KR20130042324A - Method for controlling height of air suspension for vehicles - Google Patents

Method for controlling height of air suspension for vehicles Download PDF

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Publication number
KR20130042324A
KR20130042324A KR1020110106570A KR20110106570A KR20130042324A KR 20130042324 A KR20130042324 A KR 20130042324A KR 1020110106570 A KR1020110106570 A KR 1020110106570A KR 20110106570 A KR20110106570 A KR 20110106570A KR 20130042324 A KR20130042324 A KR 20130042324A
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KR
South Korea
Prior art keywords
garage
wheel
vehicle
air spring
pressure
Prior art date
Application number
KR1020110106570A
Other languages
Korean (ko)
Inventor
김병곤
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020110106570A priority Critical patent/KR20130042324A/en
Publication of KR20130042324A publication Critical patent/KR20130042324A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/018—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/052—Pneumatic spring characteristics
    • B60G17/0523—Regulating distributors or valves for pneumatic springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/25—Stroke; Height; Displacement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/50—Pressure
    • B60G2400/51—Pressure in suspension unit
    • B60G2400/512—Pressure in suspension unit in spring
    • B60G2400/5122—Fluid spring
    • B60G2400/51222—Pneumatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/306—Pressure sensors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

PURPOSE: A method for controlling the height of an air suspension for a vehicle is provided to maintain the stable drive of a vehicle by predicting and controlling a vehicle height using the pressure of an air suspension in the normal condition of a vehicle wheel. CONSTITUTION: A method for controlling the height of an air suspension for a vehicle comprises the following steps: predicting the pressure of an air spring and a vehicle height by vehicle wheels through a vehicle height sensor and a pressure sensor(S10); accumulating and storing the vehicle height and the air spring pressure(S20); determining the abnormal state of a vehicle sensor in the process of adjusting the vehicle height by controlling the air spring pressure(S30); measuring the air spring pressure of each wheel(S40); predicting the vehicle height of the abnormal wheel through the vehicle height sensor by using the air spring pressure of the normal wheel(S50); and accumulatively storing the vehicle height and air spring pressure of each wheel on the basis of the actual load of the vehicle. [Reference numerals] (AA) Start; (BB) End; (S10) Measuring the vehicle height and air spring pressure of each wheel; (S20) Accumulating and storing the measured vehicle heights and pressures; (S30) Vehicle height sensor is abnormal?; (S40) Measuring the air spring pressure of each wheel; (S50) Estimating the vehicle height of a wheel with an abnormal vehicle height sensor; (S60) Controlling the vehicle height according to the estimated vehicle height;

Description

Garage control method for vehicle air suspension {METHOD FOR CONTROLLING HEIGHT OF AIR SUSPENSION FOR VEHICLES}

The present invention relates to a garage control method of an air suspension for a vehicle, and more particularly, to a garage control method of a vehicle air suspension for estimating and controlling the garage by the pressure of the air spring when the garage sensor for measuring the garage is abnormal. .

In general, the air suspension (Air Suspension) detects the current garage for each wheel of the vehicle to perform the garage control.

The air suspension discharges air from the air spring to maintain a garage lower than the reference garage (0 mm) at high speeds based on the garage, and inflates the garage by injecting air into the air spring to maintain a high garage on the rough road.

When the garage control is performed from the current garage to the target garage, the intake or exhaust operation is periodically performed based on the garage measured by the garage sensor.If the current garage is within the allowable range of the target garage, the garage control operation after a certain time has elapsed. Stop.

Background art of the present invention is disclosed in Korean Patent Publication No. 10-1993-0011816 (1992.06.25).

In the conventional air suspension, if the garage sensor is abnormal, the garage control is stopped without reaching the target garage because an accurate garage cannot be obtained.

That is, when the height sensor is abnormal during front wheel / rear wheel and left / right garage control, it may be necessary to travel in a state where the front / rear or left / right garage deviations occur.

In this case, if the garage sensor output signal is abnormal, normal operation is possible in the same ignition cycle, and if the abnormal situation is released, the garage control can be performed immediately. Since it is possible to move the vehicle from the time when an abnormal situation occurs to a safe position, the ignition cycle must be performed again.

As a result, an abnormal situation of the garage sensor may occur, and driving conditions may occur in a situation in which the garage of the front / rear or the left / right side is twisted.

The present invention was devised to improve the above-mentioned problems, and if the garage sensor is abnormal, the vehicle is estimated using the pressure of the air suspension of the wheel in a normal state, and the garage is controlled based on the estimated garage to stabilize the behavior of the vehicle. It is an object of the present invention to provide a method for controlling the height of a vehicle air suspension to maintain the vehicle.

