CN114233531B - Air distributor, air supply system and marine engine - Google Patents

Abstract

The invention discloses an air distributor, an air supply system and a marine engine. The air distributor is used for the cylinder of the engine, and comprises: a valve body, the inner cavity of the valve body is provided with preset air supply channels, and each air supply channel The first end communicates with the air supply valve on each cylinder of the engine respectively; the air baffle, the air baffle is fixed on the camshaft of the engine, and the air baffle is provided with an air supply through hole for feeding in the air, and the air The baffle is used for conducting the air supply through hole and the second end of the air supply channel according to the firing sequence of the cylinders of the engine. The invention supplies air to each cylinder sequentially according to the firing sequence, avoiding insufficient air supply from the air bottle caused by simultaneously supplying air to different cylinders. To sum up, the present invention solves the technical problem that the volume of the air bottle on board cannot meet the air replenishment requirements of the large-bore engine.

Description

Air distributor, air supply system and marine engine

technical field

The invention relates to the technical field of engines, in particular to an air distributor, an air supply system and a marine engine.

Background technique

When matching a supercharger with a large marine engine, it tends to give priority to satisfying the excess air coefficient requirement of a high load, and a supercharger with a larger turbo is used. Due to the sudden increase in fuel consumption, the energy increase at the turbine end of the turbocharger is small, and the speed of the supercharger cannot be increased in time, so that more air enters the compressor end, and the fuel injected cannot be burned quickly and fully, resulting in poor engine response and black smoke. In order to solve the problem of black smoke, the external air is usually directly entered into the compressor of the supercharger to assist the rotation of the supercharger impeller, so that the speed of the supercharger is increased, thereby increasing the intake air volume. However, when it is applied to an engine with a large cylinder diameter, the total demand for intake air increases, and the supplementary air must quickly enter the cylinder to assist combustion, and the required supplementary air volume will increase. However, it is limited by the volume of the air bottle on board. The air supply method mentioned above cannot meet the air supply requirements of a large-bore engine.

Contents of the invention

In view of this, the first object of the present invention is to provide an air distributor, aiming at solving the technical problem that due to the limited volume of the air bottle on board, it cannot meet the air supply requirements of large-bore engines.

The second object of the present invention is to provide an air supply system.

A third object of the present invention is to provide a marine engine.

In order to realize above-mentioned first object, the present invention provides following scheme:

An air distributor for cylinders of an engine comprising:

A valve body, the inner cavity of the valve body is provided with preset air supply channels, and the first ends of each of the air supply channels are respectively communicated with the air supply valves on the cylinders of the engine;

An air baffle, the air baffle is fixed on the camshaft of the engine, and the air baffle is provided with a supplementary air hole for introducing air, and the air baffle is used for The firing sequence of the cylinders is connected to the second end of the gas supply through hole and the gas supply channel.

In a specific embodiment, when the air supply through hole is connected to the air supply through hole, the cylinder corresponding to the air supply through hole is in an intake stroke.

In another specific embodiment, when the air supply through hole is disconnected from the air supply through hole, the cylinder corresponding to the air supply through hole is at the beginning of the compression stroke.

In another specific embodiment, the air baffle is rotatably attached to the valve body.

In another specific embodiment, the air supply through hole is an annular hole.

Various embodiments according to the present invention can be combined arbitrarily as required, and the embodiments obtained after these combinations are also within the scope of the present invention, and are part of the specific embodiments of the present invention.

The air distributor provided by the present invention, when in use, communicates each air supply channel on the air distribution valve with the air supply valve on each cylinder respectively, and the air supply channel corresponds to the cylinder one by one, and supplies air so that the air passes through the air baffle The gas supply through holes on the cylinder enter each cylinder in turn according to the firing order of the cylinders of the engine to complete the gas supply. The invention supplies air to each cylinder sequentially according to the firing sequence, avoiding the insufficient supply of air from the air bottles caused by simultaneously supplying air to different cylinders. In summary, the present invention solves the technical problem that the volume of the air bottle on board cannot meet the air supply requirement of the large-bore engine due to the limitation of the volume of the air bottle on board.

In order to achieve the above-mentioned second purpose, the present invention provides the following scheme:

An air supply system, comprising the air distributor described in any one of the above.

In a specific embodiment, the air supplement system further includes an air supplement solenoid valve;

The inlet of the air supplement solenoid valve is used to let in air, and the outlet of the air supplement solenoid valve is used to communicate with the inlet of the air distributor.

In another specific embodiment, the air supplement system further includes a supercharger and an intercooler;

The inlet of the supercharger is used to feed air, the outlet of the supercharger is used to communicate with the inlet of the intercooler, and the outlet of the intercooler is used to communicate with the intake ports of each of the cylinders connected.

