Patent application number | Description | Published |
20080255732 | BRAKING CONTROL APPARATUS FOR VEHICLE - 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. | 10-16-2008 |
20080255744 | Brake Control 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. | 10-16-2008 |
20090024289 | Braking Control Device - Braking discomfort applied to the driver is minimized. Provided are a brake operation amount section ( | 01-22-2009 |
20090095562 | STEERING CONTROL DEVICE FOR VEHICLE - A steering control device for a vehicle includes a first adjustment value determination means for determining a first adjustment value of a value corresponding to a wheel steering angle based on an actual value and a target value of turning state quantity, the first adjustment value is a value directing to approximate the actual value to the target value, and a steering control means for adjusting the wheel steering angle by modifying the value corresponding to the wheel steering angle based on the first adjustment value, wherein the first adjustment value determination means includes an index value obtaining means for obtaining an index value indicating a probability of an occurrence of a side-slip of a wheel and a regulation means for regulating the first adjustment value so that the greater the probability of the occurrence of the side-slip is, the smaller the first adjustment value is set to be. | 04-16-2009 |
20090187322 | Motion Control Device for Vehicle - A motion control device for a vehicle includes a vehicle speed obtaining means for obtaining a speed of the vehicle, a curve shape obtaining means for obtaining a shape of a curve existing ahead of the vehicle on a road on which the vehicle is traveling, a position obtaining means for obtaining a relative position of the vehicle to the curve, a determining means for determining an appropriate vehicle speed for the vehicle to travel through the curve based on the shape of the curve obtained by the curve shape obtaining means, and a speed reduction controlling means for performing a speed reduction control on the vehicle based on the appropriate vehicle speed determined by the determining means. | 07-23-2009 |
20090198426 | MOTION CONTROL DEVICE FOR VEHICLE - A motion control device for a vehicle includes a vehicle speed obtaining device, a curvature obtaining device for obtaining a bending grade of a curve existing ahead of the vehicle, a position obtaining device for obtaining a relative position between the vehicle and the curve, a determination device for determining an appropriate vehicle speed for the vehicle passing through the curve based on the bending grade, a speed reduction control device for executing a speed reduction control for reducing the vehicle speed based on the vehicle speed and the relative position so that the vehicle passes through the curve at the appropriate vehicle speed, and a gradient obtaining device for obtain a gradient of the road on the curve existing in a traveling direction of the vehicle, wherein the determination device determines the appropriate vehicle speed based on the gradient of the road in addition to the bending grade. | 08-06-2009 |
20090248250 | STEERING CONTROL DEVICE FOR VEHICLE - A steering control device for a vehicle includes a yawing value obtaining means for obtaining a yawing value corresponding to a yawing motion of the vehicle, a stabilizing force calculating means for calculating a stabilizing force for assisting an operation of a steering operation member, operated by a driver for steering a steered wheel of the vehicle, in a direction opposite to a direction of the yawing motion of the vehicle, on the basis of the yawing value, and a force applying means for applying the stabilizing force to the steering operation member in the direction opposite to the yawing motion direction, wherein the stabilizing force calculating means includes a counter-steer value calculating means for calculating a counter-steer value indicating a degree of steering the steered wheel in the direction opposite to the yawing motion direction, and wherein the stabilizing force is adjusted based on the counter-steer value. | 10-01-2009 |
20090248269 | MOTION CONTROL DEVICE FOR VEHICLE - A motion control device for a vehicle includes a controlling means for maintaining a traveling stability of the vehicle by controlling a braking force of a wheel of the vehicle, a friction coefficient obtaining means for obtaining a friction coefficient of a road surface on which the vehicle travels, a lateral force reference value calculating means for calculating a lateral force reference value acting on the wheel on the basis of the friction coefficient of the road surface and a lateral force actual value obtaining means for obtaining a lateral force actual value acting on the wheel, wherein the controlling means controls the braking force on the basis of a comparison result between the lateral force reference value and the lateral force actual value. | 10-01-2009 |
