Hey,
I only have a fair rudimentary understanding of the technical side of F1,
but a video I stumbled upon got me thinking about the 2014 engine regulations relating to camshafts and valves. I had a read through and I all the references relating to them are about their dimensions, materials etc.
I remember towards the end of the V10 era, circa 2010, Renault were experimenting with electronically controlled, pneumatic intake and exhaust valves, thus not requiring a mechanical connecting to the crankshaft for timing, hence no camshaft.
In the video above, he makes some impressive claims (skip to around 4:00 for the really interesting stuff).
- Can handle high speeds (up to 20k if necessary).
- Infinitely variable timing - displays a graph showing the valve pausing when it is fully opened, claims can allow the engine to breathe better (sounds plausible for certain conditions, power/torque requirements).
- They have retrofitted a Saab wagon with their system, put 60,000km in testing on it, totally cam-less. He shows visually how much space this saves.
- Claims they've had performance gains tested by
AVL
- Up to 20% improvement fuel efficiency with the non-optimised retrofitted Saab (he claims they're expecting 30% when fully optimised).
- 30% more torque.
- 30% more power.
All just claims by a guy with a vested interest, but a serious company nonetheless and this technology is known to have been seriously considered (I believe Renault even got to the testing stage?) in the past by at least one F1 team. The Tech to make this feasible has likely have moved on quite a bit since the engines were last frozen.
It's probably nothing in terms of a possibility for F1 in 2014, but personally, being a programmer, I've always been frustrated that we still can't, or can but don't have a way to do away with the camshafts and timing belts in road cars. Essentially the mechanical link from the crankshaft to the camshaft seems like a heavy and limiting way to communicate timing information that could be done digitally with more control over the combustion process and less moving parts, space and weight.
But then again, I know very little about the technical challenges of designing independent valves with a powerful and accurate enough in it's physical response to input requests - not the sensing and data processing side of things needed to make this happen should be child's play for an f1 team, compared to other dynamic processes that require transistor time. Current vvti systems involves them being actuated in such a way already, but I'm assuming this requires only a fraction of the total valve movement, the rest of which is still controlled by the camshaft rotation and lobe profile?
With reports in the last month or so of the new engines supposedly going to be much more powerful than expected, I'm just wondering if:
a) this would be possible under the rules,
b) Has the technology improved enough since Renault looked into it?
c) Do you think this would benefit an F1 an engine enough to consider implementing it?
c) Would the potential space saving/packaging improvements be worth considering?
With so many changes next year, if this is within the rules and there are benefits, is it even the biggest challenge in terms of the new engines, the two types of energy recovery, electrically spinning up the turbo, can they charge the ERS completely and use the provision for unlimited recovered energy if it's sent directly from the MGUH to the MGUK for added power? (did I get that right?).
Apologies if the answers to these questions are self-evident, but curious minds...
Cheers.