In the power stroke:
* PIE C is a good way to remember it. Or C PIE. *
In the power stroke:Intake stroke --- draws the fuel mixture into the cylinderCompression stroke --- pressurizes the fuel mixturePower stroke --- ignites the fuel and causes the product gases to push against the pistonsExhaust stroke --- expels waste gases from the cylinder* PIE C is a good way to remember it. Or C PIE. *
Why the fuel consumption is less in 4 stroke engine as compared to 2 stroke engine
The key features of the Yamaha 9.9 fourstroke outboard motor include its four-stroke engine design, which provides smoother and quieter operation compared to two-stroke engines. It also has a compact and lightweight design, making it easy to transport and install. The benefits of this outboard motor include improved fuel efficiency, reduced emissions, and lower maintenance requirements. Additionally, the Yamaha 9.9 fourstroke offers reliable performance and durability, making it a popular choice for boaters looking for a dependable and efficient outboard motor.
The displacement of an engine can be altered by changing the bore (the diameter of the cylinders) or the stroke (the distance the piston travels within the cylinder). Increasing either the bore or the stroke will result in a larger displacement, which can enhance engine performance by allowing for more air and fuel to be combusted. Additionally, modifications to the engine design, such as adding more cylinders, can also increase displacement.
The knocking of the engine is generaly due to the way the fuel is combusted, if the spark occurs to early or too late in the 4 stroke cycle then the power stroke will be more like an uncontrolled explosion rather than even burning of fuel, this can also occur when the fuel is being ignited from another source such as a (hotspot) in the cylinder, this could be carbon build-up on a valve that stays glowing red and ignites the fuel too early (before the sparkplug is due to spark) - called "detonation"
4 stroke fuel is straight petrol, it does not have oil in it! If you use it in a 2 stroke engine you will seize the motor. 2 stroke fuel has oil added to it.
what is the fuel and oil mixture for a kx 250, 2 stroke
The intake stroke, number one in a 4 cycle engine.
Fuel is fuel. The fuel only changes when you add 2 stroke oil to it. You can burn it in a 4 stroke engine, might smoke some, but it is not recommended for your normal outing.
In a gasoline engine, it is a fuel-air mixture that is drawn in during the intake stroke, unless the engine is fuel injected. In a fuel injected or a diesel engine, it is air, because the fuel (gasoline or diesel) is injected at the "last moment" before ignition.
Stroke length in an engine refers to the distance the piston travels within the cylinder. A longer stroke typically allows for a larger displacement, which can lead to more power generation, as it increases the volume of air and fuel mixture that can be combusted. However, it also can affect engine speed and efficiency, as longer strokes may limit the engine's ability to rev high compared to shorter strokes. Ultimately, the relationship between stroke length and horsepower is influenced by various factors, including engine design and tuning.
When comparing to a two-stroke engine, the four-stroke engine has the following advantages.Fewer emissions. Since the crankshaft has its own oil reservoir there is no need to add oil to the fuel, meaning there is no oil burned in the fuel.Better fuel consumption. The four-stroke engine complete a full cycle in four-stroke. This gives it greater control over which ports open at which times. On a two stroke engine, fuel and air is being forced into the cylinder while exhaust is being forced out, this causes some fuel and air to flow directly through the cylinder and out the exhaust. Four-stroke engines are also directly fuel injected which allows greater control over fuel delivery.Longevity. The four-stroke engine has a lower power to weight ratio than the four-stroke engine. In this respect, the engine components aren't pushed as hard as a two-stroke. This allows them to last longer.