초록 ▼

A system including: a liquid-pressure source device that can supply working fluid to a brake device; and an ABS valve device. The system executes a first control in which a supply pressure of the working fluid becomes a target supply pressure and a second control for making the supply pressure fall

A system including: a liquid-pressure source device that can supply working fluid to a brake device; and an ABS valve device. The system executes a first control in which a supply pressure of the working fluid becomes a target supply pressure and a second control for making the supply pressure fall within the target range. In this system, when the valve device is not being operated, the first control is executed. When the valve device is being operated, the second control is normally operated, and when the supply pressure is higher than a threshold value, the first control is executed. Where completion of the operation of the valve device is estimated, the system performs at least one of reducing the threshold value, reducing an upper limit value of the target range, increasing an electric power supplied to a pressure-reduce linear valve during the first control when the valve device is being operated, and reducing the target supply pressure.

대표청구항 ▼

1. A hydraulic brake system for a vehicle, comprising: a braking operation member operable by a driver;a brake device provided on a wheel and configured to generate a braking force according to a pressure supplied to the brake device;a liquid-pressure source device including: an electromagnetic pres

1. A hydraulic brake system for a vehicle, comprising: a braking operation member operable by a driver;a brake device provided on a wheel and configured to generate a braking force according to a pressure supplied to the brake device;a liquid-pressure source device including: an electromagnetic pressure-increase linear valve configured to increase a pressure of working fluid in accordance with electric power supplied to the pressure-increase linear valve, andan electromagnetic pressure-reduce linear valve configured to reduce the pressure of the working fluid in accordance with electric power supplied to the pressure-reduce linear valve, the liquid-pressure source device being configured to supply the working fluid, the pressure of which has been regulated by the pressure-increase linear valve and the pressure-reduce linear valve;an ABS valve device disposed between the liquid-pressure source device and the brake device; anda controller configured to control the electric power supplied to the pressure-increase linear valve to control an operation of the pressure-increase linear valve and configured to control the electric power supplied to the pressure-reduce linear valve to control an operation of the pressure-reduce linear valve,wherein the controller includes: a target-supply-pressure determining section configured to based on an operation of the braking operation member, determine a target supply pressure as a target of a supply pressure that is a hydraulic pressure of the working fluid supplied by the liquid-pressure source device;a supply-pressure-control executing section configured to selectively perform (a) a first control for making the supply pressure equal to the target supply pressure determined by the target-supply-pressure determining section, by supplying electric power according to a difference between the supply pressure and the target supply pressure to the pressure-reduce linear valve where the supply pressure is higher than the target supply pressure and by supplying electric power according to the difference between the supply pressure and the target supply pressure to the pressure-increase linear valve, where the supply pressure is lower than the target supply pressure, and(b) a second control for making the supply pressure fall within a target range having an upper limit value that is determined to be a value obtained by adding an upper-limit determining additional value to the target supply pressure and having a lower limit that is determined to be a value obtained by reducing a lower-limit determining reduction value from the target supply pressure, by continuing to supply electric power for opening the pressure-reduce linear valve to the pressure-reduce linear valve where the supply pressure is equal to or higher than the upper limit value, and by continuing to supply electric power for opening the pressure-increase linear valve to the pressure-increase linear valve where the supply pressure is equal to or lower than the lower limit; anda control selecting section configured to (i) where the ABS valve device is not being operated, select the first control as the control to be performed by the supply-pressure-control executing section, and(ii) where the ABS valve device is being operated, select the second control as the control to be performed by the supply-pressure-control executing section where the supply pressure is equal to or higher than the target supply pressure and is equal to or lower than the pressure obtained by adding a pressure-reducing threshold-value determination additional value greater than the upper-limit determining additional value to the target supply pressure, and select the first control as the control to be performed by the supply-pressure-control executing section where the supply pressure is higher than the pressure obtained by adding the pressure-reducing threshold-value determination additional value to the target supply pressure,wherein the controller further includes an ABS-valve-device operation-completion dealing section configured to perform a dealing control for dealing with a situation in which the completion of the operation of the ABS valve device is estimated, andwherein the ABS-valve-device operation-completion dealing section is configured to perform, as the dealing control, at least one of: (A) reducing the pressure-reducing threshold-value determination additional value;(B) reducing the upper-limit determining additional value;(C) increasing the electric power being supplied to the pressure-reduce linear valve where the first control is being performed at a point in time when the completion of the operation of the ABS valve device has been estimated; and(D) reducing the target supply pressure determined by the target-supply-pressure determining section. 