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Re: ABS
"S.J.Metcalfe" <S.J.Metcalfe@domain.elided> writes:
>Rob <opus64@domain.elided> writes:
>>I believe most BMWs only have three-channel ABS, not four-channel.
>>Only four-channel systems independently brake all wheels. A
>>three-channel system like the one on my 328is handles the front wheels
>>independently and the back wheels as a pair.
>
>Would I be right in thinking that the 328i with ASC+T has four channel
>ABS? The ASC-T activates the rear brakes independantly to prevent wheelspin.
Good question! I just checked the tech info on the BMW web site, and
while the ASC+T entry supports what you say,
If necessary to achieve wheelspin control, it also acts on each
rear brake individually.
the section on ABS confirms what I said
BMW's system senses all four wheels individually, but
controls the two rear wheels as a pair.
If we trust both are correct, my guess is that BMW simply chose not to
update their ABS logic when they developed ASC+T.
Rob 328is w/ASC+T
opus64@domain.elided