Quote:
Originally Posted by wwest40
The air within that vacuum OUTLET hose is COMPRESSED, and absent the ability to EXPAND somewhere "downstream" there would be NO FLOW.
So yes, turbocharging cannot, will not, be operational absent the ability for the compressed gasses exiting the cylinder to continue their EXPANSION.
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You're mixing words... the expansion you were originally talking about is heat expansion, and now you're talking about pressure expansion not caused by heat.
Yes, the vacuum is compressing the air at the inlet of the vacuum motor, which causes flow, which imparts kinetic energy to the turbine, which causes the turbo to spool.
There is no heat expansion there.
To compare this to an engine with no heat energy left at the bottom of its power stroke (which is what you're claiming happens in an Atkinson engine...).
You must simply think in terms of the power stroke being at BDC when the heat expansion is finished, and the piston
forcing the expanded gasses out of the cylinder. Therefore, there is still pressure and expansion occuring in the exhaust tubing.
Have we finished?