CN203995545U - Three axle passenger vehicle lift bridge control system - Google Patents

Abstract

The utility model relates to a lifting bridge control system for a three-axis passenger car. The left front airbag and the right front airbag are connected to one end of a three-way I through a height valve I, and the other two ends of the three-way I are respectively connected to a three-way II and a three-way V. Axle lifting airbag normally closed solenoid valve and air reservoir are connected to the other two ends of tee II through overflow valve, left middle airbag is always connected to solenoid valve I and left rear airbag I is connected to tee III, right middle airbag is always connected to solenoid valve II and the right rear airbag I are connected to the tee IV, one end of the left rear airbag II and the tee III is connected to the tee V through the height valve II, and one end of the right rear airbag II and the tee IV is connected to the tee through the height valve III Tee V. The structure of the control system is simple, and the lifting of the lifting axle will not interfere with the normal operation of the suspension airbags of the front and rear axles, thereby improving the reliability of the vehicle.

Description

Lifting axle control system for three-axle passenger car

technical field

The utility model relates to an air suspension three-axis passenger car hoisting bridge control system.

Background technique

An existing electronically controlled lifting device for an air suspension for a vehicle is an electronically controlled lifting device for an air suspension for a vehicle controlled by mechanical and electrical conversion according to requirements. Through two pipelines, the air source is connected to the airbag spring; the first one is connected to the airbag spring through the mechanical height valve and the manual automatic switching valve, and the second is connected to the airbag spring through the height control driving valve and the manual automatic switching valve. The solenoid valve coil is powered by the automatic manual transfer switch; the air spring control power of the manual automatic transfer valve is transferred to the height control drive valve by the lift switch. In this scheme, the circuit control needs two switches and corresponding solenoid valves, and in addition to the mechanical height valve, a special height control drive valve is also required. The realization of the whole control is relatively complicated, and the system is complicated, especially the increase of electrical components. , easily lead to a decrease in the reliability of the system.

Contents of the invention

In order to overcome the deficiencies of the above technologies, the utility model provides a three-axis passenger car lifting bridge control system that realizes lifting of the lifting bridge according to vehicle conditions.

The technical solution adopted by the utility model to overcome its technical problems is:

The lifting axle control system of a three-axis passenger car includes left front airbags and right front airbags installed at the left and right ends of the front axle of the vehicle, left middle airbags and right middle airbags installed at the left and right ends of the lifting axle, and middle axle lifting airbags installed in the middle of the lifting axle. Airbags, and the left rear airbag I, left rear airbag II, right rear airbag I, and right rear airbag II respectively installed at the left and right ends of the rear axle, the left front airbag and the right front airbag are connected to one end of the tee I through the height valve I, The other two ends of the three-way I are respectively connected to the three-way II and the three-way V, and the normally closed electromagnetic valve and the air storage tank of the middle bridge lifting airbag are connected to the other two ends of the three-way II through the overflow valve. The solenoid valve I and the left rear airbag I are always connected to the tee III, the right middle airbag is always connected to the solenoid valve II and the right rear airbag I is connected to the tee IV, and one end of the left rear airbag II and the tee III is connected to The height valve II is connected to the tee V, the right rear airbag II and one end of the tee IV are connected to the tee V through the height valve III, and the normally closed solenoid valve, open solenoid valve I and normally open solenoid valve II are electrically connected on the switch.

The beneficial effects of the utility model are: through the switch control of the normally closed solenoid valve, the open solenoid valve I and the normally open solenoid valve II, when the vehicle is under heavy load, the air pressure of the middle bridge lifting airbag is released, and the left middle airbag and the right middle airbag are ventilated. The wheels of the lifting axle are brought into contact with the ground, and the lifting axle bears the load of the whole vehicle. When the vehicle is driving on a good road and the vehicle load is light, the lifting airbag of the middle axle is inflated, and the air pressure in the left middle airbag and the right middle airbag is released through the normally open solenoid valve Ⅰ and normally open solenoid valve Ⅱ. To effectively reduce vehicle friction. The structure of the control system is simple, and the lifting of the lifting axle will not interfere with the normal operation of the suspension airbags of the front and rear axles, thereby improving the reliability of the vehicle.

Description of drawings

Fig. 1 is the schematic structural diagram of the front view of the axle position of the utility model;

Fig. 2 is a structural schematic diagram of the overhead view of the axle position of the utility model;

Fig. 3 is the principle structural diagram of the pneumatic system of the present utility model;

In the figure, 1. Left front airbag 2. Middle bridge lifting airbag 3. Left rear airbag Ⅰ 4. Left rear airbag Ⅱ 5. Right front airbag 6. Right rear airbag Ⅰ 7. Right rear airbag Ⅱ 8. Left middle airbag 9. Right middle Airbag 10. Tee Ⅰ 11. Tee Ⅱ 12. Tee Ⅲ 13. Tee Ⅳ 14. Tee Ⅴ.

Detailed ways

Below in conjunction with accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 the utility model is described further.

