Automobile air suspension and backup brake integrated device

Abstract

The utility model discloses an automobile air suspension and backup brake integrated device which comprises an air suspension loop and an air backup brake loop which are connected in sequence. The air suspension loop and the air backup brake loop are connected through an air storage tank, and the air suspension loop and the air backup brake loop are connected through air pipelines. By the adoption of the structure, an existing air suspension is improved, the air suspension can achieve the functions of adjusting the height of an automobile and damping the automobile, the air storage unit of the air suspension of the automobile is combined, high-pressure air can be additionally provided, triggering is carried out through a brake pedal, and the air suspension can be used for adjusting the height of the automobile and damping the automobile. High-pressure gas is conveyed to the calipers through the gas pipeline, and reliable backup braking force is provided under the condition that conventional braking fails, so that vehicle collision caused by the conventional braking fails is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile braking, in particular to an integrated device of automobile air suspension and backup braking. Background Art

[0002] With the continuous development of automobile intelligence and electrification, consumers have higher and higher requirements for vehicle safety performance. The EMB system has a short response time and can effectively improve the braking performance and safety of the vehicle. The system can also realize redundancy. As an important part of autonomous driving technology, it will receive more and more attention and promotion. In the field of braking, the EMB braking system obviously has many advantages that traditional hydraulic braking systems cannot match. However, due to its short development time, there are also many problems that need to be solved urgently: the biggest difficulty is how to solve the failure problem of its electronic control component drive.

[0003] In order to meet the 0.24g deceleration requirement for emergency braking as required by regulations, the current EMB generally adopts a front wet and rear dry solution, that is, the front wheels of the vehicle retain the traditional hydraulic brake circuit, and the rear wheels use EMB brakes. This layout fails to completely get rid of the hydraulic brake circuit, and to achieve ABS, AEB and other braking control actions, it requires a more complex structure and control algorithm, which cannot fully bring out the advantages of EMB in intelligent driving. Utility Model Content

[0004] The purpose of the utility model is to provide an integrated device of automobile air suspension and backup brake, which uses high-pressure gas in the air suspension to form a second set of brake devices in the vehicle, and can provide reliable backup braking force when the electronically controlled hydraulic brake fails.

[0005] To achieve the above-mentioned purpose, the utility model provides an integrated device of automobile air suspension and backup brake, comprising an air suspension circuit and an air backup brake circuit connected in sequence; the air suspension circuit and the air backup brake circuit are connected through an air storage tank, and the air suspension circuit and the air backup brake circuit are both connected using gas pipelines.

[0006] Preferably, the air suspension circuit includes an air pumping structure, which includes a ventilation port, an air filter, and an air inlet of an air pump connected in sequence. The air pump is provided with an air outlet and a pressure relief port, and the pressure relief port is connected to the power limiting valve and the ventilation port in sequence. The air outlet of the air pump is divided into two branches, one branch is provided with an exhaust valve, and the other branch is connected to an air dryer and a throttling check valve in sequence. The output end of the throttling check valve is provided with three branches, the first branch is provided with a manual exhaust bolt, the second branch is connected to the input end of the switching valve four, and the third branch is connected to the input end of the switching valve one.

[0007] Preferably, the output end of the switching valve 1 is connected to a plurality of air spring groups, and the plurality of air spring groups are further connected to the switching valve 2, and the output end of the switching valve 2 is connected to the air inlet of the air pump.

[0008] Preferably, the air spring group includes a pressure sensor 1, a plurality of air springs and a plurality of air valves, the number of the air springs is the same as the number of the air valves, the pressure sensor 1 is arranged behind the output end of the switching valve 1, and an air valve is arranged in front of each of the air springs.

[0009] Preferably, the output end of the switching valve four is divided into two branches, one branch is connected to the switching valve three and the air inlet of the air pump in sequence; the other branch is connected to the air storage tank, pressure sensor two and the air backup brake circuit in sequence.

