Guest English_Learner Posted September 3, 2006 Share Posted September 3, 2006 Hi there! what's: 1/ power density 2/ charge dilution 3/ engine breathing 4/ residual gas trapping 5/ fuel composition thanks :-) Quote Link to comment Share on other sites More sharing options...
Thorin Posted September 3, 2006 Share Posted September 3, 2006 4/ I had some this morning, had to open the bathroom window for a bit. Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 3, 2006 Share Posted September 3, 2006 4/ I had some this morning, had to open the bathroom window for a bit. Carefull ths is technical, you will get points:p Quote Link to comment Share on other sites More sharing options...
Guest English_Learner Posted September 3, 2006 Share Posted September 3, 2006 4/ I had some this morning, had to open the bathroom window for a bit. lol :- D I'm looking for a good explanation of the above-mentioned terms... Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted September 3, 2006 Share Posted September 3, 2006 They don't seem to mean much to us English speakers... are they American terms? Quote Link to comment Share on other sites More sharing options...
Digsy Posted September 6, 2006 Share Posted September 6, 2006 Hi there! what's: 1/ power density 2/ charge dilution 3/ engine breathing 4/ residual gas trapping 5/ fuel composition thanks :-) My best guesses: 1) Power density: Power divided by the engine size (also "specific power"). I.e 320bhp / 3 litres = 106hp per litre. 2) Charge dilution: Anything that dilutes the "burnable" fuel-air fixture on the induction stroke. For example: Blow-by gases and EGR. 3) Engine breathing: Could mean two things: (a) The intake and exhaust "gas exchange" process during the intake and exhaust strokes - that is, gas moving into and out of the comustion chamber. (b) The function of the crankcase ventilation (or breather system). 4) Residual gas trapping: Trapping residual (exhaust) gases in the combustion chamber, either intentionally by early exhaust valve closing (for "internal" EGR) or unintentionally through poor blow-down, reversion, big cam overlaps, etc. 5) Fuel composition: Not sure on this one. The chemical makeup of the fuel? Hope these help. Quote Link to comment Share on other sites More sharing options...
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