Garage control method of the vehicle air suspension according to an aspect of the present invention comprises the steps of measuring the pressure of the garage and the air spring for each wheel using a garage sensor and a pressure sensor; Accumulating and storing the measured pressure of each wheel and the air spring; And estimating a garage of the wheel in which the garage sensor is abnormal using the pressure of the air spring of the wheel in which the garage sensor is normal, if at least one of the garage sensors is abnormal.

The pressure of the garage and air spring for each wheel of the present invention is characterized in that the cumulative storage based on the actual load of the vehicle.

According to another aspect of the present invention, a vehicle height control method of a vehicle air suspension is configured to control the pressure of the air spring for each wheel so that the garage for each wheel becomes a target garage by using the measured pressure of the garage for each wheel and the air spring. step; Estimating a garage of the wheel in which the garage sensor is abnormal based on the pressure of the air spring for each wheel of the wheel in which the garage sensor is normal if at least one of the garage sensors is abnormal; And controlling, by the garage sensor, the pressure of the air spring of the wheel which is abnormal according to the estimated garage.

The method further includes measuring and accumulating and storing the pressures of the garage and the air spring for each wheel of the present invention.

The pressure of the garage and the air spring for each wheel of the present invention is characterized in that the cumulative storage based on the actual load of the vehicle.

According to the present invention, if the garage sensor is abnormal, the garage is estimated based on the pressure of the air spring to perform the garage control according to the estimated garage, thereby maintaining stable vehicle behavior.

1 is a block diagram of a vehicle garage control apparatus according to an embodiment of the present invention.
2 is a flowchart illustrating a vehicle control method according to an embodiment of the present invention.
3 is a timing diagram illustrating a garage control process according to an embodiment of the present invention.

Hereinafter, a garage control method of a vehicle air suspension according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

1 is a block diagram of a vehicle garage control apparatus according to an embodiment of the present invention.

Vehicle garage control apparatus according to an embodiment of the present invention is the garage sensor 10, the air spring 20, the pressure sensor 30, the valve 40, the compressor 50, the storage unit 70 and the control unit ( 60).

The air spring 20 is installed on each wheel of the vehicle to maintain a predetermined target garage suitable for the driving mode or the driving environment for each wheel.

The compressor 50 is connected to each of the air springs 20 installed on the wheels to generate compressed air by an electric motor (not shown) to supply air to each of the air springs 20.

The valve 40 is installed between the air spring 20 and the compressor 50 to regulate the pressure of the air spring 20 by intermittent the air supplied from the compressor 50 to each of the air springs 20.

The garage sensor 10 measures the height of each wheel and inputs it to the controller 60.

The pressure sensor 30 measures the pressure of the air spring 20 mounted on the valve 40 for each wheel and inputs the pressure to the controller 60.

The storage unit 70 stores the pressure of each of the wheels and the air spring 20 measured by the height sensor 10 and the pressure sensor 30 for each wheel.

The pressures of the garage and the air spring 20 for each wheel stored in the storage unit 70 reflect the actual load of the vehicle, and measure the change in pressure in the air spring 20 due to the load of the actual vehicle.

That is, the initialization operation of the garage sensor 10 in the production process is performed when there is no additional load except the vehicle specifications. However, after the vehicle is delivered to the consumer, the load changes according to the trunk or the load in the vehicle interior, the occupant and the position of the vehicle, and the like.

Therefore, the pressure required in the air spring 20 to maintain the target height for each driving mode (off road mode, normal mode, highway mode) may vary.

The controller 60 controls the valve 40 based on the pressure and the height of the air spring 20 measured according to the pressure sensor 30 and the garage sensor 10, and the pressure sensor 30 and The pressure and the garage of the air spring 20 measured by the garage sensor 10 are accumulated and stored in the storage unit 70.

In this process, when the specific garage sensor 10 is abnormal, the garage control to the target garage is temporarily stopped, and the pressure of the air spring 20 for each wheel is measured to measure the pressure of the air spring 20 for each wheel. Check the pressure.

In this case, the abnormal garage sensor 10 cannot measure a normal garage. Therefore, based on the relationship between the garage of the normal garage sensor 10 except the abnormal garage sensor 10 and the pressure of the air spring 20, the garage sensor 10 is estimated to estimate the garage of the abnormal wheel. Accordingly, the valve 40 is controlled to reach the target garage.

Hereinafter, a vehicle garage control method according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

2 is a flowchart illustrating a vehicle garage control method according to an embodiment of the present invention, and FIG. 3 is a timing diagram illustrating a garage control process according to an embodiment of the present invention.

First, as shown in FIG. 2, the height sensor 10 measures the height of each wheel, and the pressure sensor 30 measures the pressure of the air spring 20 of each wheel (S10).

When the height of the garage and the air spring 20 of each wheel measured by the garage sensor 10 and the pressure sensor 30 is input, the controller 60 controls the target garage for each wheel based on this.

