Outboard motors
Which is better 2 stroke or 4 stroke?
On various Internet platforms, from time to time, debates flare up on the issue of the demand for 2-stroke and 4-stroke outboard motors. Some opponents claim that it is better not to find a 2-tactnik, others continue to insist, oh clear benefits 4 stroke engine.
Note that each of these units is endowed with its own advantages and disadvantages, and you need to buy the motor that is suitable for your operating conditions. After reading this article, you will only have to choose the motor you need. We will try to give all the arguments "for" and "against" in the use of these structures.
Environmental Safety
Despite the efforts of the designers of outboard motors, the fuel, which is "obliged" to completely burn out in the chamber, enters in the form of a working or unburned mixture into exhaust gas. The two-stroke is designed so that the oil lubricating crankshaft, penetrates into the combustion chamber in small doses, and then with the unburned mixture flies directly into the reservoir. Here you need to think, choose outboard motor 2 or 4 stroke.
Laws in America and some countries of the European Union prohibit the sale and operation of 2-stroke engines, as they have exceeded environmental regulations on pollution environment. Therefore, if you want to walk on the waters of Europe, then buy a 4-stroke.
As for Russia, at the moment, we do not have such laws. Therefore - you can safely buy a two-stroke! But, we still emphasize one point, if you are a supporter of people who care about the conservation of nature, then you have now received the answer to the question of which two-stroke or four-stroke engine is better.
Motor weight
Let's figure out why the engines are called 2-stroke or 4-stroke. This is explained simply: for two-stroke cycles, every second cycle is a working one, for four-stroke cycles - the fourth cycle. In theory, two-stroke engines should be twice as powerful as four-stroke engines, we note - with equal volumes in the combustion chambers. But practice has shown that this is not the case.
Design features in the form of shortcomings (the ingress of unburned mixture into the exhaust socket), indicate a decrease in this indicator by almost 2 times. It turns out that in order to achieve the goal of uniform distribution of power along the shaft, a 2-stroke motor is needed with a size smaller than a 4-stroke one. Well, if the size is smaller, the engine is lighter, respectively. The conclusion suggests itself - if you want a lighter motor, buy a two-stroke one.
We know when motor weight matters. Inflating your boat every time, you install the motor on the transom, and after leaving the pond, you remove the engine every time, or maybe even store it on the balcony of the Nth floor. Here - the weight of the motor plays a big role.
When the motor is installed on the transom and not removed for a long time from a boat, then in this case the issue of engine mass is not acutely raised. The weight of the motor plays a significant role when the boat is short and the shorter it is, the more often you have to load the bow in order to approach the engine safely or start the course on planing mode. We get another answer to the question of what is better plm 2x or 4x stroke, which is considered in terms of engine weight.
Saving money
Two-stroke and four-stroke engines have the same power, but 4-stroke engines are more expensive than 2-stroke ones, sometimes the difference is up to fifty percent. It's all about the design features of the first, so if you want to save money, buy a two-stroke.
Fuel use
It is no secret that the efficiency of a 4-stroke unit is greater, and fuel and oil consumption is less than that of two stroke motor. This is due, again, to the design features of the engine. In a situation where you go out on the water from time to time - one fuel consumption, and if you spend the whole season on the water, until the freeze-up, then the gasoline consumption increases significantly. Here and think about which one is better to buy a 2-stroke or 4-stroke motor.
Some argue that the resource of a 4-stroke is higher than that of a 2-stroke counterpart. But, this is the real theory. Let's say the manufacturer stated that the motor has a resource of 2 thousand m.ch. To establish this in practice, it is necessary to walk round the clock around the pond, forgetting about the rest and despite weather. And how much such a test for truth will result in is hard to imagine.
Even if such tests were carried out, they can be considered conditional. Most likely, outboard motor manufacturers sponsored these tests, therefore, it is difficult to give an objective assessment of such data. Therefore, there is no need to talk about the PLM resource, most likely it is calculated only theoretically. Conclusion: regarding this question, it is difficult to answer which motor is better, with two cycles or four.
Oil application
Note that two-stroke engines run on a gasoline-oil mixture, and four stroke motors on gasoline, in its pure form. Sometimes when choosing an engine, many buyers see certain inconveniences in the process of preparing a solution of gasoline and oil.
In order to break in the engine, it is necessary to make a mixture of 1:25, and after the engine is broken in, the mixture is prepared at the rate of 1:50. You do not need to have great knowledge of mathematics to prepare such a solution. Some owners of PLM immediately on filling station pour the right amount of oil into the container and then add gasoline, and on the way to the reservoir the mixture is “prepared”.
