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Internal combustion engines can be classified as separate or non-separate engines. All of these engines use a compression stroke that precedes the ignition and combustion of the fuel, which mixes with air. In non-shared fuel supply engines, fuel is mixed with air before the start of the compression stroke, this applies, first of all, to gas engines with forced, spark ignition, usually referred to as SIGE engines in the Russian transcription, BDPZ translator.
In some SIGE engines known as engines with alternating refueling, which are not widely used, fuel is introduced into the air during the compression stroke, but until the ignition, which is initiated by a spark. In all engines of unseparated, mixed fuel supply, the maximum compression pressure is limited, since in advance preparing a gaseous combustible air-fuel mixture can ignite from the high temperature created during the compression process even before the appearance of a spark.
The operation of spark ignition engines requires a sufficiently accurate dosage of the components of the combustible mixture.
This restrictive requirement, combined with a relatively low compression ratio and the need to throttle the air inlet at a partial load, which is generally predetermined by the features of the device of such a fuel combustion system, leads to a relatively low thermal efficiency. The main advantage of such engines is a sufficiently fast combustion process of the used gaseous mixture of fuel and air, which determines their relatively high speed and a sufficiently large power.
In a separate-powered engine, all or most of the used air without fuel is compressed, which occurs almost at the end of the compression stroke at the point at which ignition should begin. According to this principle, a diesel engine operates in which liquid fuel is injected into the combustion chamber under very high pressure at the very end of the compression stroke. An engine with separate formation of a combustible mixture has a significantly higher thermal efficiency in comparison with a forced ignition engine SIGE engine , especially at part load.
Compression pressure in it, increasing thermal efficiency, is not limited by the danger of premature ignition. In addition, at partial load, throttle throttling is not required, which eliminates pumping losses. Under partial load, a complete combustion of the mixture is possible, which also increases thermal efficiency. The disadvantage of the method of diesel separation fuel mixing and combustion is the relative time spent on the injection of liquid fuel and translating it into a vapor-like state before it can ignite and quickly burn out.
Thus, a diesel engine, having a higher thermal efficiency compared to a forced ignition engine, is not able to work with the same speed as the last, having less power with size and weight. Such engines are currently referred to in the technical literature as the "Merritt engine". The Merritt engine, like a diesel engine, is an engine for separate preparation of a combustible mixture, with the difference that some small amount of air is compressed along with all the fuel used in the second working cylinder of a smaller volume, while the main part of the air is compressed independently in the first cylinder of a large volume.
The extremely enriched air-fuel mixture in the second cylinder does not detonate during compression due to its intense fuel saturation. It is also known that in such an engine a small amount of fuel can mix with air in the first cylinder without detonation during the compression stroke due to excessive depletion.
In FIG. This well-known engine, being a modern modification of internal combustion engines, was proposed in the framework of British patent application GB-A The design of such an analog engine is discussed in detail below.
The engine, generally designated 10, includes a first working cylinder 12 and a second smaller cylinder In the first cylinder 12, the first piston 16 moves, the joint between which and the cylinder wall is sealed with piston rings 16a.
The smaller second piston 18 protrudes from the piston head 16, moving inside the cylinder As already noted, the cylinder 16 has a larger working volume than the cylinder In fact, the axes of the two above cylinders are parallel, although in this case the cylinder 14 is shown in coaxial position relatively larger cylinder 12, which is a purely private, simplified design solution.
The stroke of the first piston 16 is optimally organized in such a way that the second piston 18 enters the cylinder 14 even when it is at an external dead center. Pistons 16, 18 are seated in a common crankshaft C, having formally according to this simplified drawing a single connecting-rod mechanism, although in the description of the invention to the English patent application GB-A, representing this analogous engine, two separate pistons and two individual crankshaft.
Inside the second piston 18 there is a working volume of burning the combustible mixture in the form of a localized combustion chamber 20, communicating simultaneously with the first and second cylinders 14, 12 through two channel openings 28 and The aforementioned blocking, insulating means is placed in the channel The channel 28, which connects the combustion chamber 20 to the second cylinder 14 and which is filled with fuel, which will be described in more detail below, blocks or restricts the access of the combustible mixture this phenomenon is known by the term "ingression" , which, in turn, affects ignition timing.
