# US 2017/0282910 A1 · Limp home mode drive method and 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 2017/0282910 A1 - Document ID: US20170282910A1 - Status: Published application - Kind: A1 - Application number: 15/259,090 - Filed: 2016-09-08 - Published: 2017-10-05 - Earliest claimed: 2016-03-30 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Gyeongcheol Kim; Haksung Lee; SangLok Song - Web page: https://patentgrep.com/patent/US20170282910A1 ## CPC - B60W 20/50: Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode - 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 10/10: including control of change-speed gearings - B60W 10/30: including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps - B60W 30/1843: {Overheating of driveline components (B60W30/186 takes precedence)} - B60W 50/14: Means for informing the driver, warning the driver or prompting a driver intervention - B60W 2510/107: Temperature - B60W 2710/083: Torque - B60W 2710/1005: Transmission ratio engaged - B60W 2720/10: Longitudinal speed - B60Y 2200/92: Hybrid vehicles - B60Y 2300/91: Battery charging - B60Y 2306/13: Failsafe arrangements - 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 limp home mode drive method and system for a hybrid vehicle are provided. The method includes prohibiting an operation of an overdrive brake that is included in a transmission for the hybrid vehicle and is driven by an electric oil pump when the hybrid vehicle is being driven and the electric oil pump is not operated. A speed of the hybrid vehicle is then limited based on a heat value of a rotation driver included in the transmission and a torque of a drive motor driving the transmission is limited based on a temperature of the drive motor. A mechanical oil pump included in the hybrid vehicle is operated to enable limp home driving of the hybrid vehicle. ## Claims ### Claim 1 A limp home mode drive method for a hybrid vehicle, comprising: prohibiting, by a controller, an operation of an overdrive brake that is included in a transmission for the hybrid vehicle and is driven by an electric oil pump when the hybrid vehicle is being driven and the electric oil pump is not operated; limiting, by the controller, a speed of the hybrid vehicle based on a heat value of a rotation driver included in the transmission; limiting, by the controller, a torque of a drive motor driving the transmission based on a temperature of the drive motor; and driving, by the controller, a mechanical oil pump included in the hybrid vehicle to enable limp home driving of the hybrid vehicle. ### Claim 2 (depends on 1) The limp home mode drive method of claim 1, further comprising: determining, by the controller, whether a torque required by a driver is greater than or equal to a torque of the drive motor, wherein in response to determining that the torque required by the driver is greater than or equal to the torque of the drive motor, the method includes driving the mechanical oil pump that operates the transmission driven by an engine and the drive motor to perform limp home driving of the hybrid vehicle after the engine that drives the transmission is turned on. ### Claim 3 (depends on 1) The limp home mode drive method of claim 1, wherein the rotation driver includes a gear. ### Claim 4 (depends on 1) The limp home mode drive method of claim 1, further comprising: determining, by the controller, whether the hybrid vehicle is being driven; and turning off, by the controller, the engine that drives the transmission in response to determining that the hybrid vehicle is not being driven. ### Claim 5 (depends on 4) The limp home mode drive method of claim 4, further comprising: determining, by the controller, whether charge of a battery mounted within the hybrid vehicle is required after the engine is turned off; and turning on, by the controller, a warning light in response to determining that the charge of the battery is required. ### Claim 6 (depends on 1) The limp home mode drive method of claim 1, wherein when the heat value of the rotation driver is greater than a predetermined heat value, a speed of the hybrid vehicle is low. ### Claim 7 (depends on 1) The limp home mode drive method of claim 1, wherein when the temperature of the drive motor is greater than a predetermined temperature, the torque of the drive motor is low. ### Claim 8 A limp home mode drive system for a hybrid vehicle, comprising: a memory configured to store program instructions; and a processor configured to execute the program instructions, the program instructions when executed configured to: prohibit an operation of an overdrive brake that is included in a transmission for the hybrid vehicle and is driven by an electric oil pump when the hybrid vehicle is being driven and the electric oil pump is not operated; limit a speed of the hybrid vehicle based on a heat value of a rotation driver included in the transmission; limit a torque of a drive motor driving the transmission based on a temperature of the drive motor; and drive a mechanical oil pump included in the hybrid vehicle to enable limp home driving of the hybrid vehicle. ### Claim 9 (depends on 8) The limp home mode drive system of claim 8, wherein the program instructions when executed are further configured to: determine whether a torque required by a driver is greater than or equal to a torque of the drive motor, drive the mechanical oil pump that operates the transmission driven by an engine and the drive motor to perform limp home driving of the hybrid vehicle after the engine that drives the transmission is turned on in response to determining that the torque required by the driver is greater than or equal to the torque of the drive motor. ### Claim 10 (depends on 8) The limp home mode drive system of claim 8, wherein the rotation driver includes a gear. ### Claim 11 (depends on 8) The limp home mode drive system of claim 8, wherein the program instructions when executed are further configured to: determine whether the hybrid vehicle is being driven, turn off the engine that drives the transmission in response to determining that the hybrid vehicle is not being driven. ### Claim 12 (depends on 11) The limp home mode drive system of claim 11, wherein the program instructions when executed are further configured to: determine whether charge of a battery mounted within the hybrid vehicle is required after the engine is turned off; and turn on a warning light in response to determining that the charge of the battery is required. ### Claim 13 (depends on 8) The limp home mode drive system of claim 8, wherein when the heat value of the rotation driver is greater than a predetermined heat value, a speed of the hybrid vehicle is low. ### Claim 14 (depends on 8) The limp home mode drive system of claim 8, wherein when the temperature of the drive motor is greater than a predetermined temperature, the torque of the drive motor is low.