Nissan develops Steer-By-Wire system

Posted on: Jan 30, 2013 - 10:17am IST

Steering feel and feedback are two things in a car that car nuts like us cannot compromise on.

Nissan Steer-by-wire technology

Most of the hydraulic power steering systems offer delightful feel but thanks to car makers’ never ending quest to improvde fuel efficiency, the electro-hydraulic steering systems came into place. It didn’t stop there, the steering systems now became pure electric.

Few EPS (Electric Power Steering) systems attempt to offer the enthusiastic driver the amount of feel and feedback he would expect but most of them inherently lack the communication. If that was not enough, Nissan has come up with a Steer-By-Wire system which eliminates the need of mechanical linkage between the steering wheel and the front wheels.

The Steer-By-Wire (SBW) technology is one of the plethora of electronic nannies that would find its place in a modern day car. The steering wheel is connected to electric motors through a set of three electronic control modules which according to Nissan would eliminate steering flex and lash thereby offering direct output on the road. In effect, the SBW isolates the driver from road impacts.

The steering wheel is connected to a steering force sensor (1) which sends commands to the control modules and feedback to the steering wheel. The column mounted clutch (2) engages if one of the three control modules (3) detect a malfunction. The engagement of clutch will establish a mechanical connection and the system acts as normal rack and pinion electric power steering.

The two assist motors (4) mounted on either side receives orders from the control modules and can infinitely vary steering ratio. The SBW system could also enhance the stability control system which otherwise relies only on individual wheel braking to stabilize the car.

Nissan’s new SBW technology is expected to make its debut in Infinity Q50 sedan.


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3 thoughts on “Nissan develops Steer-By-Wire system

  1. Mvk says:

    In short the “repairable” mechanical parts in a car is getting fewer. You just replace chips and electric motors.

    1. Nikhil says:

      True.. and hence expensive

  2. sandy says:

    Siemens in wheel electric motor-sock absorber-steering system was quite impressive followed by Michelin Active wheel technology. GM’s Hy-Wire concept car was quite futuristic. But Nissan’s technology for real use is quite impressive and can be installed on the present cars.


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About the Author
Nithyanandh K

As a toddler, those wheeled machinery fascinated me even before I knew what they’re called as! So here I'm, petrolhead by birth, Mechanical engineer by qualification and automotive reporter by profession!