CN217319958U - Air supply system of air suspension - Google Patents

Abstract

The utility model discloses an air supply system of an air suspension, which comprises a compression pump assembly used for outputting high-pressure gas; one end of the finned radiating tube is communicated with a high-pressure gas output end of the compression pump assembly through a first pipeline, and the other end of the finned radiating tube is respectively communicated with the dryer through a second pipeline and a pressure limiting valve through a third pipeline; one end of the pressure limiting valve is communicated with the second pipeline through a fifth pipeline, a pneumatic control valve is installed on the fifth pipeline, the second pipeline is sequentially communicated with an air valve, the first switching valve and the second switching valve through a sixth pipeline, and the air valve is respectively communicated with the corresponding air springs; the second switching valve is communicated with the compression pump assembly through a seventh pipeline, and the pipeline is communicated with the gas storage tank through an eighth pipeline. The utility model discloses simple structure can realize safe pressure's adjustable, and can fill the gassing according to the motion state and the road surface situation of car, control air suspension air feed unit, realizes air suspension system regulatory function.

Description

Air supply system of air suspension

Technical Field

The utility model relates to a car air suspension field specifically is an air suspension's air supply system.

Background

The air suspension is used as an important part of an automobile active suspension system and mainly comprises an air supply unit, an air spring, a damping device, a transverse stabilizer, a height valve, a guide force transmission mechanism, an air storage tank and a pipeline, and the rigidity and the damping of the suspension can be adjusted in real time according to the motion state and the road surface condition of an automobile, so that the suspension system is in the optimal damping state, and the automobile has good comfort under various road surface conditions. With the requirement of people on the riding comfort of vehicles and the development of suspension technology, the air suspension is widely applied to large buses, trucks, special vehicles and high-grade small automobiles.

The air supply system is used as a core component of the air suspension system, air can be compressed and filled into the air spring, and source power is provided for realizing the functions of adjusting rigidity and damping of the air suspension. The distribution valve assembly in the air supply system needs to be capable of dynamically controlling air to enter and exit, adjusting the hardness degree and the length of the air spring, controlling the air supply unit of the air suspension to inflate and deflate, and achieving the adjustment function of the air suspension system.

SUMMERY OF THE UTILITY MODEL

The utility model provides an air suspension's air supply system, simple structure can realize safe pressure's adjustable, and can fill the gassing according to the motion state and the road surface situation of car, control air suspension air supply unit, realizes air suspension system regulatory function.

In order to achieve the above object, the utility model provides a following technical scheme: an air supply system of an air suspension comprises a compression pump assembly, a gas inlet pipe, a gas outlet pipe and a gas inlet pipe, wherein the compression pump assembly is used for outputting high-pressure gas; one end of the finned radiating tube is communicated with a high-pressure gas output end of the compression pump assembly through a first pipeline, the other end of the finned radiating tube is communicated with the dryer through a second pipeline and is communicated with a pressure limiting valve through a third pipeline, and the pressure limiting valve is also communicated with a gas inlet of the compression pump assembly through a fourth pipeline;

one end of the pressure limiting valve is communicated with a second pipeline through a fifth pipeline, a pneumatic control valve is installed on the fifth pipeline, the second pipeline is sequentially communicated with a first air valve, a second air valve, a third air valve, a fourth air valve, a first switching valve and a second switching valve through a sixth pipeline, and the first air valve, the second air valve, the third air valve and the fourth air valve are respectively communicated with a left front wheel air spring, a left rear wheel air spring, a right front wheel air spring and a right rear wheel air spring;

the second switching valve is communicated with the compression pump assembly through a seventh pipeline, and a pipeline between the first switching valve and the second switching valve is communicated with the gas storage tank through an eighth pipeline.

Preferably, the compression pump assembly comprises a two-stage pump, compression cavities are formed in two ends of the two-stage pump, compression pistons are arranged in the compression cavities and driven by a motor to move, the compression cavities at the two ends of the compression pump assembly are communicated through a ninth pipeline, and the eighth pipeline is communicated with the ninth pipeline.

Preferably, the air inlet of the compression pump assembly is communicated with the air filter through a tenth pipeline.

Preferably, pressure sensors are arranged in the left front wheel air spring, the left rear wheel air spring, the right front wheel air spring, the right rear wheel air spring and the air storage tank.

Preferably, a one-way throttle valve is further installed on the second pipeline.

Preferably, the device also comprises a tire inflation valve, and the tire inflation valve is arranged on the eleventh pipeline between the tire and the finned radiating pipe.

Preferably, a flow control valve is mounted on the third pipeline.

