Automobile brake auxiliary system

Abstract

The invention discloses an automobile brake auxiliary system which is provided with a high-pressure air storage tank fixed on an automobile, an air outlet of the high-pressure air storage tank is provided with an electric valve, an outlet of the electric valve is connected with an input port of a distribution valve through a pipeline, and an output port of the distribution valve is connected with a front-end air nozzle through a pipeline. The number of the front-end air nozzles is 2-5, the front-end air nozzles are fixed to the front portion of an automobile frame side by side, and the air spraying direction faces the front portion of an automobile. A forward injection method which is the same as the advancing direction of the automobile is adopted, recoil force of high-speed injection is utilized, the speed of the automobile is rapidly reduced, an automobile braking system is assisted in rapid braking, and the braking distance is reduced, so that the major accident rate on a road is reduced, and property loss and life health damage of the country and the masses are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile braking. Background Art

[0002] Cars play a very important role in our daily lives. A large number of cars are running on various city roads and highways. The number of traffic accidents caused by so many cars every year is also alarming.

[0003] Most car accidents are related to braking. Nowadays, car brakes use brake pads to force the wheels to stop rotating, and use the sliding friction between the tires and the ground to reduce the speed of the car in order to stop the car.

[0004] For example, the public document with publication number CN 109532798A, publication date 2019-03-29, and patent name "Automobile Braking Control System, Automobile Braking System, Automobile and Automobile Braking Method" discloses an automobile braking control system, automobile braking system, automobile and automobile braking method, wherein the automobile braking control system includes a signal acquisition device for collecting automobile running state parameters, the signal acquisition device includes an automobile wheel rotation speed acquisition device, and the automobile wheel rotation speed acquisition device is used to monitor the rotation speed of the wheels when the automobile is driving. The automobile braking system includes the automobile braking control system, the automobile includes the automobile braking system, and the braking method depends on the control system or the braking system.

[0005] Such conventional braking distance is tens of meters, especially in rainy days when the road is slippery or the ground is sandy, the sliding friction decreases rapidly, resulting in poor braking effect, often causing collisions, rollovers and accidents of running off the road. Summary of the invention

[0006] The technical problem to be solved by the present invention is to realize an additional braking system to help the vehicle provide additional braking force when an accident occurs, thereby improving the braking effect of the vehicle.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an automobile brake assist system, the system is provided with a high-pressure gas tank fixed on the automobile, the air outlet of the high-pressure gas tank is provided with an electric valve, the outlet of the electric valve is connected to the input port of the distribution valve through a pipeline, the output port of the distribution valve is connected to the front-end air nozzle through a pipeline, the front-end air nozzle is provided with 2-5, the front-end air nozzle is fixed side by side on the front part of the automobile frame, and the air jet direction is toward the front of the automobile.

[0008] The spray direction of the front nozzle is toward the front of the vehicle and deviates 5-10 degrees downward.

[0009] Two right-side air jet nozzles for jetting air to the right side of the car are fixed on the right side of the car frame, and two left-side air jet nozzles for jetting air to the left side of the car are fixed on the left side of the car frame. One of the two right-side air jet nozzles and the left-side air jet nozzles is fixed at the front of the car, and the other is fixed at the rear of the car. The right-side air jet nozzle and the left-side air jet nozzle are connected to different output ports of the distribution valve through pipelines.

[0010] The gas outlet of the high-pressure gas storage tank is provided with a three-way connection, one output is connected to an electric valve, and the other output is connected to a manual inflation valve, and the manual inflation valve is used to inject high-pressure gas into the high-pressure gas storage tank.

[0011] The high-pressure gas storage tank is a columnar structure, and a groove extending forward and backward is provided at the center axis position of the automobile chassis, and the high-pressure gas storage tank is fixed in the groove.

[0012] The groove is made of metal, the bottom surface of the groove is sealed by a strip-shaped plastic plate, and the groove and the plastic plate form a cavity for storing the high-pressure gas storage tank.

[0013] The system is provided with an auxiliary brake controller, which is connected to and outputs control signals to the electric valve and the distribution valve, and is connected to the body controller to obtain body status information.

[0014] The air outlet of the high-pressure air storage tank is provided with an air pressure sensor, and the air pressure sensor is connected to and outputs an air pressure signal to the auxiliary brake controller.

[0015] The vehicle body controller monitors the vehicle state in real time. When the vehicle reaches a condition requiring auxiliary braking, the vehicle body controller sends an auxiliary braking instruction to the auxiliary braking controller, and the auxiliary braking controller sends an execution signal to the electric valve and the distribution valve.

