Shinkaze
07-19-2004, 04:24 PM
Buried in a twelve page article on a rather boring motor (serriously under 300hp? Yea not interested)....however this has some cool implications for future Engine Technologies.
Link to page 3 of 12
http://www.germancarfans.com/news.cfm/newsid/2040718.001/page/3/bmw/1.html
http://www.germancarfans.com/news/2040718.001/2040718.001.Mini7L.jpg
http://www.germancarfans.com/news/2040718.001/2040718.001.Mini8L.jpg
http://www.germancarfans.com/news/2040718.001/2040718.001.3L.jpg
-Adam
Shinkaze
07-19-2004, 04:39 PM
...reading......Holy Shit this motor is cool. Temp Dependant electric Water pump, infinite variable valve timing to control throtle functions...there are no throttle butterflys on this motor...and Hydroformed Cams..... how neat is that?
From Page 5
Lightweight camshafts with a weight advantage of 1.2 kg.
With exception of the revolutionary composite aluminium-magnesium crankcase, the new lightweight camshafts are the largest single contributors towards the BMW R6’s remarkably low weight of 161 kg. By means of hydroforming it is possible to reduce the weight of each finished camshaft by 600 g (–25%). The basic component of the new camshaft is a steel tube that is pulled through the cam rings made of high-strength refined steel. The parts are placed together in a die and the tube is subjected from the inside to a water pressure of 4,000 bar. By this method the tube is brought into the desired wave shape in a cold state and pressed against the cams from the inside. Finally, the cams are accurately polished down to a 1 (1∕1000 mm) finish.
Each of these finished camshafts is 600 g lighter than a conventional camshaft. In the case of the R6 with its double overhead camshafts this means that the two camshafts alone enable a 1.2 kg saving in weight. BMW already used hydroforming in car manufacturing when producing the windscreen frame of the latest 3 Series Convertible. BMW further developed this technology, rendering it suitable for processing high precision parts such as camshafts.
Damn shame it only makes 260hp...