# US 2016/0355168 A1 · Vehicle control device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0355168 A1 - Document ID: US20160355168A1 - Status: Published application - Kind: A1 - Application number: 15/114,798 - Filed: 2014-12-25 - Published: 2016-12-08 - Earliest claimed: 2014-01-31 - Assignees: Advics Co., Ltd.; Toyota Jidosha Kabushiki Kaisha - Applicants: Advics Co., Ltd.; Toyota Jidosha Kabushiki Kaisha - Inventors: Masaki NINOYU; Takahiro OKANO; Yusuke KAMIYA; Daisuke NAKATA; Masaaki KOMAZAWA - Web page: https://patentgrep.com/patent/US20160355168A1 ## CPC - B60T 13/662: {characterised by specified functions of the control system components} - B60T 7/042: {by electrical means, e.g. using travel or force sensors} - B60T 8/4077: {Systems in which the booster is used as an auxiliary pressure source} - B60T 13/146: {Part of the system directly actuated by booster pressure} - B60T 13/147: {In combination with distributor valve} - B60T 13/686: {in hydraulic systems or parts thereof} - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES ## Abstract A vehicle control device which is applicable to a vehicle brake device, controls the pressure increasing control valve and the pressure-decreasing control valve so that an actual servo pressure detected by the servo pressure sensor becomes a target servo pressure; and controls so as to increase the target servo pressure by a predetermined amount, while the brake actuator is executing the braking control which accompanies a brake fluid pumping back control wherein the brake fluid supplied to the wheel cylinder is pumped back to the master cylinder by the built-in pump. ## Claims ### Claim 1 A vehicle control device applicable to a vehicle brake device which includes; a master cylinder wherein a master piston is driven to move by a servo pressure in a servo chamber and by the movement of the master piston, a master pressure in a master chamber is changed; a servo pressure generating device formed by a high pressure source, a pressure increasing control valve disposed between the high pressure source and the servo chamber for controlling a flow of a brake fluid from the high pressure source to the servo chamber and a pressure decreasing control valve disposed between a low pressure source and the servo chamber for controlling the flow of the brake fluid from the servo chamber to the low pressure source for generating the servo pressure in the servo chamber in response to an operation of a brake operating member by a driver of a vehicle; a servo pressure sensor configure to detect the servo pressure; a wheel cylinder configure to apply a braking force to a vehicle wheel in response to the master pressure from the master cylinder; and a brake actuator disposed between the master cylinder and the wheel cylinder and structured at least so that the brake fluid supplied to the wheel cylinder is pumped back to the master cylinder by a built-in pump, the brake actuator being used for a braking control for controlling a braking force generated by the wheel cylinder, wherein, the vehicle control device is configured to control the pressure increasing control valve and the pressure decreasing control valve so that an actual servo pressure detected by the servo pressure sensor becomes a target servo pressure; and is configured to control so as to increase the target servo pressure by a predetermined amount, while the brake actuator is executing the braking control which accompanies a brake fluid pumping back control wherein the brake fluid supplied to the wheel cylinder is pumped back to the master cylinder by the built-in pump. ### Claim 2 (depends on 1) The vehicle control device according to claim 1, wherein, the predetermined amount is set based on a variation value of the servo pressure derived from a variation of the master pressure generated upon an execution of the braking control which accompanies the brake fluid pumping back control. ### Claim 3 (depends on 1) The vehicle control device according to claim 1, wherein, after the execution of the braking control which accompanies the brake fluid pumping back control has been finished, the target servo pressure increased during the execution of the braking control which accompanies the brake fluid pumping back control is decreased based on a ratio of the predetermined amount increased during the braking control which accompanies the brake fluid pumping back control relative to the target servo pressure at an end of the execution of the braking control which accompanies the brake fluid pumping back control. ### Claim 4 (depends on 1) The vehicle control device according to claim 1, wherein, after the execution of the braking control which accompanies the brake fluid pumping back control has been finished, the target servo pressure increased during the execution of the braking control which accompanies the brake fluid pumping back control is decreased in response to a decrease of an operating amount of the brake operating member. ### Claim 5 (depends on 1) The vehicle control device according to claim 1, wherein, an increase of the target servo pressure by the predetermined amount is prohibited until a predetermined time period passes from the end of the execution of the braking control which accompanies the brake fluid pumping back control. ### Claim 6 (depends on 1) The vehicle control device according to claim 1, wherein, a total increase amount of the target servo pressure is limited to an increase amount upper limit value when the increase of the target servo pressure is executed.