Stroke refers to the link through which the engine work cycle passes, four-stroke refers to four links, and the corresponding two-stroke passes through two links. The main difference between a four-stroke lawn mower and a two-stroke is that the four-stroke engine is more complex in terms of structure, the two-stroke performance is better under the same conditions, and the two-stroke engine is lighter in weight, the manufacturing cost is low, the failure rate is lower, and the four-stroke engine is relatively quiet. The advantages of four-stroke lawn mowers are high efficacy, good efficiency, and soil and water conservation. Let's take a look at the relevant knowledge.
What is a four-stroke gasoline lawn mower
The four-stroke gasoline lawn mower refers to the engine crankshaft of the lawn mower every two weeks to complete a working cycle through four strokes of air intake, compression, work and exhaust, while the corresponding two-stroke lawn mower only needs one rotation of the crankshaft and two strokes to complete a working cycle. A four-stroke differs from a two-stroke in terms of powertrain.
The difference between a four-stroke lawn mower and a two-stroke
1. Structure
From the structural point of view, the structure of the engine of the two-stroke lawn mower is relatively simple, mainly composed of cylinder heads, cylinders, pistons, piston rings and other parts, and there are air intake, exhaust and ventilation holes on the cylinder body; The opening and closing of the air holes is determined by the position of the piston. Compared with the engine of the four-stroke mower, there is no complicated valve mechanism and lubrication system, and the cooling system is generally air-cooled, which is greatly simplified in structure.
2. Performance
When the crankshaft speed is the same, the engine of a two-stroke lawn mower does twice as many times as a four-stroke engine for work per unit of time. Theoretically, the power of the two-stroke engine should be twice that of the four-stroke engine (but in fact it is only 1.5~1.7 times), the engine has higher liter power, better power, and less vibration of the engine. In addition, the two-stroke engine is lighter in weight, less expensive to manufacture, lower in failure rate, more convenient to maintain, and more convenient and flexible to use.
3. Applications
Four-stroke engines are more widely used, and the vast majority of automobiles and construction machinery are equipped with four-stroke engines. Two-stroke engines, on the other hand, are more commonly used in situations where the thrust-to-weight ratio is important. For example, lawn mowers, chain saws, model airplanes, agricultural machinery, etc. If you're harvesting softer crops, it's a good idea to use a four-stroke mower for neater and easier use.
4. Noise
While both types of lawn mowers are noisier, four-stroke mowers are comparatively quieter than two-strokes.
Advantages of a four-stroke gasoline lawn mower
1. High efficacy
Generally, each four-stroke gasoline lawn mower can mow more than 8×667 square meters of grass per day, and its effect is 16 times that of manual weeding.
2. Good benefits
Due to the fast rotation speed of the lawn mower, the cutting effect of orchard weeds is good, especially for the weeds with high tenderness. Generally, weeding 3 times a year can basically meet the requirements of weeding.
3. Maintain soil and water
Artificial hoeing and hoeing, because the topsoil is loosened while hoeing, it often causes a certain amount of soil erosion, and manual hoeing on the ladder will cause more serious soil erosion. The use of lawn mowers for weeding, because only the above-ground part of the weeds is cut, has almost no effect on the soil surface, and the soil fixing effect of the grass roots is extremely beneficial to the conservation of water and soil.
4. Increase fertility
The use of lawn mower weeding, to wait for the weeds to grow to a certain height before proceeding, a large number of weeds can cover the orchard, and can be used as organic fertilizer for the orchard, increase soil fertility.