A parking brake apparatus is provided for a vehicle having components of a parking brake system. The parking brake apparatus comprises a parking brake controller arranged to (i) obtain a first signal indicative of whether a hill start assist system is installed on the vehicle, and (ii) provide one or more control signals to be applied to components of the parking brake system to apply parking brakes when the first signal is indicative of a hill start assist system installed on the vehicle is present and a second signal indicative of the hill start assist system being activated is received.

A braking control device includes a first control unit configured to execute first control for reducing a target braking force, which is either a front-wheel braking force to be applied to front wheels of a vehicle or a rear-wheel braking force to be applied to rear wheels during increasing of deceleration of the vehicle, in a case that a behavior of the vehicle is unstable as the target braking force is increased; and a second control unit configured to execute second control for reducing a rate of increase in the target braking force and increasing a rate of increase in the front-wheel braking force or the rear-wheel braking force, which is not the target braking force, prior to execution of the first control.

A system for predicting a negative pressure of a brake booster of a vehicle includes: a driving information detector configured to detect driving information according to driving of the vehicle; and a controller configured to calculate a negative pressure of an intake manifold based on a pressure of the intake manifold and an atmospheric pressure that is the driving information and including a booster negative pressure predictor configured to predict the negative pressure of the brake booster by integrating over time a change rate according to a charging rate and a discharging rate of the negative pressure calculated using a previous negative pressure of the brake booster calculated in a previous cycle according to a logic for predicting the negative pressure of the brake booster and the negative pressure of the intake manifold and a brake pedal force of a current cycle.

A vehicle control apparatus executes a wheel speed change control to control speeds of first road wheels and a second road wheel to a lower limit wheel speed or more when braking forces are applied to the first and second road wheels, and at least one of the speeds of the first and second road wheels becomes lower than the lower limit wheel speed. A vehicle speed change control executes a first increase-decrease control which alternately executes a first increase control to increase braking forces applied to the first road wheels together and a first decrease control to decrease the braking forces applied to the first road wheels together and (ii) a second increase-decrease control which increases and decreases the braking force applied to the second road wheel.

To enable achievement of stable braking regardless of influences by aging or the like of a brake device.

There is provided a brake ECU 30 for a vehicle 1 with a brake device 11 that can adjust a break force depending on fed hydraulic pressure, the vehicle 1 including: a master pressure sensor 17 configured to measure hydraulic pressure fed to the brake device 11; and a G sensor 44 and a wheel speed sensor 12 configured to be capable of detecting acceleration of the vehicle 1 and measure acceleration information, the brake ECU 30 being configured to include: a pressure command value computation portion 36 configured to determine a hydraulic pressure fed to the brake device 11 at a time of deceleration of the vehicle 1 on a basis of a preset coefficient and cause the determined hydraulic pressure to be fed to the brake device 11; and a brake torque coefficient computation portion 31 configured to learn a coefficient candidate, which is a candidate to change the coefficient, and change the coefficient to the coefficient candidate on a basis of a relationship between the hydraulic pressure and the acceleration.

A brake controller includes: a necessary braking force calculator to calculate a necessary braking force that is a braking force generated by a mechanical brake apparatus in order to obtain a deceleration indicated by a brake command; an initial speed acquirer to acquires an initial speed; a target pressing force calculator to calculate a target pressing force that is a force for pressing a brake shoe against a wheel in order to obtain the necessary braking force; and a target pressure calculator to calculate a target pressure indicating a pressure of a fluid inside the brake cylinder that is necessary for obtaining the target pressing force and perform feedback control to adjust the target pressure based on a feedback signal acquired from a pressure sensor.

A control device for a power transmission mechanism includes a controller. The power transmission mechanism includes an engagement mechanism and an operation mechanism including a movable member and a guide member. The guide member includes a plurality of guide areas being configured to move relative to the movable member to guide the movable member to an engaging position or to a disengaging position. The controller is configured to switch, when determining that a predetermined condition related to traveling of the vehicle is satisfied, a contact guide area that is in contact with the movable member to guide the movable member to the engaging position or to the disengaging position, from a first guide area to a second guide area that are included in the plurality of guide areas.

A control system for a subject vehicle includes an autonomous braking system, a forward monitoring sensor and a rearward monitoring sensor. The controller monitors a first speed of a first vehicle travelling in front of the subject vehicle and a second speed of a second vehicle travelling to the rear of the subject vehicle. A first gap-closing time is determined based upon the speed of the subject vehicle and the first speed of the first vehicle. A second gap-closing time is determined based upon the speed of the subject vehicle and the second speed of the second vehicle. The controller controls the speed of the subject vehicle based upon the first gap-closing time and the second gap-closing time when one of the first gap-closing time or the second gap-closing time is less than a first threshold time.

A system for and a method of controlling driving of a continuously-operable electronic vacuum pump includes determining conditions for allowing and disallowing first and second electronic vacuum pumps to operate for each braking situation according to vehicle state information associated with braking. The first and second electronic vacuum pumps are driven individually or concurrently according to the determined braking situation. Thus, an optimal negative pressure optimal suitable for the vehicle state information is easily supplied to a booster.

A control device is applied to a vehicle that has a braking device configured to be able to adjust the braking force applied to the vehicle. The control device has a stopping braking force imparting unit that controls the braking device in order to apply a stopping braking force to the vehicle, as a minimum value of the braking force required to keep the vehicle stopped. The control device also has a deviation quantity deriving unit that derives a deviation quantity between a state quantity of the vehicle obtained when the stopping braking force is applied to the vehicle by the stopping braking force imparting unit and an ideal value of the state quantity of the vehicle. The control device also has a stopping braking force updating unit that updates the stopping braking force on the basis of the deviation quantity derived by the deviation quantity deriving unit.