Abstract:
A road slope determining apparatus for a vehicle includes a slope measuring device that measures a slope of a road on which the vehicle is traveling; a distance measuring device that measures a distance traveled by the vehicle; and a determining apparatus that determines, based on the measured slope and the measured distance traveled, whether the vehicle is traveling on a gradient in which the slope is continuous or on a rough road in which the slope is discontinuous. This road slope determining apparatus is able to appropriately determine whether the road has a slope when the vehicle is traveling at slow speeds such as when running off-road, for example.
Abstract:
A vehicle device control device includes an automatic drive control device for executing an automatic drive control by controlling at least a driving torque generating device, which applies a driving torque on a vehicle, so that a vehicle speed reaches a preset target vehicle speed, and a shift position determination portion for determining a shift position of a gear lever of the vehicle, wherein in a case where the shift position determination portion determines that the gear lever is set at a neutral position on the basis of a determination result of the shift position determination portion while the automatic drive control is executed, the automatic drive control device controls the driving torque generating device so that the driving torque applied to the vehicle becomes zero while continuously executing the automatic drive control.
Abstract:
A vehicle control apparatus controlling a driving force or a braking force to be applied to a vehicle and conducting a vehicle control based on wheel speeds includes a detecting means detecting the wheel speed of each wheel provided at the vehicle, a storing means storing a predetermined valid wheel speed for each wheel, a determining means determining whether a difference between the detected wheel speed and a maximum wheel speed of the wheel speeds lies in a predetermined range, and an updating means updating the valid wheel speed based on the detected wheel speed of the wheel, when the detected wheel speed is lower than the predetermined valid wheel speed which is currently stored, in case that a result determined by the determining means is positive.
Abstract:
A vehicle control device for controlling the driving force and the braking force that is applied to a vehicle to approach a target wheel speed includes a plurality of determination parts that determine the wheel speed at a corresponding wheel; and a calculation part that calculates a valid wheel speed threshold for each wheel based on determined wheel speeds. The vehicle control device also includes a decision part that decides whether wheel speed is valid depending on whether the valid wheel speed threshold calculated for each wheel is below a specific speed threshold value, which is below the target wheel speed, and an estimation part that estimates the vehicle speed using the wheel speeds that are determined as being valid.
Abstract:
An electronic control device reduces, after a time at which constant speed traveling control is terminated (specific control termination time) not by an accelerating operation or braking operation but by, for example, an operation of a control switch, the vehicle driving force to a force corresponding to the amount of accelerating operation at the specific control termination time. Also, the electronic control device changes the vehicle braking force to a force corresponding to the amount of braking operation at the specific control termination time by controlling the braking hydraulic pressures with a hydraulic pressure circuit so that the value of a vehicle propulsive force, which takes a positive value when acting in the same direction as the driving force (and takes a negative value when acting in the opposite direction of the driving force) and which has a magnitude equal to a value resulting from subtracting the magnitude of the braking force from the magnitude of the driving force, is equal to or smaller than the value of the vehicle propulsive force at the specific control termination time.
Abstract:
A vehicle controller includes an obstacle-determining portion and a driving torque reducing portion. The obstacle-determining portion determines whether the vehicle is climbing up an obstacle, more specifically, whether the vehicle starts climbing up the obstacle. Then, the driving torque reducing portion performs a driving torque reduction control when it is determined that the vehicle is climbing up onto the obstacle.
Abstract:
A vehicle running control apparatus, which performs automatic running control by controlling an engine for applying a driving torque to a vehicle C and a brake device for applying a braking torque to the vehicle C such that a vehicle speed of the vehicle C becomes equal to a preset target vehicle speed, determines, on the basis of a target driving torque ETo calculated to apply the driving torque to the vehicle C and a target braking torque BTo calculated to apply the braking torque to the vehicle C, whether or not the vehicle C is running on a road difficult to run on, when automatic running control is performed. When it is determined that the vehicle C is running on the road difficult to run on, automatic running control is terminated.
Abstract:
A braking force maintaining apparatus executes hill-hold control in which braking force applied to each of wheels of a vehicle is maintained by a braking device even after release of a brake pedal. An electronic control unit determines whether the yaw rate of the vehicle is greater than or equal to a predetermined threshold value and whether the wheels are held in a locked state by the braking force applied by the braking device. If the wheels are held in the locked state and the yaw rate is greater than or equal to the threshold value, the electronic control unit controls the braking device in such a manner that the braking force acting on two or more of wheels including at least a specific wheel falls below the braking force at the start of the hill-hold control. The specific wheel is one of steered wheels that corresponds to an outer wheel when the steered wheels are steered through manipulation of the steering wheel intended to correct an offset posture of the vehicle that causes generation of the yaw rate.
Abstract:
A brake control system includes an ECU having an estimate part which is so constructed as to: totalize an influent amount of fluid in a brake actuator in accordance with an output time of a valve opening drive signal of a control signal and a supply amount per unit time of fluid in a pressure control valve; estimate an amount of fluid in the brake actuator in accordance with the influent amount as totalized; estimate a value of the fluid pressure within the brake actuator in accordance with the amount of fluid as estimated; and carry out correction for obtaining a supply amount of fluid in the brake actuator when a time of retaining operation performed by the control signal is smaller than a predetermined value, correction being performed by adding a correction value corresponding to the time to the output time of the valve opening drive signal of the control signal.