As far as oils are concerned, self-mixing oils are currently produced and sold. Here, the choice is yours, which outboard motor to buy, 2 or 4 stroke.
Maintenance and repair
Any equipment, mechanisms or structures that are actually in operation, at the end of a certain period of time, will “require” repair. And it becomes clear to anyone that what more expensive equipment the more expensive it will be to repair.
If you understand engines and your hands are “golden”, and it will not be difficult to maintain and repair the motor, then buy a 2-stroke motor. These engines are not complicated in the device, there are specialists who can give advice on repairs.
In addition, two-stroke motors have been produced for a long time and are not discontinued, and there are even craftsmen who can set up such a motor right on the water. Which motor, 2-stroke or 4-stroke to choose according to this criterion, you probably understood.
Other nuances
An important characteristic is the noise of the motor. Two-stroke engines are noisier than four-stroke engines. It becomes noticeable at the smallest speed or at full speed. Based on this, think - in case you like to troll, then you should choose a 4-stroke unit.
Another drawback of the 2-stroke is the high smoke caused by the presence of oil in the mixture. If you like trolling, then you won’t have to talk about comfort during the moments of a tailwind. Therefore, what is better PLA 2x or 4x stroke in this case, you'll figure it out quickly.
Transportation
Engines with four strokes are transported in a certain position, which is indicated in the motor manual. At the same time, two-stroke engines can be transported as you like, sometimes even upside down. This state of affairs is explained simply: 4-stroke engines have oil in the crankcase, so if the transported unit is in the wrong position, it may leak.
Adherents of two-stroke engines focus on this fact, although the fact itself does not affect either the speed or the power of the engine. And in general, I would like to say that the transportation of a 4-stroke engine in this case does not, in principle, bring tangible inconvenience to the user of the engine. Regarding the issue of ease of transportation, the choice is only yours - two-stroke or four-stroke.
Final comparative characteristics
Two-stroke PLM:
Economical in price, what is the merit of the mass production of these motors;
Optimum ratio of price and power;
You can easily choose a motor from a wide range of models;
Models of motors have electronic stuffing, which reduces the likelihood of engine failure and allows you to more accurately tune the PLA when working on water;
Ideal for beginners, for family holidays, and for boats not intended for long-distance water travel.
Four-stroke PLA:
A more advanced engine, at a cost slightly more expensive than a 2-stroke;
Closer to two-stroke models in terms of price-to-power ratio;
Low noise parameters (motors more suitable for trolling);
Constant increase in the model range;
The latest developments in electronic stuffing motor;
Low emissions of combustion products into water, engines are more environmentally friendly;
Less fuel consumption than two-stroke engines, which ultimately saves the consumer's money.
Whichever of the two motors you choose, each of them has its pros and cons. Focus more on your needs, and the choice of PLM will be right for you in every respect!
We offer to choose the most suitable outboard motor for you in the Seamotors18 online store, where wide choose quality and reliable outboard motors from famous brand- companies Hangkai.
Visit the pages of the store's website and call the number indicated on it or leave a request there, we will definitely call you back!
Our highly qualified specialists will advise you on all emerging issues and help you make the right choice!
In order to answer this question, we need to understand what is 2 stroke engine where it is used and what are the advantages and disadvantages over 4-stroke.
Let's start in order. 2-stroke engine - variation piston engine, in which the work process is completed in two piston strokes. Such an engine has only 2 strokes, a compression stroke and a power stroke. Moreover, cleaning and filling the cylinder with a combustible mixture is carried out not by separate cycles, as in a 4-stroke engine, but by joint ones. In this case, the number of piston strokes in a two-stroke engine is greater.
Consider the principle of operation of a 2-stroke engine.
1. Compression stroke.
1.1 Piston movement from the bottom dead center piston (BDC) to top dead piston point (TDC). In this case, the piston closes, first the inlet window, then the outlet.
1.2 After that, the compression of the working mixture begins. At the same time, a vacuum is created in the crank chamber, under the piston, under the action of which a combustible mixture enters the crank chamber through the inlet window.
2. Stroke stroke.
2.1 When the piston reaches TDC, working mixture ignited by a spark from a spark plug.
2.2 Under the action of high pressure, the piston moves from TDC to BDC, while the expanding gases make useful work.
2.3 As the piston descends, it creates high pressure in the crank chamber, the valve closes, thus preventing the combustible mixture from entering the intake manifold again.
