Vehicle control device

Abstract

To enable control of the speed of a vehicle according to the intentions of a driver by means of a simpler operation. In the present invention, when a vehicle body speed (V0) rapidly decreases and becomes lower than a brake target threshold speed (TVB), the brake target threshold speed (TVB) is decreased in conformity with the vehicle body speed (V0). The present invention can thereby prevent the increase of the vehicle body speed (V0) toward the brake target threshold speed (TVB) such that a vehicle accelerates regardless of a brake being in operation because the brake target threshold speed (TVB) is set at a higher value than the vehicle body speed (V0). Accordingly, the present invention causes the vehicle body speed (V0) to decelerate by means of a simpler operation while being able to prevent the vehicle from accelerating against the intentions of a driver and being able to control the speed of the vehicle according to the intentions of the driver.

Description

technical field [0001] The present invention relates to a vehicle control device capable of smoothly running a vehicle, and is suitable for running on a road surface that may hinder the running of the vehicle, such as off-road and slopes. Background technique [0002] Conventionally, in Patent Document 1, it is disclosed that for the purpose of improving the passability in off-road, when the gear of the auxiliary transmission equipped on the four-wheel drive vehicle is a low-speed gear, the allowable slippage of the driving wheel is reduced. Vehicle traction control device. In this device, slippage suppression control is performed by reducing the allowable slippage of the drive wheels, so that traction force control that emphasizes trafficability according to the driver's intention can be performed. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2000-344083 [0004] However, even if the idling suppression control is performed by reducing the allowable slip, if t...

AI Technical Summary

Problems solved by technology

[0004] However, even if the idling suppression control is performed by reducing the allowable slippage, if the accelerator pedal is not depressed in order to overcome road surface resistance such as a slope of the road surface and a step difference, it will not be possible to drive smoothly off-road or on a slope.

That is, on off-road and steeply inclined slopes such as gravel roads, since the running state of the vehicle changes moment by moment, and the vehicle body shakes greatly as the vehicle travels, the driver responds accordingly to the changing running state. Proper acceleration and braking operations are difficult

Therefore, in the control such as the device described in Patent Document 1, which reflects the acceleration and braking operations as they are in the driving force and braking force, and suppresses the acceleration after the start of slipping, it is impossible to run smoothly on off-road or on slopes.

In particular, there are cases where the driver's intention and the acceleration and deceleration of the vehicle deviate, such as when the vehicle rushes out after overcoming an obstacle, or when the vehicle accelerates on a steep downhill slope.

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