20100082212 | SPEED CONTROL DEVICE FOR VEHICLE - A speed control device includes: a reference point setting unit that sets, based on shape and position of a curve in advance of a vehicle, first and second reference points within the curve, the second reference point being nearer the curve exit than the first reference point; a distance calculating unit that calculates, based on the vehicle location and the reference points, first and second distances, between the vehicle and the first and second reference points, respectively; a target speed determination unit that determines, based on the curve shape and the first and second distances, the first and second target vehicle speeds to be maintained, respectively, before and after passing the first reference point; and a speed control unit that controls the speed of the vehicle based on the target speeds and the detected speed of the vehicle. | 04-01-2010 |
20100082216 | SPEED CONTROL DEVICE FOR VEHICLE - A speed control device for a vehicle includes a vehicle speed obtaining means obtaining a vehicle speed, a shape obtaining means obtaining a curve shape, a position obtaining means obtaining a positional relationship between a curve and the vehicle, a target vehicle speed determining means determining a target vehicle speed based on the curve shape and the positional relationship, a vehicle speed controlling means controlling the vehicle speed based on the target vehicle speed and the vehicle speed, and an acceleration operation quantity obtaining means obtaining an operation quantity of an acceleration operating member operated by a driver, wherein the target vehicle speed determining means includes a modification means modifying the target vehicle speed based on the operation quantity so that the target vehicle speed obtained when the operation variable is greater than zero becomes a greater value than the target vehicle speed obtained when the operation quantity is zero. | 04-01-2010 |
20100161180 | MOTOR-DRIVEN STEERING CONTROLLER AND AUTOMOBILE ANTI-SKID CONTROLLER - A motor-driven steering controller for controlling a steering wheel of a vehicle. The controller includes a steering torque controlling unit, a braking force estimating unit, a right and left braking force difference estimating unit and an assist steering torque providing unit. The steering torque controlling unit controls a steering torque on the steering wheel depending on a steering operation. The braking force estimating unit estimates braking forces to be imposed on wheels of the vehicle. The right and left braking force difference estimating unit estimates difference between the braking forces to be imposed on the right and left wheels each estimated by the braking forces estimating unit. The assist steering torque providing unit provides an assist steering torque for the steering torque controlling unit on the basis of the difference in braking force between right and left wheels estimated by the right and left braking force difference estimating unit. | 06-24-2010 |
20100268419 | MOTION CONTROL DEVICE FOR VEHICLE - A motion control device for a vehicle having a braking means for applying a brake toque to a wheel of the vehicle and maintaining a traveling stability of the vehicle by controlling the braking means, the motion control for the vehicle, includes a steering angular velocity obtaining means for obtaining a steering angular velocity of the vehicle, a maximum steering angular velocity calculating means for calculating a maximum steering angular velocity on the basis of the steering angular velocity, a determining means for determining a reference turning state quantity on the basis of the maximum steering angular velocity, an actual turning state quantity obtaining means for obtaining an actual turning state quantity of the vehicle, and a control means for controlling the brake toque on the basis of the reference turning state quantity and the actual turning state quantity. | 10-21-2010 |
20100268420 | MOTION CONTROL DEVICE FOR VEHICLE - A motion control device for a vehicle, including a braking means for applying a brake torque to a wheel of the vehicle and maintaining a traveling stability of the vehicle by controlling the braking means, the motion control device for the vehicle, includes a steering angular velocity obtaining means for obtaining a steering angular velocity of the vehicle, a yaw angular acceleration obtaining means for obtaining a yaw angular acceleration of the vehicle, and a control means for controlling the brake torque on the basis of the steering angular velocity and the yaw angular acceleration. | 10-21-2010 |
20110035129 | MOTION CONTROL DEVICE FOR VEHICLE - A motion control device for a vehicle includes a braking means for applying a brake torque to each of a plurality of wheels of the vehicle, an avoidance control means for calculating a first target quantity, used for an avoidance control for applying the brake torque to each wheel via the braking means in order to avoid an emergency state of the vehicle, a stabilization control means for determining a target wheel, to which the brake torque is applied, out of the wheels and calculating a second target quantity used for a stabilization control for applying the brake torque to the target wheel in order to ensure a vehicle stability, and a brake control means for controlling the brake torque applied to a non-target wheel based on the first target quantity and controlling the brake torque applied to the target wheel based on the first and second target quantities. | 02-10-2011 |
