Have you ever?

[Engineer]

....ridden your WC very slowly on a level surface at tickover revs slipping the clutch over its full range? If so have you noticed the way the engine develops more power as the clutch lever is released to its full engaged position and how the engine power is reduced when the clutch if fully disengaged?

 

[mrtee43]

How would you know how much power the engine develops in either clutch position ?

 

[Nice 'n' Fat]

What MODE are you in?

 

[Engineer]

How would you know how much power the engine develops in either clutch position ?

you can here the revs rise very slightly and the bike pulls a little harder as you fully release the clutch (throttle closed) the revs rise as you let out the clutch lever and fall as you pull it in, counter intuitive?

 

[Engineer]

What MODE are you in?

road, dynamic, rain - I assume it is the same in all modes

 

[Shunt]

Just the electronics looking after you. The K1600's do it too. Reduces the chance of stalling it.

 

[Blackal]

....ridden your WC very slowly on a level surface at tickover revs slipping the clutch over its full range? If so have you noticed the way the engine develops more power as the clutch lever is released to its full engaged position and how the engine power is reduced when the clutch if fully disengaged?

How are you measuring the "power"? - or don't you know?


(do you see what I did - there? )

Al

 

[Mr K]

I fear for the future of motorcycling.

 

[Engineer]

Just the electronics looking after you. The K1600's do it too. Reduces the chance of stalling it.

Yes apparently so - I didn't realise this until yesterday - in order to do this then the engine management system must be able to detect the clutch lever position by using multiple switches or a potentiometer - interesting

 

[Engineer]

How are you measuring the "power"? - or don't you know?


(do you see what I did - there? )

Al

Are you some sort of weirdo stalker?

 

[Shunt]

Two switches on the clutch I 'fink

 

[Blackal]

Are you some sort of weirdo stalker?

I'm some sort of engineer...........

Not so sure - that you are, though............

Al

 

[Engineer]

Two switches on the clutch I 'fink

That all makes sense now - clever stuff, but kinda assumes that people can't use the throttle properly and need a bit of help but I guess that with all this computer assistance then BMW can optimise the fuelling even at very low engine speeds and compensate by tweaking the throttle just enough to keep everything running.

 

[Nutty]

Yes, I have. Oh hang on, no I haven't.

 

[Engineer]

I'm some sort of engineer...........


Al

Then you should know better

 

[Blackal]

Then you should know better

So - humour me...........

How does the engine "develop more power" exactly? All you've done is pull in and let out the clutch?

Al

 

[Engineer]

So - humour me...........

How does the engine "develop more power" exactly? All you've done is pull in and let out the clutch?

Al

Hmmmmm, not difficult with electronic control over the throttle and fuel injection is it? if you know the clutch position and feed that information to the engine management systen then one can easily control the throttle independent of the user (open the throttle a bit, more power) - that's what a fly by wire throttle can do, the engine management system can take over control from the rider.

might not have even to change the throttle position, change ignition timing slightly maybe, adjust fuel injection level maybe, tweak the butterfly open or closed a bit or all three????.

 

[Blackal]

Hmmmmm, not difficult with electronic control over the throttle and fuel injection is it? if you know the clutch position and feed that information to the engine management systen then one can easily control the throttle independent of the user (open the throttle a bit, more power) - that's what a fly by wire throttle can do, the engine management system can take over control from the rider.

might not have even to change the throttle position, change ignition timing slightly maybe, adjust fuel injection level maybe, tweak the butterfly open or closed a bit or all three????.

So - where is this extra power being dissipated? Again - all you have done is clutch in/clutch out.

You seem to be getting bogged down in electronicness..............

Al

 

[CPJS]

Some cars and vans do this as well, so nothing new.

 

[Engineer]

So - where is this extra power being dissipated? Again - all you have done is clutch in/clutch out.

You seem to be getting bogged down in electronicness..............

Al

OK try this, if you feed a signal into the engine management signal telling it to open the throttle a bit then it will do that, agreed?

if that signal comes from a switch on the clutch then you have clutch control over the engine output power, agreed?

If you have two switches on the clutch, one that switches just as the clutch is first pulled in a little bit and another that switches when the lever is all the way to the bar you have two signals to feed to the engine control system, agreed?

so when the clutch lever is all the way back to the bar one could close the butterfly a little (and/or tweak the fuel, timing etc) and the power/revs are reduced.

When the clutch lever is almost fully released then the other switch operates and you feed that signal to the control system and open the butterfly a tad and get slight more revels/power.

do you see now? maybe my explanation is not good enough but ask Shunt he knows how it works.