How Does BMW Air Suspension Work?

The shocks of driving on the road are absorbed by air suspension, which uses an electrical air pump or compressor to produce compressed air. Inflatable struts

How Are Air Suspensions Operated?

These coil springs or leaf springs are replaced by compressed, flexible rubber bellows known as air springs in a vehicle that is air-suspended. The vehicle measures the internal air pressure and ride height of an air spring at each corner. The air pressure (which determines the equivalent spring rate) and ride height can be modified to provide the best ride quality and ground clearance for the work at hand. These components include an onboard compressor, air dryer, and air reservoir.

A “Pneumatic Spring for Vehicles” was patented in 1901, making the concept of air suspension almost as old as the automobile. The U.S. military used it on large trucks during World War II to maintain riding height regardless of vehicle load. Air suspension was a standard feature on the Cadillac Eldorado Brougham by the late 1950s, and today the technology is almost always included in high-end luxury vehicles.

An air suspension system is what?

An air suspension system is a suspension system that uses air shocks to replace the original shocks and struts and enable ride height adjustment. Some automobiles come with air suspension as standard equipment, but we can talk more about that in a later post. We will concentrate on aftermarket air suspension systems in this post.

An air compressor, an air tank, a manifold, air lines, and air struts make up air suspension systems. Although there are more minor components, these will serve as the main ones. Together, these parts pull air in, pressurize it, and transmit it to every air strut. The air strut is a strut with an air bladder that can be inflated to lift your vehicle and deflated to lower it. Depending on your particular arrangement, you can control these air suspension systems with a smartphone app or a wired/wireless controller.

What mechanism powers Airmatic suspension? – The evolution of suspension technology and its forms

As you are already aware, I constantly emphasize the value of suspension in all automobile models and believe it to be one of the most crucial components. You’ll see why I believe this after reading the information listed below, I’m sure. So let’s begin by learning everything there is to know about the suspension, including its history, types, and operational principles. Many people think that automotive parts are dull and difficult to grasp, but I’ll try to make it as simple as possible. What exactly is suspension, and why is it so crucial? To put it simply, the system that connects a vehicle to its wheels consists of springs, tires, tire air, shock absorbers, and connections. Any cargo and the vehicle itself are shielded from harm and wear by the suspension. It has grown throughout the years.

The suspension system has undergone extensive development. Carriages were suspended using the earliest technique. It was fastened to the wheeled carriage frame and featured a swing platform on iron chains. Leaf springs emerged as the oldest types of suspension by the 18th century and began to develop. The leaf springs were replaced by elliptical springs after a century. Each suspension component kept evolving. We currently have three separate systems: an Airmatic, a Hydro-gas system, and a Hydrolastic system as a consequence of our extensive development. You can read a brief summary of each system in the section below.

Hydrolastic

The moving part of this system sat at each wheel. The fact that moving rubber acts as a spring and the high-pressure liquid acts as a damping medium is another characteristic. Two valves that are positioned at an angle to one another control the flow of the liquid. The higher valve opens as soon as the pressure of the liquids rises. The liquid can then flow downward thanks to the lower valve opening in the same manner.

Hydrogas

In England, the Hydrogas Suspension System was developed to replace the hydrolastic suspension system, which had failed. Each wheel has a damper unit and an internal spring, which make up the system’s two major components.

Airmatic

The creation of modern airmatic suspension took many years and even decades. The front and rear axles of the vehicle have air springs as part of the air suspension system. The airmatic suspension system shields the car’s body from vibrations caused by uneven roads. Modern automobiles come with factory-installed air or hydraulic suspension systems that are electronically controlled, allowing you to adjust the suspension level to suit your demands. I’ll describe an intriguing must-have gadget that allows you to quickly adjust a car’s level below.

What’s the difference between OE and Aftermarket parts?

Air suspension systems in aftermarket are widely available. Complete kits are available for numerous BMW, Mercedes, and Audi models from businesses like X2 Industries and Air Lift Performance. However, aftermarket air suspension systems differ significantly from OEM air suspension systems. In contrast to aftermarkets, which employ a one-size-fits-all strategy, OE provider Corteco focuses on creating custom suspension systems. Modern suspension component design, testing, and engineering are all handled by their partner business, Vibracoustic, for European manufacturers.

The systems are packaged differently as well. Compressors and reservoir tanks are hidden in a place that was made for them in modern European luxury vehicles. No room is available in your Mk3 GTI 16V for any of it. Instead, if you wish to keep using the back seats, space will need to be made in the trunk. It takes a lot of air to blow up, so you’ll need a tank that’s big enough to contain enough air. The air suspension’s response time is influenced by tank size, with an inadequate tank being the sole serious drawback. A tank that is too small will cause the compressor to work too hard, while a tank that is too large will take up additional room.