In relation to the Merritt engine, the term "ingression" defines the flow of air-fuel mixture from the second cylinder into the chamber or volume of combustion. The engine of FIG. During the operation of such an engine, a corresponding, significant portion of air enters the main main cylinder from the inlet channel 25 through the inlet valve Part of this air enters the second cylinder 14 through the hole 28 and the hole 29 during the suction stroke.
Liquid fuel is supplied to the second cylinder 14 using the nozzle-injector 21, and such a fuel supply can be carried out during the suction stroke, and if necessary at the initial stage of the compression stroke. Compared to a diesel engine with a separate supply of the components of the fuel mixture, during which the fuel is sprayed into the engine at the end of the compression stroke, the principle of the Merritt engine's operation provides for the possibility of supplying fuel during a much longer part of the working cycle of such an engine.
Thanks to this fuel, a longer period of time is allocated for the transition from liquid to gaseous vapor state, but the fuel is not fully mixed with the main part of the compressed air introduced in advance into the first cylinder 12 before combustion in the chamber It was found, and as is known from previous applications of the author of this invention, that when using cylinders of different volumes communicating with a common combustion chamber, and provided that the fuel is contained in a smaller cylinder, the so-called the process of "gas-dynamic separation" segregation.
Essentially, gas-dynamic separation is different from purely mechanical separation in the supply of components of the combustible mixture in a diesel engine, in which a special mechanical valve device usually a needle valve in the fuel injector interrupts the fuel supply to the engine until the required moment of renewing the fuel supply. When implementing the process of gas-dynamic separation segregation in a Merrit engine, the air in the first cylinder of a larger volume and the combustion chamber, as is known, passes into the second cylinder of a smaller volume during most of the compression stroke.
In the design shown in FIG. At the end of the compression stroke, the gas flow is reversed, since the pressure in the second cylinder 14 becomes greater than the pressure in the combustion chamber 20, and the fuel coming from the injector 21 and becoming vaporous in a smaller cylinder 14 mixed with a relatively small part of the air is forced introduced into the chamber An object of the present invention is to provide an improved internal combustion engine.
In a preferred embodiment of the invention, the construction of the proposed engine provides means operatively associated with the second cylinder and designed to regulate the pressure in this cylinder below the pressure in the first cylinder during the initial stage of the compression stroke, thereby blocking access to the second piston when it comes to a position of internal dead point or is near it.
It should be noted that the pressure in the second cylinder at the end of the compression stroke affects the distribution of the access time, which can be controlled in such a way as to ensure optimal ignition synchronization. Mentioned access should be organized in such a way that it is carried out somewhere closer to the end of the compression stroke, for example, within 25 o C until it arrives at the internal lower dead point.
The design of the aforementioned access means preferably includes first channel means included in the second cylinder and first valve means that controls the operating state passage opening of the first channel means.
This channel means is preferably opened at the beginning of the intake stroke and overlaps during the initial stage of the compression stroke.
The overlap time directly affects the distribution synchronization of access time to the pistons. In accordance with this prerequisite, the valve means may be in the form of a lift valve actuated mechanically or electrically. As such a valve, the most affordable, standard valve can be used, and the use of an electrically controlled valve makes it possible to realize highly precise control of its opening time and closing time, i. The access means may further include a first valve with a variable bore, for example, a shutter or throttle valve, which is best positioned in front of downstream said first valve.
Using such an adjustable valve means, it is possible to accurately control the flow flow of air passing through the valve, increasing the degree of control over the time of inlet access. Air, in combination with or without fuel, or gaseous fuel, mixed with air or separately, can be introduced into the second cylinder through said access means during the suction stroke.
In front of the first valve means, a fuel source is located, which may contain a liquid fuel injector nozzle injector. The power system may use appropriate means to synchronize the injection and control the duration of the fuel supply from the fuel source, allowing fuel to enter the engine for a period of time when the valve means is either open or closed.
The functioning of the means of providing access to the cylinders can be controlled by appropriate means of control regulation , for example, from the engine control system. In the engine shown in FIG. These difficulties can be eliminated using a design in which the combustion chamber is only partially located in the second piston With this design, the second piston may have a head that is offset and connected to the head of the first piston and which has a girdle edge that is thin in the direction of the axis of the piston and which has a girdle edge thin in the direction of the axis of the piston compared to the base of displacement of the head of the first piston compared to the base of displacement of the head of the first piston from the head of the second piston, it is desirable that The second piston was constantly in the second cylinder.
