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Old 03-13-2018, 02:19 PM   #21 (permalink)
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Originally Posted by Ecky View Post
I'm under the impression you'd get more power increase from an e-supercharger but in terms of total efficiency, it would be less than a straight e-assist.
I bet you are right. And an eAssist would be easier, if we go back to thinking just about practical EM bolt-on ideas. I have two vacant spots on my crank pulley from the delete of AC and PS. I could leave the stock alternator in place and add a small electric motor. The belts are prolly smaller than ideal but hopefully still useful with a properly small motor. That motor could maybe propel me around parking lots or extend glides. But that's not really the topic of this daydream concept general efficiency discussion.

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Old 03-13-2018, 02:21 PM   #22 (permalink)
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Originally Posted by California98Civic View Post
I bet you are right. And an eAssist would be easier, if we go back to thinking just about practical EM bolt-on ideas. I have two vacant spots on my crank pulley from the delete of AC and PS. I could leave the stock alternator in place and add a small electric motor. The belts are prolly smaller than ideal but hopefully still useful with a properly small motor. That motor could maybe propel me around parking lots or extend glides. But that's not really the topic of this daydream concept general efficiency discussion.
As a bolt-on solution for e-assist, you might choose to change the cam timing so it functions in the Atkinson cycle. A net gain in thermodynamic efficiency, increased engine load, and you still maintain adequate power down low. I could see a huge gain here for relatively little cost.

Last edited by Ecky; 03-13-2018 at 02:40 PM..
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Old 03-21-2018, 04:38 PM   #23 (permalink)
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Audi should be coming out with theirs this year. And ford will here in a bit as well. Basically the entire goal of echargers is to spool up faster to mimick a larger engine and allow a smaller engine to save on fuel (similar to how a hybrid uses its electric motors to allow a smaller engine).

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