2.4 When the piston passes the exhaust port, it will open and the exhaust gases will be released into the atmosphere.
2.5 With further movement, the piston opens the inlet window and the combustible mixture compressed in the crank chamber enters through the channel, filling the cylinder and purging it from exhaust gas residues.
For a more complete picture, consider a video taken from the youtube site:
Consider the main advantages and disadvantages of 2-stroke engines:
Lack of lubrication and gas distribution systems, which significantly reduces the size of the engine;
Simplicity and cheapness in production and manufacture;
Light weight and compact.
The disadvantages are:
Greater fuel consumption than 4-stroke engines;
More noise;
Less durability. But this is a moot point.
Two-stroke engines are used: garden equipment(lawn mowers, trimmers, chainsaws, etc.), also in mopeds, scooters, some motorcycles, karts and gasoline generators and etc.
The choice of oil for 2-stroke equipment should be approached very carefully. Like any motor oils, they must be selected according to the tolerances given by equipment manufacturers. To understand this, you need to know how these motor oils are classified.
Consider the classification by API.
Motor oils for two-stroke engines are also classified according to JASO:
From right choice oil depends on how long the equipment will last. Choose quality and reliable products. All Eurol products meet the stated standard and are thoroughly tested in the laboratory. By choosing Eurol products, you choose quality!
Piston engines have taken a leading position in human economic activity. The attempt to make a 4-stroke engine run more efficiently has led to all sorts of possible and improbable engine designs and how they work. One of this variety of piston schemes with a modified work process turned out to be viable and was widely introduced into technology.
Depending on the number of cycles of the working ICE cycle are divided into two main groups: two-stroke and four-stroke engines. In two-stroke motors, there are only two of them: the compression stroke and the expansion stroke or power stroke. Four strokes have four: intake, compression, expansion or stroke, and exhaust. At first glance, it may seem that the first option is more advantageous, because the work cycle is repeated with each revolution. crankshaft and energy is generated twice as intensively, but in fact this is not entirely true, as directly evidenced by the limited use of two-stroke engines, especially in large machines, installations and units with high level fuel consumption. In order to understand the causes of energy loss during the operating cycle, one must consider the operation of the engine.
Engine operation process
The duty cycle of a 2-stroke engine includes the following sequence of actions:
On the compression stroke, the piston in the cylinder moves from bottom dead center (BDC) to top dead center (TDC). Through the purge window, the fuel charge enters the over-piston space - the combustion chamber, after which the piston closes this window. Rising higher, it gradually covers the outlet window through which combustion products are removed. In this case, a vacuum is formed in the space under the piston (crank chamber), and it is filled with a new portion of fuel. When the piston reaches TDC, the compressed fuel charge ignites;
- on the expansion stroke, the gases formed during the combustion of the fuel put pressure on the piston, it goes down, opening first the exhaust window, and then the purge. Through the first window, the expanded gases enter the muffler and are discharged outside. At the same time, when the piston moves down, the pressure in the crank chamber filled with fuel increases. Fuel is pushed up into the cylinder, filling the space above the piston and pushing out the remaining exhaust gases. Then the cycle repeats.
This principle of operation allows two-stroke engines to do without the gas distribution system characteristic of four-stroke engines, which controls the intake and exhaust valves. On the one hand, this simplifies the design and reduces weight, but on the other hand, gas exchange in the combustion chamber is far from ideal. In a two-stroke mode of operation, when the cylinder is purged, along with the exhaust gases, a certain amount of unburned fuel enters the muffler, which leads to its overspending and increases toxicity. exhaust gases.
Types of gas distribution system
Since the purge windows in the cylinder are sometimes located at the same level, gas exchange inside the cylinder is difficult, not the entire volume of the cylinder is purged with a fresh portion air mixture, and part of the exhaust gases remains in the cylinder. In order to change the exhaust gases to a fresh portion of air more efficiently and quickly, there are design features of the piston and the location of the purge windows in the cylinder. There are several options for purging cylinders:
Loop purge
Loop purge, in turn, is divided into loopback, deflector and high-rise. All these species have one significant disadvantage: Fuel overrun due to removal of unburned fuel charge during purge.
U- or L-shaped purge
U- or L-shaped scavenging is more efficient in terms of fuel economy, but the temperature near the exhaust port increases significantly. The design feature is that for its implementation, a two-cylinder version of the motor is required. One pair of cylinder-piston acts as inlet gases, and the other pair acts as exhaust gases.
