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What else can I help you with?
Most cars have a four-stroke engine with four or more what?
Valves
Why does a four stroke engine run cooler than a 2 stroke engine?
A four-stroke engine runs cooler than a two-stroke engine primarily because it has a more efficient cooling system due to its longer cycle, which allows for more complete combustion and better heat dissipation. In a four-stroke engine, the intake, compression, power, and exhaust strokes are separated, giving more time for heat to escape during the exhaust stroke. In contrast, a two-stroke engine fires once every revolution, leading to less time for heat to dissipate and often resulting in higher operating temperatures. Additionally, two-stroke engines typically mix oil with fuel for lubrication, which can also contribute to increased heat generation.
Four-stroke cycle engines are more fuel efficient than two-stroke engines?
Unless we are talking about big diesels - Yes.
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.
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.
How many valves per cylinder in a four stroke engine?
Four stroke engines must have at least 2 valves: one exhaust and one intake. Most modern engines are going to 4 valves per cylinder to allow the intake and exhaust strokes to be more efficient.
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 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.
Why four stroke engines are not used for marine propulsion?
They are - most inboard engines are 4-stroke. But as with land vehicles, you can get a smaller engine with 2-stroke (or more horsepower with a smaller engine) so the small engines like some outboards tend to be 2-stroke.
Compare four stroke and two stroke diesel engine?
The basic difference between a two stroke and 4 stroke engine are1. A 2 stroke engine is an internal combustion engine that performs a cycle inone revolution of the crank shaft(an up stroke and a down stroke of thepiston)as compared o twice that of a 4 stroke engine)this happens because a 2 stroke utilises its beginning of the compression stroke and end of the combustion stroke to perform simultaneously the intake and exhaust(scavenging) however a 4 stroke has dedicated intake and exhaust valves for this purpose.2. Due to the above point there comes several basic difference between their working and construction they aresince a 2stroke fires 2 times the 4stroke in same period of time hence it naturally have more power to weight ratio.emissions are more in case of a 2 stroke naturally because it has ports whichare not as efficient as valves in 4stroke engines but advancement in this field has made them both equally efficient.2 stroke engine can be used in any orientation as this is particularly important in application like chain saw hwever for 4 stroke its not possible until you do some modification which makes the design even more complex2 stroke engine don't last long since they are more open to wear and tear.Two-stroke engines do not use fuel efficiently,Two-stroke engines produce a lot of pollution
Which supplies more power a 4 stroke engine or 2 stroke engine?
2-stroke engines produce much more power than 4-stroke.