[0016] When the vehicle's braking force is insufficient, open all front air jets;

[0017] When the car slides to the left, open all the left air nozzles;

[0018] When the car slides to the right, open all the right air nozzles;

[0019] When the car loses control and the front of the car deviates to the right, open the left side air nozzle at the left rear and the left front air nozzle;

[0020] When the car loses control and the front of the car deviates to the left, open the right rear right side air nozzle and the right front side air nozzle;

[0021] When executing the auxiliary braking command, if the auxiliary braking conditions are overcome, the electric valve and the distribution valve are closed.

[0022] The present invention adopts the method of forward injection in the same direction as the vehicle's travel, and utilizes the recoil force of high-speed injection to quickly reduce the speed of the vehicle, assist the vehicle's braking system in rapid braking, and reduce the braking distance, so as to reduce the rate of major accidents on the road and reduce the property losses and damage to life and health of the country and the people. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following is a brief description of the contents expressed in each figure in the specification of the present invention and the marks in the figure:

[0024] Figure 1 This is the principle block diagram of the automobile brake assist system;

[0025] The markings in the above figures are: 1. High-pressure gas tank; 2. Manual inflation valve; 3. Electric valve; 4. Distribution valve; 5. Left-side jet nozzle; 6. Right-side jet nozzle; 7. Front-end jet nozzle; 8. Auxiliary brake controller; 9. Body controller. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation methods of the present invention, such as the shape, structure, relative position and connection relationship between the various components involved, the function and working principle of each part, the manufacturing process and operation method, etc., through the description of the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0027] The automobile brake assist system requires a high-pressure gas tank 1 to be installed in the automobile. By spraying high-pressure gas, a reaction force is generated to achieve the purpose of auxiliary braking and auxiliary vehicle body stability control. The high-pressure gas tank 1 preferably adopts a slender cylindrical tank. The cylindrical structure is more pressure-resistant and the manufacturing process is more mature and reliable. Therefore, the space layout in the automobile is limited. It can be arranged at the bottom of the automobile and stored in the space of the automobile's four-wheel drive transmission shaft. Therefore, the automobile storing the high-pressure gas tank 1 cannot be equipped with a four-wheel drive system.

[0028] The high-pressure gas storage tank 1 can store high-pressure gas as needed. The gas is stored in the high-pressure gas storage tank 1 in a liquid state under high pressure, and the gas storage capacity in the high-pressure gas storage tank 1 is increased. The position for storing the high-pressure gas storage tank 1 is a groove extending forward and backward at the position of the central axis of the automobile chassis. The high-pressure gas storage tank 1 is fixed in the groove and can be installed and fixed by an auxiliary bracket. The groove is preferably made of metal, and the bottom of the groove is sealed by a strip plastic plate. The groove and the plastic plate constitute a cavity for storing the high-pressure gas storage tank 1. This layout can reduce the impact on the interior of the car when an accident occurs to the high-pressure gas storage tank 1. If the sealed environment "explodes", the gas will rush out to the area most likely to break through. The plastic parts avoid collisions with the high-pressure gas storage tank 1 during normal use and have a protective effect. However, the hardness of the plastic parts is significantly smaller than that of the metal parts. The high-pressure impact will cause the plastic sealing plate to fall off or break, providing a vent for the damage of the high-pressure gas storage tank 1. The metal groove can also prevent high-pressure gas and fragments of the high-pressure gas storage tank 1 from impacting the interior of the car, thereby improving the safety of the system.

[0029] The air outlet of the high-pressure gas storage tank 1 is preferably toward the front of the car. The air outlet is provided with a three-way connection. One output is connected to the electric valve 3, and the other output is connected to the manual inflation valve 2. The manual inflation valve 2 can be opened and closed manually. After the high-pressure gas storage tank 1 is used, the manual inflation valve 2 can be used to connect the inflation equipment to replenish the gas for the high-pressure gas storage tank 1 to reach the appropriate air pressure value, so that the high-pressure gas storage tank 1 can be used repeatedly, which greatly reduces the cost of use and contributes to the popularization and promotion of the system.

[0030] The outlet of the electric valve 3 is connected to the input port of the distribution valve 4 through a pipeline. The distribution valve 4 is an electronically controlled device that can switch the preset channel as needed to allow the high-pressure gas at the input port to flow out from the opened channel. Three groups of air nozzles can be set, namely the front end air nozzle 7 at the front of the car, the right side air nozzle 6 on the right side of the car, and the left side air nozzle 5 on the left side of the car. By spraying air in different directions, auxiliary control of the vehicle body is achieved through reaction force.