Valve or valve-slot purge
Valve or valve-slot purge, unlike other types, requires a timing belt, which is controlled by valves. The valve can be used both to supply a charge and to remove combustion products. When valve-slot purge through the valve in the cylinder head, exhaust gases are removed, and through the windows (slots) fresh charge. This reduces fuel consumption and reduces the toxicity of exhaust gases, but complicates the design of the engine and can disrupt normal mode charge combustion due to elevated temperature.
Direct-flow purge
Direct-flow scavenging is used in engines with two pistons located opposite each other in a horizontal position. In this case, each piston in the course of its movement opens and closes its “own” valve: one piston is responsible for the charge inlet, and the second for the removal of gases. The combustion chamber in this case is the space between the pistons. This option provides for a more complex KShM, and heat inside the cylinders requires additional cooling and more durable items. At the same time, this is the most effective method purge, which ensures complete removal of exhaust gases with minimal loss of fuel charge.
Features of two-stroke engines
A feature of two-stroke engines is the absence of a lubrication system. Oil for lubricating the working surfaces of rubbing parts is delivered to them directly with the fuel mixture. There are two options for obtaining such a mixture: initially pour a pre-prepared “cocktail” of fuel and engine oil into the tank, or mix them in the inlet pipe, where they enter separately. The ratio of fuel and oil is in the range from 1:25 to 1:50. Engine oil, like fuel, burns out during the working cycle, and the products of its combustion are removed along with the exhaust gases.
In terms of power, two-stroke engines are indeed more powerful than their four-stroke competitors. Ideally, their power with the same displacement should be 2:1, respectively, but in reality, due to poor-quality gas exchange in the cylinders, this ratio is 1.5:1. The specific power or power-to-weight ratio of the engine is also higher for two-stroke engines, because their weight is much lighter, and the design is simpler.
But fuel consumption in two-stroke engines is higher than that of four-stroke ones. Due to an imperfect cylinder scavenging system, part fuel mixture literally goes down the drain. For this reason, such engines are practically not used in cars, heavy equipment or powerful power plants consumed by a large number of fuel.
Another point distinguishing two stroke engine from the four-stroke - the process of burning fuel. Since the outlet window opens almost immediately after the charge has been ignited, it is necessary to allow sufficient time for it to complete combustion. In a four-stroke engine, a whole work cycle is given for the combustion process, but here it is only a fraction of a second. To achieve maximum efficiency, in gasoline engines it is necessary to accurately determine the ignition timing, and in diesel engines - to control the time of fuel supply. IN modern models this is achieved through the use of electronics.
Two-stroke engines can be either gasoline (carburetor or injection) or diesel. The difference in the principle of their operation lies in the fact that in the first case, a fuel charge (a mixture of air with fuel) is immediately supplied to the cylinders, and in the second, first air, and at the end of the first cycle, fuel that ignites upon contact with hot air. Gasoline engines widely used in motorcycles, small cars, as well as in lawn mowers, chainsaws and other units with internal combustion engines. Diesel engines have found application in shipbuilding; earlier they were also used on diesel locomotives, tanks and were successfully used in aviation on Junkers bombers. Now shipbuilding is almost the only area of their application, where their slow speed and power, not exceeding 100 thousand hp, came in handy. Unlike four stroke two-stroke diesels do not have separate combustion chambers, which would further complicate their design, so that diesel fuel is supplied and mixed with air directly in the combustion chamber.
So, two-stroke engines have a number of advantages:
— simple design;
- light weight;
- lower loads on structural elements;
— lack of lubrication and timing system;
- more liter power compared to four-stroke.
At the same time, two-stroke motors have disadvantages:
— increased consumption fuel;
— toxicity of exhaust gases;
- a smaller resource in comparison with a four-stroke;
- noise during operation;
- the need to prepare a fuel-oil mixture, which not only complicates the fuel supply system, but also increases oil consumption.
conclusions
From the foregoing, we can conclude that two-stroke engines can be used in cases where fuel consumption does not matter, but such characteristics as low weight and simplicity of design are important. These are ideal options for portable units, small cars as well as motorcycles and mopeds. Compact dimensions two-stroke engines allowed them to thoroughly take a place in a field that would seem completely far from the field for which internal combustion engines were created - in modeling.
