The biggest advantage of air suspension is: reducing the impact of liquid flow on the tank body during bumps, protecting the safety of freight; reducing tire wear and reducing fuel consumption. Domestic air suspension has accumulated a wealth of practical experience. With the development of technology, air suspension has become an indispensable standard for high-end heavy trucks and special vehicles.
Generally speaking, models equipped with air-type adjustable suspension will have ground distance sensors near the front and rear wheels. According to the output signal of the ground distance sensor, the trip computer will determine the height of the vehicle and control the air compression. The engine and exhaust valve make the spring automatically compress or extend, thereby reducing or increasing the ground clearance of the chassis to increase the stability of the high-speed vehicle body or the passability of complex road conditions.
Since its birth in the mid-nineteenth century, air suspension has experienced a century of development. It has experienced "pneumatic spring-airbag compound suspension→semi-active air suspension→central charge and discharge suspension (ie ECAS electronically controlled air suspension). System)” and many other changes. It was not applied to trucks, buses, cars and railway cars until the 1950s.
At present, almost all foreign high-end buses use air suspension, and the proportion of heavy-duty trucks using air suspension has reached more than 80%, and the application of air suspension in light vehicles is also rapidly increasing. Air suspension is gradually installed in some cars, such as Lincoln in the United States, Benz300SE and Benz600 in Germany. In some special vehicles (such as instrument vehicles, ambulances, special military vehicles and required container transport vehicles with high requirements for earthquake resistance), the use of air suspension is almost the only option.
In the 1991 Gulf War, the air suspension was composed of fine sand and soft sand because Kuwait was all desert. The U.S. military’s Hummer is equipped with a central inflation and deflation system, that is, an air suspension; the tire pressure is reduced to increase the friction between the tire and the ground. This prevents tire skidding in the desert, and reduces the tire pressure on snow The friction of tires will increase like in the desert. This is the disadvantage of hydraulic suspension. Air suspension and hydraulic suspension have their own advantages. Air suspension can reduce tire pressure and skid resistance, hydraulic suspension can reach high speeds, and can run across mountains and rivers are their respective advantages.
Small turbulence: the adjustment of the air spring can ensure a constant height of the carriage, and can reduce the liquid sloshing caused by the turbulence, reduce the impact on the tank, protect the safety of freight, and increase the service life of the tanker.
High economy: the use of air suspension can effectively reduce tire wear and fuel consumption. According to statistics, under the same road conditions and load conditions, fuel consumption per 100 kilometers has been reduced by more than 1.2 liters.
Enhance the protection of tires and other accessories: the air suspension system can more effectively absorb the vibration caused by the uneven road surface, reduce the distortion and impact of the vehicle during driving, and thus have a better effect on axle parts, tires, frame, box, etc. The protective effect.
Safety: Air suspension transportation is more stable. When running, the center of gravity of the vehicle is almost unchanged. The axial and radial stability is good, and the driving is safer and more reliable. The squat braking system is adopted to effectively avoid the forward impact of the vehicle during emergency braking.