Various embodiments according to the present invention can be combined arbitrarily as required, and the embodiments obtained after these combinations are also within the scope of the present invention, and are part of the specific embodiments of the present invention.

Since the air supply system provided by the present invention includes any one of the air distributors mentioned above, the beneficial effects of the air distributor are included in the air supply system provided by the present invention.

In order to achieve the above-mentioned third purpose, the present invention provides the following scheme:

A marine engine, comprising the air supplement system described in any one of the above.

In a specific embodiment, the marine engine further includes a plurality of cylinders;

Air supplement valves are respectively installed on the cylinder heads of each of the cylinders.

Since the marine engine provided by the present invention includes any one of the air supply system described above, the beneficial effects of the air supply system are included in the marine engine provided by the present invention.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the top structural schematic view of the air distributor when the baffle provided by the present invention is in a position;

Fig. 2 is the top structural schematic view of the air distributor when the baffle provided by the present invention is in another position;

Fig. 3 is a front view sectional structural schematic diagram of the air distributor provided by the present invention when it is in the air supply state;

Fig. 4 is a schematic structural diagram of the air supply system provided by the present invention.

Among them, in Figure 1-Figure 4:

Air distributor 1000, valve body 100, air supply passage 101, air baffle 200, air supply through hole 201, air supply solenoid valve 2000, supercharger 3000, intercooler 4000, cylinder 5000.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings 1-4 in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the referred position or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

As shown in Figures 1-2, the first aspect of the present invention provides an air distributor 1000, which is used for the cylinder 5000 of the engine, and is used to solve the problem that the volume of the air bottle on board is limited and cannot meet the air supply requirements of large-bore engines. technical problems.

Specifically, the air distributor 1000 includes a valve body 100 and an air baffle 200, the inner cavity of the valve body 100 is provided with preset air supply channels 101, and the first ends of each air supply channel 101 are respectively connected to each cylinder 5000 of the engine. The air supply valve on the top is connected. The number of supplementary air passages 101 is equal to the number of cylinders 5000 in the engine, and they are provided in one-to-one correspondence. In this embodiment, the preset number is 6 as an example. It should be noted that the number of supplementary air passages 101 is not limited to 6, and may also be set to other numbers.

The air baffle 200 is fixed on the camshaft of the engine, and the air baffle 200 is provided with a supplementary air through hole 201 for introducing air, and the air baffle 200 is used to conduct supplementary air according to the firing sequence of the cylinders 5000 of the engine The through hole 201 and the second end of the gas supply channel 101 .

Specifically, the size of the air supply through hole 201 is specifically set according to needs.

The air distributor 1000 provided by the present invention, when in use, connects each air supply channel 101 on the air distribution valve with the air supply valve on each cylinder 5000 respectively, and the air supply channel 101 corresponds to the cylinder 5000 one by one to supply fresh air. The air is made to enter each cylinder 5000 sequentially through the air supply through hole 201 on the air baffle 200 according to the firing sequence of the cylinders 5000 of the engine to complete the air supply. The present invention replenishes air to each cylinder 5000 sequentially according to the firing sequence, avoiding insufficient air supply from the air bottle caused by replenishing air to different cylinders 5000 at the same time. The invention solves the technical problem that the volume of the air bottle on the ship cannot meet the air supply requirements of the large-bore engine.

In some embodiments, when the gas supplement through hole 201 and the gas supplement through hole 201 are connected, that is, when the gas supplement phase starts, the cylinder 5000 corresponding to the gas supplement through hole 201 is in an intake stroke. Specifically, the intake stroke of the cylinder 5000 means that the piston in the cylinder 5000 is before the bottom dead center and after the exhaust valve of the engine is closed. Now the exhaust valve has just been closed, the fresh air in the cylinder 5000 is low, and the air pressure is low, which is conducive to the opening of the air supply valve, and the air supply enters the cylinder 5000. The valve timing of the engine is shown in Figure 3.

In some embodiments, when the air supply through hole 201 and the air supply through hole 201 are disconnected, the cylinder 5000 corresponding to the air supply through hole 201 is at the beginning of the compression stroke, and the cylinder 5000 at the beginning of the compression stroke means that the piston of the cylinder 5000 After the bottom dead center, before the intake valve of the engine closes, at this moment, the air in the cylinder of cylinder 5000 is compressed, and the air pressure is high. If the air supply valve continues to open, it will cause air backflow.

In some embodiments, the present invention discloses that the air baffle 200 is rotatably fitted to the valve body 100 . Specifically, the air baffle 200 seals the valve body 100 , the valve body 100 is fixed, and the air baffle 200 rotates following the camshaft.