Compared with the prior art, the beneficial effects of the utility model are that:

the gas supply system has simple and clear lines, the number of used control valves is small, and the integration and miniaturization of a plurality of control valves can be realized; the control valve is provided with the ECU controlled in a unified manner, and can control the air supply unit of the air suspension to charge and discharge air according to the motion state and the road surface condition of the automobile, so that the adjustment function of the air suspension system is realized.

Drawings

FIG. 1 is a schematic diagram of a gas storage tank filling line of the present invention;

FIG. 2 is a schematic diagram of the circuit of the air storage tank of the present invention when not in operation and the compression pump pressurizing the air spring;

FIG. 3 is a schematic diagram of an air spring pressure relief mode circuit according to the present invention;

fig. 4 is a schematic circuit diagram of the air storage tank directly filling the empty reed when the compression pump of the present invention is not in operation;

FIG. 5 is a schematic diagram of the fast voltage build-up mode circuit of the present invention;

fig. 6 is a schematic diagram of the circuit with the inflation function according to the present invention.

Reference numerals:

PA, a compression pump assembly, FRT, a finned heat radiation pipe, A3, a first pipeline, B1, a second pipeline, B2, a third pipeline DA, a dryer, ASV, a pressure limiting valve, C2, a fourth pipeline, P, an air inlet, C1, a fifth pipeline, ACV, a pneumatic control valve, D1, a sixth pipeline, AV1, a first air valve, AV2, a second air valve, AV3, a third air valve, AV4, a fourth air valve, SV-2, a first switching valve, SV-1, a second switching valve, LF-S, a left front wheel air spring, LR-S, a left rear wheel air spring, FR-S, a right front wheel air spring, RR-S, a right rear wheel air spring, D3, a seventh pipeline, C3, an eighth pipeline, AT, an air storage tank, A2, a ninth pipeline, A1, a tenth pipeline, AC, an air filter, CA, a one-way throttle valve, IV, a tire 4, an eleventh pipeline, FV, flow control valve.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1-6, the utility model discloses a scheme is in order to solve among the current gas supply system that safe pressure is unadjustable, and the gas circuit blocks up easily and leads to the too high and too complicated problem of gas supply system of pressure, provides following technical scheme: an air supply system of an air suspension comprises a compression pump assembly PA, a pressure sensor and a controller, wherein the compression pump assembly PA is used for outputting high-pressure air; one end of the finned heat radiation pipe FRT is communicated with a high-pressure gas output end of the compression pump assembly PA through a first pipeline A3, the other end of the finned heat radiation pipe FRT is respectively communicated with the dryer DA through a second pipeline B1 and communicated with a pressure limiting valve ASV through a third pipeline B2, and the pressure limiting valve ASV is also communicated with a gas inlet P of the compression pump assembly PA through a fourth pipeline C2;

one end of the pressure limiting valve ASV is communicated with a second pipeline B1 through a fifth pipeline C1, a pneumatic control valve ACV is installed on the fifth pipeline C1, the second pipeline B1 is sequentially communicated with a first air valve AV1, a second air valve AV2, a third air valve AV3, a fourth air valve AV4, a first switching valve SV-2 and a second switching valve SV-1 through a sixth pipeline D1, and the first air valve AV1, the second air valve AV2, the third air valve AV3 and the fourth air valve AV4 are respectively communicated with a left front wheel air spring LF-S, a left rear wheel air spring LR-S, a right front wheel air spring FR-S and a right rear wheel air spring RR-S;

the second switching valve SV-1 is communicated with the compression pump assembly PA through a seventh pipeline D3, and a pipeline between the first switching valve SV-2 and the second switching valve SV-1 is communicated with an air storage tank AT through an eighth pipeline C3.

Specifically, in the inflation mode: when the vehicle speed is higher than 30km/h, the air supply unit motor of the air suspension operates, the system is firstly communicated with a first switching valve SV-2, then communicated with a compression pump assembly PA and an air storage tank AT, air enters the compression pump assembly PA from an air inlet P, passes through a fin radiating tube FRT through a first pipeline A3, passes through a dryer DA through a second pipeline B1, passes through a first switching valve SV-2 through a sixth pipeline D1, and finally enters the air storage tank AT through an eighth pipeline C3 to fill the air storage tank AT; when the pressure of the air storage tank AT is AT least higher than the pressure in the air spring to be regulated by a certain value, the motor does not operate, and the air spring is directly pressurized by the air storage tank AT.