[0010] Preferably, the air backup brake circuit includes a brake valve and a plurality of calipers connected in sequence from the output end of the air storage tank.

[0011] Therefore, the utility model adopts an automobile air suspension and backup brake integrated device of the above structure, which has the following beneficial effects:

[0012] By modifying the basic air suspension structure, the air suspension can not only adjust the height of the car and reduce shock, but also provide high-pressure gas for backup braking when the conventional braking system fails, thereby improving the driving safety of the car and enhancing the safety and reliability of the vehicle, and the upgrade cost is low;

[0013] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of an embodiment of an integrated device for automobile air suspension and backup brake of the utility model;

[0015] Figure numerals: 1. Exhaust valve; 2. Air dryer; 3. Throttle check valve; 4. Air pump; 5. Power limiting valve; 6. Air filter; 7. Switching valve one; 8. Switching valve two; 9. Switching valve three; 10. Switching valve four; 11. Pressure sensor one; 12. Air valve; 13. Air spring; 14. Air tank; 15. Pressure sensor two; 16. Brake valve; 17. Caliper. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0017] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The specific connection methods of each part adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] Example

[0019] like Figure 1 As shown, the utility model provides an integrated device of automobile air suspension and backup brake, including an air suspension circuit and an air backup brake circuit connected in sequence; the air suspension circuit and the air backup brake circuit are connected through an air storage tank 14, the air storage tank 14 stores high-pressure gas for adjustment of an air spring 13 and provides a power source for emergency braking, and the air suspension circuit and the air backup brake circuit are both connected by gas pipelines for gas circulation.

[0020] The air suspension circuit includes a pumping structure, which includes a ventilation port, an air filter 6, and an air inlet of an air pump 4 connected in sequence. The air pump 4 is provided with an air outlet and a pressure relief port, and the pressure relief port is connected with a power limiting valve 5 and the ventilation port in sequence. The air filter 6 filters impurities in the air to prevent the inhalation of impurities from affecting the service life of subsequent equipment. The air pump 4 is provided with a pressure relief port, which can prevent the internal pressure from being too high and cause dangerous working conditions of the equipment through the power limiting valve 5;

[0021] The air outlet of the air pump 4 is divided into two branches. One branch has an exhaust valve 1, which controls exhaust and can adjust the pipeline pressure twice. The other branch is connected with an air dryer 2 and a throttle check valve 3 in sequence. The air dryer 2 removes moisture from the circuit to avoid moisture corrosion, and flows through the throttle check valve 3 for one-way flow into the air spring group. The output end of the throttle check valve 3 is provided with three branches. The first branch is provided with a manual exhaust bolt for pressure relief behind the throttle check valve 3. The second branch is connected with the input end of the switching valve four 10, and the third branch is connected with the input end of the switching valve one 7. The gas passes through the switching valve four 10 for the air backup brake circuit, and through the switching valve one 7 for the air spring group to adjust the height of the vehicle body.

[0022] The output end of the switching valve 1 7 is connected to several air spring groups, and the several air spring groups are also connected to the switching valve 2 8. The switching valve 2 8 is the venting port of the air spring group. The output end of the switching valve 2 8 is connected to the air inlet of the air pump 4. Through the switching valve 2 8, the excess gas is sent back to the air pump 4 for re-pressurization and filling.

[0023] The air spring group includes a pressure sensor 11, a plurality of air springs 13 and a plurality of air valves 12. The number of air springs 13 is the same as the number of air valves 12. The pressure sensor 11 is arranged behind the output end of the switching valve 7 to detect the pipeline pressure. An air valve 12 is arranged in front of each air spring 13, and a single air spring 13 is controlled by the air valve 12.

[0024] The output end of the switching valve four 10 is divided into two branches, one branch is connected to the switching valve three 9 and the air inlet of the air pump 4 in sequence; through the switching valve three 9, the gas can be sent back to the air pump 4 for re-pressurization, and the other branch is connected to the air tank 14, the pressure sensor two 15 and the air backup brake circuit in sequence. The pressure sensor two detects the pipeline pressure in the air backup brake circuit and keeps it within a safe range.

