KR20140048769A - Mechanical 3 step height control apparatus for air-suspension of vehicle - Google Patents

Mechanical 3 step height control apparatus for air-suspension of vehicle Download PDF

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Publication number
KR20140048769A
KR20140048769A KR1020120115090A KR20120115090A KR20140048769A KR 20140048769 A KR20140048769 A KR 20140048769A KR 1020120115090 A KR1020120115090 A KR 1020120115090A KR 20120115090 A KR20120115090 A KR 20120115090A KR 20140048769 A KR20140048769 A KR 20140048769A
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KR
South Korea
Prior art keywords
air
vehicle
magnetic valve
valve
mechanical
Prior art date
Application number
KR1020120115090A
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Korean (ko)
Inventor
김태형
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현대자동차주식회사
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Priority to KR1020120115090A priority Critical patent/KR20140048769A/en
Publication of KR20140048769A publication Critical patent/KR20140048769A/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
    • B60G17/016—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 their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
    • B60G17/0165—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 their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
    • 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
    • B60G17/0525—Height adjusting or levelling valves
    • 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
    • B60G17/056—Regulating distributors or valves for hydropneumatic systems
    • B60G17/0565—Height adjusting valves
    • 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
    • B60G2400/80—Exterior conditions
    • B60G2400/82—Ground surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00—Indexing codes relating to the regulated action or device
    • B60G2500/20—Spring action or springs
    • B60G2500/202—Height or leveling valve for air-springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00—Indexing codes relating to the regulated action or device
    • B60G2500/30—Height or ground clearance

Abstract

The present invention performs the upper or lowering function by changing the reference value of the air spring design ride height through the signal of the on-off magnetic valve, thereby preventing the front and rear bumpers from hitting the ground when going downhill or passing a deep pool. It is an object of the present invention to provide a mechanical three-stage height control device for a vehicle air suspension that can prevent costs and reduce costs such as material costs by deleting components such as valve blocks and ECUs.

Figure P1020120115090

Description

Mechanical 3 step height control apparatus for air-suspension of vehicle

The present invention relates to a mechanical three-stage height adjustment device for a vehicle air suspension that can prevent the interference of the front / rear bumpers by adjusting the height on the downhill while driving.

In general, the suspension of the vehicle is connected to the axle, so that the vibration or shock received from the road surface is not directly transmitted to the vehicle body while driving the vehicle so as not to damage the vehicle body, passengers, cargo, etc., and the ride comfort of the vehicle. It is a device that makes good.

In particular, the large bus is provided with an air suspension device using an air spring as one of the suspension devices, and keeps the same posture regardless of the load of the vehicle.

However, there is a problem in that interference between the front / rear bumper and the ground occurs when descending a hill while driving a vehicle in a field or passing a deep hole.

To this end, an electronic control air suspension device (hereinafter referred to as ECAS) having a height adjustment function using an air spring is used.

1 is a block diagram schematically showing the configuration of the ECAS according to the prior art, wherein the electronically controlled air suspension device is mounted on the front axle and one level sensor for measuring the height of the garage and 1 for adjusting the height of the garage by entering and exiting the air. It consists of two valve blocks, two level sensors mounted on the rear axle, one valve block, and an ECU that controls the operation of the valve block.

The level sensor measures the height using the height of the air spring, the ECU may control the attitude of the vehicle by controlling the valve block by receiving a signal sensed from the level sensor to control the valve block.

However, the current ECAS device has a problem that the cost is excessively increased due to the high cost of parts such as a valve block and an ECU for the height adjustment function.

The present invention has been invented to solve the above problems, by changing the reference value of the air spring design ride height through the signal of the on-off magnetic valve to perform the upper or lowering function, to go downhill while driving It is possible to prevent the front and rear bumpers from hitting the ground as they pass through deep pools, as well as the mechanical three-level garage control system for vehicle air suspension that can reduce the cost of materials by eliminating existing valve blocks and ECUs. The purpose is to provide.

In order to achieve the above object, the mechanical three-stage height adjustment device for a vehicle air suspension according to the present invention performs a suspension function using an air spring,

An air tank in which air is stored; An on-off magnetic valve generating a control signal; And

Receiving a control signal from the on-off magnetic valve to open and close, and delivers the air of the air tank to the air spring to perform the upper or lowering function; including a two-stage control leveling valve; It is characterized in that it is possible to prevent the occurrence of interference between the front and rear bumpers and the ground when passing through the pool.

