# US 2022/0032897 A1 · Electric vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0032897 A1 - Document ID: US20220032897A1 - Status: Published application - Kind: A1 - Application number: 17/379,301 - Filed: 2021-07-19 - Published: 2022-02-03 - Earliest claimed: 2020-07-30 - Assignees: Subaru Corporation - Applicants: Subaru Corporation - Inventors: Fumiyuki MORIYA; Atsushi DOKI; Hirofumi YABE; Takumi HOSHI; Masaki KOMURO; Tetsu MATSUZAKI; Jun OOSAWA - Web page: https://patentgrep.com/patent/US20220032897A1 ## CPC - B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} - B60K 6/24: characterised by the combustion engines - B60K 6/26: characterised by the motors or the generators - B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means - B60K 6/48: Parallel type - B60K 6/543: the transmission being a continuously variable transmission - B60W 20/15: Control strategies specially adapted for achieving a particular effect - B60W 30/18009: {related to particular drive situations} - B60W 30/18036: {Reversing} - B60W 30/18172: {Preventing, or responsive to skidding of wheels} - B60W 30/182: Selecting between different operative modes, e.g. comfort and performance modes - B60W 30/188: Controlling power parameters of the driveline, e.g. determining the required power - B60W 50/00: Details of control systems for road vehicle drive control not related to the control of a particular sub-unit {, e.g. process diagnostic or vehicle driver interfaces} - B60K 2006/4825: {Electric machine connected or connectable to gearbox input shaft} - B60W 2050/0026: {Lookup tables or parameter maps} - B60W 2050/0042: {Transfer function lag; delays} - B60W 2520/06: Direction of travel - B60W 2540/16: Ratio selector position - B60W 2540/215: Selection or confirmation of options - B60W 2552/35: Road bumpiness, e.g. potholes - B60W 2710/085: Torque change rate - B60W 2720/26: Wheel slip - B60Y 2200/92: Hybrid vehicles - B60Y 2300/18008: related to particular drive situations - B60Y 2300/18175: Preventing, or responsive to skidding of wheels - B60Y 2300/182: Selecting between different operative modes, e.g. comfort and performance modes - Y02T 10/62: Hybrid vehicles - Y02T 10/72: Electric energy management in electromobility - 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 ## Abstract An electric vehicle includes a vehicle controller. The vehicle controller is capable of switching a traveling mode of the electric vehicle between a first traveling mode and a second traveling mode that applies driving-force maps for enhancing a rough-road capability from a rough-road capability in the first traveling mode. The vehicle controller is capable of switching the traveling mode to the second traveling mode in forward traveling and in backward traveling and is configured to apply, to the backward traveling in the second traveling mode, a first driving-force map of the driving-force maps, the first driving-force map having gentler characteristics than a second driving-force map of the driving-force map applied to the forward traveling in the second traveling mode. ## Claims ### Claim 1 An electric vehicle comprising: a vehicle controller capable of switching a traveling mode of the electric vehicle between a first traveling mode and a second traveling mode that applies driving-force maps for enhancing a rough-road capability from a rough-road capability in the first traveling mode, wherein the vehicle controller is capable of switching the traveling mode to the second traveling mode in forward traveling and in backward traveling and is configured to apply, to the backward traveling in the second traveling mode, a first driving-force map of the driving-force maps, the first driving-force map having gentler characteristics than a second driving-force map of the driving-force maps, the second driving-force map being applied to the forward traveling in the second traveling mode. ### Claim 2 (depends on 1) The electric vehicle according to claim 1, further comprising: an engine configured to drive a driving wheel; a drive motor configured to drive the driving wheel; and a continuously variable transmission configured to transfer power generated by the drive motor to the driving wheel, wherein the second traveling mode allows outputting of power generated by the engine alone to the drive wheel or both the outputting of the power generated by the engine and outputting of the power generated by the drive motor to the drive wheel, and wherein the vehicle controller is configured to apply a delay to the outputting of the power generated by the drive motor in response to switching between the forward traveling and the backward traveling in the second traveling mode. ### Claim 3 (depends on 2) The electric vehicle according to claim 2, wherein the delay applied in response to switching of forward traveling to backward traveling in the second traveling mode is shorter than the delay applied in response to switching of backward traveling to forward traveling in the second traveling mode. ### Claim 4 (depends on 2) The electric vehicle according to claim 2, wherein in response to co-occurrence of starting of the engine and switching between forward traveling and backward traveling in the second traveling mode, the vehicle controller increases the delay. ### Claim 5 (depends on 3) The electric vehicle according to claim 3, wherein in response to co-occurrence of starting of the engine and switching between forward traveling and backward traveling in the second traveling mode, the vehicle controller increases the delay. ### Claim 6 (depends on 1) The electric vehicle according to claim 1, wherein the second traveling mode includes a sub-mode A in which wheelspin of the driving wheel is permitted, and a sub-mode B in which wheelspin of the driving wheel is suppressed, and wherein the vehicle controller is configured to reduce a power change that occurs in response to switching between the sub-mode A and the sub-mode B more gradually in the backward traveling than in the forward traveling. ### Claim 7 (depends on 2) The electric vehicle according to claim 2, wherein the second traveling mode includes a sub-mode A in which wheelspin of the driving wheel is permitted, and a sub-mode B in which wheelspin of the driving wheel is suppressed, and wherein the vehicle controller is configured to reduce a power change that occurs in response to switching between the sub-mode A and the sub-mode B more gradually in the backward traveling than in the forward traveling. ### Claim 8 (depends on 3) The electric vehicle according to claim 3, wherein the second traveling mode includes a sub-mode A in which wheelspin of the driving wheel is permitted, and a sub-mode B in which wheelspin of the driving wheel is suppressed, and wherein the vehicle controller is configured to reduce a power change that occurs in response to switching between the sub-mode A and the sub-mode B more gradually in the backward traveling than in the forward traveling. ### Claim 9 (depends on 4) The electric vehicle according to claim 4, wherein the second traveling mode includes a sub-mode A in which wheelspin of the driving wheel is permitted, and a sub-mode B in which wheelspin of the driving wheel is suppressed, and wherein the vehicle controller is configured to reduce a power change that occurs in response to switching between the sub-mode A and the sub-mode B more gradually in the backward traveling than in the forward traveling. ### Claim 10 (depends on 5) The electric vehicle according to claim 5, wherein the second traveling mode includes a sub-mode A in which wheelspin of the driving wheel is permitted, and a sub-mode B in which wheelspin of the driving wheel is suppressed, and wherein the vehicle controller is configured to reduce a power change that occurs in response to switching between the sub-mode A and the sub-mode B more gradually in the backward traveling than in the forward traveling. ### Claim 11 An electric vehicle comprising: circuitry capable of switching a traveling mode of the electric vehicle between a first traveling mode and a second traveling mode that applies driving-force maps for enhancing a rough-road capability from a rough-road capability in the first traveling mode is applied, wherein the circuitry is capable of switching the traveling mode to the second traveling mode in forward traveling and in backward traveling and is configured to apply, to the backward traveling in the second traveling mode, a first driving-force map of the driving-force maps, the first driving-force map having gentler characteristics than a second driving-force map of the driving-force maps, the second driving-force map being applied to the forward traveling in the second traveling mode.