# Brake Specific Fuel Consumption of 2-stroke vs 4-stroke

• 3375
• John Lloyd

## Which is more fuel efficient 2 stroke or 4 stroke?

Four stroke is more fuel efficient than two stroke because 2 stroke engine doesn't burn entire fuel. ... In a 2 stroke petrol engine, due to open ports the fuel efficacy is very low as compared to 4 stroke engines.

## Are 4 stroke engines more efficient than 2 stroke engines?

As far as efficiency goes, the 4-stroke certainly wins. This is due to the fact that fuel is consumed once every 4 strokes. Four-stroke engines are heavier; they weigh upwards of 50% more than a comparable 2stroke engine.

## How do you calculate brake specific fuel consumption?

The BSFC calculation (in metric units)

The conversion factor is as follows: BSFC [g/(kW⋅h)] = BSFC [g/J] × (3.6 × 106) The conversion between metric and imperial units is: BSFC [g/(kW⋅h)] = BSFC [lb/(hp⋅h)] × 608.277.

## Why is mechanical efficiency of 2 stroke engine higher than 4 stroke engine?

Compared to four stroke engines, two strokes are lighter, more efficient, have the ability to use lower-grade fuel, and more cost-efficient. Therefore, the lighter engines results in a higher power-to-weight ratio (more power for less weight).

## Why are 2 stroke engines banned?

Answer: Two-strokes left the market because they could not meet steadily-tightening EPA standards for vehicle exhaust emissions. ... A four-stroke engine has a separate piston stroke for each of the four functions necessary to a spark-ignition engine: intake, compression, power, and exhaust.

## Why are two stroke engines more powerful?

Fuel for a 2-stroke engine has a small amount of oil mixed into it. ... Because combustion takes place with each revolution of the crankshaft with a 2-stroke, this format puts out more power than a 4-stroke engine and the power has more instantaneous delivery.

## Which engine is best 2 stroke or 4 stroke?

The two stroke diesel engine is widely used as the the four stroke as it has more output power. however, the two stroke engine has high losses whether heat lose or unburnt gases. So, in comparison with four stroke which engine has the best performance.

## What are the advantages and disadvantages of a two stroke and four stroke engine?

Advantage and disadvantage of two stroke over four stroke cycle engine. Advantages: A two stroke cycle engine has twice the number of power strokes than the four stroke cycle engine at the same engine speed. For the same power developed, a two stroke cycle engine is lighter, less bulky and occupies less floor area.

## What is the formula for fuel consumption?

The following formula is used to calculate fuel consumption in litres / 100kms, the most commonly used measure of fuel consumption. (Litres used X 100) ÷ km travelled = Litres per 100km.

## What is the importance of specific fuel consumption?

But the amount of fuel used to generate that thrust is sometimes more important, because the airplane has to lift and carry the fuel throughout the flight. Engineers use an efficiency factor, called thrust specific fuel consumption, to characterize an engine's fuel efficiency.

## How do you calculate fuel consumption per hour?

Divide your average speed by the miles per gallon to find how many gallons per hour of fuel you're burning. In the example used here, 50 / 35 = 1.43 gallons per hour (rounded).

Boat Alternator Charging 4 Batteries 70 Amp Draw 50 Amp Charge
Can you charge a 4ah battery on an 2Ah charger?How many amps does alternator charge battery?What is the best amperage to charge a marine battery?Does ...
How can you guarantee that your rental car won't use unreasonably more fuel?
Why do rental car companies charge so much for gas?When you rent a car does it come with a full tank of gas?How much do car rental companies charge fo...
Oil in the cooling reservoir
If you notice oil is in your coolant, you should check the oil cooler first to see if it is cracked. Damaged Head Gasket: The head gasket is a rubber ...