Anti-knock sensor...I'm confused - BMW Luxury Touring Community
 
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post #1 of 3 Old Apr 12th, 2008, 10:58 am Thread Starter
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Anti-knock sensor...I'm confused

I was perusing a thread from last summer and this was a statement apparently from BMW:

"BMW says:
An important part of the BMW-K engine-management system is an integrated anti-knock system, which allows the engine to use a very high (13.0:1) compression ratio for optimum combustion efficiency without the worry of damaging detonation. Two sensors - one positioned between cylinders 1 and 2, the other between 3 and 4 -- detect knock and cause the BMS-K computer to retard ignition timing. As a result, this high-output engine can be run on a variety of fuels without damage; the main difference is the power output, which is greater with high-octane fuel."


I've read various posts stating the LT DOES NOT have knock detect sensors and I can't find anything in Clymers indicating they do have such sensors. Can someone clarify this for me and others that are interested. Thanks!!

Reido
K1600GTL...Blue Metallic
USMC 1971-1975
Ham Radio Call: W0FVR
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post #2 of 3 Old Apr 12th, 2008, 11:19 am
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Re: Anti-knock sensor...I'm confused

Quote:
Originally Posted by Reid
I was perusing a thread from last summer and this was a statement apparently from BMW:

"BMW says:
An important part of the BMW-K engine-management system is an integrated anti-knock system, which allows the engine to use a very high (13.0:1) compression ratio for optimum combustion efficiency without the worry of damaging detonation. Two sensors - one positioned between cylinders 1 and 2, the other between 3 and 4 -- detect knock and cause the BMS-K computer to retard ignition timing. As a result, this high-output engine can be run on a variety of fuels without damage; the main difference is the power output, which is greater with high-octane fuel."


I've read various posts stating the LT DOES NOT have knock detect sensors and I can't find anything in Clymers indicating they do have such sensors. Can someone clarify this for me and others that are interested. Thanks!!
The anti-knock sensor was introduced with the BMS-K engine management controller. This is for the new 55-degree engine used in the K1200R, S, GT and R-Sport. It is also used in the new generation 1200CC Boxers. The LT uses the older Motronic controller and does not have the sensor.

Randy Prade
Aurora, CO

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post #3 of 3 Old Apr 12th, 2008, 11:31 am Thread Starter
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Re: Anti-knock sensor...I'm confused

Thanks for the clarification, Randy. I was reviewing the fuel/octane threads. Too much snow on the roads to ride, so I'm riding vicariously through the site!!

Reido
K1600GTL...Blue Metallic
USMC 1971-1975
Ham Radio Call: W0FVR
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