Abstract:
If a condition for finishing speed limit control is satisfied, a gradient of a slope of the road is estimated based on a steady component of the longitudinal acceleration of the vehicle, and a correction factor is computed based on the slope gradient of the road, while a target acceleration of the vehicle is computed based on the vehicle speed. Then, a target vehicle speed is computed by adding the target vehicle speed of the last cycle to the product of the correction factor, target acceleration and the cycle time of the control, and the braking or driving force of each wheel is controlled so that the vehicle speed becomes equal to the target vehicle speed. In this manner, a passenger of the vehicle is prevented from feeling uncomfortable about the speed increase after the completion of the vehicle speed limit control.
Abstract:
A vehicle travel control device has a engine that controls an engine based on a driving target controlled variable; a brake that controls a brake device based on a braking target controlled variable; and a automatic travel control that calculates the driving target controlled variable and/or braking target controlled variable so that a vehicle speed of a vehicle becomes a target vehicle speed, and outputs the driving target controlled variable to the engine and the braking target controlled variable to the brake, the vehicle travel control device being configured such that, upon detection of an acceleration operation during the vehicle travel control, the automatic travel control calculates a target vehicle speed for vehicle travel control by the brake device, so that the target vehicle speed becomes higher than a current vehicle speed of the vehicle.
Abstract:
A running control apparatus for a vehicle includes a required driving output deciding unit that decides a required driving force of a driving system of the vehicle on the basis of an integrated value of a difference between a target vehicle speed and an actual vehicle speed, a driving control unit that controls the actuation of the driving system on the basis of the required driving force, and a determination unit that determines whether or not the required driving force is unrealizable in the control of the driving system due to the intervention of additional control. The required driving output deciding unit imposes a limit on an increase or a decrease in the required driving force when the determination unit determines that the required driving force is unrealizable in the control of the driving system.
Abstract:
A vehicle travel control device has a engine that controls an engine based on a driving target controlled variable; a brake that controls a brake device based on a braking target controlled variable; and a automatic travel control that calculates the driving target controlled variable and/or braking target controlled variable so that a vehicle speed of a vehicle becomes a target vehicle speed, and outputs the driving target controlled variable to the engine and the braking target controlled variable to the brake, the vehicle travel control device being configured such that, upon detection of an acceleration operation during the vehicle travel control, the automatic travel control calculates a target vehicle speed for vehicle travel control by the brake device, so that the target vehicle speed becomes higher than a current vehicle speed of the vehicle.
Abstract:
If a condition for finishing speed limit control is satisfied, a gradient of a slope of the road is estimated based on a steady component of the longitudinal acceleration of the vehicle, and a correction factor is computed based on the slope gradient of the road, while a target acceleration of the vehicle is computed based on the vehicle speed. Then, a target vehicle speed is computed by adding the target vehicle speed of the last cycle to the product of the correction factor, target acceleration and the cycle time of the control, and the braking or driving force of each wheel is controlled so that the vehicle speed becomes equal to the target vehicle speed. In this manner, a passenger of the vehicle is prevented from feeling uncomfortable about the speed increase after the completion of the vehicle speed limit control.
Abstract:
An executed time of a backward slipping moderation control is counted by a timer, and after a predetermined period of time is elapsed, the control is terminated. Upon the termination of the control, a control of operation of a brake actuator is executed so that a wheel cylinder pressure is decreased with a gentle slope in comparison with a normal operation of the brake actuator for terminating the control. Where the backward slipping moderation control is executed by controlling a brake fluid pressure of the brake actuator, an acceleration &agr; of a vehicle is estimated. If the acceleration is larger than a predetermined value, a target pressure P is increased, thus generating a relatively large braking force.
Abstract:
When it is detected that a wheel speed vFL of at least one specific wheel WFL is nearly equal to zero but wheel speeds vFR, vRL, vRR of the other wheels WFR, WRL, WRR are not nearly equal to zero, the apparatus judges that the wheel speed vFL of the specific wheel WFL is abnormal, but cancels the abnormality judgment in a stuck state even if the wheel speed vFL of the specific wheel WFL was judged as being abnormal.
Abstract:
A slip control apparatus includes a driving torque calculating means calculating driving torque, a driving torque applying means applying the calculated driving torque to driving wheels, and a slip restraining means restraining slippage at each driving wheel when the slippage occurs at each driving wheel, wherein when the slippage occurs at each driving wheel, the driving torque calculating means calculates demanded torque and adds consumed driving torque, which corresponds to the driving torque consumed for restraining the slippage at each driving wheel by the slip restraining means, to the calculated demanded torque to calculate the driving torque.
Abstract:
A system for controlling a vehicle that controls driving force and braking force such that a vehicle speed is maintained at a target vehicle speed. More specifically, when the vehicle speed exceeds the target vehicle speed, the system for controlling a vehicle maintains the driving force at or above a predetermined value, and applies braking force to the vehicle such that the vehicle speed is maintained at the target vehicle speed. This provides the vehicle with sufficient driving force for uphill driving following the downhill driving, and thus to travel uphill without significant speed loss. In other words, the vehicle ascends the uphill road smoothly at an approximately constant speed.
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.