Recently, two-stroke engines have become increasingly popular due to the use of electronic systems in their design. This allows you to reduce the toxicity of exhaust gases, regulate the processes of supply and combustion of fuel, which makes the engines more environmentally friendly. So in the near future their scope may expand significantly. As early as the beginning of the 20th century, the development of diesel two-stroke engines began. One of the most successful schemes was developed by Hugo Junkers, and in the 60s of the 20th century, Soviet engine builders also produced an example of an engineering miracle - an opposed 2-stroke diesel engine 5TDF with 700 hp
The design of two-stroke engines has huge reserves in terms of power and efficiency. But because of design features they could not be implemented in mechanical. Quite possible electronic systems will help "two-stroke" to take a leading position among engines internal combustion in the near future.
piston stroke between two dead spots is called a stroke, which is equal to the rotation of the crankshaft by 180 degrees. Accordingly, two-stroke motors are distinguished (the duty cycle occurs in one cycle) and four-stroke (a cycle in two cycles). The differences between the two types of motors are quite serious, and, as a result, this directly affects their use in various mechanisms.
Two stroke motors
In a two-stroke engine, one revolution of the crankshaft is enough to complete the work cycle. This revolution, in turn, is carried out in two stages (tact) - compression and expansion, hence the motor got its name. Two-stroke engines are distinguished by the absence of valves, the role of which is performed by the piston. In general, the value of the piston in such motors is very large: moving, it opens and closes the purge windows (both inlet and outlet). If we externally compare two-stroke and four stroke engine, then the construction of the first variant is much simpler. This can be seen by reading the definition of a four-stroke motor below.
Four stroke motors
The working cycle of a four-stroke engine has four stages (cycles). In addition to compression and expansion (the second and third stages, respectively), an intake (first cycle) and an exhaust (fourth cycle) are added. At the first stage, the piston moves from one dead center to another - from the bottom to the top. The intake valve opens, and the engine cylinder enters required amount fresh fuel-air mixture. On final stage(exhaust) the piston reaches top dead center, and Exhaust valve closes. After that, the working cycle of the four-stroke engine begins anew.
Four stroke engine
Comparison
The difference in the number of cycles is very important, but far from the only difference between two-stroke and four-stroke motors. There is still whole line differences that come from the advantages and disadvantages of one or another engine.
Here are the main differences:
- Two-stroke engines weigh an order of magnitude less, even if the amount of horsepower is the same. A vivid example: at fifteen horsepower a two-stroke engine will weigh 36 kilograms, and a four-stroke engine will weigh almost ten kilograms more.
- The design of four-stroke engines is noticeably more complex, and the production process is longer. All these factors have a direct impact on the price - four-stroke engines are more expensive.
- Transportation and operation of a two-stroke engine is noticeably easier. It can be transported in almost any position, and to use it, it is enough to get it, install it and start it.
- The fuel consumption of a two-stroke engine is about one and a half times greater (for the same horsepower).
- Four-stroke engines, if you start them on full power, work a little quieter than the two-stroke version. The difference in noise is negligible, but it exists, and this is where four-stroke engines have an advantage.
- Another advantage of four strokes is less vibration and smoke. Moreover, the second difference is extremely important for engines, because most people choose a motor that produces less smoke (not so harmful to human health and less environmental pollution).
Findings site
- Two-stroke engines weigh less.
- Four-stroke engines are more complex and more expensive.
- Different complexity in transportation and operation.
- Different fuel consumption for the same amount of horsepower.
- Four-stroke motors make less noise during operation.
- Two-stroke engines emit more smoke during operation.
Dear friend, today we will talk about what a four-stroke engine means. About the history of its invention, the principle of operation, features, technical specifications and areas of application.
Of course, if you have driver's license, then you at least heard this term when you studied at a driving school. But it is unlikely that then they began to delve into all the subtleties, so now is the time to figure out what is happening there under the hood of your iron horse.
There were already engines in the 19th century, but they were mostly large machines powered by steam. Of course, they partially provided for the developing industry, but had many shortcomings.
They were heavy, had low efficiency, large dimensions, it took a long time to start and stop, skilled workers were needed for operation.
The industrialists needed new unit without these shortcomings, they already understood what a four-stroke engine means. And how, under certain conditions, it can be used to increase profits.
It was developed by the inventor Eugene-Alphonse Beau de Rocha, and in 1867 Nikolaus August Otto embodied it in metal.
At the time, it was a marvel of technology. The internal combustion engine was characterized by low operating costs, small size and did not require the constant presence of maintenance personnel.
