# US 10,697,540 B2 · Vehicle control device and vehicle control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,697,540 B2 - Document ID: US10697540B2 - Status: Granted - Kind: B2 - Application number: 15/757,850 - Filed: 2016-09-06 - Published: 2018-12-13 - Granted: 2020-06-30 - Earliest claimed: 2015-09-10 - Assignees: JATCO Ltd; Nissan Motor Co., Ltd. - Applicants: JATCO Ltd; Nissan Motor Co., Ltd. - Inventors: Yoshinobu Kawamoto; Seiichirou Takahashi - Web page: https://patentgrep.com/patent/US10697540B2 ## CPC - F16H 61/66259: {using electrical or electronical sensing or control means} - B60W 10/026: {of lock-up clutches} - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/107: with endless flexible members - B60W 20/30: Control strategies involving selection of transmission gear ratio {(control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H)} - B60W 30/18054: {at stand still, e.g. engine in idling state (hill holding B60W30/18118)} - F16H 61/0213: {characterised by the method for generating shift signals} - B60W 2540/10: Accelerator pedal position - B60W 2710/083: Torque - F16H 2061/0485: {during range shift from neutral (N) to reverse (R)} - F16H 2061/0488: {during range shift from neutral (N) to drive (D)} - F16H 2061/6614: {Control of ratio during dual or multiple pass shifting for enlarged ratio coverage} - F16H: GEARING - 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 ## Abstract A vehicle control device for controlling a vehicle including a variator provided in a power transmission path between a driving source and a driving wheel of a vehicle and a friction engaging element provided between the variator and the driving wheel, engaged when a running range is selected, while disengaged when a non-running range is selected and shutting off transmission of power through the power transmission path is provided. In this embodiment, an operating state of the vehicle is detected, a target speed ratio of the variator according to the operating state of the vehicle is set, if an actual speed ratio of the variator is smaller than the target speed ratio, shifting control of lowering a supply hydraulic pressure to a primary pulley of the variator and increasing the speed ratio of the variator is executed, and when the selection is switched from the non-running range to the running range during execution of the shifting control, lowering of the supply hydraulic pressure to the primary pulley after the switching is regulated. ## Claims ### Claim 1 A vehicle control device adapted to control a vehicle including: a variator provided in a power transmission path between a driving source and a driving wheel of a vehicle; a friction engaging element provided between the variator and the driving wheel, engaged when a running range is selected, while disengaged when a non-running range is selected and shutting off transmission of power through the power transmission path, and a controller configured to detect an operating state of the vehicle; set a target speed ratio of the variator according to the operating state of the vehicle; when an actual speed ratio of the variator is smaller than the target speed ratio, execute shifting control of lowering a supply hydraulic pressure to a primary pulley of the variator and increasing the speed ratio of the variator is executed; and when the shifting range is switched from the non-running range to the running range during execution of the shifting control, regulate lowering of the supply hydraulic pressure to the primary pulley after the switching. ### Claim 2 (depends on 1) The vehicle control device according to claim 1, wherein the controller is configured to regulate lowering of the supply hydraulic pressure during stop of the vehicle. ### Claim 3 (depends on 1) The vehicle control device according to claim 1, wherein the target speed ratio set during the stop is the lowest speed ratio set in advance for the variator. ### Claim 4 (depends on 1) The vehicle control device according to claim 1, wherein the controller is configured to increase a supply hydraulic pressure to the primary pulley at a point of time when a torque capacity is generated in the friction engaging element by switching to the running range more than the supply hydraulic pressure set for the primary pulley in the shifting control when there is no switching to the running range. ### Claim 5 (depends on 4) The vehicle control device according to claim 4, wherein a supply hydraulic pressure to the primary pulley at a point of time when the torque capacity is generated is set to a predetermined pressure at which the belt slip does not occur in the variator with respect to the torque input to the variator by engagement of the friction engaging element. ### Claim 6 (depends on 5) The vehicle control device according to claim 5, wherein the controller is configured to increase the supply hydraulic pressure gradually so that the supply hydraulic pressure reaches the predetermined hydraulic pressure by a point of time when the torque capacity is generated in the friction engaging element after switching to the running range at the latest. ### Claim 7 (depends on 5) The vehicle control device according to claim 5, wherein the supply hydraulic pressure is set to the predetermined pressure at the same time as switching to the running range. ### Claim 8 (depends on 1) The vehicle control device according to claim 1, wherein the controller is configured to prohibit lowering of a supply hydraulic pressure to the primary pulley after the switching. ### Claim 9 (depends on 1) The vehicle control device according to claim 1, in which the friction engaging element includes a first friction engaging element engaged when a forward running range is selected and a second friction engaging element engaged when a reverse running range is selected, wherein when a shifting range is switched from the non-running range to the forward running range or to the reverse running range during execution of the shifting control, the controller prohibits lowering of the supply hydraulic pressure after the switching. ### Claim 10 (depends on 1) The vehicle control device according to claim 1, wherein in a shift operation between the same running range via the non-running range, when a shifting range is switched from the non-running range to the running range during execution of the shifting control, the controller regulates lowering of the supply hydraulic pressure after the switching. ### Claim 11 A vehicle control method for a vehicle including: a variator provided in a power transmission path between a driving source and a driving wheel of the vehicle; and a friction engaging element provided between the variator and the driving wheel, engaged when a running range is selected, while disengaged when a non-running range is selected and shutting off transmission of power through the power transmission path, the vehicle control method comprising detecting an operating state of the vehicle; setting a target speed ratio of the variator according to the operating state of the vehicle; when an actual speed ratio of the variator is smaller than the target speed ratio, executing shifting control of lowering a supply hydraulic pressure to a primary pulley of the variator and increasing the speed ratio of the variator; and when the shifting range is switched from the non-running range to the running range during execution of the shifting control, regulating lowering of the supply hydraulic pressure to the primary pulley after the switching.