-generator coupled to the transmission, and a battery system coupled to the motor-generator; drawing an energy from the transmission using the motor-generator and storing the energy in the battery system when the engine is driving the transmission; and discharging the energy from the battery system to the motor-generator, and driving the transmission using the motor-generator to provide the supplemental power. ### Claim 11 (depends on 10) The method of claim 10, further comprising providing the supplemental power during a normal operation of the engine. ### Claim 12 (depends on 10) The method of claim 10, further comprising providing the supplemental power in response to a loss of engine power. ### Claim 13 (depends on 10) The method of claim 10, further comprising providing a controller in communication with the motor-generator. ### Claim 14 (depends on 13) The method of claim 13, further comprising automatically triggering the motor-generator using the controller to provide the supplemental power. ### Claim 15 (depends on 13) The method of claim 13, wherein the controller is configured to provide an indication of an amount of the energy stored in the battery system. ### Claim 16 (depends on 13) The method of claim 13, wherein the controller is configured to receive one or more commands from a pilot. ### Claim 17 (depends on 13) The method of claim 13, further comprising providing one or more sensors coupled to the controller. ### Claim 18 (depends on 17) The method of claim 17, further comprising detecting one or more of an engine rpm, a rotor rpm, a speed, a descent rate, an altitude, and an amount of the energy stored in the battery system or the hydraulic accumulator using the one or more sensors. ### Claim 19 A system for providing a supplemental power comprising: an engine; a motor-generator coupled to a rotor system; a battery system coupled to the motor-generator; wherein the motor-generator is configured to draw an energy from the engine and store the energy in the battery system when the engine is operational; and wherein the battery system is configured to discharge the energy to the motor-enerator, and the motor-generator is configured to provide the supplemental power to the rotor system. ### Claim 20 (depends on 1) The system of claim 1, wherein the supplemental power is provided during a normal operation of the engine. ### Claim 21 (depends on 1) The system of claim 1, wherein the supplemental power is provided in response to a loss of engine power. ### Claim 22 (depends on 1) The system of claim 1, further comprising a controller in communication with the motor-generator. ### Claim 23 (depends on 22) The system of claim 22, wherein the controller automatically triggers the motor-generator to provide the supplemental power. ### Claim 24 (depends on 22) The system of claim 22, wherein the controller is configured to provide an indication of an amount of the energy stored in the battery system. ### Claim 25 (depends on 22) The system of claim 22, wherein the controller is configured to receive one or more commands from a pilot. ### Claim 26 (depends on 22) The system of claim 22, further comprising one or more sensors coupled to the controller. ### Claim 27 (depends on 26) The system of claim 26, wherein the one or more sensors detect one or more of an engine rpm, a rotor rpm, a speed, a descent rate, an altitude, and an amount of the energy stored in the battery system.