[0031] Because the air nozzle needs to exert a reaction on the car, it needs to be reliably hard-connected with the car body and generally needs to be fixed on the car frame. There are 2-5 front air nozzles 7, which are symmetrically and side by side and fixed on the front frame of the car. The jet direction of the front air nozzle 7 is toward the front of the car. It is preferably required to adopt a jet direction that is tilted downward. Taking the central axis of the car as a reference, the jet direction is tilted downward by 5-10 degrees. This is because when the front air nozzle 7 is started, the front of the car will inevitably "nod" severely when the brakes are pressed hard. Therefore, there is an upward force to slow down the "nodding" situation, ensure the body posture, maximize the role of the car's anti-collision safety system, and improve ride comfort in extreme situations.

[0032] There are two left-side air nozzles 5 and two right-side air nozzles 6, which are arranged one in front and one in the back. Two right-side air nozzles 6 are fixed on the right side of the vehicle frame to spray air to the right side of the vehicle, and two left-side air nozzles 5 are fixed on the left side of the vehicle frame to spray air to the left side of the vehicle. The spraying direction is horizontal to the side. The right-side air nozzle 6 and the left-side air nozzle 5 are connected to different output ports of the distribution valve 4 through pipelines. The left-side air nozzle 5 and the right-side air nozzle 6 can provide a reverse force when the vehicle skids and deflects, reduce the degree of skidding and deflection of the vehicle, and cooperate with the vehicle ESP to ensure the stability of the vehicle body.

[0033] The entire system can be equipped with a dedicated auxiliary brake controller 8, which is connected to and outputs control signals to the electric valve 3 and the distribution valve 4 to drive and control the entire system. The auxiliary brake controller 8 is connected to the body controller 9 to obtain the body status information, and the body controller 9 determines whether auxiliary control intervention is required. In addition, an air pressure sensor is provided at the air outlet of the high-pressure gas tank 1, and the air pressure sensor is connected to and outputs an air pressure signal to the auxiliary brake controller 8. The air pressure sensor monitors the air pressure in the high-pressure gas tank 1 in real time. After multiple uses, the air pressure in the high-pressure gas tank 1 will decrease, which may affect subsequent use. Therefore, when it is detected that the air pressure drops to the safe lower limit, an alarm can be issued through the instrument panel to encourage users to perform maintenance and inflation in time. Because it can be used and inflated repeatedly, it has a lower cost than disposable consumables such as airbags, and can be used frequently to assist the automobile safety system in stable control.

[0034] During specific control, the vehicle body controller 9 monitors the vehicle state in real time. When the vehicle reaches the condition requiring auxiliary braking, the auxiliary braking condition can be preset as needed, such as when the vehicle deceleration value during braking is greater than the set value, or when the vehicle ESP is started and the vehicle body posture is in a side slip or deflection. When the trigger condition occurs, the vehicle body controller 9 sends an auxiliary braking instruction to the auxiliary braking controller 8, and the auxiliary braking controller 8 sends an execution signal to the electric valve 3 and the distribution valve 4. The specific execution strategy is as follows:

[0035] When the braking force of the vehicle is insufficient, all front-end air jets 7 are opened to directly provide a reverse force through air jets, thereby increasing the braking force of the vehicle and reducing the nodding situation;

[0036] When the car slides to the left, all the left air nozzles 5 are opened to provide a reverse force to the right to return the car to a normal body position;

[0037] When the car slides to the right, all right air nozzles 6 are opened to provide a reverse force to the left, so that the car returns to a normal body position;

[0038] When the car loses control and the front of the car deflects to the right, the car may "turn right", then the left side air nozzle 5 at the left rear and the front air nozzle 7 on the left side are opened to overcome the force of the car turning around and prevent the car from losing control;

[0039] When the car loses control and the front of the car deviates to the left, the car may "turn left", then the right side air nozzle 6 at the right rear and the front side air nozzle 7 on the right side are opened to overcome the force of the car turning around and prevent the car from losing control;

[0040] When the auxiliary braking instruction is executed, if the auxiliary braking conditions are overcome, the electric valve 3 and the distribution valve 4 are closed.

[0041] This system uses a proportional and reduced-mass model car for testing. The experimental plan uses two identical electric car models, one of which carries a high-pressure gas tank. After the two electric car doors drive in a straight line to a stable speed, the drive switch is turned off and the brakes are applied. The open tank of the one carrying the high-pressure gas tank sprays air forward, and the sliding distance of the car from closing the drive to a complete stop is measured. The above experiment is repeated on the same path.

[0042] The following are the driving conditions of the five test vehicles without high-pressure gas tanks:

[0043]

[0044] The following are the average speeds of the vehicles in each section during the five tests without high-pressure gas tanks:

[0045]

[0046] Judging from the average speed of the experimental vehicle calculated above, when the car accelerates to a distance exceeding 10 meters, its speed has exceeded 5m / s, and the subsequent movement speed stabilizes between 5.10-5.50m / S, that is, a uniform motion state of about 18-20 kilometers per hour.

