Mechanical lifting device for air bag suspension of passenger car and control method

Abstract

The invention discloses a passenger car air bag suspension mechanical lifting device and a control method. The lifting device comprises a lifting mechanical control valve and a side kneeling mechanical control valve. An air reservoir, a two-way valve, a front right lifting control valve, a front left lifting control valve, a rear right lifting control valve, a rear left lifting control valve, a front axle right air bag, a front axle left air bag, a rear axle right air bag and a rear axle left air bag which are mounted on the chassis are connected through pipelines; the lifting mechanical control valve controls the front, back, left and right four lifting control valves by controlling the on-off of compressed air in a pipeline, and the lifting control valves control the compressed air introduced into the air bag so as to realize the rising and falling of the air bag. The side kneeling mechanical control valve controls the front, back, left and right lifting control valves by manually controlling on-off of compressed air in a pipeline, and the lifting control valves control and release the compressed air in the right or left air bag to reduce the height of the air bag, so that side kneeling of the vehicle is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile auxiliary equipment, and in particular to a mechanical lifting device for a passenger car airbag suspension and a control method thereof. Background Art

[0002] As a key device to improve the convenience of passengers getting on and off the vehicle and the vehicle's passability, the bus airbag suspension system currently generally uses solenoid valves and electronic control systems to adjust the airbag height. In the traditional solution, the airbag is inflated and deflated by a solenoid valve, and the height of the vehicle body is monitored and adjusted in real time by sensors, ECUs (electronic control units) and complex wiring harness networks.

[0003] Although this type of electronic control system can achieve precise adjustment, it has the following inherent defects: High system complexity: The solenoid valve needs to work in conjunction with sensors, controllers and software algorithms, resulting in dual integration of the air circuit and the circuit, which takes up a large space and is difficult to assemble. Insufficient reliability: Electronic control components (such as solenoid valves and sensors) are prone to failure in humid, vibrating or extreme temperature environments, and problems such as aging and short circuits of electrical circuits may cause suspension function failure and affect driving safety. Cost and maintenance pressure: High-precision solenoid valves and electronic control modules are expensive, and later maintenance requires professional equipment and technicians, which significantly increases maintenance costs. Functional limitations: Existing systems usually only support overall lifting, and it is difficult to achieve single-sided precise control (such as side kneeling function), or an additional independent electronic control unit is required, further increasing system complexity and cost.

[0004] In addition, in the prior art, complex air circuit designs are often used to coordinate the actions of multiple valve bodies, which can easily lead to operational conflicts due to signal interference (such as air circuit disorder when the lifting and side kneeling commands overlap), affecting control stability. Summary of the invention

[0005] The purpose of the present invention is to provide a mechanical lifting device and control method for passenger car airbag suspension, aiming to overcome the defects of the prior art and solve the problems of complex system structure and high requirements for the electronic control system.

[0006] To this end, the present invention proposes a mechanical lifting device for a passenger car airbag suspension, comprising:

[0007] The lifting mechanical control valve and the side kneeling mechanical control valve installed in the driving area;

[0008] An air storage cylinder, a two-way valve, a front right lifting control valve, a front left lifting control valve, a rear right lifting control valve, and a rear left lifting control valve installed on the chassis; a front axle right airbag, a front axle left airbag, a rear axle right airbag, and a rear axle left airbag are also installed on the chassis;

[0009] The lifting mechanical control valve controls the on and off of compressed gas through pipelines, and is respectively connected to the front right lifting control valve, the front left lifting control valve, the rear right lifting control valve, and the rear left lifting control valve, driving each lifting control valve to switch the gas path to fill or discharge gas into the corresponding airbag to achieve the lifting or lowering of the airbag;

[0010] The side kneeling mechanical control valve is connected to the control ends of the front right lifting control valve and the rear right lifting control valve, as well as the control ends of the front left lifting control valve and the rear left lifting control valve by manually controlling the on-and-off of the compressed gas in the pipeline, and drives the right or left lifting control valve to switch the gas path to discharge the gas in the corresponding airbag, thereby realizing the unilateral lowering of the vehicle to form a side kneeling posture.

