The new Wärtsilä 31 is the most fuel-efficient four-stroke engine currently available on the market. The diesel version of the engine consumes on average 8–10g/kWh less fuel compared with the closest competitor across its entire load range. At its optimum point this number can go as low as 165g/kWh.
Which engine has highest efficiency?
The electric engine is most efficient. Electric motors are very efficient at converting electricity into work. Physicists throw around abstract numbers like 90%, whereas when discussing combustion engines, they use numbers less than 40%.
Which engine is more efficient and why?
“Diesel engines are more fuel-efficient and have more low-end torque than similar-sized gasoline engines, and diesel fuel contains roughly 10% to 15% more energy than gasoline. So, diesel vehicles can often go about 20% to 35% farther on a gallon of fuel than their gasoline counterparts.
Is IC or EC more efficient engine?
The internal combustion engine has an efficiency of about 35-45 %. As compared to the external combustion engine has an efficiency of about 15-25 %. The Fuel cost of the internal combustion engine is relatively high. As compared to the fuel cost of the external combustion engine is relatively low.
Which engine has more efficiency petrol or diesel?
Per litre, diesel contains more energy than petrol and the vehicle’s engine combustion process is more efficient, adding up to higher fuel efficiency and lower CO2 emissions when using diesel.
How many turns does a 4 stroke engine need to make a complete cycle?
Therefore, a four-stroke cycle requires two revolutions of the crankshaft. Figure 5-1 illus- trates each of the four strokes taking place in proper sequence. Figure 5-1A shows the piston traveling downward in the cylinder on the intake stroke. As piston moves down, the volume of space above it is increased.
Is it better to shift at high RPMs?
Nope it is not harmful at all. It doesn’t matter even if you shift at 1500–3000 rpm range or even 7k+ rpm. The only thing that will matter is the time the clutch is being engaged.
Is it better to accelerate quickly or slowly?
Speeding up too quickly.
That’s because the car’s computers know that gaining speed slowly allows the engine to operate most efficiently. Humans, by contrast, tend to want immediate results. So we floor the gas, flood the cylinders with that precious fuel, and burn up a lot more of it than needed.