DE102016211685A1 - Injection module and engine comprising such an injection module - Google Patents

Abstract

The present invention relates to an injection module (1) comprising an upper part (2) and a lower part (3), wherein the upper part (2) has at least two first receptacles (4) and one first opening (6) associated with each first receptacle (4). wherein the lower part (3) has at least two second receptacles (5) and in each case one second opening (7) assigned to each second receptacle (5), wherein in each case a first receptacle (4) and a second receptacle (5) are arranged, receiving an injector (8) for selectively preventing or releasing a fluid flow between the first port (6) associated with the first port (4) and the second port (7) associated with the second port (5), the top (2) having a fluid inlet (9) which is connected to each first opening (6), wherein the lower part (3) has a plurality of fluid outlets (10), and wherein each fluid outlet (10) is connected to a second opening (7).

Description

State of the art

The present invention relates to an injection module for an engine. In particular, the injection module is a CNG injection module for an internal combustion engine. Furthermore, the invention relates to a motor, in particular an internal combustion engine, which is operable with CNG. CNG is the abbreviation for compressed natural gas and is used as fuel for internal combustion engines.

From the prior art modules are known which summarize several individual injection elements for metering the injection quantity. Such modules usually comprise a single bar, which also serves as a distributor of the gas to be injected to the individual injection elements and as a holding element for the individual injection elements. For example. For example, the individual injection elements may be arranged suspended on the strip and connected to an outlet with one cylinder of an engine each. The strip can then be attached to the engine block, thus also securing the individual injection elements to the engine block.

In this case, an injection element is understood to be a controllable valve with which a defined quantity of fuel can be provided at a defined point in time in order to inject this fuel into a cylinder.

Disclosure of the invention

The injection module according to the invention is simple and inexpensive to produce. At the same time, the injection module according to the invention has a low weight. The interaction of upper part and lower part of the assembly can be very simplistic, while a safe and reliable recording of injection elements is possible.

The injection module according to the invention comprises an upper part and a lower part. It is provided that the upper part has at least two first receptacles and one associated with each first receptacle first opening. The lower part has at least two second receptacles and a second opening associated with each second receptacle. It is provided that an injection element in each case a first receptacle and a second receptacle is used. In this way, fluid, in particular a fuel gas, particularly advantageously natural gas (compressed natural gas, CNG) can be transported between the first receptacle and the second receptacle. By using an injection element, a fluid flow between the first opening associated with the first receptacle and the second receptacle associated with the second opening can be prevented and released. It is provided that the injection element is in particular not necessarily part of the injection module according to the invention. Furthermore, it is provided that the upper part has a fluid inlet, which is connected to each first opening. A fluid, in particular a fuel gas, particularly advantageously natural gas, can be transported to each first opening via the fluid inlet. The base has a plurality of fluid outlets, each fluid outlet being connected to a second opening. Each fluid outlet is thus individually controllable by the attachment of an injection element, whereby each fluid outlet is independent of any other fluid outlet. In particular, it is provided that exactly one fluid inlet is present, while for each second opening exactly one fluid outlet is present. Thus, via a central fluid supply, in particular fuel gas supply, particularly advantageous natural gas supply, the fluid, in particular the fuel gas, particularly advantageously the natural gas, the injection module via the one inlet perform. Depending on the number of first recordings and second recordings, a different multiplicity of fluid outlets can be provided, wherein each fluid outlet can be individually controlled. For driving each fluid outlet, an injection element between the upper part and lower part is to be introduced into the first receptacle and the second receptacle.

The dependent claims show preferred developments of the invention to the content.

It is preferably provided that the upper part and the lower part are positively connected and / or cohesively and / or non-positively connected. It is advantageously provided that upper part and lower part are separate components that are connected in an assembly step. Particularly advantageously, the connection is detachable, so that a disassembly of the injection module is possible.

The upper part advantageously has at least one first plug-in element, while the lower part advantageously has a second plug-in element. It is provided that the first male element and the second male element along one insertion direction are inserted into each other. In this way, a relative movement between the upper part and lower part except for the insertion direction can be prevented. In order additionally to prevent a relative movement along the plug-in direction, a securing element is provided, which can be inserted both into the first plug-in element and into the second plug-in element. By the securing element, a release of the first male member and the second male member is prevented, so that a Relative movement between the upper part and lower part is completely prevented. This means that upper part and lower part are firmly connected. The connection is thus in particular form-fitting. It is provided that by providing the first male and the second male and the fuse element, the connection between the upper part and lower part can be performed very easily, inexpensively and with little effort. Advantageously, the securing element is rotationally symmetrical. Particularly advantageous is also provided that the securing element is cylindrical. Furthermore, it is particularly advantageous that the first male element and the second male element each comprise a bore, wherein the securing element can be performed through the holes. The holes are oriented in particular perpendicular to the insertion direction, in which the first male and the second male member must be moved to insert the first male and the second male into one another. Securing element and bore in particular form a press fit, so that the securing element is held by the first male element and the second male element within the bore. In addition, a play-free connection of the upper part and lower part is made possible.

