Vehicle control device

Abstract

To achieve increases in the ground-covering properties of a vehicle and to execute traction control that is better matched to the travel state of a vehicle. In the present invention the amount of brake control is corrected in accordance with the degree of stall prevention requests such that the amount of brake control is matched to a travel state. For example, when the speed of a vehicle body is low, the vehicle body is often traveling a road surface that is difficult to travel, and the degree of stall prevention requests is small. In such cases, the present invention exhibits LSD effects and increases ground-covering properties by executing vehicle wheel slip control based on stronger brake control, while increasing safety properties by better enabling generation of deceleration. Then, as the speed of the vehicle body increases, because it is conceivable that the vehicle body is leaving a place that is difficult to travel and the degree of stall prevention requests is high, the present invention executes switching such that brake control is lowered and, under conditions in which a driver wants to travel faster, prevents failure to obtain the speeds requested by the driver because of unwanted generation of large braking force.

Description

technical field [0001] The present invention relates to a vehicle control device capable of smooth running of a vehicle, and is suitable for running on road surfaces 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 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 drive wheel is reduced ( target slip) traction control device for vehicles. In this device, slippage suppression control is performed by reducing allowable slippage of the drive wheels, thereby enabling traction control (hereinafter referred to as TRC (registered trademark)) that emphasizes trafficability according to the driver's intention. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2000-344083 [0004] However, even if the idling suppression contro...

AI Technical Summary

Problems solved by technology

[0005] Here, when driving off-road, there is a driving state in which braking force is applied and driving force is transmitted from the slipping wheel to other wheels to improve passability, and the braking force applied is excessive at the moment when the slip disappears, causing the vehicle to stall, causing the vehicle to stall. Driving state with reduced passability

[0006] Conventionally, when the auxiliary transmission is at a low speed, the permissible slip is reduced and a large braking force is applied to improve passability. However, there are cases where TRC is performed differently from the actual driving state, and the passability of the vehicle is degraded on the contrary.

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