Volumetric Efficiency

http://www.howautowork.com is the video source . this video talk about Volumetric Efficiency as an important factor for engine design and operation parameter,as the air enters the intake manifold, carburetor and cylinder.

Category:

Autos & Vehicles

Tags:

• carburetor
• design
• efficiency
• engine
• intake
• manifold
• operation
• parameter
• volumetric

[motorwolrdpl]

what is a natural aspirated engine??

[masterconcept]

thanks for comment,the natural aspirated engine is that no turbocharger or supercharger is used to force an extra air to enter the cylinder under the normal or natural operating pressure.

[XPLAlN]

Interestingly, the website this video plugs has a completely different definition of VE to the one presented in the vid itself! :- "Volumetric efficicncy is defined as the volume flow rate of air into the intake system divided by the rate at which volume is displaced by the piston".

[XPLAlN]

@dhiru6342 you are absolutely correct. If a 1 litre engine can suck in 1 litre of air it has 100% VE. What has been depicted on this video is actually compression ratio expressed as a percentage.

[dhiru6342]

Sorry the pictorial depiction is not correct. Vol efficiency is amount of air flow in the cylinder divided by the Swept volume (TDC vol minus BDC vol) during intake or suction stroke.

[abcfjfjfjfj]

@motorwolrdpl Running engine without using supercharger or turbocharge.

[gilessmokey]

sorry no. volumetric efficiency is about how well the cylinders are filled. if the cylinder is 200cc, is it getting filled with 200cc of air? or air/fuel mix if you must., that would be 100%volumetric efficiency.

[jkk20]

what i meant was volumetric efficiency .. and people often dont account for the fact that air isnt oxygen only .. its argon nitrogen co2 etc... and then some oxygen .. and those gases contain energy too ... compress them and ignite fuel and you get power ... its the expansion of gasses that do the work ... nothing else .. so even if you dont get a 100% clean burn you can still create lots of pressure by the rapid expansion of gasses

does this make sense gilessmonkey???

[gilessmokey]

@joeblob7 she knows what she is on about. it is not about the ratio of air in /out. it is how well the cylinder is filled.if you have small valves etc the cylider will not fill 100%. whereas if you use a blower you can fill a 1000cc cylinder with 1200cc air and achieve 120%VOLUMETRIC efficiency.

[gilessmokey]

@jkk20 false again....no diesel is in the high 60% THERMALefficiency

[gilessmokey]

@jkk20 false.... it is THERMAL efficiency that is about how much work you can extract from the fuel.

[kemardrakes]

This video is vague now as BMW has achieved 100+% VE on their N/A motors