Raising the vehicle body: the first switching valve SV-2, the first air valve AV1, the second air valve AV2, the third air valve AV3 and the fourth air valve AV4 are powered on, compressed gas in the gas storage tank AT passes through the eighth pipeline C3, the first switching valve SV-2 and finally the first air valve AV1, the second air valve AV2, the third air valve AV3 and the fourth air valve AV4 to pressurize each air spring, the vehicle body is lifted, and the gas storage tank AT is preferentially used in the adjusting process during the periods of vehicle standstill and low-speed driving so as to improve the vehicle acoustic system; when gas holder AT pressure is less than a definite value, not switch on gas holder AT, the motor operation: the first air valve AV1, the second air valve AV2, the third air valve AV3 and the fourth air valve AV4 are electrified, air enters the compression pump assembly PA from the air inlet P, enters the fin-shaped radiating pipe FRT through the tenth pipeline A1, the ninth pipeline A2 and the first pipeline A3, passes through the second pipeline B1, passes through the drier DA, and pressurizes the air springs through the sixth pipeline D1, the first air valve AV1, the second air valve AV2, the third air valve AV3 and the fourth air valve AV4, so that the vehicle body is lifted.

A quick start mode: when pressure is required to be quickly established, the air storage tank AT is switched on, and the motor operates: the second switching valve SV-1, the first air valve AV1, the second air valve AV2, the third air valve AV3 and the fourth air valve AV4 are powered on, compressed air in the air storage tank AT is guided into the second-stage compression cavity through the eighth pipeline C3, the second switching valve SV-1, the seventh pipeline D3 and the ninth pipeline A2, then the air spring is pressurized through the first pipeline A3, the finned heat dissipation pipe FRT, the second pipeline B1, the dryer DA, the sixth pipeline D1, the first air valve AV1, the second air valve AV2, the third air valve AV3 and the fourth air valve AV4, the vehicle body rises, and the pressure can be quickly established in the mode when necessary.

An air release mode: the pneumatic control valve ACV, the first air valve AV1, the second air valve AV2, the third air valve AV3 and the fourth air valve AV4 are electrified, air in the air spring passes through the first air valve AV1, the second air valve AV2, the third air valve AV3 and the fourth air valve AV4, passes through the dryer DA through the sixth pipeline D1, passes through the second pipeline B1 and the third pipeline B2, passes through the flow control valve FV and the pressure limiting valve ASV, and is finally discharged through the fourth pipeline C2, and the vehicle body is lowered. The gas passes through a sixth pipeline D1 and a fifth pipeline C1 through a pneumatic control valve ACV, pressure is applied to a control interface of the pressure limiting valve ASV, the pressure limiting valve ASV is switched to an opening position, the set safe pressure of the pressure limiting valve ASV is adjustable in multiple stages, the phenomenon that the pressure is too high due to gas path blockage can be effectively avoided, the flow control valve FV can achieve multi-stage adjustment in the exhaust stage, and the driving feeling is improved.

In this embodiment, the compression pump assembly PA may adopt a two-stage pump, and both ends thereof are provided with compression cavities, and compression pistons are disposed in the compression cavities, and the compression pistons are driven by a motor to move, and the compression cavities at both ends of the compression pump assembly PA are communicated with each other through a ninth pipeline a2, and an eighth pipeline C3 is communicated with a ninth pipeline a 2.

Specifically, the compression pump assembly PA comprises a motor and a two-stage compression pump, and is arranged at one end of the motor, and a main shaft of the motor is inserted into the two-stage compression pump; the two-stage compression pump is internally provided with an operation inner cavity, a first cavity and a second cavity which are respectively arranged at two sides of the operation inner cavity, two ends of the operation inner cavity are respectively provided with a first compression cavity and a second compression cavity, a first piston is movably arranged in the first compression cavity, a second piston is arranged in the second compression cavity, and the first piston and the second piston are driven by a main shaft of a motor to axially move in the same direction; first compression chamber and second compression chamber be linked together with first cavity through first check valve and second check valve respectively, second cavity be linked together with the second compression chamber, the two-stage compression pump on install the gas vent that is linked together with the second cavity, the gas vent on be connected with the exhaust cooling tube, the compression pump body on still install the second grade air inlet that first cavity is linked together.

The motor is used as an output power source, an eccentric wheel can be installed on a main shaft of the motor, the motor is used as a specific embodiment for driving a first piston and a second piston to move, one end of the second piston is inserted into one end of the first piston, one end of the second piston inserted into the first piston is connected with the eccentric wheel, one end of the first piston is connected with the second piston through a rotating pin, when the eccentric wheel rotates, the second piston is pushed to swing and move axially, the first piston is driven to move axially while the second piston swings and moves axially, in the practical application process, the end surface area of the first piston is larger than that of the second piston, the compression effect of first-stage compression is better than that of second-stage compression, leather cups are installed on the end surfaces of the first piston and the second piston, and are in contact with the side walls of a first compression cavity and a second compression cavity and are sealed, the leather cup is compressed tightly fixedly by the support ring, all installs the bearing between eccentric wheel and second piston, wherein all cup jointed wear ring between rotational pin and first piston and the second piston, improves the life of rotational pin, noise reduction moreover.

