Have a look at the attached article regarding flame speed of various fuels in laminar vs turbulent combustion .
The diesel “knocks” due to the rapid flame speed .
To improve the mechanical efficiency of the reciprocating ICE . The less combustion chamber pressure BTDC the better . And the closer to ATDC that combustion completely occurs and combustion chamber pressure peaks due to heating of the gasses, the better.
Combustion occurring with the piston halfway down the cylinder borie vs when combustion occurs during the first 10-20 greees of crankshaft rotation is very inefficient. More heat lost out through the cooling system , the crank angle is less efficient and there is less degrees of rotation for the pressure on the piston to exert force on the crank.
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Today's Featured Article - On the Road with Dave Gohl: Auction Musings - by Dave Gohl. I was thinking the other day about all the auctions I've been to in the last few years. There've been many. Some have been very good, some have been well, disappointing to say the least. But no matter how good or bad auctions may be, we always seem to stay until the item we've come for or are interested in is on the block. I've been to some auctions near and far. I think the furthest has been the Two Cylinder 7 in the Amana Colonies last year. Lots of stuff, lots of people. I've also atten
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