The device worked according to a special algorithm, which is now called the "Otto cycle". 8 years later, after the launch of the first instance, the Otto company has already produced more than 600 power plants a year.
Very quickly, due to autonomy and compactness, internal combustion engines became widespread.
What is the engine made of?
To understand the principle of operation, let's get acquainted with the main components of the engine:
- (includes crankshaft, pistons, connecting rods) - it is necessary to convert the reciprocating movements of the piston into rotational movement of the crankshaft;
- the head of the block along with the gas distribution mechanism, which opens the intake and exhaust valves in order for the working mixture to enter and the exhaust gases to exit. The timing may include one or more camshafts, which consist of cams for pushing the valves, the valves themselves, and valve springs. For stable operation four-stroke engine, there are a number of auxiliary systems:
- ignition system - for igniting the combustible mixture in the cylinders;
- intake system - for supplying air and working mixture to the cylinder;
- fuel system - for continuous supply of fuel, obtaining a mixture of air and fuel;
- lubrication system - for lubrication of rubbing parts, as well as the simultaneous removal of wear products;
- exhaust system - to remove exhaust gases from the cylinders, reduce exhaust toxicity;
- cooling system - to maintain the optimum temperature of the engine.
What does a four-stroke engine mean and why four strokes
- Now that you have more or less an idea of the design of a four-stroke engine, you can consider the workflow.
It consists of the following stages: inlet - the piston moves down, the cylinder is filled combustible mixture from the carburetor through inlet valve, which are opened by the camshaft cam. When the piston moves down, a negative pressure is created in the cylinder, thereby sucking in the working mixture, namely air with fuel vapor. The intake continues until the piston reaches BDC (bottom dead center). At this point, the intake valve closes; - compression or compression - after the BDC is reached, it begins to move up to the TDC (top dead center). When the piston moves up, compression occurs, the working fuel-air mixture compresses, the pressure inside the cylinder increases. Inlet and outlet valve closed;
- power stroke or expansion - at the end of the compression cycle (at TDC), the working mixture is ignited by a spark in the spark plug. The piston from the microexplosion rushes to the BDC. During the movement of the piston from the TDC to the BDC, the mixture burns out, and the gases increasing in volume push the piston, performing useful work. It is for this reason that the movement of the piston in this cycle is called the working stroke. Inlet and outlet valve closed;
- exhaust gas release - in the final fourth stroke, the exhaust valve opens, the piston rises in top point and pushes the products of combustion out of the cylinder exhaust system passing through the muffler, they enter the atmosphere. After the piston reaches TDC, the exhaust valve closes, then the cycle repeats. These four cycles represent the duty cycle of the motor. The stroke is also called the movement of the piston up or down. One revolution of the crankshaft corresponds to two strokes, and two revolutions to 4 strokes. Hence the name of the four-stroke engine.
What determines the power of a four-stroke internal combustion engine
Everything seems to be clear here - the power of a piston engine is mainly determined by:
- cylinder volume;
- the degree of compression of the working mixture;
- rotation frequency.
You can also increase the power of a four-stroke engine by increasing throughput intake and exhaust strokes by increasing the diameter of the valves (especially intake).
Also maximum power is obtained with the maximum filling of the cylinders; for this, turbines are used for forced air pumping into the cylinder. As a result, the pressure in the cylinder increases and, accordingly, Engine efficiency increases significantly.
Current Application
Four-stroke engines are either petrol or diesel. These engines are used in transport or stationary power plants. It is recommended to use such an engine in cases where it is possible to adjust the ratio of speed, power and torque.
For example, if the engine is paired with an electric generator, then you need to maintain the desired speed range. And when using intermediate gears, a four-stroke engine can be adapted to loads within a fairly wide range. That is to use in cars.
Let's go back to the origins of its creation. A very talented engineer Gottlieb Daimler worked in the group of the inventor Otto, he understood what a four-stroke engine means, its development prospects, and proposed to build a car based on a four-stroke engine. But the chief did not consider it necessary to change something in the engine, and Daimler, carried away by his idea, left the master.
And after some time, together with another enthusiast Karl Benz in 1889, they created a car that was driven precisely by the gasoline four-stroke internal combustion engine of the inventor Otto.
This technology is still successfully used today. In cases where power point works on transient modes or modes with partial power removal - it is indispensable, as it ensures stable stability of the process.
Now, dear friend, are you in in general terms know what a four-stroke engine means, where it is used. Now you are head and shoulders above. But do not be stingy with the information received, share it with your friends. Social media buttons are at your service.
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