still an interesting concept of having stored electricity to drive the supercharger while at the same time being able to start the engine quickly if the engine has "stop go" feature

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Remind me of Prius heat fluid pump which utilized electric pump instead of belt driven. But will the car battery become easier kong?

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Good concept tho. Interestingly, the same company is coming up with a electricity generator that is run by exhaust gases. Imagine you paid that with this electric supercharger, exhaust gas runs the electricity which powers the SC which gives the car more power which gives more exhausts that runs the electricity, etc.

Pretty neat concept.

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@wen..i think there is no free lunch.

1. although turbochrgd engine uses exhaust flow (flow is due to pressure difference), there is limitation at what flow the turbine (air compressor for turbochrgd) will work efficiently.

in other words, exhaust flow (pressure) must be well determined so that turbochrgd engine will work at best.

2. wear & tear will always be there, now or later.

3. either tubochrgd or superchrgd has its own pro&con.

i'm not that well versed in these types. hope diablo will explain more

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September 23, 2009 @ 6:03 pm

I thought Proton has resolved the torque dipping problem with the introduction of IAFM module in Campro engine. As for Campro CPS, its already a powerful engine, no IAFM module is required.

Unfortunately, they're some issues on the quality of these local car parts. Heck almost on all of Proton and (Perodua too) products! For as long it is manufactured by our good local vendors, Malaysians will never see the full potential of QC/QA products from them! Long live imported cars!

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nice lecture.

So, in essence, turbocharger is the free lunch?

Not all of us took thermodynamics class.

More frequent maintenance is needed on supercharged cars due to the extra wear and tear from the extra power?

Pardon my ignorance of the science.

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In principle it does not improve the engine's thermal efficiency, which hasn't improved much for decades.

Intercoolers simply improve volumetric efficiency further in addition to other benefits associated with lower gas temperatures.

Just remember the lessons in your Thermodynamics class.

There is no such thing as a 'free lunch'. Superchargers and turbochargers all consume energy from the engine to increase engine output.

Mechanical superchargers 'consume' some of the mechanical energy output from the engine. Parasitic losses. If electric, energy is stored before consumption but it's still consumed from the engine's mechanical output, via alternator to charge the supercharger battery.

Turbochargers in theory can improve the thermal efficiency of the engine, depending on application. This is because there are no 'parasitic losses'. It does not consume any mechanical output energy from the engine. In fact it recycles energy otherwise wasted as heat through the exhaust.

The turbo actually converts wasted heat energy(more than kinetic energy) from exhaust and turns it into useful mechanical work to force more air into the engine. Under certain conditions at constant rpm the turbo charged engine is more fuel efficient than it's NA equivalent producing the same power.

Electric supercharger simply allows more flexible boost control

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The problem now is the electric motor, how long can it last?!? Compare to mechanical which only need to be driven by a belt and pulley?

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Yes the downside is whether the engine/crankshaft/gearbox can withstand

the higher temperature generated = may hv to add an intercooler

,use only synthetic oils etc

Our start and drive habits hv2be changed too cos the supercharger needs

warming up but unlike a turbochager it does not need cooling down(no turbo timer req.)

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squeeze some ponies will take out some miliseconds in a sprint

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Getting all that power with the same capacity of the engine feels like somewhat "cheating"

May we be enlightened on the down-side of charging?

Higher fuel consumption?

More frequent maintenance?

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