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Why does two stroke engine pollute air more than a four stroke engine?
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Why two stroke engine not used in aircrafts?
In the two stroke petrol engine as you know suction,compression,ignition,expansion and exhaust is completed in only two stroke and one revolution of crank wheel more over diesel ignites at very high pressure which is not the same in case of petrol........if petrol is also ignited under pressure it explodes producing a big thumping sound.called KNOCKINGthis may reduce the power output and also lead to breakdown of the engine. For the above reason two stroke engine cannot compress air and ignite the fuel like diesel engine.
A steam engine is an example of an?
An external combustion engine. It's also an example of an engine that will start itself (no starter motor required if it's the piston type rather than a turbine). It's also an example of an engine that has more torque when its running slowly than when it speeds up (if it's the piston type rather than a turbine).
Compression ratio of the internal combustion engine is defined as?
The compression ratio of an internal-combustion engine, or an IC engine as it is more commonly called, is the ratio of the volume the highest capacity of the combustion chamber to its lowest capacity. In the IC engine, the piston makes a stroke, resulting in the compression of the air in the combustion chamber - the ratio between the volume of the cylinder and combustion chamber when the piston is at the bottom of its stroke, and the volume of the combustion chamber when the piston is at the top of its stroke, is the compression ratio.
Why are only two stroke and four stroke engines possible?
Two and Four Stroke EnginesPartially because of the way things are counted. Up and Down count as two, so it's pretty well impossible to have an odd number. That means the bare minimum is two, i.e. there is a power stroke every time the piston goes up and down. The next practical option is to have a power stroke every other time the piston goes up and down, i.e. the four stroke. The extra two strokes are used to more efficiently clear the exhaust gasses from the cylinder and cut the waste of unburned fuel that escapes to the exhaust system. Nobody has ever figured out a practical reason why you would want to have a power stroke every third time. What would those other strokes accomplish? wankel made an engine which is now in the Mazda rx8 which is a rotary engine,in which the piston rotates,rather than go up and downAlso a rotary has not got a piston it has a ROTOR that ROTATES around a bore.(like a block in a 4 or 2 Stroke) a rotor has 3 sides that pass a intake port, a sparkplug chamber and an exhaust port.
What is power stroke?
a power stroke is a engine that has been installed in ford pickups starting with the F:250 and up to the 650 it is way better than a durmax it has way more power and also albert has one it is a beast so peole buy the power stroke don't belive that todd kid
Two stroke engines pollute the air more than four stroke engines?
Yes, two stroke (or Two cycle) engines have oil that is mixed into the fuel to lubricate the motor's moving parts. Where as, in a 4 stroke engine the oil is separate from the fuel. When the fuel oil mix is burned in a two cycle engine more pollution is given off.
Most cars have a four-stroke engine with four or more what?
Valves
What is a 4 stroke outboard?
Combustion piston engines can have two different work cycles, 2-stroke and 4-stroke. 2-stroke tends to have a better power to weight ratio, but pollute more. A 4-stroke outboard is simply an outboard engine that works the same way as a car engine.
What is more efficient a four stroke engine or two stroke and why?
The most efficient to date is a 2-stroke design. it is a turbo desiel 2-stroke. but normally a 4-stroke is usually the more efficient of the two engine types.
Is four stroke and four cycle the same thing?
Yes, "four cycle" and "four stroke" are the same. The two terms may be used to describe an engine. As a rule, the term "four stroke" is more commonly used.
Why do 4 stroke engines have replaced 2 stroke engines?
A 2 stroke engine requires you to mix 2 cycle oil in with the gasoline. This requires more money, and it is much more trouble to have oil with you every time you fill the gas tank up. A 4 stroke engine only requires oil in the lower part of the engine, and it burns gasoline right out of the gas station pump. 2 cycles also pollute very bad, as the blue smoke that is a characteristic of them is bad pollution.
What is the difference between a two stroke dirtbike and a four stroke?
A 4-stroke will run quieter and cleaner. It will rev lower. For a given engine power it'll be heavier and bigger. For a given engine power it'll use less fuel. The engine will need more parts and be more complicated 4-strokes generally have better torque at low revs. A 2-stroke will run noisier and pollute more, It will rev higher, for a given engine power it'll be smaller and lighter. For a given engine power it'll use more fuel. The engine will consist of fewer parts, and be a simpler design. 2-strokes generally have less torque at low revs but do better at high revs.
Why do most very small engines operate on 2 stroke?
Most small engines are two stroke because you can get more power from a smaller engine with two stroke rather than a four stroke engine. It takes less to cool and to operate the engine.
What makes a two stroke engine produce twice as much power as a four stroke?
A 2-stroke engine makes power every2 cycles were a 4-stroke makes power every 4.Hence 2x power. This is absolutely INCORRECT! A two stroke engine develops it's PEAK horse power twice as fast as a four stroke for the reason given but that is it. For a given displacement a four stroke engine will ALWAYS make more torque and horsepower than a two stroke engine of equal displacement. This is due to the fact that a four stroke engine cleans the cylinder of contaminated (exhaust) air, compresses the air/fuel to a more efficient level, and draws a cleaner air/fuel mixture into the cylinder as there is no slow burning, air/fuel mixture contaminating oil mixed in the combustion charge. I have over forty years experience working on engines, and can tell you, the ONLY reason two stroke engines have lasted this long, is due to the fact that they weigh less than an equivalent horsepower four stroke engine. If they DID develop more horsepower, the four stroke would not have become the standard internal combustion engine used in transportation, generators, air compressors and the like.
What is the difference in combustion in a 2 stroke engine and a 4 stroke engine?
2 stroke means it takes two strokes for a power stroke and 4 sroke takes four strokes for power stroke so in otherwise 2 strokes are way faster and more torqey
Why 4 stroke engine is easy to start than 2 stroke?
A four stroke engine contains a lot more rotating parts. Four strokes contain one or more camshafts, cam gears, and a timing chain. All of which cause more rotating resistance (mass) than a two stroke has. A two stroke has none of these rotating parts, therefore, it rotates more easily when kick starting. Also the two stroke fires (sparks) twice as often (per revolution), than a four stroke, doubling your chances of getting spark (ignition) during the kick starting process.
What does stroke mean for quad bikes?
Stroke refers to how the pistons move in the cylinder(s).The basic meaning is the length of the piston travel. Short stroke engines can turn over faster, but long stroke engines tend to have more pulling power.Stroke can also be used as 2-stroke and 4-stroke, which refers to the different work phases of the engine. 2-strokes give more power for their size, but they pollute more and often use more fuel. 4-stroke can be cleaner, but bigger, heavier, and have more parts.