[0011] As a preferred technical solution of the present application, the lifting machinery control valve has an air inlet, two air outlets and an exhaust port; the lifting control valve has two independent control ports, which switch the conduction state between the air inlet and the air outlet, or switch the conduction state between the air outlet and the exhaust port by receiving the air pressure signal of the lifting machinery control valve.

[0012] As a preferred technical solution of the present application, the side kneeling mechanical control valve has an air inlet, two air outlets and an exhaust port; the lifting control valve (5-8) has two independent control ports (41, 42), which switches the conduction state between the air inlet and the air outlet, or switches the conduction state between the air outlet and the exhaust port by receiving the air pressure signal of the side kneeling mechanical control valve.

[0013] As a preferred technical solution of the present application, it is characterized in that the air outlet of the side kneeling mechanical control valve is respectively connected to the control ports of the right lifting control valve and the left lifting control valve through a two-way valve, and the two-way valve is set to four groups, which are respectively installed at the control port of each lifting control valve, for isolating the air path signal interference between the lifting mechanical control valve and the side kneeling mechanical control valve.

[0014] The present invention also proposes a control method for a mechanical lifting device of a passenger car airbag suspension, which is characterized by comprising the following steps: lifting control:

[0015] S1. Operate the lifting mechanical control valve to switch the conduction state between its air inlet and the first air outlet or the second air outlet;

[0016] S2. The compressed gas is transported from the gas storage cylinder to the corresponding control port of each lifting control valve through the conduction outlet of the lifting mechanical control valve;

[0017] S3. When the control port receives the air pressure signal, the lifting control valve switches the air circuit state:

[0018] If the control port is pressurized, its air inlet and outlet are connected, and the corresponding airbag is inflated to raise the vehicle body;

[0019] If the control port is pressurized, its air outlet and exhaust port are connected, and the gas in the corresponding airbag is discharged to lower the vehicle body.

[0020] As a preferred technical solution of this application, it also includes side kneeling control:

[0021] S4. Operate the side kneeling mechanical control valve to switch the conduction state of its air inlet and the first air outlet or the second air outlet;

[0022] S5. The compressed gas is delivered to the control port of the right lifting control valve or the left lifting control valve through the conduction outlet of the side kneeling mechanical control valve and the two-way valve;

[0023] S6. After the control port of the lift control valve on the target side is pressurized, its air outlet and exhaust port are connected to discharge the gas in the airbag on the corresponding side, so that the vehicle is lowered on one side to form a side kneeling posture.

[0024] As a preferred technical solution of the present application, in step S5, the two-way valve blocks the gas supply from the lifting mechanical control valve to the control port during the side kneeling control process to avoid conflicts between the lifting and side kneeling control signals.

[0025] As a preferred technical solution of the present application, in steps S1 and S4, the operations of the lifting mechanical control valve and the side kneeling mechanical control valve are both manual mechanical switching, without the need for electrical control signal intervention.

[0026] The present invention provides a mechanical lifting device and control method for a passenger car air bag suspension. The lifting mechanical control valve controls the on-off of compressed gas in the pipeline to achieve control with the front right lifting control valve, the front left lifting control valve, the rear right lifting control valve and the rear left lifting control valve. The lifting control valve controls the compressed gas introduced into the airbag to achieve raising and lowering of the airbag. The side kneeling mechanical control valve controls the on-off of compressed gas in the pipeline to achieve control with the front right lifting control valve and the rear right lifting control valve, the front left lifting control valve and the rear left lifting control valve. The lifting control valve controls the release of compressed gas in the right or left airbag to lower the height of the airbag and achieve side kneeling of the vehicle.

[0027] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 It is a structural schematic diagram of the mechanical lifting device for passenger car airbag suspension of the present invention;

[0030] Explanation of the reference numerals in the accompanying drawings: 5. Front right lifting control valve; 6. Front left lifting control valve; 7. Rear right lifting control valve; 8. Rear left lifting control valve; 9. Front axle right airbag; 10. Front axle left airbag; 11. Rear axle right airbag; 12. Rear axle left airbag; 13. Lifting mechanical control valve; 14. Side kneeling mechanical control valve; 15. Air cylinder; 16. Two-way valve; 1. Air inlet; 2. Air outlet; 21. Air outlet; 22. Air outlet; 3. Exhaust port; 41. Control port; 42. Control port. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] like Figure 1 The mechanical lifting device for passenger car airbag suspension shown in the figure includes a lifting mechanical control valve 13 and a side kneeling mechanical control valve 14 installed in the driving area, an air reservoir 15 installed on the chassis, a two-way valve 16, a front right lifting control valve 5, a front left lifting control valve 6, a rear right lifting control valve 7, a rear left lifting control valve 8, a front axle right airbag 9, a front axle left airbag 10, a rear axle right airbag 11 and a rear axle left airbag 12. The air reservoir 15, the mechanical control valve, the two-way valve 16, the lifting control valve and the airbag are connected by pipelines.