2. The hydraulic brake system according to claim 1, wherein the ABS-valve-device operation-completion dealing section is configured to: (A) where the pressure-reducing threshold-value determination additional value is reduced as the dealing control, use one of a running velocity of the vehicle equipped with the hydraulic brake system and the target supply pressure as a parameter, and the lower the parameter, the smaller the pressure-reducing threshold-value determination additional value is made;(B) where the upper-limit determining additional value is reduced as the dealing control, use one of the running velocity and the target supply pressure as the parameter, and the lower the parameter, the smaller the upper-limit determining additional value is made;(C) where the electric power being supplied to the pressure-reduce linear valve is increased where the first control is being performed at the point in time when the completion of the operation of the ABS valve device has been estimated as the dealing control, use one o the running velocity and the target supply pressure as the parameter, and the lower the parameter, the greater amount the electric power being supplied to the pressure-reduce linear valve is increased by; and(D) where the target supply pressure determined by the target-supply-pressure determining section is reduced as the dealing control, use one of the running velocity and the target supply pressure as the parameter, and the lower the parameter, the greater amount the target supply pressure is reduced by. 3. The hydraulic brake system according to claim 1, wherein the ABS-valve-device operation-completion dealing section includes an ABS-valve-device operation-completion estimating section configured to estimate the completion of the operation of the ABS valve device, the ABS-valve-device operation-completion dealing section being configured to perform the dealing control on the basis of the estimation of the ABS-valve-device operation-completion estimating section, andwherein the ABS-valve-device operation-completion estimating section is configured to estimate the completion of the operation of the ABS valve device when the supply pressure has been stabilized. 4. The hydraulic brake system according to claim 1, wherein the ABS-valve-device operation-completion dealing section includes an ABS-valve-device operation-completion estimating section configured to estimate the completion of the operation of the ABS valve device, the ABS-valve-device operation-completion dealing section being configured to perform the dealing control on the basis of the estimation of the ABS-valve-device operation-completion estimating section, andwherein the ABS-valve-device operation-completion estimating section is configured to estimate the completion of the operation of the ABS valve device when the supply pressure has increased even though the target supply pressure has not increased. 5. The hydraulic brake system according to claim 1, wherein the ABS-valve-device operation-completion dealing section includes an ABS-valve-device operation-completion estimating section configured to estimate the completion of the operation of the ABS valve device, the ABS-valve-device operation-completion dealing section being configured to perform the dealing control on the basis of the estimation of the ABS-valve-device operation-completion estimating section, andwherein the ABS-valve-device operation-completion estimating section is configured to estimate the completion of the operation of the ABS valve device when the target supply pressure has lowered. 6. The hydraulic brake system according to claim 1, wherein the ABS-valve-device operation-completion dealing section includes an ABS-valve-device operation-completion estimating section configured to estimate the completion of the operation of the ABS valve device, the ABS-valve-device operation-completion dealing section being configured to perform the dealing control on the basis of the estimation of the ABS-valve-device operation-completion estimating section, andwherein the ABS-valve-device operation-completion estimating section is configured to estimate the completion of the operation of the ABS valve device when the target supply pressure has become equal to or lower than a set pressure. 7. The hydraulic brake system according to claim 1, wherein the ABS-valve-device operation-completion dealing section includes an ABS-valve-device operation-completion estimating section configured to estimate the completion of the operation of the ABS valve device, the ABS-valve-device operation-completion dealing section being configured to perform the dealing control on the basis of the estimation of the ABS-valve-device operation-completion estimating section, andwherein the ABS-valve-device operation-completion estimating section is configured to estimate the completion of the operation of the ABS valve device when a running velocity of the vehicle equipped with the hydraulic brake system has become equal to or lower than a set velocity. 