4-stroke engine: the principle of

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2018-04-04 08:00:19

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Type of power equipment is critical when choosing. Today there are two options – 4-stroke engine and 2 stroke.

4 stroke engine

Features

Power equipment works on the basis of expansion of gases when heated, which arises upon ignition of the fuel entering into the interior of the cylinder. Many are of the opinion that 4-stroke engine Briggs Stratton has the best performance. To get a definite answer, it is necessary to understand the peculiarities of both types.

Crank design and the mechanism responsible for the distribution of gas-are essential, equally important system for lubricating elements, ignition and power.

A Crank device performs the transmission of the necessary influence of the expanding gases, while a mechanism that distributes, delivers the gasoline into the space of the cylinder.

4-stroke engine is characterized by economical fuel consumption, the absence of flammable mixtures in the exhaust, less high level of the reproduced sound, and environmentally friendly, thanks to which it acquired the distribution of many of the companies involved in the production of cars.

4 stroke engine

How does the two-stroke engine

The Whole process is based on a working stroke and compression.

The Piston is basically two positions – the lower and upper dead point. When you move from one to the other, alternately overlaps the vent and the outlet hole, then starts to shrink which is present in the cylinder gas. At this time, the fuel mixture exits the inlet ports and into the chamber crank mechanism, that it subsequently is compressed.

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After a pair of air and gasoline will reach maximum compression, an electrical spark coming from the spark that ignites them. At this time, pressure builds up, contributing to the movement of the piston to the bottom due to a sharp increase in gas volume and temperature of the mixture. In the process of moving is open to the outlet hole and open out the combustion products. The mixture is pressed when the piston is in the combustion chamber, simultaneously opens the vent window.

Chinese 4 stroke engine Lifan

Positive and negative sides

The Mechanism has a sufficient number of drawbacks, among which high fuel consumption, a large part is wasted. This is due to a partial release of vapor mixture while simultaneously opening the exhaust and inlet ports. It should also be noted the continuous depletion of oil, as it is included in the composition of the mixture and it is not possible without engine operation. Another negative side is the continuous preparation of the fuel mixture.

Push-pull mechanism has a small weight and dimensions, than can not boast of a 4-stroke engine. But in the process of operation of the vehicle it gives more problems, which this variant is common in the field of modeling, where particular importance is attached to each extra kilogram.

the engine is 4 stroke Chinese

How it works four stroke motor

It is totally different from its lighter counterpart. Principle 4-stroke engine is in the cycle consisting of sequential intake, compression, stroke and release, which has been applied the valve system.

The Piston opens the inlet device by moving downward, then combustible mixture enters the cylinder, at the same time creates a working mixture after mixing with the remnants of the used composition.

Processes, systematically repeated, in sequence represent a duty cycle, they occur in all the cylinders and provide the execution of mechanical work by converting energy.

4-stroke diesel engine

Advantages

Motor in a conventional car works on the basis of a four-phase cycle, it occurs during the four movements of the piston or two revolutions of the crankshaft.

4-stroke diesel engine has a completely different method of ignition of the mixture and its formation, compared to the petrol variant. The main difference is the intake stroke as in a diesel cylinder is supplied with air heated to high temperatures, and the fuel sprayed on the smallest particles is ignited under the influence of the temperature level.

4-stroke engine has in its design the oil sump, that part is responsible for lubricants, more precisely, for the constant presence at the prescribed level. The oil pump conveys the material into the lubrication system and distributes on the inner walls of the cylinder. In the end, the piston friction is reduced due to the oil thin film. Special oil scraper ring elements to prevent the ingress of liquid oil into the combustion chamber by the reverse of abstraction. While the oil pump is usually used in engines with power greater than 5 l/s. In other cases, the lubricant is distributed oil mist, which is provided by the crankshaft.

For 4-stroke engine has less load, due to this, the oil flows systematically in the requiredvolume, thereby increasing the life of the mechanism.

During the season, only needed one replacement grease. It should be noted that you need to periodically check the oil level, although it can not suddenly disappear. Today, manufacturers have simplified the task to drivers and equipped with modern models of special sensors monitoring the oil level and informing about the necessity of its replacement.

4 stroke engine briggs stratton

Main difference

As noted above, two types of motor have a fundamental difference, which is the lubrication of two-stroke mechanisms, carried out with a mixture of gasoline and oil which then burns. Some of them have a special system that feeds oil into the crankcase, but the meaning remains the same – the gasoline is burned together with oil. While the Chinese 4-stroke engine "Lifan", like any other similar plan, equipped with devices for returning oil in a special compartment.

Lubricants

Because of the differences in engines, motor oils must meet various requirements:

  • Oil for lubrication of the mechanism should have high lubricating properties which remain the same for a long time;
  • For other types it is necessary to maximize the combustion of the lubricant with minimal residual phenomena in the form of soot and ash.

At the dawn of the engines of conventional distillation of petroleum products used for the production of grease. The composition was the same for both options. The need to create new oils did not arise due to the fact that a 4-stroke engine had low power, and as a result, minor wear and small loads into its constituent elements. Later, the reserve compositions have been exhausted a gradual increase of revs in the process and General parameters. This problem was solved by the use of additives-special additives for automotive oils. They are now substantially improve the characteristics of the lubricant.

principle of 4 stroke engine

Capacity

There is an opinion that 2T engines are more powerful due to the complete use of fuel energy during two revolutions of the shaft. It is not so, because in this embodiment the cylinder, in contrast to the motor of another type, is not a one-piece construction, and it falls on the exhaust and intake openings, respectively, burns less fuel.

The Simplicity of the mechanism 2T caused using as lubricant a mixture of gasoline and oil. The working mixture with the content of the lubricant is characterized by lower allocation of energy. Also structural features led to the empty flow of the combustible mixture, which accounts for quite a significant part. This engine is 4-stroke Chinese has a more complex performance, and as a result, a minor amount of burning fuel. That is, the 2T motors are more power only in a narrow range.


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DE: https://tostpost.com/de/gem-tlichkeit/15610-4-takt-motor-funktionsprinzip.html

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KK: https://tostpost.com/kk/domashniy-uyut/15596-4-takt-l-oz-alt-ysh-zh-mys-steu-princip.html

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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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