The airlines must run to each corner of the suspension and the compressor and air tank must be installed to the vehicle. Drilling and cutting into the body is the simplest way to accomplish that on a car that was not designed with air suspension from the start. Even if the mounting and holes can be done perfectly, not everyone is comfortable wrecking their car. And if you’re not, then all of the parts must be put underneath the vehicle, which won’t be ideal for aftermarket systems that weren’t made to withstand such abuse.

The architecture of OE designs further sets them apart from aftermarket alternatives. While using an elastomer compound coated with cording similar to the OE Corteco parts, aftermarket bellows aren’t constructed to the same specifications. OEM systems, like those from Corteco, must adhere to the strict specifications of the producers, so they create bellows and pistons that are specifically scaled and formed for the intended application. Bellows made by aftermarket suppliers are frequently thicker and designed to handle a variety of demands from numerous applications. The aftermarket is trying to save money by doing this, which contributes to their increased failure rate and subpar performance. Their “one size fits all” method employs a bellow that occasionally struggles to meet the particular needs of the chassis they’re on.

The OE air suspension systems are in a class of their own when it comes to the dampers. Mercedes and BMW use active dampers, which detect the road conditions using a variety of sensors and cameras and then instantly alter the damping and air pressure to keep the car in control and comfortable. Anything similar won’t be present in aftermarket solutions. Instead, you’ll often find a single adjustment knob for compression damping on each strut, allowing your air suspension to withstand whatever circumstances you throw at it.

The replacement cost comes last. IAM, the biggest aftermarket rival to Corteco, demands that either the front and rear air struts and springs be replaced simultaneously. You can avoid replacing everything except the failing strut because Corteco’s springs adhere to OE standards, which will save you time and money.

How dependable is BMW air suspension?

Although the BMW 5 Series Gran Turismo is packed with amazing amenities, one flaw leaps out: the rear air suspension is problematic and, like other air suspensions, will eventually need to be replaced. This is not specific to BMW; air suspensions’ dependability has always been iffy.

What is the process of an air ride suspension?

As of June 2020: It made logical for us to describe how those cars and others—including but not limited to show cars—get so absurdly low after a few stories about VIP style that we ran recently, including one listing our top 5 most popular Bippu builds and another describing what VIP is. The bulk of them accomplish this using air suspension, often known as bags, which, strangely, are not all that dissimilar from coilovers. The trade-off for on-the-fly ride-height and handling flexibility, in addition to the improvements current systems come with, may make a lot of sense to some suspension consumers even if air suspension kits can be more expensive and labor-intensive than coilovers.

Every car’s chassis, body, engine, and drivetrain are suspended above the wheels by a particular arrangement of springs, shocks, bars, and links. The capacity to accelerate, turn, and stop while doing so quite comfortably will be rendered useless if any of it is removed. You know less about suspension tuning than almost anything else, but the problem is that most of those qualities are in conflict with one another.

Even more perplexing than conventional suspension systems, air suspension systems are actually not that dissimilar. The majority of contemporary suspensions consist of a coil spring that is either placed next to or slid over a shock. An air suspension essentially substitutes flexible, pressure-filled air bags that are often made of the same type of rubber as your tires for the coil springs. The bags may be inflated or deflated at the push of a button, instantaneously changing the ride height and suspension characteristics.

Since years, critics have been contrasting air suspension technologies against more traditional coil-spring suspensions, frequently without providing any compelling arguments. The ability of a vehicle’s suspension to effectively utilize the traction capabilities of its tires, distribute traction equally from the front to the rear, and be responsive to the driver’s steering, braking, and throttle inputs are all indicators of how well a suspension is performing. If you pass those tests, it doesn’t really matter if we’re talking about air pillows made of rubber or tightly wound coils of steel.

What benefit does air suspension offer?

The main advantage is ride quality: Automobiles with air suspension are sometimes described as “gliding” over bumps, whereas automobiles with traditional steel spring suspension may have a rougher ride. Air suspension is frequently adjustable as well.

Can air suspension be changed while driving?

  • Make frequent setup adjustments while driving. You see, distracted driving is an issue even with a stock ride, but air suspension can make it far worse. Lift the manually adjustable valves up to go, then let them be. Don’t waste a lot of time fiddling with things because you might damage yourself.
  • Do not correct that line. Ever fasten a hanging line with a cheap zip tie only to forget to fix it later? Yes, go back and correct it properly.
  • Put too much strain on your body. Your tank, valves, and bags all have a maximum PSI rating. Increased pressure shouldn’t be applied since something will fail.
  • Pack your baggage too full. Towing and airbags are OK as long as your bags are rated for the necessary load. This is crucial because you won’t have the same weight ratings if you have a cantilever configuration of some sort.
  • When there is pressure in the system, disassemble your arrangement. Well, not unless you want to shoot that fitting through the wall. Working on your system while it is under stress is not a good idea, really.