Vgrs
08-29-13, 06:59 PM
#2
http://www.caranddriver.com/features...eering-feature
Prime Cuts: Lexus Variable Gear Ratio Steering
We slice open the activist of active systems.
FEBRUARY 2012 BY TONY QUIROGA
The ability to change a vehicle’s steering ratio has many advantages. A quicker ratio (fewer turns lock-to-lock) can give a vehicle a deft feel. At high speeds, switching to a slower ratio (more turns lock-to-lock) imparts a better sense of stability. Lexus is not alone in using a computer-controlled system to change ratios, but its approach is pretty trick. Note that this type of active steering is far more involved than the variable-ratio units with rack teeth cut at differing angles; they can’t make ratio changes on the fly over the full range of lock. The more complex Lexus (and Audi) approach is essentially a gearbox built into the steering column between the steering wheel and the pinion gear. Unlike BMW’s active steering system, which employs a planetary gearbox, Lexus’s Variable Gear Ratio Steering (VGRS) uses something called a wave generator and a flexible gear. Lexus claims its system is more accurate and quicker acting than others. VGRS can be found on the LS sedan, the LX SUV, and the new GS F Sport. We sliced into the unit to get an idea of how it works and because we wanted to find out what a wave generator is.
We slice open the activist of active systems.
FEBRUARY 2012 BY TONY QUIROGA
The ability to change a vehicle’s steering ratio has many advantages. A quicker ratio (fewer turns lock-to-lock) can give a vehicle a deft feel. At high speeds, switching to a slower ratio (more turns lock-to-lock) imparts a better sense of stability. Lexus is not alone in using a computer-controlled system to change ratios, but its approach is pretty trick. Note that this type of active steering is far more involved than the variable-ratio units with rack teeth cut at differing angles; they can’t make ratio changes on the fly over the full range of lock. The more complex Lexus (and Audi) approach is essentially a gearbox built into the steering column between the steering wheel and the pinion gear. Unlike BMW’s active steering system, which employs a planetary gearbox, Lexus’s Variable Gear Ratio Steering (VGRS) uses something called a wave generator and a flexible gear. Lexus claims its system is more accurate and quicker acting than others. VGRS can be found on the LS sedan, the LX SUV, and the new GS F Sport. We sliced into the unit to get an idea of how it works and because we wanted to find out what a wave generator is.
08-29-13, 11:06 PM
#3
Your dealer doesn't know what he's talking about, or the lexus website is wrong:
http://www.lexus.com/models/IS/features/
http://www.lexus.com/models/IS/features/
08-30-13, 03:16 AM
#4
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Your dealer doesn't know what he's talking about, or the lexus website is wrong:
http://www.lexus.com/models/IS/features/
http://www.lexus.com/models/IS/features/
09-09-13, 06:56 AM
#6
09-09-13, 12:01 PM
#7
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09-09-13, 01:48 PM
#8
I'll probably wait for the mid-cycle refresh anyway but good to know many Lexus owners are quite helpful to fellow owners/prospective buyers.
09-09-13, 01:50 PM
#9
Damn Lexus Canada. I was told (here on this forum) that where I live, we cannot include any add-on and will have to stick with the option packages.
I'll probably wait for the mid-cycle refresh anyway but good to know many Lexus owners are quite helpful to fellow owners/prospective buyers.
I'll probably wait for the mid-cycle refresh anyway but good to know many Lexus owners are quite helpful to fellow owners/prospective buyers.
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