free hit
counters
Active suspension car - Esprit Chat - The Lotus Forums Jump to content


Active suspension car


Recommended Posts


Upgrade today to remove Google ads and support TLF.
  • Replies 36
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Sounds easy in principal, and yes, driving all the 'bits' would be relative childsplay, but doing it so it works properly not so easy. Creating a map of responses to all possible conditions from scrat

Looked at it the other day and still looks pretty tidy. The interior is all there with some of the original testing equipment too. 

Its easy to control via a PLC I would think. There are plenty of experts and software to write to PLC.  I got good friends at http://www.pandrhydraulics.com/ who Imsure could recomend someon

They had another active suspension car called S.I.D. that looked more like a Stevens in Silver, but it had a different chassis construction and large portions of removable body.  They almost sold it at auction years ago, and the guide had it valued at lik e£8k...!!!

 

http://www.lotusespritworld.com/EOtherstuff/sid2.html

http://www.lotusespritworld.com/EOtherstuff/sid.html

 

Project-SID-Esprit.jpg

Full_page_drawing.jpg

Travis

Vulcan Grey 89SE

My Lotus Photo and Projects Album

Link to post
Share on other sites

It was due to be sold at auction at Silverstone about 15-20 years ago along with the rest of the family silver but was withdrawn at the very last minute and so it's still at the Factory thankfully.

Link to post
Share on other sites

I had a magazine in the 80's that had a big article on the lotus active suspension program, i'm sure its in the loft. if I find it i'll scan it on here.

Amateurs built the Ark

Professionals built the Titanic

"I haven't ridden in cars pulled by cows before" "Bullocks, Mr.Belcher" "No, I haven't, honestly"

Link to post
Share on other sites

The black car was rescued by Brian Angus a few years back and tidied up a bit so it could be displayed in the office.

Not sure how much is left intact. The windows are blacked out but at least Brian managed to recover it from under a tarpaulin and make it fit to be on display!

Link to post
Share on other sites

The black car was rescued by Brian Angus a few years back and tidied up a bit so it could be displayed in the office.

Not sure how much is left intact. The windows are blacked out but at least Brian managed to recover it from under a tarpaulin and make it fit to be on display!

 

I may have had a little to do with this as I saw it in its sorry state and asked if I could buy it as it was too important to just be left to decay further.  After a while I was told no, its not for sale, but will be restored.

Link to post
Share on other sites
  • 2 years later...

Anybody interested in the other active suspension car, the Excel?

Purchased some items from the current owner so I was shown the car today. The system is there, hydraulics etc, but no electronic controller, which I'm told is a relatively simple thing to replicate now although not so 20-ish years ago. It's a blue car, cloth interior, faded paint and saggy headlining but nothing too major.

Link to post
Share on other sites

Fast Lane did an article on the Excel back in the day. I must have read it a millionty times. Fascinated. B-)

Link to post
Share on other sites
On 20 June 2014 at 20:02, GordonMasson said:

The black car was rescued by Brian Angus a few years back and tidied up a bit so it could be displayed in the office.

Not sure how much is left intact. The windows are blacked out but at least Brian managed to recover it from under a tarpaulin and make it fit to be on display!

Looked at it the other day and still looks pretty tidy. The interior is all there with some of the original testing equipment too. 

  • Like 1
Link to post
Share on other sites

What happened to the tech? I don't recall Lotus ever putting it into production, I'm guessing they may have sold the research to another manufacturer?

James Martin (JayEmm)
Director of Photography & Car Enthusiast

Follow my Lotus adventure online! www.jayemm.com

Link to post
Share on other sites

Grapevine said it was too power hungry. 

This is isn't an official statement, but it would make sense.

Link to post
Share on other sites
On 27/07/2016 at 18:39, andydclements said:

Anybody interested in the other active suspension car, the Excel?

Purchased some items from the current owner so I was shown the car today. The system is there, hydraulics etc, but no electronic controller, which I'm told is a relatively simple thing to replicate now although not so 20-ish years ago. It's a blue car, cloth interior, faded paint and saggy headlining but nothing too major.

I would have thought it would be a no-go without the controller. You would need to pretty much re-do much of Lotus research to be able to replicate the software in the controller. 

The value in the IP would have been in the controller which is likely why its not there.

Link to post
Share on other sites
22 hours ago, JayEmm said:

What happened to the tech? I don't recall Lotus ever putting it into production, I'm guessing they may have sold the research to another manufacturer?

James, I'm sure in one of my Lotus books it states that the Active Suspension is sold under licence to other motor manufacturers worldwide.

Link to post
Share on other sites
Just now, Royal said:

James, I'm sure in one of my Lotus books it states that the Active Suspension is sold under licence to other motor manufacturers worldwide.

Thanks Martin. It seems like far too good a tech for Lotus to have just canned it. Amazing to think this was 30+ years ago though, and I still can't think of many cars that really use it. 

James Martin (JayEmm)
Director of Photography & Car Enthusiast

Follow my Lotus adventure online! www.jayemm.com

Link to post
Share on other sites
22 hours ago, JayEmm said:

What happened to the tech? I don't recall Lotus ever putting it into production, I'm guessing they may have sold the research to another manufacturer?

James, I'm sure in one of my Lotus books it states that the Active Suspension is sold under licence to other motor manufacturers worldwide.

Ooops! re-posted by accident. James, I think BMW and Mercedes make use of it on their flagship models. I'll bet there are a few more besides.

 

Link to post
Share on other sites
10 hours ago, Andyww said:

Interesting, I kind of assumed this would be an ECU of sorts. Is there any documentation of the system anywhere?

I imagine a cross between an ECU and an ABS system, the size of a suitcase with at least 4 electronically operated actuators/valves per corner. To create a system capable of keeping the car flat through corners under vastly differing circumstances would be ROCKET SCIENCE. So if you're thinking about taking your Esprit ECU down to Powertech to be chipped to work the suspension, think again

Link to post
Share on other sites

I expect like running an old f1 car, the issue is not in finding a 1980s spec ECU but in finding a computer that can talk to a 1980s ECU!

James Martin (JayEmm)
Director of Photography & Car Enthusiast

Follow my Lotus adventure online! www.jayemm.com

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.




×
×
  • Create New...