[0033] Furthermore, the lifting mechanical control valve 13 and the side kneeling mechanical control valve 14 have an air inlet 1, two air outlets, and an exhaust port 3, and the conduction state of the air inlet and the air outlet can be manually controlled. The front right lifting control valve 5, the front left lifting control valve 6, the rear right lifting control valve 7, and the rear left lifting control valve 8 have two control ports (41 / 42), an air inlet 1 and an air outlet 2, and an exhaust port 3. The lifting control valve has two control ports, which can control the conduction state of the air inlet and the air outlet.

[0034] Furthermore, the two air outlets of the lifting mechanical control valve 13 are connected to the two control ports of the four lifting control valves in front, back, left and right directions by pipelines. The air outlet 21 of the side kneeling mechanical control valve 14 is connected to the control port 42 of the front right lifting control valve 5 and the control port 42 of the rear right lifting control valve 7 by pipelines through the two-way valve 16, respectively. The air outlet 22 of the side kneeling mechanical control valve 14 is connected to the control port 42 of the front left lifting control valve 6 and the control port 42 of the rear left lifting control valve 8 by pipelines through the two-way valve 16.

[0035] The installation method of the present invention is as follows: the first step is to connect the air storage cylinder 15 and the air inlet 1 of the lifting mechanical control valve and the air inlet 1 of the side kneeling mechanical control valve with a pipeline; the second step is to connect the air outlet 21 of the lifting mechanical control valve 13 with the control ports 41 of the front right lifting control valve 5, the front left lifting control valve 6, the rear right lifting control valve 7, and the rear left lifting control valve 8 with a pipeline, and connect the air outlet 22 of the side kneeling mechanical control valve 14 with the control ports 42 of the front right lifting control valve 5, the front left lifting control valve 6, the rear right lifting control valve 7, and the rear left lifting control valve 8 with a pipeline;

[0036] The third step is to connect the air outlet 21 of the side kneeling mechanical control valve 14 with the control ports 41 of the front right lifting control valve 5, the front left lifting control valve 6, the rear right lifting control valve 7, and the rear left lifting control valve 8 through a pipeline, and connect the air outlet 22 of the side kneeling mechanical control valve 14 with the control ports 42 of the front right lifting control valve 5, the front left lifting control valve 6, the rear right lifting control valve 7, and the rear left lifting control valve 8 through a pipeline;

[0037] The fourth step is to connect the air storage cylinder 15 with the air inlet 1 of the four lifting control valves at the front, rear, left and right sides by pipelines, and connect the air outlet 2 of the four lifting control valves at the front, rear, left and right sides with the air bags at the front, rear, left and right sides.

[0038] Another object of the present invention is to provide a control method for a mechanical lifting device for a passenger car airbag suspension, comprising the following steps:

[0039] S1: Operate the lifting mechanical control valve to connect its air inlet 1 with the air outlet 21, the lifting mechanical control valve air outlet 21 is connected with the four lifting control valve control ports 41 in the front, back, left and right, the compressed gas in the air cylinder reaches the four lifting control valve control ports 41, at this time, the four lifting control valve air inlet 1 and air outlet 2 are connected, the compressed gas in the air cylinder is filled into the airbag, so that the airbag rises, reaches the set height, and stops inflation.

[0040] S2: Operate the lifting mechanical control valve to connect its air inlet 1 with the air outlet 22, and the lifting mechanical control valve air outlet 21 is connected with the four lifting control valve control ports 42 in the front, back, left and right. At this time, the compressed gas in the air storage cylinder reaches the four lifting control valve control ports 42. At this time, the four lifting control valve air outlets 2 are connected with the exhaust ports 3 to discharge the gas in the airbag, causing the airbag to descend to the set height and stop exhausting.

