Footballfan Posted February 29 Share Posted February 29 https://www.msn.com/en-us/money/companies/ford-patents-potential-ice-saving-technology/ar-BB1j2nYo?ocid=msedgdhp&pc=ENTPSP&cvid=1e1aedb1cb27487a8befde80194c9420&ei=7 Quote Link to comment Share on other sites More sharing options...
7Mary3 Posted February 29 Share Posted February 29 Well, that's a pretty minor reduction overall. It's just a different approach to managing EVAP and PCV. Remains to be seen if it would have any effect on intake valve deposits. Many are under the mistaken impression that intake valve deposits are primarily caused by blowby and crankcase vapors. Actually in modern engines the deposts primarily come from exhaust blown back up the intake port. Engines that do not have EGR valves use variable cam timing to accompllsh EGR by opening the intake valve early during the exhaust stroke. This blows a small amount of exhaust through the open intake valve into the intake port where it's drawn back into the combustion chamber during the intake stroke. The exhaust is hotter than the intake valve, so you have a condensing effect which causes the deposits to form on the port side of the intake valve. Of course port fuel injection does a good job of cleaning the intake valves, but I question if this new system would pass enough fuel vapor through the port to clean the valve at all. Quote Link to comment Share on other sites More sharing options...
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