A long-stroke engine is an engine that has a smaller bore than its stroke. … For a given engine speed, a longer stroke increases engine friction and as a result, increases the stress on the crankshaft. ‘It’s because of the higher peak piston acceleration. A long bore engine, as the name suggests, has a longer cylinder.
What is the benefit of a long stroke engine?
If you have a longer stroke engine ,you increase the engine efficiency because of increase in the expansion ratio( but at the same time it will lead to high friction losses. Longer stroke engines are basically low speed engines. Short stroke engines have low friction losses and they are basically high speed engines.
Is short or long stroke better?
This doesn’t work well at low rpm but does at high rpm. That plays well in to the other factor. A bigger bore with a shorter stroke also allows an engine to rev higher, which creates more horsepower. Conversely, a long stroke is generally better for fuel efficiency, because it reduces surface area during combustion.
Does a longer stroke mean more torque?
Instead, long-stroke engines produce higher torque at lower RPMs. … However, less air-fuel mixture means quicker combustions at low RPMs, resulting in higher torque at low RPMs. Also, piston speeds are higher. Piston speed is the test of strength of the piston and connecting rod (conrod) subassembly.
What are the 4 types of strokes engine?
An internal-combustion engine goes through four strokes: intake, compression, combustion (power), and exhaust. As the piston moves during each stroke, it turns the crankshaft.
What is the disadvantage of super long stroke?
For a given engine speed, a longer stroke increases engine friction and as a result, increases the stress on the crankshaft. ‘It’s because of the higher peak piston acceleration.
What is better more torque or more horsepower?
Well, if you just want to go fast and hit 140 mph, then horsepower would be more effective for you. However, if you want a strong car that can pull boulders and take off quickly, a high torque might be more important to you. In short, torque makes your vehicle quick. Horsepower makes it fast.
What is are the advantage of super long stroke engine as used in main propulsion of a ship?
The smaller area leads directly to reduced in-cylinder heat transfer, increased energy transfer to the crankshaft and, therefore, higher efficiency. Power to weight ratio is more.
What is stroke length?
The stroke length is how far the piston travels in the cylinder, which is determined by the cranks on the crankshaft. … This number is multiplied by the number of cylinders in the engine, to determine the total displacement.
Which engine has more length?
Inline Engine: In this type, the cylinders are arranged in one line. The length of the crankshaft is longer than that of the other types of engines, hence a limited number of cylinders are used. In this type, better balancing and more uniform torque is obtained.
What are the disadvantages of an over square engine?
That’s why, oversquare engines generate more acceleration in the motorcycles. However, the downside of short stroke engines is their low torque due to short strokes and lower mileage. Oversquare or short stroke engines are used mostly in performance motorcycles for their ability to generate more power and acceleration.
Why are Undersquare engines more efficient?
Undersquare engines often exhibit peak torque at lower rpm than an oversquare engine due to their smaller valves and high piston speed limiting their potential to rev higher. Undersquare engines have become more common lately, as manufacturers push for more and more efficient engines and higher fuel economy.
Does shorter stroke make more torque?
Generally, for a given displacement, an engine with a tighter bore and longer stroke will generate peak torque at a lower rpm than one with a bigger bore and shorter stroke.
Is there a 1 stroke engine?
One-stroke internal combustion engines may comprise reciprocating pistons which are either straight or rotary. … Since four functions are performed simultaneously during one stroke, every stroke becomes a power stroke. In reality, 1-stroke engines are physically rearranged 4-stroke engines.
Is there a 3 stroke engine?
The three stroke engine does not exist in reality but according to the patent this cycle can be termed as 3 stroke. In real it is a 2 stroke engine. The term “three-stroke” indicates that, to quote from the patent, “total cycle displacement (of) the engine equals approximately three expansion ratios.
How do you tell if an engine is 2 or 4-stroke?
A 2-cycle engine has one fill port with a cap that has fuel pump and oil can icon. The cap will usually state the oil to fuel mix ratio. A 4-cycle engine has two fill ports with each cap separately identifying the fuel tank from the oil sump.