The Best Way To Compare Engine Efficiency - BSFC
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- čas přidán 16. 02. 2021
- Brake Specific Fuel Consumption - How Massive Engines Can Be Efficient
Comparing Engine Performance: BMEP - • The Best Way To Compar...
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Brake Specific Fuel Consumption (BSFC) is a great way to compare the efficiency of engines. It's often referred to in units of g/kWh, (for example: 200 g/kWh) and represents the amount of fuel flowing into the engine versus how much power the engine actually makes. BSFC is directly correlated to the efficiency of an engine. The lower the BSFC, the more efficient an engine is.
In this video we'll define brake specific fuel consumption, show how it correlates with efficiency, look at a BSFC map, compare BSFC with RPM, air-fuel ratio, and engine size, and talk about ways of optimizing BSFC. We'll also look at how you can analyze the BSFC of your car engine if you have an MPG readout. This is helpful in determining what the best gear to be in for maximum efficiency.
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BSFC also helps explain why cylinder deactivation is a thing! For example, a V8 going down to four cylinders means those four cylinders have to make more power per cylinder versus eight cylinders. That puts them at a higher load, which is more efficient, and thus fuel economy improves during cylinder deactivation! If you haven't yet, I'd also recommend learning about BMEP, which is another great way to compare engines:
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My favourite profs in university taught the same way you do: Original notes written on the board. My least favourite profs made slideshows and talked briefly about each slide - leaving us to our own devices to really learn the material. Thank you for being such a great teacher.
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I started watching your videos 4 years ago. Now I’m taking an internal combustion class in college where we are calculating this and a lot of the other things you’ve talked about. Thank you for continuing to make these videos. I give you credit for convincing me to go to college by showing just how interesting this stuff is.
Would having a CVT tuned at BSFC as the shift point be the most efficient way to drive on an ICE car?
Have you considered spending some time teaching at an Institution of some kind? Your ability to articulate these complex ideas in a robust & simple way is immeasurably valuable. We need enthusiasts such as yourself, bringing forth excitement into otherwise boring fields. Thank you, as an academic, for your contributions. I am much more knowledgeable because of my Subscription to Engineering Explained
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It is pretty amazing how efficient over the road trucks and trains are in how much weight they can move per unit of fuel.
You know what they say: "there's no BSFClacement for displacement"
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I'm always impressed with how much I learn from your videos. Keep being smart.
hey man, just letting you know i enjoy your videos and theyre really informing and helpful
Thanks, Jason. Explained and illustrated so very well! Cheers!
Man sometimes i feel like youtube does not do justice for your talent, the way of your explanation and your knowledge is epic love your videos thanks for making these videos so that people like me gain ton of knowledge 😁
Fantastic explanation. Thank You!
As always thanks for these informative videos. I suggested a few times a video explaining the reason for the different placements of brake calipers between different cars but also between front and back brakes of a same car. Plus the difference between standard calipers and the new 10 piston calipers seen on recent Porsches and whether it really makes a difference. It would be nice if you could explain this. Many thanks
Good timing, we were introduced to BSFC in uni yesterday, great video.
This is great! I always struggle to explain why my boat's two 454 engines aren't as inefficient as they seem at first. More POWAH!
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