A vehicle brake system is provided with a brake ECU serving as controlled hydraulic brake force control means for executing a controlled hydraulic brake force control to decrease the rotational speed of an electric motor when at least both of a regenerative brake force and a controlled hydraulic brake force are being applied. The brake ECU decreases the rotational speed of the electric motor when the gradient of a target controlled hydraulic brake force being a controlled hydraulic pressure command value given to a hydraulic brake device is downhill or is not present. Thus, the pressured fluid supplied from a pump driven by the electric motor to be supplied to wheel cylinders of a vehicle is decreased to enhance the efficiency in utilizing the regenerative energy which an electric motor for driving the vehicle has in dependence on the stepping state of a brake pedal.

Vehicle brake system

Provided is an electric brake device capable of early detection of the presence/absence of an abnormality of the electric brake device when a brake operation means is not being operated while a vehicle is traveling. A control device (9) of this electric brake device is equipped with: a basic control means (36a) that imparts a braking force by causing an electric motor (2) to operate in response to an operation performed on a brake operation means (4) by the driver; and an abnormality detection operation control means (36b) that causes the electric motor (2) to operate in accordance with a preset condition when the brake operation means is not being operated while the vehicle is traveling. Furthermore, the control device is equipped with an abnormality detection unit (37) that obtains a measurement value of a predetermined item pertaining to the vehicle when the electric motor (2) is caused to operate by the abnormality detection operation control means (36b) and compares the measurement value with an estimated value or a preset value in order to detect the presence/absence of an abnormality of the electric brake device.

Electric brake device

A braking apparatus for a vehicle includes a hydraulic brake apparatus generating a basic hydraulic pressure so that a basic hydraulic braking force is generated at wheels, the hydraulic brake apparatus generating a controlled hydraulic pressure so that a controlled hydraulic braking force is generated at the wheels, a regenerative brake apparatus causing a regenerative braking force to be generated at any of the wheels, and braking force replacement controlling means for gradually replacing the regenerative braking force with the controlled hydraulic braking force while braking during which at least the regenerative braking force is applied for a purpose of achieving a braking force replacement control to ensure a total braking force required for the wheels by decreasing the regenerative braking force at a gradient within a predetermined range and by increasing the controlled hydraulic braking force in response to the decrease of the regenerative braking force.

Braking apparatus for vehicle

A brake control apparatus for a vehicle includes four wheel braking apparatuses, a first hydraulic pressure generating apparatus, a front-wheel hydraulic circuit connecting the hydraulic pressure generating apparatus to the two of the wheel braking apparatuses, a rear-wheel hydraulic circuit connecting the hydraulic pressure generating apparatus to the other two of the wheel braking apparatuses, a second hydraulic pressure generating apparatus generating an auxiliary pressure, a braking operation variable detecting means, a reference amount determining means for determining a reference amount of auxiliary hydraulic pressure, an obtaining means for obtaining at least one of state quantities indicating a load condition, a driving condition and slipperiness of wheel, a target amount determining means determining a target amount of auxiliary hydraulic pressure of each hydraulic circuit to be equal to or greater than the corresponding reference amount of auxiliary hydraulic pressure, and a pressure regulating means for regulating the auxiliary hydraulic pressure.

Brake control apparatus for vehicle

A vehicle includes: an engine; a planet gear mechanism connected to an output shaft and a drive shaft of the engine; a first motor connected to the planet gear mechanism; a second motor which can input and output a power to/from the drive shaft; and a battery for passing power to the two motors. The vehicle is controlled so that when the battery temperature Tb is below a threshold value Tbref, the intermittent operation of the engine is inhibited and the vehicle travels while the requested torque is outputted to the drive shaft, which is accompanied by battery temperature increase control. When the battery temperature Tb is equal to or above the threshold value Tbre and the engine water temperature Tw is equal to or above a threshold value Twre, control is performed so that the requested torque is outputted to the drive shaft, which is accompanied by the intermittent operation of the engine. When the battery temperature Tb is equal to or above the threshold value Tbref but the engine water temperature Tw is below the threshold value Twref, control is performed so that the intermittent operation of the engine is inhibited and the vehicle travels while the requested torque is outputted to the drive shaft, which is accompanied by continuation of the battery temperature increase control.

