4-wheel active steer? please explain this to me

[shaba230]

looking to get into a 2007 g35 sedan, it has front AND rear wheel active steer as an option. It's a RWD sport model that i'm looking to get and I want to understand what exactly this is. Can you please help?

Thanks

[AJA]

This is from the G35 brochure ...

"Reacting to both steering angle and vehicle speed, this system alters the geometry of the rear suspension, slightly adjusting the angle of the wheelsl. The steering ratio of the front wheels is controlled by sensors that measure driver input and vehicle speed, providing improved response as well as road feel badck to the driver.Front and rear steering angles are precisely balanced to produce a natural steering feel."

[infinititech1]

when you are driving there is a g-force sensor in the car...and when taking turns at high speed and you reach a certain "g" the rear wheels will kick out a little bit the opposite way to help in the turn

[C-Kwik]

I haven't heard anything technically specific, but I would imagine it isn't much different than the Super-Hicas systems that many Nissans used in the past. Super-Hicas basically turned the rear wheels slightly towards the outside of the turn for a moment to help turn in. This effectively creates a rear toe-out situation. Then quickly transitioned to turn the rear wheels into the turn, effectively creating toe-in, which increases stability. Now keep in mind, these steering movements in the Hicas systems were no more than about 1 degree of movement. I'd imagine that's still the case.