# US 11,077,839 B2 · Control system of vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,839 B2 - Document ID: US11077839B2 - Status: Granted - Kind: B2 - Application number: 16/367,677 - Filed: 2019-03-28 - Published: 2019-10-10 - Granted: 2021-08-03 - Earliest claimed: 2018-04-10 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Mitsutaka Matsumura - Web page: https://patentgrep.com/patent/US11077839B2 ## CPC - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} - B60W 60/0053: {from vehicle to occupant} - G05D 1/00: Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots (drive control systems specially adapted for autonomous road vehicles B60W60/00) - B60W 2050/007: {Switching between manual and automatic parameter input, and vice versa} - B60W 2510/087: Temperature - B60W 2510/107: Temperature - B60W 2710/083: Torque - B60W 2710/088: Temperature - 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 - G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES ## Abstract A control system is installed on a vehicle having an electric motor as a drive power source. The control system includes an electronic control unit configured to switch the vehicle between an automatic driving mode using automatic drive control, and a manual driving mode in which the vehicle is operated by a driver. The electronic control unit is configured to limit the load factor of the electric motor, in the case where the temperature of the electric motor is higher than a first threshold temperature when the vehicle travels in the automatic driving mode, and the case where the temperature of the electric motor is higher than a second threshold temperature when the vehicle travels in the manual driving mode. The second threshold temperature is set to a value higher than the first threshold temperature. ## Claims ### Claim 1 A control system installed on a vehicle having an electric motor as a drive power source, comprising: an electronic control unit configured to: switch the vehicle between an automatic driving mode using automatic drive control, and a manual driving mode in which the vehicle is operated by a driver; and limit a load factor of the electric motor, in a case where a temperature of the electric motor is higher than a first threshold temperature when the vehicle travels in the automatic driving mode, and a case where the temperature of the electric motor is higher than a second threshold temperature when the vehicle travels in the manual driving mode, the second threshold temperature being set to a value that is higher than the first threshold temperature. ### Claim 2 (depends on 1) The control system according to claim 1, wherein the electronic control unit is configured to set the second threshold temperature to a value equal to the first threshold temperature, after a lapse of a predetermined time from a point in time at which the vehicle is switched from the automatic driving mode to the manual driving mode. ### Claim 3 (depends on 1) The control system according to claim 1, wherein the electronic control unit is configured to set the first threshold temperature so as to reduce a threshold temperature difference between the second threshold temperature and the first threshold temperature, when a second automatic driving mode having a higher degree of freedom in traveling than the automatic driving mode is selected. ### Claim 4 A control system installed on a vehicle having an electric motor as a drive power source, the vehicle includes a power transmission system provided on a power transmission path between the electric motor and drive wheels, the control system comprising: an electronic control unit configured to: switch the vehicle between an automatic driving mode using automatic drive control, and a manual driving mode in which the vehicle is operated by a driver; and limit a load factor of the electric motor, in a case where a hydraulic oil temperature is higher than a first threshold temperature when the vehicle travels in the automatic driving mode, and a case where the hydraulic oil temperature is higher than a second threshold temperature when the vehicle travels in the manual driving mode, the second threshold temperature being set to a value that is higher than the first threshold temperature, the hydraulic oil temperature being a temperature of hydraulic oil supplied to hydraulically operated parts and lubrication regions, and the hydraulically operated parts and the lubrication regions being included in the power transmission system. ### Claim 5 (depends on 4) The control system according to claim 4, wherein the electronic control unit is configured to set the second threshold temperature to a value equal to the first threshold temperature, after a lapse of a predetermined time from a point in time at which the vehicle is switched from the automatic driving mode to the manual driving mode. ### Claim 6 (depends on 4) The control system according to claim 4, wherein the electronic control unit is configured to set the first threshold temperature so as to reduce a threshold temperature difference between the second threshold temperature and the first threshold temperature, when a second automatic driving mode having a higher degree of freedom in traveling than the automatic driving mode is selected. ### Claim 7 A control system installed on a vehicle having an electric motor as a drive power source, the vehicle includes an inverter and a power storage device, the electric motor is connected to the power storage device via the inverter, the control system comprising: an electronic control unit configured to: switch the vehicle between an automatic driving mode using automatic drive control, and a manual driving mode in which the vehicle is operated by a driver; and limit a load factor of the electric motor, in a case where a temperature of the inverter is higher than a first threshold temperature when the vehicle travels in the automatic driving mode, and a case where the temperature of the inverter is higher than a second threshold temperature when the vehicle travels in the manual driving mode, the second threshold temperature being set to a value that is higher than the first threshold temperature. ### Claim 8 (depends on 7) The control system according to claim 7, wherein the electronic control unit is configured to set the second threshold temperature to a value equal to the first threshold temperature, after a lapse of a predetermined time from a point in time at which the vehicle is switched from the automatic driving mode to the manual driving mode. ### Claim 9 (depends on 7) The control system according to claim 7, wherein the electronic control unit is configured to set the first threshold temperature so as to reduce a threshold temperature difference between the second threshold temperature and the first threshold temperature, when a second automatic driving mode having a higher degree of freedom in traveling than the automatic driving mode is selected.