Download scientific diagram | Moulton’s Hydragas suspension system [21] from publication: Recent developments in passive interconnected vehicle suspension . Find great deals on eBay for mgf hydragas suspension. Shop with confidence. Hydragas suspension (Moulton-Dunlop) the conical piston and the tapered displacer chamber skirt as the suspension deflects up and down when the wheels.

Author: Vozragore Nigul
Country: Vietnam
Language: English (Spanish)
Genre: Science
Published (Last): 1 September 2012
Pages: 284
PDF File Size: 12.44 Mb
ePub File Size: 10.12 Mb
ISBN: 179-6-80389-633-7
Downloads: 62645
Price: Free* [*Free Regsitration Required]
Uploader: Voodoolmaran

These replace the conventional steel springs of a regular suspension design. These cars could have uncompromised damping which, with the wheel at each corner layout. I suggest that these cars will have the Issigonis layout of transverse engine and front wheel drive.

Hydragas Suspension

The original] Mini was the best-packaged car of all time this is an example of how not to do it. After the wheel motion of Figure 2a occurs and pressure stabilizes in the system, the larger area of the front piston causes a higher downward force on the front wheel than does the fluid pressure acting on the smaller piston area of the rear unit.

The combination of higher fluid pressures and increasing piston areas give the system a higher stiffness in bounce and roll than in pitch, possibly obviating the need to fit a front anti-roll bar [2].

I had heard of Alec Issigonis by reputation and we met socially before we worked together. The damping force vs.


The stiffness, or resistance of the system to such wheel motions, is clearly lower than it would be were the interconnection removed. The system thus has a progressive rate characteristic. Without this rising rate there would be no effective pitch resistance at all.

The upward motion of the front wheel in pitch displaces fluid to the rear unit, causing the rear wheel to exert an upward force on the car body.


Sufficient pressure differential between the upper and lower chambers compresses suspenskon the bump or rebound compression block, increasing fluid flow as a function of pressure difference. Interconnecting front and rear suspension units with fluid in pipes meant that the pitch mode was separated from bounce and roll.

Hydrolastic – Wikipedia

In pitch, as described above, fluid is displaced front to rear, and hence the pressure in the system stays effectively the same, and thus the suspension is much more compliant.

We then worked with Rover on the Minky 2, a one-off based on extended Mini sheetmetal that was essentially a test rig for a potential suspension set-up for their new car. This involved fitting a new front hydragae design,with a larger diameter horizontal chamber in the subframe. Figure 2b [2] depicts response in pure bounce or roll in which both wheels hydrgaas one side of the car move the same distance in relation to the body.

The displaced fluid passes to the displacer of the paired wheel, thus providing a dynamic interaction between front and rear wheels. While the Metro was praised for its handling, and offered a significant improvement in ride quality over the Miniit was criticised for its tendency to pitch and bounce on uneven roads – precisely the characteristics the interconnection was intended to remove.

BMC took a shareholding and paid all the costs of development. If we do find a defective unit fortunately this doesn’t happen very often we contact the hudragas straight away and give them the opportunity to send us another unit, if we encounter a defective unit there is no charge for that particular unit.

As a result, the car moved smoothly over a bump in the road, giving a much higher quality ride. The whole of the Midlands was committed to the new project. This article needs additional citations for verification.


Their suspension could comprise fore and aft fluid interconnection to separate pitch from bounce and roll. It was a great success, and Ford in particular were very upset by it. The lower diaphragm is composed of a sealing rubber layer atop a structural rubber layer.

The whole Mini racing thing was started syspension John Cooper. This left me free to work on the things I wanted to do. He gave us some insights into the development of the Car of the 20th Century – hycragas his opinion on the BMW Mini of the 21st century After the Second World War I was determined to move my family firm — Spencer-Moulton based at Bradford on Avon — from the manufacture of rubber suspension for railway coaches, and into automotive suspension.

This meant that, when the car cornered or went over a bump the suspension stiffened up as it was deflected. Contact Ian and Dawn on: Bernd Pischetsrieder, with whom I had had encouraging discussions left and the decision was taken that the new Mini should be wholly conventional in its suspension.

A special collar is then welded to the displacer, a high pressure Schrader valve is fitted and hydragqs unit charged with fresh Nitrogen to the original specified pressures, the unit is again thoroughly tested for fluid and hysragas leaks. Simultaneous upward front wheel and downward rear wheel motion not only positively displaces but also draws fluid from the front to the rear unit.