20110035131 | SPEED CONTROL APPARATUS FOR VEHICLE - A plurality of position data sets representing a plurality of points on a road ahead of a vehicle are acquired, and the degree of curvature of the road at each point is computed. On the basis of the degree of curvature, a constant curvature degree section of a curve is identified, and the degree of curvature and the end position of the constant curvature degree section are determined. In order to cause the vehicle to properly pass through the curve, curve deceleration control is executed on the basis of the actual vehicle speed, a proper vehicle speed determined from the degree of curvature, and the end position of the constant curvature degree section. That is, the curve deceleration control is performed on the basis of the start point of a section of a curve having the maximum degree of curvature and the constant degree of curvature of that section. | 02-10-2011 |
20110160963 | VEHICLE SPEED CONTROL DEVICE - A vehicle speed control device is provided. The device includes a steering device which steers left and right wheels, first and second electric motors which separately apply power to the left and right wheels, an operation amount acquisition unit which acquires an acceleration operation amount by the driver of the vehicle, a steering angle acquisition unit which acquires a steering angle which is a value between an inner wheel steering angle and an outer wheel steering angle; a vehicle speed acquisition unit configured to acquire an actual speed of the vehicle; and a control unit configured to control the first electric motor and the second electric motor on the basis of the acceleration operation amount, the actual speed, the steering angle, and a steering geometry indicating a geometric relationship between the steering angle and a turning center of the vehicle. | 06-30-2011 |
20110198165 | BRAKING CONTROL APPARATUS FOR VEHICLE - 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. | 08-18-2011 |
20140081546 | MOTION CONTROL DEVICE FOR VEHICLE - A motion control device for a vehicle includes a braking means for applying a brake torque to each of a plurality of wheels of the vehicle, an avoidance control means for calculating a first target quantity, used for an avoidance control for applying the brake torque to each wheel via the braking means in order to avoid an emergency state of the vehicle, a stabilization control means for determining a target wheel, to which the brake torque is applied, out of the wheels and calculating a second target quantity used for a stabilization control for applying the brake torque to the target wheel in order to ensure a vehicle stability, and a brake control means for controlling the brake torque applied to a non-target wheel based on the first target quantity and controlling the brake torque applied to the target wheel based on the first and second target quantities. | 03-20-2014 |
20140136070 | MOTION CONTROL DEVICE FOR VEHICLE - A motion control device for a vehicle, including a braking means for applying a brake torque to a wheel of the vehicle and maintaining a traveling stability of the vehicle by controlling the braking means, the motion control device for the vehicle, includes a steering angular velocity obtaining means for obtaining a steering angular velocity of the vehicle, a yaw angular acceleration obtaining means for obtaining a yaw angular acceleration of the vehicle, and a control means for controlling the brake torque on the basis of the steering angular velocity and the yaw angular acceleration. | 05-15-2014 |
20150081186 | BRAKING CONTROL DEVICE FOR VEHICLE - Based on a difference (ΔFb) between a target value (Fbt) and an actual value (Fba) of a friction member force for pressing a brake disc, a feedback energization amount (Ipt) is calculated using a proportional gain smaller than an ultimate sensitivity gain. If ΔFb falls within a fluctuation range of torque ripple, a first compensation energization amount (Ibt) is calculated using a proportional gain larger than the ultimate sensitivity gain, and if ΔFb falls outside the fluctuation range, the first compensation energization amount (Ibt) is calculated to be constant. A second compensation energization amount (Ift) is calculated based on a calculation characteristic that is preset based on a torque fluctuation over a predetermined range of an electric motor position and based on an actual position of the electric motor. An indication energization amount calculated according to Fbt is adjusted by Ipt, Ibt, and Ift to calculate a target energization amount. | 03-19-2015 |