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Originally Posted by Frank Lee
I saw nothing in the materials about the "how" of this reducing ring drag. Did I miss it?  |
no it was pretty vague . My interpretation is the problem is when piston speed reduces speed near TDC , where pressure is the most . When piston speed is fast like at 90deg mark the ring can "glide" over the oil film but near TDC piston is so slow it can't do that and wear kicks in .
I still have hard time thinking this is useful in small auto engines as they already last past rest of car .
On valvetrain I think something along F1 engines with either solenoid or air operated valves . This way you could electronically time them and have greater control .