The lift axle control system for a three-axis passenger car includes left front airbags 1 and right front airbags 5 installed at the left and right ends of the front axle of the vehicle, left middle airbags 8 and right middle airbags 9 installed at the left and right ends of the lift axle, and installed in the middle of the lift axle. Lifting airbag 2 for the middle axle, and the left rear airbag Ⅰ 3, left rear airbag Ⅱ 4, right rear airbag Ⅰ 6, right rear airbag Ⅱ 7 installed at the left and right ends of the rear axle respectively, and the left front airbag 1 and right front airbag 5 pass through the height valve Ⅰ is connected to one end of the tee I 10, and the other two ends of the tee I 10 are respectively connected to the tee II 11 and the tee V 14. The other two ends of the channel II 11, the left middle airbag 8 is always connected to the solenoid valve I and the left rear airbag I 3 is connected to the three-way III 12, the right middle airbag 9 is always connected to the solenoid valve II and the right rear airbag I 6 is connected to the three-way IV 13. One end of the left rear airbag II 4 and the tee III 12 is connected to the tee V 14 through the height valve II, and one end of the right rear airbag II 7 and the tee IV 13 is connected to the tee V 14 through the height valve III. When the vehicle load is heavy or when the vehicle is being inspected, press the switch to cut off the power to the solenoid valve. When the normally closed solenoid valve is powered off, the normally closed solenoid valve circuit is closed, the air pressure of the middle bridge lift air bag 2 is released, and the normally open solenoid valve I and normally open The solenoid valve II circuit is connected, and the left middle airbag 8 and right middle airbag 9 on the lifting axle pass through the pipeline with the left rear airbag I 3, left rear airbag II 4, right rear airbag I 6 and right rear airbag II 7 on the rear axle It communicates with the air storage tank, so that the wheels of the lifting axle are in contact with the ground, and the lifting axle bears the load of the whole vehicle.

When the vehicle is running on a good road surface, the load of the vehicle is relatively light. During normal driving, when the switch is pressed and the solenoid valve is energized, the normally closed solenoid valve circuit is connected, and the middle bridge lifting air bag 2 on the lifting axle is inflated. While the normally open electromagnetic valve I and normally open electromagnetic valve II circuits are closed, because the left rear airbag I 3, the left rear airbag II 4, the right rear airbag I 6 and the right rear airbag II 7 on the rear axle are in contact with the left middle airbag on the lifting axle. Airbag 8 and right middle airbag 9 have independent pipelines, and the air pressure in left middle airbag 8 and right middle airbag 9 is released through normally-on solenoid valve Ⅰ and normally-on solenoid valve Ⅱ. At this time, the wheels of the lifting axle are lifted off the ground, effectively reducing vehicle friction force.

Since the normally closed solenoid valve, open solenoid valve Ⅰ and normally open solenoid valve Ⅱ are controlled by the same switch, it is simple and effective to ensure the synchronization of the work of each airbag. The lift axle can be lifted and lowered under both parking and driving conditions.

Left front airbag 1 and right front airbag 5 are controlled by height valve Ⅰ, left rear airbag Ⅰ 3 and left rear airbag Ⅱ 4 are controlled by height valve Ⅱ, right rear airbag Ⅰ 6 and right rear airbag Ⅱ 7 are controlled by height valve Ⅲ, which can ensure the same The height of the side airbags is consistent, and the inflation and deflation actions are consistent, so as to avoid problems such as inconsistent loading of the airbags on the same side and instability of the vehicle body. On the premise of ensuring the normal operation of the suspension airbag, the lifting and lowering of the lifting axle is realized, which not only ensures the reliable, stable and comfortable driving performance provided by the air suspension, but also realizes the easy conversion of economical driving and power bearing.

Claims (1)

1. an axle passenger vehicle lift bridge control system, comprise the left front air bag (1) and the right front air bag (5) that are arranged on respectively two ends, vehicle propons left and right, be arranged on left air bag (8) and the right air bag (9) at two ends, lift bridge left and right, the jackshaft that is arranged on lift bridge middle part promotes air bag (2), and be arranged on respectively the left back air bag I (3) at two ends, back axle left and right, left back air bag II (4) and right back air bag I (6), right back air bag II (7), it is characterized in that: described left front air bag (1) and right front air bag (5) are connected in one end of threeway I (10) through levelling valve I, the another two ends of described threeway I (10) are connected to threeway II (11) and threeway V (14), jackshaft lifting air bag (2) is connected in the another two ends of threeway II (11) through by pass valve through normally closed solenoid valve and air receiver, the frequent three-way electromagnetic valve I of described left air bag (8) and left back air bag I (3) are connected in threeway III (12), the frequent three-way electromagnetic valve II of described right air bag (9) and right back air bag I (6) are connected in threeway IV (13), one end of described left back air bag II (4) and threeway III (12) is connected in threeway V (14) through levelling valve II, one end of described right back air bag II (7) and threeway IV (13) is connected in threeway V (14) through levelling valve III, described normally closed solenoid valve, three-way electromagnetic valve I and normal open electromagnetic valve II are electrically connected on switch.