[0041] S3: Operate the side kneeling mechanical control valve to connect its air inlet 1 with the air outlet 21, and the side kneeling mechanical control valve air outlet 21 is connected with the front right and rear right lifting control valve control ports 42. At this time, the compressed gas in the air storage cylinder reaches the four lifting control valve control ports 42. At this time, the two lifting control valve air outlets 2 are connected with the exhaust port 3 to discharge the gas in the airbag, causing the airbag to drop. At this time, the right side of the vehicle kneels, reaches the set height, and stops exhausting.

[0042] S4: Operate the side kneeling mechanical control valve to connect its air inlet 1 with the air outlet 22, and the side kneeling mechanical control valve air outlet 22 is connected with the front left and rear left lifting control valve control ports 42. At this time, the compressed gas in the air storage cylinder reaches the four lifting control valve control ports 42. At this time, the two lifting control valve air outlets 2 are connected with the exhaust ports 3 to discharge the gas in the airbag, causing the airbag to drop. At this time, the left side of the vehicle kneels, reaches the set height, and stops exhausting.

[0043] The working principle and working process of the mechanical lifting device for passenger car air bag suspension of the present invention are briefly described below.

[0044] The mechanical control valve of the present invention is connected with the lifting control valve through a pipeline. When operating the lifting mechanical control valve, the mechanical control valve is operated to connect its air inlet 1 with the air outlet 21 or 22, and the compressed gas in the air storage cylinder 15 reaches the control port 41 or 42 of the lifting control valve through the pipeline. The lifting control valve air inlet 1 is controlled to connect with the air outlet 2 or the air outlet 2 is controlled to connect with the exhaust port 3 to control the gas filling or discharge in the airbag, so that the airbag rises or falls. When operating the side kneeling mechanical control valve, the mechanical control valve is operated to connect its air inlet 1 with the air outlet 21 or 22, and the compressed gas in the air storage cylinder reaches the control port 42 of the left or right lifting control valve through the pipeline. The air outlet 2 of the left or right lifting control valve is controlled to connect with the exhaust port 3 to control the gas discharge in the airbag, so that the airbag falls, and the left and right side kneeling is realized. At the same time, 4 two-way valves are installed in the pipeline, which are set at the control ports 42 of the four lifting control valves to avoid interference between the lifting mechanical control valve and the side kneeling mechanical control valve.

[0045] The mechanical lifting device for passenger car airbag suspension of the present invention also has the following advantages: 1) Precise mechanical control: the lifting and side kneeling functions are directly operated by manual mechanical valves to open and close the air circuit, avoiding electronic control delays or malfunctions, and the response is more direct and reliable. 2) Independent side control: the side kneeling mechanical control valve can independently control the exhaust of the left and right airbags of the vehicle to achieve precise side kneeling angle adjustment to meet different boarding and alighting requirements. 3) Anti-interference design: the two-way valve isolates the lifting and side kneeling control signals to ensure that the operations of the two do not affect each other, thereby improving system stability. 4) Low maintenance cost: there are no electronic components, and only regular inspections of the air circuit sealing are required. The maintenance difficulty and cost are significantly lower than the solenoid valve system. 5) Emergency operation guarantee: in the event of a power outage or failure of the electronic control system, the vehicle body height can still be manually adjusted through a mechanical valve to improve the vehicle's emergency response capabilities.

[0046] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mechanical lifting device for passenger car airbag suspension, characterized in that: include: A lifting mechanical control valve (13) and a side kneeling mechanical control valve (14) installed in the driving area; An air storage cylinder (15), a two-way valve (16), a front right lifting control valve (5), a front left lifting control valve (6), a rear right lifting control valve (7), and a rear left lifting control valve (8) are installed on the chassis; a front axle right air bag (9), a front axle left air bag (10), a rear axle right air bag (11), and a rear axle left air bag (12) are also installed on the chassis; The lifting mechanical control valve (13) controls the on and off of compressed gas through pipelines, and is respectively connected to the front right lifting control valve (5), the front left lifting control valve (6), the rear right lifting control valve (7), and the rear left lifting control valve (8), and drives each lifting control valve to switch the gas path to fill or discharge gas into the corresponding airbag (9-12), thereby realizing the lifting or lowering of the airbag; The side kneeling mechanical control valve (14) is connected to the control ends of the front right lifting control valve (5) and the rear right lifting control valve (7), and the control ends of the front left lifting control valve (6) and the rear left lifting control valve (8) respectively by manually controlling the on-off of the compressed gas in the pipeline, and drives the right or left lifting control valve to switch the gas path to discharge the gas in the corresponding airbag (9, 11 or 10, 12), so as to realize the unilateral lowering of the vehicle to form a side kneeling posture.