In addition, a 3 / 2-way magnetic valve is installed between the two-stage control leveling valve and the air spring, and the 3 / 2-way magnetic valve discharges air from the air spring to the atmosphere to further secure a kneeling function. It is characterized by being able to.

Referring to the advantages of the mechanical three-stage height adjustment device for a vehicle air suspension according to the present invention.

First, two-stage adjustable leveling valves are applied to the front and rear wheels of the vehicle, and the upper and lowering functions are independently performed by changing the air spring design ride height reference value through the signal of the on-off magnetic valve. By doing so, it is possible to prevent the occurrence of interference between the front and rear bumpers and the ground when the vehicle descends downhill or passes through a deep puddle.

In addition, by applying a 3 / 2-way magnetic valve to the front wheels and controlling the air access of the front wheel air springs to lower the front part of the body when a person with a disability rides, the handicapped person can safely ride the wheelchair through the hatch foot of the vehicle entrance. You can board.

1 is a block diagram schematically showing the configuration of an ECAS according to the prior art.
2 and 3 are schematic views of a mechanical three-stage height adjustment device for a vehicle air suspension according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

2 and 3 are schematic views of a mechanical three-stage height adjustment device for a vehicle air suspension according to an embodiment of the present invention.

Mechanical three-stage height adjustment device of the vehicle air suspension according to the present invention is a vehicle air suspension that can reduce the material cost and cost by eliminating the existing valve block and ECU in the air suspension device that can adjust the height by using the air pressure It relates to a mechanical three-stage height adjustment device.

The mechanical three-stage height adjusting device of the vehicle air suspension is an air tank 10 in which air is stored, an on / off magnetic valve 11 generating a control signal, and operated by receiving a control signal to enter and exit the air into the air spring 14. It includes a two-stage control leveling valve 12 for opening and closing a 3 / 2-way magnetic valve connected to the front wheel side and performing a kneeling function through on and off.

The air tank 10 may store air therein to generate air pressure, and may absorb and cushion the vibration or shock received from the road surface with air while driving the vehicle so as not to be directly transmitted to the vehicle body.

The on-off magnetic valve 11 is a kind of control valve for generating a control signal. When the on-off magnetic valve 11 is turned off, the on-off magnetic valve 11 is made to be in the same state as the air spring 14 at the time of normal or return, and the on-off magnetic When the valve 11 is turned on, the valve 11 is operated in an uppering or lowering operation or in a niling state.

When the on-off magnetic valve 11 is off, it is the same as a general air suspension and keeps the same posture at all times regardless of the vehicle load.

In addition, when the on-off magnetic valve 11 is on, it is possible to perform a function of raising or lowering the garage.

In addition, when the on-off magnetic valve 11 is turned on and the 3 / 2-way magnetic valve 13 is turned on, the niling function can be performed.

Of course, when the 3 / 2-way magnetic valve is off it can only perform the function of raising or lowering the garage.

The two-stage control leveling valve 12 is a two-stage adjustable leveling valve 12 that is capable of adjusting the height in two stages by receiving a signal from the on-off magnetic valve 11 without a conventional valve block and an ECU.

Air spring 14 is installed one by one for each wheel of the vehicle, the same as the existing components will be omitted detailed description.

Referring to the operating state of the height adjustment device of the vehicle air suspension according to the present invention by such a configuration as follows.

For example, when driving on a road surface that is not normally curved, the on-off magnetic valve 11 is turned off, and the two-stage control leveling valve 12 is in a closed state, and has already set a height (primary design ride height). Keep the car running.

When driving down a hill or passing a deep puddle, the on-off magnetic valve 11 is turned on by receiving a detection signal from a level sensor.

When the on-off magnetic valve 11 is turned on, the reference value of the air spring design ride height is changed from the primary design ride height to the secondary design ride height.

The air spring design ride height is divided into a primary design ride height and a secondary design ride height, and the secondary design ride height is higher or lower than the primary design ride height.