[0047] The following are the driving conditions of the four high-pressure gas tank test vehicles:

[0048]

[0049] Experimental results show that when the pressure is 8.27 atmospheres, the braking distance can be reduced by 7.7% after spraying 300 grams of substance; with the same gas tank pressure, when the spray amount increases to 600 grams, the braking distance can be reduced by more than one meter, reducing the braking distance by more than 30%; when the spray amount increases to 900 grams, even if the gas tank pressure is reduced to 6.2 atmospheres, the braking distance can be reduced to more than 1.5 meters, reducing the braking distance by more than 40%.

[0050] From the experimental results, we can see that the greater the pressure of the gas tank, the more material is sprayed out, and the better the braking effect. This rule is consistent with our expectations. Before spraying, the weight of the whole vehicle (experimental model vehicle) was 3260 grams. The spraying amount in each simulation experiment accounted for 9.2%, 18.4%, 36.4%, and 36.4% of the total weight of the whole vehicle respectively.

[0051] Assuming that the weight of a family car is 1200 kg, the proportional injection quantities to achieve the above injection deceleration and braking effects are 110.4 kg, 220.8 kg, 441.6 kg and 441.6 kg respectively. In the case of increasing the cylinder pressure, the combination of injection quantity and pressure can achieve a reliable deceleration effect, reduce the severity of emergencies, and minimize vehicle damage and casualties.

[0052] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A vehicle brake assist system, the system is provided with a high-pressure gas tank fixed on the vehicle, the gas outlet of the high-pressure gas tank is provided with an electric valve, the outlet of the electric valve is connected to the input port of a distribution valve through a pipeline, the output port of the distribution valve is connected to a front-end air nozzle through a pipeline, the front-end air nozzle is provided with 2-5, the front-end air nozzles are fixed side by side on the front part of the vehicle frame, and the jet direction is toward the front of the vehicle.

2. The automobile brake assist system according to claim 1, Features: The spray direction of the front nozzle is toward the front of the vehicle and deviates 5-10 degrees downward.

3. The automobile brake assist system according to claim 2, Features: The gas outlet of the high-pressure gas storage tank is provided with a three-way connection, one output is connected to an electric valve, and the other output is connected to a manual inflation valve, and the manual inflation valve is used to inject high-pressure gas into the high-pressure gas storage tank.

4. The vehicle brake assist system according to claim 1, 2 or 3, Features: The high-pressure gas storage tank is a columnar structure, and a groove extending forward and backward is provided at the center axis position of the automobile chassis, and the high-pressure gas storage tank is fixed in the groove.

5. The automobile brake assist system according to claim 4, Features: The groove is made of metal, the bottom surface of the groove is sealed by a strip-shaped plastic plate, and the groove and the plastic plate form a cavity for storing the high-pressure gas storage tank.

6. The automobile brake assist system according to claim 1 or 5, Features: Two right-side air jet nozzles for jetting air to the right side of the car are fixed on the right side of the car frame, and two left-side air jet nozzles for jetting air to the left side of the car are fixed on the left side of the car frame. One of the two right-side air jet nozzles and the left-side air jet nozzles is fixed at the front of the car, and the other is fixed at the rear of the car. The right-side air jet nozzle and the left-side air jet nozzle are connected to different output ports of the distribution valve through pipelines.

7. The automobile brake assist system according to claim 6, Features: The system is provided with an auxiliary brake controller, which is connected to and outputs control signals to the electric valve and the distribution valve, and is connected to the body controller to obtain body status information.

8. The automobile brake assist system according to claim 7, Features: The air outlet of the high-pressure air storage tank is provided with an air pressure sensor, and the air pressure sensor is connected to and outputs an air pressure signal to the auxiliary brake controller.

9. The automobile brake assist system according to claim 8, Features: The vehicle body controller monitors the vehicle state in real time. When the vehicle reaches a condition requiring auxiliary braking, the vehicle body controller sends an auxiliary braking instruction to the auxiliary braking controller, and the auxiliary braking controller sends an execution signal to the electric valve and the distribution valve.

10. The automobile brake assist system according to claim 9, Features: When the vehicle's braking force is insufficient, open all front air jets; When the car slides to the left, open all the left air nozzles; When the car slides to the right, open all the right air nozzles; When the car loses control and the front of the car deviates to the right, open the left side air nozzle at the left rear and the left front air nozzle; When the car loses control and the front of the car deviates to the left, open the right rear right side air nozzle and the right front side air nozzle; When executing the auxiliary braking command, if the auxiliary braking conditions are overcome, the electric valve and the distribution valve are closed.

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