f1. no ecu engine braking?

Wayn0r said:
didnt you watch top gear when hammond was in the renault car?

It takes no less skill imo to drive an f1 car as fast last year as it does this year.
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partially agree, but then, if you get to f1 standard, your pretty good, however, if you can just throw it into a corner, and foot on the floor on the way out of the corner, then you do loose the skill aspect. Skill is relative.
 
Demon said:
If the valves are electronically controlled, You can create quite a degree of resistance just using the air alone if you have full control over inlet/outlet valves..

I doubt they would want any fuel when over running, it's precious stuff!..
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Valves in F1 are not pnematically controlled with electronics, they just use an air spring rather than a coil valve spring

Presviously I imagine the ECU could control the throttle angle to retard speed right up to the threshold of tyre grip whereas now if the driver comes off the throttle totally the throttle closes and you get uber engine braking until the drive gives the car more throttle.
 
my dad used to have an old ford granada auto and coming of the gas it used to freewheel instead of engine brake, you could actually feel it give loose.
not sure if it was supposed to do that, but it did
so maybe this is what happens, when they come of the gas it disengages what ever creates the engine brake on the F1 cars.
 
cyclopopcicle said:
my dad used to have an old ford granada auto and coming of the gas it used to freewheel instead of engine brake, you could actually feel it give loose.
not sure if it was supposed to do that, but it did
so maybe this is what happens, when they come of the gas it disengages what ever creates the engine brake on the F1 cars.
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Auto's are very different.

Most RWD cars will lock the rears up if you downchange without rev matching whilst braking hard.
 
Wayn0r said:
didnt you watch top gear when hammond was in the renault car?

It takes no less skill imo to drive an f1 car as fast last year as it does this year.
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I think a lot of it (with TC) is having the balls to drive them flat out. They don't work properly at 60-70%.

Once you are used the speed and the force it can't be that hard. Maybe.
 
Engine braking:

I imagine on an F1 car there are loads of ways of controlling the amount of resistance that the engine provides.

Controlling the valve lift would make it harder for the pistons to suck in /push out air.

The throttle can be used to add to this effect.

I'm guessing that the big advantage of using this technology is that the stability of the car can be improved under braking as well as fuel/brake saving.

Maybe we should wait for NicktheMorse (sp?) to comment !
 
My focus controls engine braking :P

I think its a crappy IACV still trying to regulate the idle on over run so you can feels the engine braking more sometimes than others and the car generally has little resistance. Im not sure if they cut the fuel or the surging type feeling on overun is just the IACV opening more and allowing more engine into the engine.
 
what i mean is, when your at the level of skill these drivers are at, i very much doubt that any of the drivers that are in the field are going to be affected much by not having traction control etc now as you would hope they prefer it.

Unfortunately after only 7 cars finishing yesterday it appears i may have been wrong lol
 
They'll just change the brake balance a bit and they'll have to get used to it. No F1 driver won't be able to adapt to that.
 
when richard hammond drove that F1 car for top gear, they also demonstrated its party piece - they could make the engine play tunes by moving round the rev range using the ECU.
 
Jonnycoupe said:
Valves in F1 are not pnematically controlled with electronics, they just use an air spring rather than a coil valve spring

Presviously I imagine the ECU could control the throttle angle to retard speed right up to the threshold of tyre grip whereas now if the driver comes off the throttle totally the throttle closes and you get uber engine braking until the drive gives the car more throttle.
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Really? they can't vary even the lift/duration? I honestly assumed they would have fully actuated valves by now for ultimate variability.??

With a totally closed throttle, would it generate enougth engine braking to lock the wheels even though the valves are opening etc? surely not?
 
Demon said:
With a totally closed throttle, would it generate enougth engine braking to lock the wheels even though the valves are opening etc? surely not?
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My 1700cc crossflow with rally cam and twin Webers can lock them up going from 3rd into 2nd, I think it's about 10.5:1 compression. Much lower and nowhere near as wild as a F1 engine.
 
Demon said:
Really? they can't vary even the lift/duration? I honestly assumed they would have fully actuated valves by now for ultimate variability.??

With a totally closed throttle, would it generate enougth engine braking to lock the wheels even though the valves are opening etc? surely not?
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Yep

And Yep. Thats why the engine braking control system was developed... The engine would have more volume of air to keep 'stretching' on each intake stroke with the valves open but this is an ITB setup rather than plenum so not much difference in the volumes, either will cause lockup especially with F1 CR's
 
Jonny69 said:
My 1700cc crossflow with rally cam and twin Webers can lock them up going from 3rd into 2nd, I think it's about 10.5:1 compression. Much lower and nowhere near as wild as a F1 engine.
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Good point, I was somehow envisaging the situation where they are in the same gear, and just letting off the throttle.. don't know why I was thinking of that !.. after what you just said I remember my mini and 2 stroke bikes locking up when going down the box in a rush.. and of course race bikes use slipper clutches for that very reason!..
 
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