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Old 29th December 2007, 18:23   #1
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Default Difference between MSR & ABS

MSR is a function that is shared between the brake system and the engine management systems. Is task is to prevent the driving wheels from locking up during engine braking. This could occur when the foot is quickly removed from the accelerator or when suddenly changing down gears. MSR prevents loss of steering control, due to slippage of the driving wheels, by increasing engine rpm, thus ensuring that the driving wheels do not spin and steering control is maintained. This sort of slipping is quite frequent when descending roads that are icy or snow-covered. Source:carpages.co.uk.

Anybody knows the difference between MSR and ABS?

Last edited by jerish666 : 29th December 2007 at 18:37.
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Old 29th December 2007, 19:12   #2
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Full form of MSR...??
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Old 29th December 2007, 19:17   #3
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Quote:
Originally Posted by kpzen View Post
Full form of MSR...??
Motor speed regulator.I want to know more about MSR.
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Old 29th December 2007, 20:12   #4
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Sorry Jerish. No idea about it. Let the gurus explain this.

Did some googling but all in vain.
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Old 29th December 2007, 20:28   #5
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Originally Posted by jerish666 View Post
Motor speed regulator.I want to know more about MSR.
Isn't this the Fabia thingy?
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Old 29th December 2007, 20:39   #6
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Sounds like some sort of onboard system that revv matches when you down shift, in order to prevent sudden change in wheel rpm due to engine braking.

Shan2nu
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Old 29th December 2007, 20:45   #7
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They are using MSR for Alpha Romeo, Fiat Bravia ,skoda Fabia.
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Old 29th December 2007, 20:59   #8
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no snows so not bothered about it.any way hearing this for the first time.may be a talk in the snowing region.does anything like speed governors to do with msr.

ram
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Old 29th December 2007, 21:58   #9
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Quote:
Originally Posted by Shan2nu View Post
Sounds like some sort of onboard system that revv matches when you down shift, in order to prevent sudden change in wheel rpm due to engine braking.

Shan2nu
If it revv matches when you downshift, won't that negate the engine braking??
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Old 29th December 2007, 23:01   #10
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If it revv matches when you downshift, won't that negate the engine braking??
When you revv match, it makes for a smoother downshift (minimum clutch friction) and a more even rate of deceleration.

MSR sounds like the kind of technology that might be found on automatic/paddle-shift cars. So while an ABS system acts after there is a wheel lockup, MSR prob sees to it that the vehicle never reaches a rate of deceleration which might cause the wheels to lockup, due to engine braking.

Shan2nu

Last edited by Shan2nu : 29th December 2007 at 23:07.
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Old 30th December 2007, 14:51   #11
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I think nobody knows what is MSD?
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Old 30th December 2007, 14:58   #12
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Quote:
I think nobody knows what is MSD?
MSD or MSR?

ABS only works when wheel lock-up is caused due to regular braking. MSR on the other hand sees to it that the wheels don't lock-up under engine braking.

Shan2nu

Last edited by Shan2nu : 30th December 2007 at 15:06.
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Old 30th December 2007, 15:46   #13
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sorry it is MSR.Thank you Shan.
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Old 30th December 2007, 17:16   #14
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OK, now I understand. Thanks.
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Old 1st January 2008, 11:30   #15
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MSR increases the throttle only when the system detects imminent wheel slip due to excessive engine braking. It shares the wheel speed and acceleration sensors with ABS. It does not reduce engine braking except in conditions where wheel lock/slip is beneficial like in soft snow and deep gravel. It is the nanny to engine braking as ABS is to wheel braking.

I personally prefer unassisted brakes (no servo, no ABS) on light 4x4s.
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