KR-20260064899-A - Vehicle Control System and Vehicle Control Method

KR20260064899AKR 20260064899 AKR20260064899 AKR 20260064899AKR-20260064899-A

Abstract

A vehicle control system according to one embodiment of the present invention includes a noise measuring device that measures noise generated from at least one of the vehicle wheels during vehicle driving, a processor that determines the road surface condition based on the measured noise, and a control unit that controls the vehicle according to the road surface condition determined by the processor, wherein the processor estimates the friction coefficient of the road surface, and the control unit can control a steering device, a suspension device, a driving device, a braking device, and an ADAS device according to the road surface condition and the friction coefficient.

Inventors

김건우

Assignees

현대모비스 주식회사

Dates

Publication Date: 20260508
Application Date: 20241030

Claims (10)

A noise measuring device for measuring noise generated from at least one of the vehicle wheels when the vehicle is driven; A processor that determines road surface conditions based on measured noise; A control unit that controls the vehicle according to the road surface condition determined by the above processor; A vehicle control system comprising, wherein the processor estimates the friction coefficient of the road surface, and the control unit controls the steering device, suspension device, driving device, braking device and ADAS device according to the road surface condition and the friction coefficient.
In paragraph 1, The above control unit is a vehicle control system that receives driving information of the vehicle and controls the vehicle according to the driving information, the road surface condition, and the friction coefficient.
In paragraph 2, A vehicle control system that determines whether the road surface is paved, whether it is a wet road surface, or whether it is a snow-covered road surface, and estimates the friction coefficient according to the road surface condition.
In paragraph 3, The above ADAS device A first sensor for detecting a forward collision object; An AEB device that performs braking when the detection distance detected by the first sensor is less than or equal to a first reference value; A second sensor for detecting the distance between vehicles; An SCC device that adjusts the distance between vehicles detected by the second sensor to a second reference value; A vehicle control system comprising, wherein the first reference value and the second reference value are set to be inversely proportional to the friction coefficient estimated by the processor.
In paragraph 3, A vehicle control system in which the above-described control unit controls the steering torque value of the above-described steering device, and the steering torque value is set to be proportional to the friction coefficient estimated by the above-described processor.
In paragraph 3, A vehicle control system in which the above-described control unit controls the braking force of the above-described braking device, and the braking force is set to be inversely proportional to the friction coefficient estimated by the above-described processor.
In paragraph 3, A vehicle control system in which the above-described control unit controls the damping force of the above-described suspension system, and the above-described control unit reduces the damping force when the above-described processor determines that the road surface condition is an unpaved road.
In paragraph 3, A vehicle control system in which the above-described control unit controls the driving torque of the above-described driving device, and the driving torque is set to be proportional to the friction coefficient estimated by the above-described processor.
In paragraph 3, A shooting device for photographing the road surface; A vehicle control system further comprising, wherein the processor determines the road surface condition and estimates the friction coefficient through noise measured by the noise measuring device and an image captured by the imaging device.
The stage where the vehicle starts driving; A step of collecting driving information of the above vehicle; A step of measuring noise generated between the vehicle's wheels and the road surface; Step for determining road surface condition; A step of estimating the coefficient of friction between the vehicle's wheel and the road surface; and Steps for controlling vehicle functions; A vehicle control method comprising, wherein the step of controlling the vehicle function controls the ADAS device, steering device, braking device, suspension device and drive device of the vehicle.

Description

Vehicle Control System and Vehicle Control Method The present invention relates to a vehicle control system, and more specifically, to a vehicle control system capable of optimizing vehicle functions according to road surface conditions. In vehicle operation, technologies for controlling various vehicle functions are being researched to improve passenger comfort and safety. In controlling these various vehicle functions, it is important to acquire information on road surface conditions and respond accordingly. The coefficient of friction between the vehicle wheels and the road surface varies significantly depending on the condition of the road surface, such as paved roads, unpaved rough roads, wet roads, or snow-covered roads, and it is necessary to control vehicle functions according to this coefficient of friction to improve ride comfort and safe driving. FIG. 1 is a drawing illustrating a vehicle to which a vehicle control system according to one embodiment of the present invention is applied. FIG. 2 is a diagram illustrating a vehicle control method according to one embodiment of the present invention. FIG. 3 is a diagram illustrating a vehicle control system according to an embodiment of the present invention controlling an ADAS device. FIG. 4 is a diagram illustrating a vehicle control system according to one embodiment of the present invention controlling a steering device. FIG. 5 is a diagram illustrating a vehicle control system according to an embodiment of the present invention controlling a braking device. FIG. 6 is a diagram illustrating a vehicle control system according to one embodiment of the present invention controlling a suspension system. FIG. 7 is a diagram illustrating a vehicle control system according to one embodiment of the present invention controlling a driving device. The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. In describing the present invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the present invention. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Furthermore, throughout the specification, when the term "connected" is used, it does not mean only that two or more components are directly connected, but may also mean that two or more components are indirectly connected through other components, that they are connected not only physically but also electrically, or that they are a single unit although referred to by different names depending on their location or function. Furthermore, when described as being formed or placed on the “top or bottom” of each component, “top or bottom” includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as “top or bottom,” it may include the meaning of a downward direction as well as an upward direction relative to a single component. Hereinafter, an embodiment of a vehicle control system according to the present invention will be described in detail with reference to the accompanying drawings. In describing with reference to the accompanying drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. Technologies controlling various vehicle functions are being applied to improve vehicle stability and ride comfort. For optimized control, information regarding the road surface conditions on which the vehicle is operating is important. To collect information on the condition of the road surface, the vehicle may be equipped with a front camera that photographs the road surface, and ride comfort can be improved by recognizing the road surface through image information and