4-wheel steering Nissan 300Z

[HAULN-SS]

I was just wondering it this car actually exists...4 wheel steering I say, not all wheel drive. Some guy at my dad's work just bought a '91 300 TT, with 4 wheel steering..supposedly rare and one of the first cars iwth 4 wheel steering, if not the first

[Feersty]

Yup, Chapin's car had it, but he pulled it off. I forget the acronym though, NAIIS or something.

[HAULN-SS]

Wow..I'd never heard of it before..why would you need that? It's not like its an extremely long car or anything

[Feersty]

....presents the results of numerical simulation of two concepts of the steering system - a passive (2WS) and a four wheel steering one (4WS). A process of modeling of a vehicle behaviour going along the curvilinear path is described. A full, four wheel car model is used, which performances in time domain are shown. Non-linear relations of the friction forces are taken into consideration. A model of a driver enables two principles of motion: a lane change and a steady state cornering. The realisation of the 4WS control is proposed by means of a fuzzy logic controller. The purpose of this control is to minimise the side-slip angle at the centre of gravity, which finally improves the stability of a vehicle. The results of numerical calculation of a curvilinear motion of a vehicle with 2WS and 4WS steering systems are presented.

I am sure you understand all that jargon with all these crazy math problems you request us to solve. :lol:

[HAULN-SS]

Heh....that almost makes sense. The only line worth reading is "The purpose of this control is to minimise the side-slip angle at the centre of gravity, which finally improves the stability of a vehicle"


the rest is either bogus, or not presented correctly

[KPWSerpiente]

If the 300ZX Turbo's suspension was a crude DVD, it would be "Nissan Engineers Gone Wild." All Turbos came with four-wheel independent suspension, two-position cockpit adjustable shocks and Super HICAS four-wheel steering system, which tosses out a dose of opposite steering in the rear, immediately followed by same-direction rear steering.

Below 20 mph and above 75 mph, the system is inactive, but between 20 and 75 mph, it moves the rear wheels up to 1 degree, depending on vehicle speed, steering wheel angle, and the speed the steering wheel is turned. Turn the wheel quickly, and you get more of a response.

Until 1993, HICAS was electro-hydraulic, but for the 1994 model year, the system was changed to an electric rear rack for a small weight savings. Today, most die-hards disable it for track use.

The adjustable suspension had Sport and Touring settings. Additionally, the suspension geometry in the rear discouraged any squat at drag starts; in fact, it could produce a bit of annoying wheel hop. Stiffer lowering springs help.

What to look for

supposedly rare and one of the first cars iwth 4 wheel steering, if not the first

If by rare...you mean as rare as the car....sure. It is rare.

Not even close to the first passenger vehicle with 4 wheel steering.

-T

[JohnC]

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[Dave]

yeah, not exactly rare. I think most 300s had that feature. I think I remember John saying it was kinda creepy in high speed turns. I'm too lazy to click his link, but I'm sure he said why he got rid of it.