vehicle control device

Abstract

The present invention performs traction force control that is more in line with the running state of the vehicle, and improves the passability of the vehicle. The brake control amount is corrected according to the degree of the stall avoidance request, and becomes the brake control amount in the running state. For example, when the vehicle body speed is low, the vehicle is often driven on a difficult road surface, and the stall avoidance request is relatively small. At this time, wheel slip suppression by brake control is performed more strongly, and the LSD effect is exerted to improve passability, and greater deceleration is generated to improve safety. Moreover, it is considered that if the speed of the vehicle body is increased, it is possible to escape from the position where driving is difficult, and the degree of stall avoidance request is high, so switching is performed in such a way that the brake control amount is reduced to prevent the situation where the driver wants to travel more quickly. In this situation, a large braking force is generated and the speed requested by the driver cannot be obtained.

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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