How does magnetic shock absorber works?
This type of suspension was installed for the first time in 2002 on the Cadillac Seville STS by GM. And then was embedded on the many others cars including the Chevrolet and Buick. This production was unveiled by Audi Company in R8 and TT models in Germany.
A factor that has distinguished this type of suspension from other is the absence of any electro-mechanical valve. Instead it, the magnetic suspension is designed based on magnetic rheological fluid (MR). This fluid is a smart fluid that works directly with magnetic.
MR fluid is usually like oil and is filled by fine magnet particles in the size of micro-meter range. When this smart fluid is influenced by the magnetic field, the fluid's viscosity increases, so that it also called viscoelastic solid.
Each MR fluid has 20 to 40% iron averagely, which are suspended in a mineral oil foundation. Also this fluid is carrier of kinetics oil, water and glycol. In this type of fluid, some fine particles are applied that prevents the precipitation of iron's micro particles.
When the wire around the shock absorber that contains the MR fluid does not enter the energy to the system, the system is in off Position mode and particles in the smart fluid are divided randomly. They can move freely throughout the fluid. In this case, the damper system function is like a conventional suspension system with the old fluid.
Whenever the system is in the On Position Mode, the magnetic field is applied to the system; actually it is applied to the smart fluid inside the damper. This makes to particles in the fluid arranged parallel to the length of the damper body, and such as iron particles takes a certain direction against the magnet. Usually, the iron particles oriented is perpendicular to the direction of smart fluid motion. The fluid's resistance against the force or the viscosity depends on the magnetic field intensity and its power.
Thanks to the use of ECU in most cars, suspension modes are selectable by driver that changing between the situations is done in a fraction of a second. Sensors monitor the condition of road and car and related controller changes the characteristics of damper nearly 1000 times per second.
For example, consider the Audi TT. The driver can change the suspension system to normal or sport mode by pushing a button. In this mode the dampers indicate appropriate response with selection mode. In fact, according to driver selection and decision-making of ECU to determine the damper characteristics, the car performs the necessary response. The use of MR fluid guarantees stable and better drive for you. In fact, it completes the car's Stability Control system in different atmospheric and road conditions. Despite the computer system of ECU, MR fluid can produce a wide range of damping forces and impose the appropriate and quick response.
Of the magnetic fields advantages can be pointed to the lack of environmental temperature effect on it. MR fluid's working range is between -40 ° C to 105 ° C.
The biggest disadvantage of this system is its finished expense. So far only half a million rheological magnetic suspension system is installed on the world cars. Undoubtedly as soon as fixing the problem of finished expense, it will be certainly the best type of suspension systems. So far Acura MDX, Audi TT, Audi R8, Cadillac DTS, SRX, STS, Chevrolet Corvette, Ferrari 599 GTB and Holden HSV Commodore cars take the advantage from this suspension system.
In the future of car makers, it is likely that the smart fluids have been used in the clutch system that can have many applications by pressing a button on 4WD cars.
A factor that has distinguished this type of suspension from other is the absence of any electro-mechanical valve. Instead it, the magnetic suspension is designed based on magnetic rheological fluid (MR). This fluid is a smart fluid that works directly with magnetic.
MR fluid is usually like oil and is filled by fine magnet particles in the size of micro-meter range. When this smart fluid is influenced by the magnetic field, the fluid's viscosity increases, so that it also called viscoelastic solid.
Each MR fluid has 20 to 40% iron averagely, which are suspended in a mineral oil foundation. Also this fluid is carrier of kinetics oil, water and glycol. In this type of fluid, some fine particles are applied that prevents the precipitation of iron's micro particles.
When the wire around the shock absorber that contains the MR fluid does not enter the energy to the system, the system is in off Position mode and particles in the smart fluid are divided randomly. They can move freely throughout the fluid. In this case, the damper system function is like a conventional suspension system with the old fluid.
Whenever the system is in the On Position Mode, the magnetic field is applied to the system; actually it is applied to the smart fluid inside the damper. This makes to particles in the fluid arranged parallel to the length of the damper body, and such as iron particles takes a certain direction against the magnet. Usually, the iron particles oriented is perpendicular to the direction of smart fluid motion. The fluid's resistance against the force or the viscosity depends on the magnetic field intensity and its power.
Thanks to the use of ECU in most cars, suspension modes are selectable by driver that changing between the situations is done in a fraction of a second. Sensors monitor the condition of road and car and related controller changes the characteristics of damper nearly 1000 times per second.
For example, consider the Audi TT. The driver can change the suspension system to normal or sport mode by pushing a button. In this mode the dampers indicate appropriate response with selection mode. In fact, according to driver selection and decision-making of ECU to determine the damper characteristics, the car performs the necessary response. The use of MR fluid guarantees stable and better drive for you. In fact, it completes the car's Stability Control system in different atmospheric and road conditions. Despite the computer system of ECU, MR fluid can produce a wide range of damping forces and impose the appropriate and quick response.
Of the magnetic fields advantages can be pointed to the lack of environmental temperature effect on it. MR fluid's working range is between -40 ° C to 105 ° C.
The biggest disadvantage of this system is its finished expense. So far only half a million rheological magnetic suspension system is installed on the world cars. Undoubtedly as soon as fixing the problem of finished expense, it will be certainly the best type of suspension systems. So far Acura MDX, Audi TT, Audi R8, Cadillac DTS, SRX, STS, Chevrolet Corvette, Ferrari 599 GTB and Holden HSV Commodore cars take the advantage from this suspension system.
In the future of car makers, it is likely that the smart fluids have been used in the clutch system that can have many applications by pressing a button on 4WD cars.
Comments
Post a Comment