0
How theoretically can calculate volumetric efficiency in diesel engines?
Wiki User
∙ 14y ago
1282kg/s
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Why is volumetric efficiency measured only for 4 stroke engines and not for 2 stroke engines?
The volumetric efficiency of an engine ( It's ability to breathe ) can be found by finding it's C.I.D. the mathematical formula for Cubic inch displacement is "Bore x Bore x Stroke x .7854 x The # of cylinders".
Is the purpose of Supercharger?
To increase an engines Hp/Tq, by increasing it's volumetric efficiency ( how much air/fuel is in the cylinder).
Why volumetric efficiency is used in four stroke engines only not for two stroke?
Volumetric efficiency is a figure associated with every engine, 2 stroke, rotary, 6 stroke, etc. it isn't as common to see VE used in 2-stroke topics because most builders these days use figures that are more useful for the tasks at hand. Volumetric efficiency is almost an implied thought or a sub-conscious topic; more of a task than a means.
Why efficiency of carnot heat engine is always greater than that of an actual engine?
The efficiency of a Carnot engine is theoretically always greater than that of an actual engine. The fact that it is impossible to build a thermodynamically reversable engine, which is one of the variables necessary to calculate its superiority to a real heat engine, makes the theorum practical for assessing a real heat engines efficiency only.
Machine that transforms heat into mechanical energy?
A ficticious heat engine that works at the maximum theoretical efficiency is called a Carnot engine. Real engines, that obviously work at a lesser efficiency, include the combustion engines found in cars.A ficticious heat engine that works at the maximum theoretical efficiency is called a Carnot engine. Real engines, that obviously work at a lesser efficiency, include the combustion engines found in cars.A ficticious heat engine that works at the maximum theoretical efficiency is called a Carnot engine. Real engines, that obviously work at a lesser efficiency, include the combustion engines found in cars.A ficticious heat engine that works at the maximum theoretical efficiency is called a Carnot engine. Real engines, that obviously work at a lesser efficiency, include the combustion engines found in cars.
What is the efficiency of a gasoline engine?
Gasoline engines have a 30% efficiency, as compared to a Diesel engine having 40% efficiency. COOL HUH
What is the difference between a 1 liter engine and 2 liter engine?
The two litre engine can theoretically "ingest' two litres of air and fuel mixture into its cylinders. The one litre engine will only be able to take in one litre. I say theoretically because there are many other things to consider when trying to fill the cylinders to maximium capacity. Intake manifold design, valve timing, number of valves per cylinder, intake port size, valve lift, duration and overlap to name a few. Most modern normally aspirated engines will be able to reach 70%-75% volumetric efficiency. Adding a turbocharger or supercharger could push the volumetric efficiency over 100% depending on boost levels.. You would be forcing more air into the engine than it could take in on its own. The more air and fuel you can squeeze into the cylinders, the more power the engine will produce.
What is the efficiency of wankel engine when compared to conventional engine?
the efficiency of the wankel engines is 38 % as compared to the inline or v line engines which holds only 21%.... I don't know where that guy got that information from, but it's pretty wrong if he's talking about fuel efficiency. Wankel engines are quite poor in efficiency, but when compared to inline engines that offer the same performance (powerful V8s) they will have similar fuel efficiencies.
When discussing engines the ratio of output work to input work expressed as a percentage is called .?
The efficiency of the machine.
Why are heat engines intentionally run at high operating temperatures?
better thermal efficiency.
How efficient is the combustion engine?
The efficiency of a internal combustion engine varies with size, speed range, compression ratio etc. Diesel engines use higher compression ratio and operate without throttle control, therefore their efficiency is higher than a equivalent Otto engine. Large marine (read ship engines) or stationary diesel engine: 50% Heavy duty diesel engines for marine, stationary and vehicle applications (trucks): 40% Light duty diesel engines (cars): 30-35% Gasoline engines: 20-25% + a few % for newer engines The numbers mentioned above are maximum efficiency, not pedal to the metal efficiency. Please note that the thermal efficiency of a engine will increase if the combustion chamber surface decrease(!). Higher revs leads to higher forces acting on the piston rings and therefore higher frictional losses, in other words: the mechanical efficiency decreases with increased speed.
What is mean by back up torque and when it applies?
Torque backup is generally applicable to low speed diesel engines which are primarily used for high torque applications like tractors and off highway vehicles. Generally torque backup is expressed in percentage Torque backup = (max Torque - rated speed torque)/rated speed torque in % This generally means how much the engine can be loaded when its rpm drops to max torque rpm. Usually all OEM try to give maximum backup torque from their engines. But it is limited by volumetric efficiency at lower rpm for NA engines and for TC engines it can be more.
