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Nissan "Steer by Wire"

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Old Oct 18, 2012 | 04:57 AM
  #11  
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Originally Posted by lovegroova
Would it make 4WS an easier thing to engineer?
Good point. You could have the same steering rack at the rear, and rely on an ECU to control it all. And then you could have a button to press that would point all 4 wheels at 90 degrees for sideways parking.
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Old Oct 18, 2012 | 05:05 AM
  #12  
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Originally Posted by Dembo
Originally Posted by lovegroova' timestamp='1350564733' post='22091662
Would it make 4WS an easier thing to engineer?
Good point. You could have the same steering rack at the rear, and rely on an ECU to control it all. And then you could have a button to press that would point all 4 wheels at 90 degrees for sideways parking.
£20 says my missus could still kerb my alloys...
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Old Oct 18, 2012 | 05:08 AM
  #13  
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Originally Posted by Dembo
Originally Posted by lovegroova' timestamp='1350564733' post='22091662
Would it make 4WS an easier thing to engineer?
Good point. You could have the same steering rack at the rear, and rely on an ECU to control it all. And then you could have a button to press that would point all 4 wheels at 90 degrees for sideways parking.
Great idea barring the drive to the wheels issue!

Of course, Honda already had the 4WS steer with the Prelude and it was very good indeed.
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Old Oct 18, 2012 | 05:31 AM
  #14  
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Originally Posted by Ultra_Nexus
Originally Posted by Dembo' timestamp='1350565059' post='22091677
[quote name='lovegroova' timestamp='1350564733' post='22091662']
Would it make 4WS an easier thing to engineer?
Good point. You could have the same steering rack at the rear, and rely on an ECU to control it all. And then you could have a button to press that would point all 4 wheels at 90 degrees for sideways parking.
Great idea barring the drive to the wheels issue!

Of course, Honda already had the 4WS steer with the Prelude and it was very good indeed.
[/quote]

Electric motors in the hub, every wheel is independent and combined with 4ws you could turn the car in its own axis. Cool...
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Old Oct 18, 2012 | 08:41 AM
  #15  
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Originally Posted by GaryB
Nissan said that users would benefit from an improved driving experience since their intentions would be transmitted to the wheels faster than by using a hydraulic and mechanical system.
Their intentions transmitted to the wheels faster than mechanical systems?

Mechanical systems that directly connect the steering to the wheels? In real time?

Electric is faster than real time?

That's impressive.

Although given they use the word "intentions", do they assume that the steering could turn based on what we plan to do rather than before we move our hands?
It could also help if you hold the steering wheel straight, due to it not being connected it wont get pushed around in your hand on a bumpy road meaning the car reads you have the wheel straight, so holds the front wheels straight over the bumps rather than letting them get pushed left and right?
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Old Oct 18, 2012 | 11:03 AM
  #16  
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Originally Posted by GaryB
Originally Posted by Dembo' timestamp='1350565059' post='22091677
[quote name='lovegroova' timestamp='1350564733' post='22091662']
Would it make 4WS an easier thing to engineer?
Good point. You could have the same steering rack at the rear, and rely on an ECU to control it all. And then you could have a button to press that would point all 4 wheels at 90 degrees for sideways parking.
£20 says my missus could still kerb my alloys...
[/quote]



It's faaaaar easier to kerb the rears with 4WS, if you think about it. I think the Nissan 4AWS & Honda PAWS systems dispense with the easy-park facility, because most fine it harder to park with it! You can tie yourself in knots round the back bumper of the car in front, until you get the hang of it.

But yes, the principle of 4WS is essentially DBW; front and rear angle sensors, a speed sensor, a rate of steering wheel movement sensor and an algorithm to sort out the required input for the rear rack. A far cry from the clever mechanical 4WS of the 3G 'Lude! It wouldn't have been a massive leap to lob out the hydraulics in favour of an electric front rack, too.
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Old Oct 18, 2012 | 12:19 PM
  #17  
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How long till tuners offer to load you up the 911 feel steering program
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Old Oct 18, 2012 | 04:50 PM
  #18  
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Originally Posted by fluffyninja
How long till tuners offer to load you up the 911 feel steering program
Or they fit a smaller steering wheel.
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Old Oct 18, 2012 | 11:32 PM
  #19  
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Did SAAB not have system that was controlled by a Joy stick for steering, obviously a DBW system.

Now there are not an awful lot of aeroplanes flying around with FBW but we keep hearing of software problems etc with those, so what will happen when millions of Nissan's ( Incorporating Renault Electronic's ) hit the road, It just might like an evening on the dodgems at the local fair !!
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Old Oct 19, 2012 | 12:21 AM
  #20  
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Originally Posted by CHIPPO
Did SAAB not have system that was controlled by a Joy stick for steering, obviously a DBW system.

Now there are not an awful lot of aeroplanes flying around with FBW but we keep hearing of software problems etc with those, so what will happen when millions of Nissan's ( Incorporating Renault Electronic's ) hit the road, It just might like an evening on the dodgems at the local fair !!
Quantify what you mean by not a lot. All modern Airbuses are FBW and there plenty of them flying around. Last year they made up 64% of the market sales and since the year 2000 they have had made roughly the same amount of sales Boeing.

Yes there have been one or 2 high profile cases like the A320 chainsaw incident, but there are also plenty of incidents of 737s going down.

I have handled literally thousands of these aircraft and have never once encountered a FBW related incident.
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