Vehicle and its control method

A braking control apparatus for a vehicle includes four wheel braking apparatuses for applying a braking torque to wheels, a first hydraulic pressure generating apparatus generating a hydraulic pressure, a vacuum booster generating an assist force for assisting a breaking operation, a first hydraulic circuit, a second hydraulic circuit, a second hydraulic pressure generating apparatus generating an assist hydraulic pressure that is added to the hydraulic pressure, a detecting portion for detecting a braking operation variable, a target value determining portion for determining a first assist hydraulic pressure target value and a second assist hydraulic pressure target value to be both greater than zero over a range where the braking operation variable is greater than a predetermined value at which the assist force by the vacuum booster is started, and a pressure regulating portion for regulating the assist hydraulic pressure to mach the assist hydraulic pressure target value.

Braking control apparatus for vehicle

PROBLEM TO BE SOLVED: To provide a brake device for a vehicle capable of miniaturizing and reducing the weight of a hydraulic brake device and compensate insufficiency of braking force due to fluctuation of regenerative braking force by a regenerative brake device when regenerative braking force fluctuates by hydraulic braking force by the hydraulic brake device. SOLUTION: This brake device for the vehicle is provided with the hydraulic brake device capable of giving control hydraulic braking force to a wheel corresponding to a wheel cylinder by giving control liquid pressure formed by driving a pump irrespective of brake operation to the wheel cylinder, the regenerative brake device for generating regenerative braking force corresponding to a brake operation condition detected by a brake operation condition detection means for detecting a condition of brake operation in the wheel by a motor driving any of the wheels, and a braking force compensation means for compensating insufficiency of braking force due to fluctuation of regenerative braking force. COPYRIGHT: (C)2006,JPO&NCIPI

Brake device for vehicle and brake control program for vehicle

PROBLEM TO BE SOLVED: To provide a brake controller for a vehicle capable of mechanically generating W/C pressure by operation of a brake operating member by a driver as fail-safe in abnormality. SOLUTION: A route to supply brake fluid to each of W/Cs 6FR to 6RR by using first to fourth pumps 7 to 9 from a master reservoirs 3f is used in normal braking and a route to transmit M/C pressure generated in an M/C 3 by operation of a brake pedal 1 to the W/C 6FR, 6FL of both of front wheels FR, FL through conduit runs A, B, E, F is used in abnormality. First to fourth linear valves SLFR to SLRR are furnished in parallel against each of the pumps 7 to 9, and the W/C pressure generated in each of the W/Cs 6FR to 6RR is governed by duty-controlling them in normal braking. COPYRIGHT: (C)2007,JPO&INPIT

Brake controller for vehicle

PROBLEM TO BE SOLVED: To provide a vehicular posture control device which retains excellent posture of a vehicle by suppressing any uplift or nose dive of a vehicle body when a brake is applied SOLUTION: When generating an arbitrary deceleration as an actual braking force allocation characteristic curve for indicating the relationship of each braking force allocation of front and rear wheels FL-RR set, based on an ideal braking force allocation characteristic curve, the case of the braking force allocation on the actual braking force allocation characteristic curve is compared with the case of the braking force allocation on the ideal braking force allocation characteristic, and the ratio of the braking force allocation of the front wheels FL, FR in the case of the braking force allocation on the actual braking force allocation characteristic curve is set to be lower than that of the front wheels FL, FR in the case of the braking force allocation on the ideal braking force allocation characteristic curve The W/C pressure of the front wheels FL, FR and the W/C pressure of the rear wheels RL, RR according to the braking force allocation are set by obtaining each braking force allocation of the front and rear wheels FL-RR corresponding to the deceleration, based on the actual braking force allocation characteristic curve COPYRIGHT: (C)2007,JPO&INPIT

Vehicular posture control device

This apparatus specifies, based upon the front image that is photographed by a front camera 65 f before the present time by a predetermined time, the position (point A) of the "object" in the front image by utilizing the difference in brightness, and specifies, based upon the rear image photographed by a rear camera 65 r at the present time, the position (point C) of the object same as the aforesaid "object" in the rear image by utilizing the difference in brightness. This apparatus obtains the displacement amount m in the image lateral direction of the position (point C) of the specified "same object" in the rear image with respect to the position (point B) of the aforesaid "same object" in the rear image that is to be specified supposing that the vehicle body slip angle theta is "0", and detects the vehicle body slip angle theta according to the equation of "theta=tan-1(m/L)" (L: camera-to-camera distance).

Vehicle body slip angle detecting apparatus, vehicle body slip angle detecting method, and vehicle motion control apparatus provided with the vehicle body slip angle detecting apparatus

Kazuya Maki

Papers

Braking control apparatus for vehicle

Brake device for vehicle and brake control program for vehicle

Brake controller for vehicle

Vehicular posture control device

Vehicle body slip angle detecting apparatus, vehicle body slip angle detecting method, and vehicle motion control apparatus provided with the vehicle body slip angle detecting apparatus