[0025] The air backup brake circuit includes a brake valve 16 and a plurality of calipers 17 connected in sequence from the output end of the air tank 14. The brake valve 16 does not work when the brake system is operating normally, and the brake valve 16 has its own backup battery. In an emergency, the battery powers the brake valve 16 to generate braking force. After receiving the input from the pedal, the brake valve 16 will transport the gas in the air tank 14 to the caliper 17 to generate braking force for backup braking.

[0026] In actual use, the device is started, the air pump inhales gas through the air filter, and after being inspected by the power limiting valve, it is input into the air spring to adjust the air suspension to a suitable height and hardness. Under the action of the switching valve 4, gas is poured into the air tank. The compressed gas in the air tank can adjust the air spring and is also used as a source of braking force when the vehicle's brake system fails. When the car is powered on normally, the brake pedal is not related to the brake valve. When the vehicle's electronic control brake system fails, the pedal will be linked to the brake valve. When the conventional brake system fails, the air suspension module can operate normally, and the backup brake system can continue to generate compressed gas under the action of the pump air unit to ensure stable braking force. If the air suspension module also fails in addition to the conventional brake system, the compressed gas stored in the air tank can still provide emergency braking force. After the driver steps on the pedal, the brake valve will also open, and the compressed gas in the air tank will flow to the brake caliper to achieve the effect of emergency braking.

[0027] Therefore, the utility model adopts an integrated device of automobile air suspension and backup brake of the above structure, which can not only realize the functions of air suspension for adjusting the height of the automobile and reducing the shock of the vehicle, but also provide an additional way for emergency braking in the event of brake system failure, which can significantly improve the driving safety of the automobile.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. An integrated device for automobile air suspension and backup brake, characterized in that: It comprises an air suspension circuit and an air backup brake circuit which are connected in sequence; the air suspension circuit and the air backup brake circuit are connected via an air storage tank, and the air suspension circuit and the air backup brake circuit are both connected via a gas pipeline.

2. The integrated device of automobile air suspension and backup brake according to claim 1, characterized in that: The air suspension circuit includes an air pumping structure, which includes a ventilation port, an air filter, and an air inlet of an air pump connected in sequence. The air pump is provided with an air outlet and a pressure relief port, and the pressure relief port is connected to the power limiting valve and the ventilation port in sequence. The air outlet of the air pump is divided into two branches, one branch is provided with an exhaust valve, and the other branch is connected to an air dryer and a throttling check valve in sequence. The output end of the throttling check valve is provided with three branches, the first branch is provided with a manual exhaust bolt, the second branch is connected to the input end of the switching valve four, and the third branch is connected to the input end of the switching valve one.

3. The integrated device of automobile air suspension and backup brake according to claim 2, characterized in that: The output end of the switching valve 1 is connected to a plurality of air spring groups, and the plurality of air spring groups are further connected to the switching valve 2, and the output end of the switching valve 2 is connected to the air inlet of the air pump.

4. The integrated device of automobile air suspension and backup brake according to claim 3 is characterized in that: The air spring group includes a pressure sensor 1, a plurality of air springs and a plurality of air valves. The number of the air springs is the same as the number of the air valves. The pressure sensor 1 is arranged behind the output end of the switching valve 1, and an air valve is arranged in front of each of the air springs.

5. The integrated device of automobile air suspension and backup brake according to claim 4 is characterized in that: The output end of the switching valve four is divided into two branches, one branch is connected to the switching valve three and the air inlet of the air pump in sequence; the other branch is connected to the air storage tank, the pressure sensor two and the air backup brake circuit in sequence.

6. The integrated device of automobile air suspension and backup brake according to claim 5, characterized in that: The air backup brake circuit includes a brake valve and a plurality of calipers connected in sequence from the output end of the air storage tank.

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