Accordingly, as shown in FIG. 3, the pressure of the air spring 20 is controlled by controlling the air inside the air spring 20 through the valve 40 so that the garage reaches the target garage at the reference garage.

In this case, the controller 60 accumulates and stores the pressure of the garage and the air spring 20 of each wheel measured by the garage sensor 10 and the pressure sensor 30 in the storage unit 70 (S20).

As such, storing the garage of each wheel and the pressure of the air spring 20 in the storage unit 70 is repeatedly performed in the course of the normal operation of all the garage sensors 10 installed on each wheel. The garage of each wheel and the pressure of the air spring 20 may be stored in various ways based on the actual vehicle load.

For reference, the pressures of the garage and the air spring 20 stored in the storage unit 70 reflect the load of the actual vehicle, as described above, and are measured values of the pressure change in the air spring 20 of the actual vehicle.

On the other hand, the control unit 60 controls the height of the garage by controlling the pressure of the air spring 20 based on the pressure of the height of the garage and the air spring 20 of each wheel measured by the height sensor 10 and the pressure sensor 30 In operation S30, it is determined whether the garage sensor 10 is abnormal.

Here, the abnormality of the garage sensor 10 is not only a failure of the garage sensor 10 itself, but also the power supply of the garage sensor 10 is cut off or the garage sensor 10 does not operate normally such as an operation error. Will include all of them.

The controller 60 determines whether the garage sensor 10 is abnormal, and if the garage sensor 10 is abnormal, temporarily stops garage control using the valve 40.

In addition, by measuring the pressure of the air spring 20 for each wheel (S40), the pressure of the rest of the normal air spring 20 is based on the same or similar to the pressure of the currently measured air spring 20, the height sensor ( 10) to estimate the garage of the abnormal wheel (S50).

That is, the controller 60 estimates the garage of the wheel in which the garage sensor 10 is abnormal based on the pressure of the air spring 20 measured by the normal pressure sensor 30 except the wheel in which the garage sensor 10 is abnormal. Done.

In this case, the pressure of the air spring 20 measured by the pressure sensor 30 of the normal wheel is the pressure of the air spring 20 with respect to the garage, and the actual vehicle load is reflected.

When the garage sensor 10 estimates the garage of the abnormal wheel, the controller 60 controls the valve 40 of the abnormal wheel to control the air spring 20 based on the estimated garage. By adjusting the pressure of the target garage can be reached (S60).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Accordingly, the true scope of the present invention should be determined by the following claims.

10: garage sensor 20: air spring
30: pressure sensor 40: valve
50: compressor 60: control unit
70: storage

Claims (5)

Measuring the pressure of the garage and the air spring for each wheel by using the garage sensor and the pressure sensor;
Accumulating and storing the measured pressure of each wheel and the air spring; And
Estimating a height of a wheel of the vehicle that is abnormal in the garage sensor by using a pressure of an air spring of a wheel in which the height of the garage sensor is normal if at least one of the height sensors is abnormal. According to claim 1, wherein the pressure of the garage and the air spring for each wheel
Garage control method of the vehicle air suspension, characterized in that the cumulative storage based on the actual load of the vehicle. Controlling the pressure of the air spring for each wheel so that the garage for each wheel becomes a target garage by using the measured pressure of each wheel and the air spring;
Estimating a garage of the wheel in which the garage sensor is abnormal based on the pressure of the air spring for each wheel of the wheel in which the garage sensor is normal if at least one of the garage sensors is abnormal; And
And controlling the pressure of the air spring of the wheel in which the height sensor is abnormal according to the estimated height. 4. The method of claim 3, further comprising the step of measuring and accumulating and storing the pressures of the garage and the air spring for each wheel. The pressure of the garage for each wheel and the air spring is
Garage control method of the vehicle air suspension, characterized in that the cumulative storage based on the actual load of the vehicle.
KR1020110106570A 2011-10-18 2011-10-18 Method for controlling height of air suspension for vehicles KR20130042324A (en)

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KR1020110106570A KR20130042324A (en) 2011-10-18 2011-10-18 Method for controlling height of air suspension for vehicles

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Application Number Priority Date Filing Date Title
KR1020110106570A KR20130042324A (en) 2011-10-18 2011-10-18 Method for controlling height of air suspension for vehicles

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116674333A (en) * 2023-07-28 2023-09-01 成都赛力斯科技有限公司 Active suspension control method, device, computer equipment and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116674333A (en) * 2023-07-28 2023-09-01 成都赛力斯科技有限公司 Active suspension control method, device, computer equipment and storage medium
CN116674333B (en) * 2023-07-28 2023-09-29 成都赛力斯科技有限公司 Active suspension control method, device, computer equipment and storage medium

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