In some embodiments, the present invention discloses that the supplementary air hole 201 is an annular hole. It should be noted that the shape of the air supply through hole 201 is not limited, and can be specifically set according to needs.

The present invention directly replenishes the gas into the cylinder 5000 according to the ignition sequence. Compared with the traditional gas replenishment method, the present invention replenishes the gas more quickly and can instantly increase the intake air volume. In the late stage of the starting process and when the load is suddenly added, the engine can Sufficient air combustion is given to the sudden increase of fuel intake, which improves the engine response and avoids the black smoke phenomenon. At the same time, according to different air supply conditions, such as start-up stage, load sudden increase stage, etc., the length of the air supply phase or the size of the air supply pressure can be adjusted to meet the air supply requirements under different working conditions.

As shown in FIG. 4 , the second aspect of the present invention provides an air supply system, including the air distributor 1000 in any one of the above-mentioned embodiments.

Since the air supply system provided by the present invention includes the air distributor 1000 in any one of the above, the beneficial effects of the air distributor 1000 are included in the air supply system provided by the present invention.

In some embodiments, the air supplement system further includes an air supplement solenoid valve 2000 , the inlet of the air supplement solenoid valve 2000 is used to feed air, and the outlet of the air supplement solenoid valve 2000 is used to communicate with the inlet of the air distributor 1000 . That is, in the present invention, the gas supply solenoid valve 2000 is used to control the on-off of the gas entering the air distribution valve.

Specifically, the air supplement solenoid valve 2000 is connected with the controller signal, and the controller controls the on-off of the air supplement solenoid valve 2000, which further improves the automation of the air supplement system.

In some embodiments, the supplementary air system further includes a supercharger 3000 and an intercooler 4000, the inlet of the supercharger 3000 is used to feed air, and the outlet of the supercharger 3000 is used to communicate with the inlet of the intercooler 4000, The outlet of the intercooler 4000 is used to communicate with the intake port of each cylinder 5000 .

The air intake of the cylinder 5000 is realized by setting the supercharger 3000 and the intercooler 4000 . It should be noted that on-off valves can be provided between the intercooler 4000 and the air inlets of each cylinder 5000 , so as to control the on-off of the gas entering each cylinder 5000 .

The third aspect of the present invention provides a marine engine, including the air supply system in any one of the above embodiments.

Further, the present invention discloses that the marine engine further includes a plurality of cylinders 5000, and the cylinder head of each cylinder 5000 is respectively equipped with an air supplement valve.

Since the marine engine provided by the present invention includes any one of the air supply system described above, the beneficial effects of the air supply system are included in the marine engine provided by the present invention.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Moreover, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that an article or device comprising a set of elements includes not only those elements but also other elements not expressly listed, Or also include elements inherent in the article or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in an article or device comprising the aforementioned element.

In this paper, specific examples are used to illustrate the principles and implementation modes of the present invention, and the descriptions of the above embodiments are only used to help understand the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (9)

1. An air distributor for a cylinder of an engine, comprising: A valve body, the inner cavity of the valve body is provided with preset air supply channels, and the first ends of each of the air supply channels are respectively communicated with the air supply valves on the cylinders of the engine; An air baffle, the air baffle is fixed on the camshaft of the engine, and the air baffle is provided with a supplementary air hole for introducing air, and the air baffle is used for The firing sequence of the cylinder is connected to the second end of the air supply through hole and the air supply channel, the air baffle can be rotated to fit the valve body, and the air baffle seals the valve body, so The valve body is fixed, and the air baffle rotates with the camshaft. 2. The air distributor according to claim 1, characterized in that, when the air supply through hole is connected to the air supply through hole, the cylinder corresponding to the air supply through hole is in the intake stroke . 3. The air distributor according to claim 2, wherein when the air supply through hole is disconnected from the air supply through hole, the cylinder corresponding to the air supply through hole is at the beginning of the compression stroke part. 4. The air distributor according to any one of claims 1-3, characterized in that, the air supply through hole is an annular hole. 5. An air supply system, characterized by comprising the air distributor according to any one of claims 1-4. 6. The air supplement system according to claim 5, further comprising an air supplement solenoid valve; The inlet of the air supplement solenoid valve is used to let in air, and the outlet of the air supplement solenoid valve is used to communicate with the inlet of the air distributor. 7. The air supply system according to claim 5 or 6, further comprising a supercharger and an intercooler; The inlet of the supercharger is used to feed air, the outlet of the supercharger is used to communicate with the inlet of the intercooler, and the outlet of the intercooler is used to communicate with the intake ports of each of the cylinders connected. 8. A marine engine, characterized by comprising the air supply system according to any one of claims 5-7. 9. The marine engine according to claim 8, further comprising a plurality of cylinders; Air supplement valves are respectively installed on the cylinder heads of each of the cylinders.

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