quote:Given that you are not required to have an electrician's license to repair appliances, how can someone conclude that you'd be required to have an electrician's license to repair a car just because it has a 42-volt electrical system? It's a car, not a dwelling. Well, for most people, it's a car. For some, it doubles as a dwelling, but they're still not required to get a building permit to make modifications to it..
Originally posted by oilyriser: There's an interesting comment on that page about 42V electrical systems and that you'd have to have an electrician's license to work on one.
quote:Google shows a bunch of articles on that engine.
Originally posted by tom slick: I believe that caterpiller developed a camless engine a several years ago. the idea being that it could adjust for max power/effeciency under all operating conditions. I don't know where the project is now.
quote:the biggest hurdle to an efficiant ic engine is reclaiming the (now) wasted heat.
Originally posted by Kestas: I've always looked at infinitely variable valve timing as one of the last hurdles to achieve maximum efficiency from a piston engine. We've already optimized the spark and fuel delivery to a high level. VVT will go far in making an efficient engine. One other design concept to maximize engine efficiency is variable compression ratios. But I personally don't care for this technology... it adds too much complexity to the engine.