4 Stroke vs 2 …

17 Янв 2015 | Author: | Комментарии к записи 4 Stroke vs 2 … отключены
Kawasaki Square Four 2 Stroke Prototype

Post by Premier Scooters on May 25, 18:49:52 GMT -5

Post by mainepeace on May 25, 18:56:33 GMT -5

The 2 … doesn’t produce more power per but since there are 2x the explosions to a 4 … at the same RPM, is more power put to the wheel. similar to how a Wankel or a rotary can apparently have 3x the power per inch versus a 4 …, but in it produces the same power per it just is more efficient in use of space. Parasitic drag valves and oil pumps do use up alot of

Also, the powerband for a 2 … is narrow, so they are always in powerband and the transmission is setup way. Similar to a diesel in that way.

Post by on May 25, 2011 18:58:15 GMT -5

Liz, to understand the mechanical between a two … and four engine, lets first how the four … engine try my best to explain everything as and clear as i can.,bear with my a descendant of Luke Skywalker,and is not my primary language, to begin,The strokes are:

Intake: The travels down the cylinder the intake valve is opened to a mixture of fuel and air to enter the chamber.

Compression: The intake is closed and the piston travels up the cylinder thereby compressing the

Combustion: The spark plug the compressed gas causing it to explode, forces the piston down.

The piston rises up the cylinder as the valve is opened, allowing the to clear the chamber to start the over.

Each time the rises and falls it turns the that is responsible for turning the This is how fuel is converted forward motion.

Of note here is that the plug only fires every other revolution. there is a sophisticated set of mechanisms in synchronization to create the four A camshaft must alternately tip a arm attached either to the intake or valve. The rocker arm returns to its position via a spring.

The valves be seated properly in the cylinder to avoid compression leaks. In words, a symphony of mechanical occurs.

In the two … engine, all events are integrated into one downward …, and one upward Two strokes. Intake and exhaust are integrated into the compression and movement of the piston, eliminating the for valves.

This is accomplished by an and exhaust port in the wall of the chamber itself. As the piston downward from combustion, the port is exposed allowing the gasses to rush out of the chamber. The … also creates that draws in new air/fuel an inlet located lower in the As the piston rises again, it off the inlet and port, compressing the at the top of the chamber.

The spark plug fires and the starts over. Significantly, the fires on every revolution, the two … its power advantage.

at the lowest point of travel of the when the chamber is filling fuel/air, the exhaust port above allows some to escape the chamber. This is seen with an outboard evident by the multicolored oil slick the engine, but it happens with all two engines. This — along burning oil — creates and fuel-efficiency issues.

For these reasons, two … are reserved for intermittent use, weight-to-power ratio or orientation are important and where mileage primary. Meanwhile manufacturers are for ways to add advantages to four motors, making them lighter and more robust.

To understand the difference between a two and a four … engine let us the advantages and disadvantages.

Advantages of the two

Has more get-up-and-go because it once every revolution, it twice the power of a four which only fires every other revolution.

a higher weight-to-power ratio it is much lighter.

Is less because of its simpler design.

Kawasaki Square Four 2 Stroke Prototype

Can be in any orientation because it lacks the oil of a four … engine, has limited orientation if oil is to be retained in the

These attributes make two engines very popular for a of uses from dirt mopeds, jet skis, and small motors, to lawn and garden such as mowers, edgers, blowers, chain saws and trimmers.

But there are other between the two … and four engines that aren’t so which is why you won’t see two … in cars.

Disadvantages of the two …:

wear and shorter engine than a four … due to the of a dedicated lubricating system.

special two … oil (premix) every tank of gas, expense and at least a minimal of hassle.

Heavily pollutes of the simpler design and the gas/oil that is released prior to, and in the (also creates an unpleasant

Is fuel-inefficient because of the simpler resulting in poorer mileage a four … engine.

Has a high-decibel whine that may legal noise limits in areas, depending on the product and applicable laws.

Before a two … product you might with your local to see if any restrictions apply.

if you support Al and the clean air act, don’t buy a 2 scooter..

Last Edit: May 25, 19:02:12 GMT -5 by ♣Luke♣


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