vehicle control device

A vehicle control device and vehicle technology, which are applied to the safety devices, vehicle components, brakes, etc. of the power plant control mechanism, and can solve the problems of reduced vehicle passability and stalls.

Active Publication Date: 2018-01-30
ADVICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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no. 1 approach

[0034] figure 1 It is a diagram showing a system configuration of a braking and driving system of a vehicle to which the vehicle control device according to the first embodiment of the present invention is applied. Here, the vehicle posture control device according to one embodiment of the present invention is applied to four-wheel drive mainly in front-wheel drive in which the front wheel side is used as a main drive wheel and the rear wheel side is used as a driven wheel. The case of a vehicle will be described, but it can also be applied to a four-wheel drive vehicle mainly driven by rear wheels in a drive system in which the rear wheels are used as main drive wheels and the front wheels are used as driven wheels.

[0035] Such as figure 1 As shown, the drive system of a 4-wheel drive vehicle has an engine 1, a transmission 2, a driving force distribution control actuator 3, a front drive shaft 4, a rear drive shaft 5, a front differential 6, a front drive shaft 7, and a r...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/175
CPCB60T8/175
Inventor 石田康人
Owner ADVICS CO LTD
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