Here, the first design ride height refers to the height of the vehicle that is set during normal and return, and the second design ride height refers to the change of the garage due to the movement of the center of gravity of the vehicle when descending a hill or passing a deep puddle while driving the vehicle. The height of the vehicle reset to compensate.

That is, the ride height of the second digit is to lower the height of the lower body of the lower body when the height is higher than the normal garage when going down the hill or through a deep pool, and the lower height of the lower body of the body when the height is lower than the normal garage.

The two-stage control valve is opened through the signal of the on-off magnetic valve 11, and air to the air tank is introduced into the air spring 14 through the 3 / 2-way magnetic valve 13 from the two-stage control valve. As a result, the height of the air spring design ride is changed from the height of the first design ride to the height of the second design ride, thereby raising the height of the air spring 14 of the front wheel lowered by moving the center of gravity of the vehicle downward. It can prevent interference with the ground.

At this time, the first flow path connecting the two-stage control leveling valve 12 and the air spring 14 in the 3 / 2-way magnetic valve 13 is opened, and the second flow path discharged from the air spring 14 to the atmosphere. Becomes closed.

In addition, the low-floor bus lowers the front of the vehicle body in order to make the slope of the hatchway as smooth as possible when a disabled person is in a wheelchair. This is commonly referred to as kneeling.

When the front and the front of the vehicle body are lowered, the on-off magnetic valve 11 is turned on and the 3 / 2-way magnetic valve 13 is a first connecting the second stage leveling valve 12 and the air spring 14. By blocking the flow path and opening the second flow path connecting the air spring 14 and the atmosphere, the air is discharged from the air spring 14 of the front wheel to the atmosphere to lower the doors of the hatch in the state where the front of the vehicle is lowered, and the like. Allow yourself to ride safely in this wheelchair alone.

Accordingly, according to the present invention, a two-stage control leveling valve 12 that is adjustable in two stages is applied to the front wheel and the rear wheel of the vehicle, and the air spring design ride height reference value is changed through the signal of the on-off magnetic valve 11, thereby improving the upper. By performing the ring or lowering function alone, it is possible to prevent the occurrence of interference between the front and rear bumpers and the ground when going downhill or passing a deep puddle.

In addition, by applying a 3 / 2-way magnetic valve 13 to the front wheels and controlling the air entry and exit of the front wheel air spring (14a) by lowering the front part of the vehicle body when a person with a disability boarding (kneeling), it is possible You can ride safely in a wheelchair.

10: air tank
11: on-off magnetic valve
12: two stage control leveling valve
13: 3/2 way magnetic valve
14: air spring
14a: front wheel air spring
14b: Rear air spring
15: T connector

Claims (2)

In the mechanical three-stage height adjustment device for a vehicle air suspension that performs a suspension function using the air spring (14),
An air tank 10 in which air is stored;
An on / off magnetic valve 11 for generating a control signal; And
A two-stage control leveling valve (12) which receives the control signal from the on / off magnetic valve (11) and opens and closes and delivers air from the air tank (10) to the air spring (14) to perform an uppering or lowering function;
Including, the mechanical three-stage height adjustment device for a vehicle air suspension characterized in that it is possible to prevent the occurrence of interference between the front and rear bumpers and the ground when going downhill or passing through a deep pool.
The method according to claim 1,
A 3/2 way magnetic valve 13 is installed between the two-stage control leveling valve 12 and the air spring 14 so that the 3/2 way magnetic valve 13 waits for air from the air spring 14. Mechanical three-stage height adjustment device of the air suspension for a vehicle, characterized in that it can be discharged to the kneeling (Kneeling) function.
KR1020120115090A 2012-10-16 2012-10-16 Mechanical 3 step height control apparatus for air-suspension of vehicle KR20140048769A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120115090A KR20140048769A (en) 2012-10-16 2012-10-16 Mechanical 3 step height control apparatus for air-suspension of vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120115090A KR20140048769A (en) 2012-10-16 2012-10-16 Mechanical 3 step height control apparatus for air-suspension of vehicle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170051594A (en) * 2015-10-29 2017-05-12 현대자동차주식회사 Method for electronic controlling suspension device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170051594A (en) * 2015-10-29 2017-05-12 현대자동차주식회사 Method for electronic controlling suspension device

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