The difference between four-stroke lawn mowers and two-stroke lawn mowers

The difference between four-stroke lawn mowers and two-stroke lawn mowers

The stroke refers to the links that the engine goes through in the working cycle. The four-stroke means that it goes through four links. The corresponding two-stroke goes through two links. The main difference between a four-stroke lawn mower and a two-stroke is that the structure of the four-stroke engine is more complex, and the performance of the two-stroke is superior under the same conditions. The two-stroke engine is lighter in weight, has low manufacturing costs, and has a lower failure rate. Relatively speaking, , the four-stroke engine is less noisy. The advantages of four-stroke lawn mowers are high efficiency, good efficiency, water and soil conservation, etc. Let’s look at the relevant knowledge below.

What is a four-stroke gasoline lawn mower?

A four-stroke gasoline lawn mower means that every two cycles of the engine crankshaft of the lawn mower, it goes through four strokes of intake, compression, power, and exhaust to complete a working cycle, while the corresponding two-stroke lawn mower only requires the crankshaft to rotate. One week and two strokes can complete a working cycle. Four-strokes differ from two-strokes in terms of powertrain.

The difference between four-stroke lawn mowers and two-stroke lawn mowers

The difference between four-stroke lawn mowers and two-stroke lawn mowers

1. Structure

From a structural point of view, the structure of a two-stroke lawn mower engine is relatively simple. It is mainly composed of a cylinder head, a cylinder, a piston, a piston ring and other parts. There are air intake holes, exhaust holes and ventilation holes on the cylinder body. ;The opening and closing of the air hole is determined by the position of the piston. Compared with the engine of a four-stroke lawn mower, there is no complicated valve mechanism and lubrication system. The cooling system is generally air-cooled, and the structure is greatly simplified.

2. Performance

When the crankshaft speed is the same, the number of times the engine of a two-stroke lawn mower does work per unit time is twice that of a four-stroke engine. Theoretically, the power of a two-stroke engine should be twice that of a four-stroke engine (but in reality it is only 1.5 to 1.7 times). The engine has higher power per liter, better power, and relatively small engine vibration. In addition, two-stroke engines are lighter in weight, cheaper to manufacture, have lower failure rates, are more convenient to maintain, and are more convenient and flexible to use.

3. Application occasions

Four-stroke engines are more widely used, and most automobiles and construction machinery are equipped with four-stroke engines. Two-stroke engines are more commonly used in situations where the thrust-to-weight ratio is important. For example, lawn mowers, chain saws, model aircraft, farm machinery, etc. If you are harvesting softer crops, it is recommended that you choose a four-stroke lawn mower to make the harvest more tidy and easier to use.

4. Noise

Although both types of lawn mowers are relatively noisy, relatively speaking, four-stroke lawn mowers are less noisy than two-stroke lawn mowers.

Advantages of four-stroke gasoline lawn mowers

1. High efficacy

Generally, each four-stroke gasoline lawn mower can cut more than 8×667 square meters of grass per day, and its efficiency is equivalent to 16 times that of manual weeding.

2. Good benefits

Due to the fast rotation speed of the lawn mower, the cutting effect on orchard weeds is good, especially the cutting effect on weeds with high tenderness is better. Generally, weeding is done three times a year to basically meet the weeding requirements.

3. Maintain water and soil

Manual weeding with a hoe will often cause a certain amount of water and soil erosion because the topsoil is loosened while weeding. Manual weeding on ladder sills will cause more serious water and soil erosion. The use of lawn mowers to weed weeds only cuts off the above-ground parts of the weeds and has almost no impact on the soil surface. In addition, the soil-fixing effect of grass roots is extremely beneficial to maintaining water and soil.

4. Increase fertility

When using a lawn mower to weed, wait until the weeds have grown to a certain height. The large amount of weeds cut can cover the orchard and can be used as organic fertilizer in the orchard to increase soil fertility.