09-16-2011, 12:39 PM | #23 | |
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09-16-2011, 01:19 PM | #24 | |
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09-16-2011, 01:47 PM | #25 |
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This is from the M5 section (page 39) of BMW's media information kit from the Frankfurt show:
Hydraulic rack and pinion steering with variable transmission, which combines precise directional stability with reduced steering effort when manoeuvring, is an M-specific feature. Using independently configured M Servotronic, the characteristics of the speed-dependent power steering can be individually set via three accessible characteristic maps. See the whole information kit attached. Last edited by hinckley; 09-16-2011 at 02:00 PM.. |
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09-16-2011, 02:19 PM | #26 |
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Excellent news, let's hope that someone influential from BMW UK takes note and amends the published specifications accordingly.
There is, however, a bit of doubt remaining in my mind - yes, as another poster commented, I too cannot see BMW producing the M5 with two different steering systems, but you never know with our current eco friendly government and there's a nagging thought that there's an aspect of RHD that conflicts. Doubtless all will be revealed in the fullness of time. |
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09-16-2011, 07:58 PM | #27 | |
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09-16-2011, 10:59 PM | #28 | |
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09-17-2011, 05:48 AM | #29 |
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The electric motor imparts rotary motion to the pinion, which then moves the rack laterally. However, the motor requires an input from the steering wheel, via the computer/control unit, hence a very slight delay in reaction time. This, as I have previously mentioned, does not happen with a hydraulic system as the motive force, in the form of pressurised fluid, is constantly on-tap.
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09-21-2011, 05:52 PM | #30 | |
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BMW's updated press release confirms the hydraulic steering once again:
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09-22-2011, 11:33 AM | #31 | |
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09-22-2011, 11:47 AM | #32 | |
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10-05-2011, 06:39 PM | #33 | |
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The electric motor only acts on the shaft to give it assist. If you removed the motor, you'd still be able to turn the rack, unassisted. |
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