Quote:
Originally Posted by RedDevil
So, P&Ging does help me overcome the Insights inefficiency at the low revs&low load combination.
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Just as P&G can help and be a + ... when it is able to increase the average efficiency of the ICE more so than the non-P&G average ICE efficiency would have been at the same average speed ... with a bit more additional ICE efficiency gains needed to over come the aerodynamic penalties for the speed fluctuation of the P&G.
Quote:
Originally Posted by RedDevil
P&G at highway speeds is useless in the G2.
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Principles are the same ... fast , slow , or any speed.
% variation causes the same % of aerodynamic penalty at any driving speeds.
The increased difficulty many P&G users run into at faster speeds ... is how much more ICE efficiency can be gained at higher average speeds and higher average loads ... there are limits ... the ICE has a best case max efficiency.
If the ICE steady state is already operating at peak ICE efficiency ... the only way to improve MPG is by improving the ratio of ICE efficiency and energy consumption ... ie reduce the consumption more than you reduce the ICE efficiency... some of that can be smarter driving ... or just driving at a slower average speed.
You can't see a net MPG gain , if the P&G extra aerodynamic penalty is equal or larger than any remaining possible gain in ICE average efficiency for the same average speed.
Quote:
Originally Posted by RedDevil
if you first drain the battery the FE when the ICE finally kicks in is not.
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Just like P&G there are + and - aspects with the HEV system.
It is not a + all the time used in any method ... neither is P&G.
The right tool for the right task.