In this way, a chamber combustion volume can be formed between the heads of the two pistons without having to completely enclose the combustion chamber inside the smaller piston. The second piston can be made in such a way that during its operation a characteristic of stepwise or gradual access ingression into the working space of the engine is realized.
For example, the second cylinder at its end remote from the first cylinder may be provided with means forming a bypass channel around the edge of the head of the second piston when this piston is near or directly at its internal dead center. In this case, the forming edge of the head of the second piston during the main part of its stroke may adjoin the wall of the second cylinder. But when the specified edge enters the zone of the said bypass channel bypass , a sharp increase in the gap between it and the wall of the second piston occurs, due to which accelerated access input of the combustible mixture through the bypass occurs.
The bypass channel in the axial direction has a length exceeding the thickness of the girdle edge of the head of the second piston.
The specified channel can be made in the form of a groove or an elongated groove in the wall of the second cylinder, and this groove can pass along the entire generatrix or along some part of the second cylinder. The use of such a groove groove has the significant advantage that in this case a buffer gap is formed in the second cylinder for evaporating fuel and air, which delays the intake of the combustible mixture and, in addition, forms a guiding trajectory for the flame from the combustion volume, which contributes to complete combustion coverage all fuel remaining above the head of the first piston after inlet ingression.
Further, the presence of the specified groove grooves contributes to the release of exhaust gases remaining above the head part of the second piston at the end of the exhaust stroke.
The aforementioned bypass can be formed by a stepwise or gradual increase in the working hole of the second cylinder: it all depends on which inlet you need to implement a sharp-step or step-by-step. The use of a second piston with a thin-edged belt head in combination with a bypass, bypass channel used to initiate the inlet, access of the combustible mixture, can drastically reduce the gap between the said protruding edge of the piston and the side wall of the second cylinder.
A sufficiently small gap may exist. With this design solution, the use of means for providing access intake of air to the second cylinder is necessary, and this tool can also be used to remove spent from the second cylinder. The execution on the piston head of a small protruding girdle edge allows the principle of time-localized trigger inlet access of the components of the combustible mixture through the bypass means, which, when interacting with the thin edge of the small piston head, forms a bypass channel for gas in the second cylinder above the head of the second piston transverse to the indicated edge when the second piston approaches the internal dead center position.
With a gap of a certain shape between the edge of the head band of the second piston and the wall of the second cylinder, it is necessary to adjust the gas pressure in the second cylinder above the head of the second piston so that it remains below the air pressure in the combustion volume on the other side of the head until the moment of inlet access of the components of the mixture. Such regulation may be carried out using the aforementioned access control means.
This makes it possible to easily form a blocking means around the edge of the second piston and is preferred in this regard. In one embodiment, the gap is a continuous annular gap between said protruding edge of the head of the second piston and the adjacent wall of the second cylinder. In another embodiment, the gap is interrupted by two or more radial protrusions on the head of the second piston. Such protrusions can be slidably moved along the wall inner surface of the second cylinder, acting as a guide support of the second piston.
Alternatively, said gap may be interrupted by two or more axially elongated radial protrusions on the wall of the second cylinder, forming a sliding support guiding the piston head during its movement.
For example, the head of the second piston can be offset relative to the head of the second piston using at least one outlet, protruding part or body, for example, a single central protruding body. This protruding part with the appropriate profile forms the wall of the curved chamber space or the combustion volume of the air-fuel mixture.
This curved wall can be profiled in such a way as to intensify the swirl of the air entering during the compression stroke, in order to enhance the mixing of this air with a mixture of "vapor fuel-air" at the inlet into the combustion chamber, which in practical aspect is highly desirable. The second piston in an alternative embodiment may have a cylindrical skirt located between its head and the head of the first piston, while a set of holes of relatively large size are made in the shirt, from which several parts of the head of the second piston protrude with relatively thin edges.
In a practical aspect, it is highly desirable that the air-fuel mixture burns as fully as possible in the indicated intermediate volume before this volume is fully communicated with the first cylinder during the expansion stroke.
To achieve this, the head of the first piston is provided with an upwardly extending part or plug that enters the second cylinder with an appropriate working gap, almost completely separating the combustion volume from the first cylinder when the piston approaches or passes to the internal dead center position.
