Abstract:
In a vehicle travel controlling apparatus including an automatic travel controlling ECU that controls a vehicle in a predetermined travel state by cooperation control of a vehicle driving amount and a vehicle braking amount, the automatic travel controlling ECU is provided with an automatic travel termination controlling unit. The automatic travel termination controlling unit obtains a brake fluid pressure during the cooperation control according to the vehicle driving amount during the cooperation control and a gradient of a road surface on which a vehicle is travelling. When the brake fluid pressure corresponding to a braking operation of a driver is more than the brake fluid pressure during the cooperation control, the automatic travel termination controlling unit terminates the cooperation control to switch operation to a braking operation according to the brake fluid pressure corresponding to the braking operation.
Abstract:
A vehicle cruise control apparatus includes a vehicle speed adjusting device that adjusts a vehicle speed to a set target vehicle speed, a brake operation detecting device that detects brake operation performed by a driver, and a first controller that controls the vehicle speed adjusting device based on a target driving force that maintains a vehicle in a stopped condition, when the brake operation performed by the driver is detected.
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:
An antiskid control system for a four-wheel-drive vehicle is arranged to calculate a difference between an average of wheel accelerations of front wheels and an average of wheel acceleration of rear wheels. When the difference is greater than or equal to the vibration determination threshold, the antiskid control system determines that a driveline vibration is generated and executes a control for converging the driveline vibration.
Abstract:
An antiskid control system for a four-wheel-drive vehicle is arranged to calculate a difference between an average of wheel accelerations of front wheels and an average of wheel acceleration of rear wheels. When the difference is greater than or equal to the vibration determination threshold, the antiskid control system determines that a driveline vibration is generated and executes a control for converging the driveline vibration.
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.