8. The hydraulic brake system according to claim 1, wherein the ABS-valve-device operation-completion dealing section includes an ABS-valve-device operation-completion estimating section configured to estimate the completion of the operation of the ABS valve device, the ABS-valve-device operation-completion dealing section being configured to perform the dealing control on the basis of the estimation of the ABS-valve-device operation-completion estimating section, andwherein the ABS-valve-device operation-completion estimating section is configured to estimate the completion of the operation of the ABS valve device when the operation of the ABS valve device has been continued for equal to or longer than a set time. 9. The hydraulic brake system according to claim 1, wherein the ABS-valve-device operation-completion dealing section includes an ABS-valve-device operation-completion estimating section configured to estimate the completion of the operation of the ABS valve device, the ABS-valve-device operation-completion dealing section being configured to perform the dealing control on the basis of the estimation of the ABS-valve-device operation-completion estimating section, andwherein the ABS-valve-device operation-completion estimating section is configured to estimate the completion of the operation of the ABS valve device where a difference between a judgment pressure as one of the supply pressure and the target supply pressure and a brake pressure that is a pressure of the working fluid being supplied to the brake device has become equal to or smaller than a set difference. 10. The hydraulic brake system according to claim 9, further comprising four brake devices each as the brake device and respectively corresponding to four wheels, wherein the ABS-valve-device operation-completion estimating section is configured to determine a single brake pressure, on the basis of the brake pressure of each of at least one of the four brake devices, for judging a difference between the judgment pressure and the single brake pressure, and is configured to estimate the completion of the operation of the ABS valve device when a difference between the determined single brake pressure and the judgment pressure has become equal to or smaller than the set difference. 11. The hydraulic brake system according to claim 9, further comprising four brake devices each as the brake device and respectively corresponding to four wheels, wherein the ABS-valve-device operation-completion estimating section is configured to judge a difference between the judgment pressure and the brake pressure of each of the four brake devices, and is configured to estimate the completion of the operation of the ABS valve device when the difference between the brake pressure of even one of the four brake devices and the judgment pressure has become equal to or smaller than the set difference. 12. The hydraulic brake system according to claim 11, wherein the ABS-valve-device operation-completion dealing section is configured to perform, as the dealing control, at least one of: (A) reducing the pressure-reducing threshold-value determination additional value;(B) reducing the upper-limit determining additional value;(C) increasing the electric power being supplied to the pressure-reduce linear valve where the first control is being performed at a point in time when the completion of the operation of the ABS valve device has been estimated; and(D) reducing the target supply pressure determined by the target-supply-pressure determining section, andwherein the ABS-valve-device operation-completion dealing section is configured to: (A) where the pressure-reducing threshold-value determination additional value is reduced as the dealing control, perform a control in which the larger the number of brake devices in each of which the difference between the brake pressure and the judgment pressure is equal to or smaller than the set difference among the four brake devices, the smaller the pressure-reducing threshold-value determination additional value is made;(B) where the upper-limit determining additional value is reduced as the dealing control, perform the control in which the larger the number of brake devices in each of which the difference between the brake pressure and the judgment pressure is equal to or smaller than the set difference among the four brake devices, the smaller the upper-limit determining additional value is made;(C) where the electric power being supplied to the pressure-reduce linear valve is increased where the first control is being performed at the point in time when the completion of the operation of the ABS valve device has been estimated as the dealing control, perform the control in which the larger the number of brake devices in each of which the difference between the brake pressure and the judgment pressure is equal to or smaller than the set difference among the four brake devices, the larger amount the electric power being supplied to the pressure-reduce linear valve is increased by; and(D) where the target supply pressure determined by the target-supply-pressure determining section is reduced as the dealing control, perform the control in which the larger the number of brake devices in each of which the difference between the brake pressure and the judgment pressure is equal to or smaller than the set difference among the four brake devices, the larger amount the target supply pressure is reduced by. 13. The hydraulic brake system according to claim 9, wherein the ABS-valve-device operation-completion estimating section includes a brake-pressure estimating section configured to estimate the brake pressure on the basis of an operational condition of the ABS valve device after a start of the operation of the ABS valve device, the ABS-valve-device operation-completion estimating section being configured to estimate the completion of the operation of the ABS valve device on the basis of the brake pressure estimated by the brake-pressure estimating section.