2. The mechanical lifting device for passenger car airbag suspension according to claim 1 is characterized in that: The lifting mechanism control valve (13) has an air inlet (1), two air outlets (21, 22) and an exhaust port (3); the lifting mechanism control valve (5-8) has two independent control ports (41, 42) which, by receiving the air pressure signal of the lifting mechanism control valve (13), switch the conduction state of its air inlet (1) and air outlet (2), or switch the conduction state of the air outlet (2) and exhaust port (3).

3. The mechanical lifting device for passenger car airbag suspension according to claim 1, characterized in that: The side-kneeling mechanical control valve (14) has an air inlet (1), two air outlets (21, 22) and an exhaust port (3); the lifting control valve (5-8) has two independent control ports (41, 42), which switch the conduction state of its air inlet (1) and air outlet (2), or switch the conduction state of the air outlet (2) and exhaust port (3) by receiving the air pressure signal of the side-kneeling mechanical control valve (14).

4. The mechanical lifting device for passenger car airbag suspension according to claim 1, characterized in that: The air outlets (21, 22) of the side kneeling mechanical control valve (14) are respectively connected to the control ports (42) of the right lifting control valve (5, 7) and the left lifting control valve (6, 8) through the two-way valve (16), and the two-way valve (16) is arranged in four groups, which are respectively installed at the control ports (42) of each lifting control valve (5-8) to isolate the air path signal interference between the lifting mechanical control valve (13) and the side kneeling mechanical control valve (14).

5. The control method for a mechanical lifting device of a passenger car airbag suspension according to any one of claims 1 to 4, characterized in that: The following steps are included: Lifting control: S1. Operate the lifting mechanical control valve (13) to switch the conduction state between its air inlet (1) and the first air outlet (21) or the second air outlet (22); S2. The compressed gas is delivered from the gas storage cylinder (15) to the corresponding control port (41 or 42) of each lifting control valve (5-8) through the conduction outlet of the lifting mechanical control valve (13); S3. When the control port (41 or 42) receives the air pressure signal, the lifting control valve (5-8) switches the air circuit state: If the control port (41) is pressurized, the air inlet (1) and the air outlet (2) are connected, and the corresponding airbags (9-12) are inflated to raise the vehicle body; If the control port (42) is pressurized, the gas outlet (2) and the exhaust port (3) are connected, and the gas in the corresponding airbag (9-12) is discharged to lower the vehicle body.

6. The control method for the mechanical lifting device of the passenger car airbag suspension according to claim 5, characterized in that: Also includes side kneeling control: S4. Operate the side kneeling mechanical control valve (14) to switch the conduction state between the air inlet (1) and the first air outlet (21) or the second air outlet (22); S5. The compressed gas is delivered to the control port (42) of the right lifting control valve (5, 7) or the left lifting control valve (6, 8) through the side kneeling mechanical control valve (14) and the two-way valve (16); S6. After the control port (42) of the lift control valve (5-8) on the target side is pressurized, its air outlet (2) and exhaust port (3) are connected to discharge the gas in the corresponding side airbag (9, 11 or 10, 12), so that the vehicle is lowered on one side to form a side kneeling posture.

7. The control method for the mechanical lifting device of the passenger car airbag suspension according to claim 6, characterized in that: In step S5, the two-way valve (16) blocks the gas supply from the lifting mechanical control valve (13) to the control port (42) during the side kneeling control process to avoid conflicts between the lifting and side kneeling control signals.

8. The control method for the mechanical lifting device of the passenger car airbag suspension according to claim 6, characterized in that: In steps S1 and S4, the operations of the lifting mechanical control valve (13) and the side kneeling mechanical control valve (14) are all manual mechanical switching, without the need for electrical control signal intervention.

Images