# US 2019/0170248 A1 · Method of controlling driving of cvt vehicle during cornering > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170248 A1 - Document ID: US20190170248A1 - Status: Published application - Kind: A1 - Application number: 16/001,704 - Filed: 2018-06-06 - Published: 2019-06-06 - Earliest claimed: 2017-12-06 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corp. - Inventors: Chan Hee WON; Sung Hwa Jeong; Woo II Chang; Hyung Hee Lee; Jun Sung Park; Ho Young Kim - Web page: https://patentgrep.com/patent/US20190170248A1 ## CPC - F16H 61/662: with endless flexible members - F16H 61/0213: {characterised by the method for generating shift signals} - F16H 59/42: Input shaft speed - F16H 59/44: dependent on machine speed {, e.g. the vehicle speed} (F16H59/46 takes precedence) - F16H 59/54: dependent on signals from the brakes, e.g. parking brakes - F16H 59/58: dependent on signals from the steering - F16H 59/70: dependent on the ratio established - F16H 2059/704: {Monitoring gear ratio in CVT's} - F16H 2061/022: {Calculation or estimation of optimal gear ratio, e.g. best ratio for economy drive or performance according driver preference, or to optimise exhaust emissions} - F16H 2061/0234: {Adapting the ratios to special vehicle conditions} - F16H 2061/66218: {dependent on control input parameters other than ambient conditions or driver's choice} - F16H: GEARING ## Abstract A method of controlling driving of a CVT vehicle during cornering performed by a controller, may include determining whether it is necessary to perform an auxiliary control process to enhance a re-acceleration response after entering the corner, by determining a travelling state of the vehicle; setting a target gear ratio instead of a gear ratio obtained based on a shift pattern when the determining produces an affirmative result indicating that it is necessary to perform the auxiliary control process; and performing gear shifting of a CVT to follow the target gear ratio set in the setting of the gear ratio. ## Claims ### Claim 1 A method of controlling driving of a continuously variable transmission (CVT) vehicle during cornering, the method being performed by a controller and comprising: determining whether it is necessary to perform an auxiliary control process to enhance a re-acceleration response after the vehicle enters the corner, by determining a travelling state of the vehicle; setting a target gear ratio instead of a gear ratio which is determined according to a shift pattern when the determining produces an result indicating that it is necessary to perform the auxiliary control process; and performing gear shifting such that an gear ratio of a continuously variable transmission (CVT) follows the target gear ratio. ### Claim 2 (depends on 1) The method according to claim 1, wherein the determining produces the result indicating that it is necessary to perform the auxiliary control process when the following conditions are satisfied: a vehicle speed is greater than a first reference vehicle speed; the gear ratio of the CVT is less than a first reference gear ratio; a brake pressure is greater than a reference brake pressure; an absolute value of a steering angle is greater than a first reference steering angle; and a driving pulley revolution per minute (RPM) is less than a first reference RPM. ### Claim 3 (depends on 2) The method according to claim 2, wherein in the determining, the controller is configured to determine that it is necessary to release the auxiliary control process when the vehicle speed is equal to or less than a second reference vehicle speed, when the gear ratio of the CVT is equal to or greater than a second reference gear ratio, when the gear ratio of the CVT is equal to or greater than a control target gear ratio determined to control the CVT to follow the target gear ratio, when a state in which an absolute value of the steering angle is equal to or less than a second reference steering angle continues for a predetermined holding time or longer, or when the driving pulley target revolution per minute (RPM) obtained based on the shift pattern is equal to or greater than a second reference RPM. ### Claim 4 (depends on 3) The method according to claim 3, wherein the second reference vehicle speed is set to be lower than the first reference vehicle speed, the second reference gear ratio is set to be higher than the first reference gear ratio, and the second reference steering angle is set to be less than the first reference steering angle. ### Claim 5 (depends on 1) The method according to claim 1, wherein the setting of the target gear ratio is performed by setting, as the target gear ratio, a value obtained by dividing a driving pulley control target revolution per minute (RPM) obtained from a map having absolute values of a brake pressure and a steering angle as independent variables and a driving pulley control target revolution per minute (RPM) as a dependent variable, by a driven pulley RPM. ### Claim 6 (depends on 1) The method according claim 1, wherein the setting of the target gear ratio is performed by setting, as the target gear ratio, a value obtained by dividing a driving pulley control target revolution per minute (RPM) obtained from a map having a vehicle speed and a driving mode as independent variables and a driving pulley control target revolution per minute (RPM) as a dependent variable, by a driven pulley RPM. ### Claim 7 (depends on 1) The method according to claim 1, wherein the performing of the gear shifting is configured such that the gear shifting is performed at a speed set for a sports mode regardless of a driving mode set currently.