How does electronic suspension work?
Discussion
What do you mean by 'electronic suspension'? Do you mean this?
At one end of the spectrum there are conventional dampers with valving that can be adjusted remotely be means of electronic servos, at the other end there are systems like Lotus Active... a lot of different things could fall within the description of 'electronic suspension'.
At one end of the spectrum there are conventional dampers with valving that can be adjusted remotely be means of electronic servos, at the other end there are systems like Lotus Active... a lot of different things could fall within the description of 'electronic suspension'.
Do you mean active suspension? If so it's electronically controlled, mechanical actuators in place of (or possibly as well as) springs and dampers. All controlled by a black box containing the net worth of a million software boffins.
Huffs on nails and polishes collar bone in the knowledge of an A+ coursework result
Huffs on nails and polishes collar bone in the knowledge of an A+ coursework result
Newer Corvetts, can have the F55 magnetic ride suspension.
You can select Sport or Touring.
See here
http://en.wikipedia.org/wiki/Magneto_rheological_d...
An electric charge is passed to the shockers, which have some sort of carbon elements in fluid suspension.
The electric charge, either lines-up the carbon elements, or lets them go free, therby stiffening up the ride.
like night and day
I think ferrari also adopted it on some of there models
You can select Sport or Touring.
See here
http://en.wikipedia.org/wiki/Magneto_rheological_d...
An electric charge is passed to the shockers, which have some sort of carbon elements in fluid suspension.
The electric charge, either lines-up the carbon elements, or lets them go free, therby stiffening up the ride.
like night and day
I think ferrari also adopted it on some of there models
lol....look under the bonnet of a bmw 740 sport....strip the top of the strut mount.....you'll see what looks like the top of a koni shocker....with a sloted bolt, into which locates a pin....conected to a motor.....motor turns right, shockie gets stiffer, left lets it loosen up a bit.
electronic susspension ?
electronic susspension ?
As I understand it, there are a couple, (at least) of methods out there...
(1) Traditional bump / rebound type adjusters with servos or stepper motors winding the bump / rebound on and off.
(2) Ferrous particles suspended in the damper fluid, with a coil of wire acting as an electro-magnet wound around the inner damper tube, as you energise the coil you change the properties of the fluid. Maybe someone else can explain this in more detail but as far as I understand, it's kept fairly secretive by damper companies.
In terms of how you then control it, you could have the driver / rider manually control bump and rebound whilst on the move or you could automate the system for example:
GPS - Track position based damping - Change the rates depending upon the surface at a particular point on the track, (similar to track based traction control)
Control via a data logger - Looking at channels such as slip angle for oversteer or understeer you could then change the characteristics of the damper to compensate for slip.
Jason.
(1) Traditional bump / rebound type adjusters with servos or stepper motors winding the bump / rebound on and off.
(2) Ferrous particles suspended in the damper fluid, with a coil of wire acting as an electro-magnet wound around the inner damper tube, as you energise the coil you change the properties of the fluid. Maybe someone else can explain this in more detail but as far as I understand, it's kept fairly secretive by damper companies.
In terms of how you then control it, you could have the driver / rider manually control bump and rebound whilst on the move or you could automate the system for example:
GPS - Track position based damping - Change the rates depending upon the surface at a particular point on the track, (similar to track based traction control)
Control via a data logger - Looking at channels such as slip angle for oversteer or understeer you could then change the characteristics of the damper to compensate for slip.
Jason.
Jason Watkins said:
(2) Ferrous particles suspended in the damper fluid, with a coil of wire acting as an electro-magnet wound around the inner damper tube, as you energise the coil you change the properties of the fluid. Maybe someone else can explain this in more detail but as far as I understand, it's kept fairly secretive by damper companies.
The principles are no particular secret; they're described fairly well on the links given by my first post and by UK_vette, above.Basically, the magnetic particles align with the magnetic field and in doing so change the apparent 'viscosity' of the working fluid in the damper, thus giving different resistance as it is forced through the internal valves by the damper piston.
factor in teh Bose suspension as well, radical stuff!
click for details
click for details
bose website said:
The Bose® suspension system includes a linear electromagnetic motor and power amplifier at each wheel, and a set of control algorithms. This proprietary combination of suspension hardware and control software makes it possible, for the first time, to combine superior comfort and superior control in the same vehicle.
I don't know for certain, but I suspect the stuff used in coaches and trucks is an air-suspension system like they use on some Range Rovers and on some railway trains. Rather than have a spring and damper, it is simply a very strong bag of air which can be pumped up or down to maintain the desired ride height, regardless of load.
If sensors detect that the front/rear/side is dropping too much, they add pressure to that side and reduce it at the other. Additionally, sensors on the steering wheel, accelerator, brake, and accelerometers can detect driver input and vehicle movement, and adjust the pressure almost before the vehicle body has started to move.
This is a postgrad info page, but it is a pretty good run-down on various systems http://www.brlsi.org/proceed05/postgrad0505.html
If sensors detect that the front/rear/side is dropping too much, they add pressure to that side and reduce it at the other. Additionally, sensors on the steering wheel, accelerator, brake, and accelerometers can detect driver input and vehicle movement, and adjust the pressure almost before the vehicle body has started to move.
This is a postgrad info page, but it is a pretty good run-down on various systems http://www.brlsi.org/proceed05/postgrad0505.html
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