When in use, as the first piston retreats in the first compression chamber, low-pressure air is sucked in the first compression chamber, the first piston then advances in the first compression chamber, compressing the gas in the first compression chamber and through the first one-way valve into the first chamber, at the same time, because the second piston in the second compression cavity retreats, the air flow which is subjected to first-stage compression in the first cavity is sucked into the second compression cavity, then a second piston in the second compression cavity advances to compress and extrude the gas in the second compression cavity to a second chamber, the gas entering the second chamber is high-pressure gas, and can install the fourth check valve between second compression chamber and the second chamber, the high-pressure gas who enters into the second chamber passes through the gas vent again and discharges into the exhaust cooling tube, inputs the air supply system in, the exhaust cooling tube can cool down high-pressure gas.

To filter the air entering the compressor pump assembly PA, the air inlet P of said compressor pump assembly PA communicates with the air filter AC via a tenth line a 1.

Meanwhile, pressure sensors are arranged in the left front wheel air spring LF-S, the left rear wheel air spring LR-S, the right front wheel air spring FR-S, the right rear wheel air spring RR-S and the air storage tank AT, and the pressure sensors can collect and record pressure values and temperatures of compressed air in the air springs and the air storage tank.

The second pipeline B1 is also provided with a one-way throttle valve CA which can reduce the flow rate of the air flow during air bleeding.

In this embodiment, still include tire inflation valve IV, tire inflation valve IV set up on eleventh pipeline A4 between tire and fin cooling tube FRT, increase the tire inflation function, directly aerify convenient practicality for the undervoltage tire through compression pump assembly PA.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless expressly specified otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "secured" are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Claims (7)

1. An air supply system for an air suspension, comprising:

a compressor Pump Assembly (PA) for outputting high pressure gas;

one end of the finned heat radiation pipe (FRT) is communicated with a high-pressure gas output end of the compression Pump Assembly (PA) through a first pipeline (A3), the other end of the finned heat radiation pipe (FRT) is respectively communicated with a Dryer (DA) through a second pipeline (B1) and a pressure limiting valve (ASV) through a third pipeline (B2), and the pressure limiting valve (ASV) is also communicated with a gas inlet (P) of the compression Pump Assembly (PA) through a fourth pipeline (C2);

one end of the pressure limiting valve (ASV) is communicated with a second pipeline (B1) through a fifth pipeline (C1), a pneumatic control valve (ACV) is installed on the fifth pipeline (C1), the second pipeline (B1) is sequentially communicated with a first air valve (AV1), a second air valve (AV2), a third air valve (AV3), a fourth air valve (AV4), a first switching valve (SV-2) and a second switching valve (SV-1) through a sixth pipeline (D1), and the first air valve (AV1), the second air valve (AV2), the third air valve (AV3) and the fourth air valve (AV4) are respectively communicated with a left front wheel air spring (LF-S), a left rear wheel air spring (LR-S), a right front wheel air spring (FR-S) and a right rear wheel air spring (RR-S);

the second switching valve (SV-1) is communicated with the compression Pump Assembly (PA) through a seventh pipeline (D3), and a pipeline between the first switching valve (SV-2) and the second switching valve (SV-1) is communicated with an air storage tank (AT) through an eighth pipeline (C3).

2. The air supply system for an air suspension according to claim 1, wherein: the compression Pump Assembly (PA) comprises two stages of pumps, compression cavities are formed in two ends of the two stages of pumps, compression pistons are arranged in the compression cavities and driven by a motor to move, the compression cavities at two ends of the compression Pump Assembly (PA) are communicated with each other through a ninth pipeline (A2), and an eighth pipeline (C3) is communicated with a ninth pipeline (A2).

3. The air supply system for an air suspension according to claim 1, wherein: the air inlet (P) of the compression Pump Assembly (PA) is communicated with the air filter (AC) through a tenth pipeline (A1).

4. The air supply system for an air suspension according to claim 1, wherein: and pressure sensors are arranged in the left front wheel air spring (LF-S), the left rear wheel air spring (LR-S), the right front wheel air spring (FR-S), the right rear wheel air spring (RR-S) and the air storage tank (AT).

5. The air supply system for an air suspension according to claim 1, wherein: and a one-way throttle valve (CA) is also arranged on the second pipeline (B1).

6. The air supply system for an air suspension according to claim 1, wherein: the heat radiating fin type air conditioner also comprises a tire Inflation Valve (IV), wherein the tire Inflation Valve (IV) is arranged on an eleventh pipeline (A4) between a tire and the fin heat radiating pipe (FRT).

7. The air supply system for an air suspension according to claim 1, wherein: and a flow control valve (FV) is mounted on the third pipeline (B2).

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