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Old 05-06-2004, 12:01 PM   #1
SubaruCO
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Question F1 Throttle Control - How does it work?

Came across this forum thread and although it comes up with some rather nifty ideas for throttle-less engine control it never really answers the question: How does F1 implement throttle control?

http://www.eng-tips.com/gviewthread....d/71/qid/93198

Note: This is before the new regulations which will mandate individual FIA approved bananas to plug the intake runners in order to limit power production!
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Old 05-06-2004, 12:03 PM   #2
StuBeck
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I believe its pretty much detects wheelspin at the rear, and then reduces the rev's to keep from spinning. Its probably a bit more complicated then that (making individual cylinders fire less or something) but that's the gist of it.
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Old 05-06-2004, 01:09 PM   #3
KoneKiller
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Doesn't BMW have a throttleless V8 in production? Variable valve timing and lift is the mechanism, if I remember correctly.

Some of the ideas about fuel cut in that forum are simply wrong. Only diesels can get away with that kind of mixture. Ford spend zillions on the PROCO motor in the 70's and 80's trying to do just that.
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Old 05-06-2004, 07:14 PM   #4
ellisnc
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Did someone say track day

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Anyone know if they're using sliding throttle plates or butterflies now?
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Old 05-07-2004, 11:55 PM   #5
chileewili
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BMW v8's in the e60 (new 7 series) and the e65 (new 5) don't use throttles, they use a mechanism BMW calls Valvetronic where the valve lift is infinitely variable and thus acts in place of a conventional throttle.
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Old 05-08-2004, 05:25 AM   #6
ellisnc
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Did someone say track day

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Didn't this thread start about F1 throttle control - not BMW road car engines?

Wonder if those are slide plates or butterflies

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Old 05-08-2004, 07:01 AM   #7
johnfelstead
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slide plate throttle assemblies are poor for airflow and unreliable. F1 engines and a lot of modern race engines use a rotating barrel throttle body assembly, so when fully open there is nothing in the airflow. The engines are fly by wire with the engine ECU choosing the optimum throttle opening based on demand and this is integrated into the gearbox, clutch and diff control systems. All the systems work together as a unit, so you cant think of the engine throttle control in simple terms anymore.
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Old 05-08-2004, 11:00 AM   #8
ellisnc
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Quote:
Originally posted by johnfelstead
slide plate throttle assemblies are poor for airflow and unreliable. F1 engines and a lot of modern race engines use a rotating barrel throttle body assembly, so when fully open there is nothing in the airflow. The engines are fly by wire with the engine ECU choosing the optimum throttle opening based on demand and this is integrated into the gearbox, clutch and diff control systems. All the systems work together as a unit, so you cant think of the engine throttle control in simple terms anymore.
Ahh makes sense... I know Honda changed from a slide throttle a long time ago because it was bad at part throttle. Good at WOT though just like the barrel you're talking about I can imagine. Any pics John?

Part of my job deals with DBW hardware and software on the cars we build so I'm well aware at least on our road cars how everything is integrated with the transmission logic and traction/stability control systems. F1 is probably more simple in some aspects and more complicated in others.
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