Date: Tue, 21 Sep 2004 23:08:33 +0200 From: "Marcel Baum" <bbmenospamat> Subject: Re: 280 Bhp in Saab 9-3 from next year.
"Everett M. Greene" <mojavegnospamveg.iwvisp.com> schrieb im Newsbeitrag news:20040921.79B61A8.B327nospamveg.iwvisp.com... > "Henrik B." <saabnospamPAM_tdcadsl.dk> writes: > > "Pooh Bear" <rabbitsfriendsandrelationsnospamail.com> skrev > > > > >> As I understood it, it's gonna be a Saab developed engine, which probably > > >> means chains. :o) > > > > > > As a newbie Saab ( 9000 ) owner I like the idea of chains. My previous > > > GM/Vauxhall ( also made as Opel ) Cavaliers ( Ascona / Vectra ) loved to > > > destroy timing belts just as you thought it was time to replace them ! > > > > I like chains too - and so does Saab. For the past 3 decades, the > > Saab-engines have had chains. Not until recently, when they started to use > > Opel engines (urgh!), did they get belts. But I'm sure new developed engines > > will have chains, as more and more carmakers use chains e.g. Ford, Toyota > > a.s.o. > > When might we see the electrically-operated valves? > This has been touted as the next great thing and > obviates the question about which kind of timing > "chain". I would expect pneumatically operated, electrically controlled valves first. They have proven to work quite reliable in F1 engines , even at very high revs, als long as you have pressure in your tank. And a tiny pump instead of the tank would solve this problem even in presence of small pressure leakages. Furthermore this would increase the power output of the engine by 10-20 Hp, since you will save the driving power for the entire valve train. > There's also been talk of a combined starter/alternator > incorporated into the flywheel, possibly operating at > 48V. When will this come to pass? > > Perhaps there should be electric all-wheel drive and > eliminate the power trains as well... Car industrie is about to turn back the amount of electronics you will find in our present "modern" cars. Electronic systems have significantly reduced the overall reliability of the car In the meanwhile you may find as much as 50 DC motors in a upper midclass car, many of them are processor controlled and tend to fail. In fact the only problem in my 91 9000 Turbo comes from the throttle motor system. It has allready been changed once, but the error causing the TCS light to turn on has returned. I am happy with it, since a permanent traction controll in a turbo engined car doesnt make sense at all. And in the 91 cars there was no way to override the TCS.