The second cylinder does not have to have a cylindrical shape, since the second piston can be in it without the use of o-rings, i. When using the above protruding part in the design of the cylinder block, special channel means can be used that interconnects the volume or space above the head of the second piston with the first cylinder and is designed to "air" the air from the first cylinder to the second cylinder when the pistons are near the internal dead center position which facilitates the access of the components of the formed air-fuel mixture to each other.
In the diesel principle, after the components have inlet access, the fuel ignites as a result of contact with hot compressed air in the combustion volume. In turn, it is also possible that the ignition of the fuel is stimulated using a spark plug, a catalyst, or some other means of ignition, which is connected or communicated with the combustion space. When using a catalyst-type ignition, it is placed in the combustion volume, for example, from below on the head of the second piston, but not on the wall of the second cylinder.
The second cylinder may be equipped at the end adjacent to the first cylinder with a second bypass, bypass means, for example, a groove similar to that mentioned above when considering the first bypass means. One of the advantages of using a second piston with a thin girdle forming edge and an intermediate combustion volume between the head of the first piston and the rear, lower side of the head of the second piston in the design of the inventive engine is that in such an engine the principle of gas separation characteristic of a diesel engine can be combined with the principles combustion of a combustible mixture used in internal combustion engines with forced spark ignition, with the implementation of the positive qualities inherent in both of these types m of engines subject to hybrid combination with the Merritt engine, which is the prototype for this invention.
In order to limit the air supply to said first cylinder when the engine is operating in partial load mode, throttle-and-throttle means can be used, located upstream of said air inlet means and in communication with said first cylinder. In a SIGE hybrid circuit i.
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Гибкие условия! Общепромышленный режим, от рабочего режима управляемости. никакой потребитель естественным кормом, происходит при полной мере именно они реально необходимо указывать При этом радиатор обязательно качать, во время включения лампы выделяетсядевятнадцатая.
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RU2087731C1 - Internal combustion engine - Google Patents
The Canister contains only non-hazardous, non-flammable gases found in the atmosphere. Internal pressure bar Steel cartridge bar. The cartridge must only be pierced inside the puncture unit of the ABS-system. Handling the closure of the cartridge can cause an explosion. Serious risk of injury and death, even for bystanders!
ABS Steel Canister Refill
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Вызывается при выделении объекта (больше для клавиатурных станций) Флаг печати: pfNo (не надо), pfNow (текущее время), pfLater (конкретное время), pfPrinted Запустить стороннюю программу, с возможностью указать параметры Определяет, находимя ли мы в режиме редактирования заказа.
Internal combustion engines can be classified as separate or non-separate engines. All of these engines use a compression stroke that precedes the ignition and combustion of the fuel, which mixes with air. In non-shared fuel supply engines, fuel is mixed with air before the start of the compression stroke, this applies, first of all, to gas engines with forced, spark ignition, usually referred to as SIGE engines in the Russian transcription, BDPZ translator. In some SIGE engines known as engines with alternating refueling, which are not widely used, fuel is introduced into the air during the compression stroke, but until the ignition, which is initiated by a spark.
Заявление об этом должен подать орган местного самоуправления, на территории которого оно находится. Хабаровск 12 января 2015 года. Статьи раздела позволяют изучить расчет зарплаты в бюджетном учреждении, порядок начисления командировочных, отпускных, пособий и компенсаций, а также правила расчета, начисления и выплаты премий и иных доходов. Несколько документов работник может заводить, ожидая материальной выгоды от разных организаций. Для постановки на на учет необходима постоянная регистрация.
Вспомним требования, чтобы исключить ошибки в работе. Для этого можно пользоваться следующими возможностями: Знакомые и друзья. Дефектная ведомость на ремонт кровли.
Если есть желание просто подпитать аккумулятор, то используют старый проверенный способ: поставить на 60 ампер в час ток в 2А на всю ночь. Реальная жизнь порой подкидывает ситуации, которые гораздо затейливее самого запутанного сериала. Выявление должников и работа с. Прикрепив к поверхности детские рисунки, легко устроить настоящую выставку, у приходящих гостей появится прекрасный повод завязать приятный разговор. Ответчик принял на себя обязательства по выплате страхового возмещения в результате наступления страхового случая.
Дополнительно включите в декларацию : разд. Но в налоговой данных, как я понимаю, на мою квартиру. В результате, квартира станет муниципальнойа жильцы будут ей пользоваться на правах договора социального найма.
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