Particularly advantageously, the securing element is hollow. This allows a mounting member for mounting the injection module by the securing element is feasible. Thus, the injection module in a simple and cost-effective manner to other components, in particular on an engine block, fastened. By the sleeve-shaped design of the fuse element can be carried out in particular screws through the fuse element. This makes it possible that no additional mounting eyelets must be present on the injection module. At the same time, the first plug-in element, the second plug-in element and the securing element can each be made robust, as a result of which the robustly designed components are minimized. Thus, the entire holding functionality of both the upper part and the lower part with each other and the entire injection module to a further component, by a few components, in particular by only the first male element, the second male element and the fuse element, realized. All other components outside the injection module can therefore be manufactured to save material and without consideration of a required strength for holding the injection module.

The upper part advantageously has an upper body part with a fluid distributor arranged inside the upper part body. The fluid distributor serves to uniformly distribute a fluid, in particular a fuel gas, particularly advantageously natural gas, from the fluid inlet to the first openings. Particularly advantageously, the fluid distributor is tubular, wherein all first openings branch off from the tubular fluid distributor.

The upper part and / or the lower part advantageously have a temperature sensor and / or a pressure sensor for detecting a temperature and / or a pressure of the fluid flowing through the upper part and / or lower part, in particular fuel gas, particularly advantageously natural gas. Particularly advantageously, the pressure sensor and / or temperature sensor is attached to the fluid distributor described above, so that with a single temperature sensor and / or pressure sensor, a temperature and / or pressure of the total supplied fluid, in particular fuel gas, particularly advantageous natural gas, can be detected. For this purpose, the fluid distributor advantageously has an additional opening through which the temperature sensor and / or the pressure sensor can be guided. Temperature sensor and / or pressure sensor are then advantageously connected via a mounting element, in particular via screws, with the upper part. Alternatively, a connection between the temperature sensor and / or pressure sensor and upper part via positive and / or cohesive methods is possible.

The lower part advantageously comprises a lower part main body and connecting lines arranged within the lower part main body for connecting one fluid outlet each having a second opening. The independent connection lines ensure that each fluid outlet is connected to exactly one second opening independently of any other fluid outlet. Thus, the fluid outlets are all independently formed.

The upper part and / or the lower part are in particular made of plastic. This advantageously means that the above-described upper body and / or the lower body described above are made of a plastic. In particular, the upper part and / or the lower part, in particular the upper part main body and / or the lower part main body, are injection-molded plastic parts. The upper part and / or the lower part, in particular the upper part main body and / or the lower part main body are advantageously made of the same plastic. By manufacturing plastic, the injection module is constructed very compact and weight saving.

In each case, an injection element is preferably accommodated by a respective first receptacle and a second receptacle. Thus, a fluid flow from the first intake to the second Recording, that is, from the fluid inlet to the respective fluid outlet, regulated by the injection element. In particular, known injection devices, also known as injectors, can be used as the injection element.

Finally, the invention relates to an internal combustion engine comprising an injection module as described above. Due to the compact and weight-saving design of the injection module, the injection module can be attached to different points of the internal combustion engine. The attachment is simplified by the previously described advantageous embodiment of the securing element. Furthermore, the injection module can be flexibly arranged on the internal combustion engine due to the previously described small size and low weight, so that design requirements of the internal combustion engine can be taken into account with little effort.

The injection module according to the invention is thus easy and inexpensive to manufacture and in particular has a small number of components. In particular, the injection module has only one upper part, one lower part and, for each pair of first insertion element and second insertion element, a securing element. Due to this small number of components, the injection module can be mounted quickly and with little effort. By manufacturing the upper part and the lower part made of plastic, in particular of a polyamide, the injection module is also very inexpensive to manufacture.

Short description of the drawing (s)

Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings. In the drawing is:

1 1 is a schematic illustration of an injection module according to an embodiment of the invention,

2 a schematic exploded view of the injection module according to the embodiment of the invention,

3 a schematic sectional view of a portion of the injection module according to the embodiment of the invention, and

4 a schematic illustration of a part of an internal combustion engine according to an embodiment of the invention.

Embodiment (s) of the invention

1 schematically shows an injection module 1 according to an embodiment of the invention. The injection module 1 is in 2 also shown in an exploded view. There 1 and 2 the same injection module 1 show 1 and 2 described together below.

The injection module 1 according to the embodiment of the invention comprises an upper part 2 as well as a lower part 3 , The top 2 and the lower part 3 each have a base body, so that the upper part 2 a shell basic body 15 and the lower part 3 a subpart body 16 having. The shell body 15 and the subpart body 16 are made of a plastic, wherein the plastic is in particular a polyamide.

Between shell 2 and lower part 3 are four injection elements 8th arranged. The injection elements 8th are via a plug connection 20 connectable with an engine control, not shown, to dose an injection quantity. Here are the injection elements 8th in particular, such elements as are known from the prior art.

For receiving the injection elements 8th has the top 2 a first shot 4 on. The lower part 3 has a second shot 5 for each injection element 8th on. Thus, every injection element 8th in both a first shot 4 as well as a second shot 5 einbringbar, whereby the injection element 8th between the top 2 and the lower part 3 can be introduced. Once all the injection elements 8th in each case a first recording 4 and / or a second shot 5 are introduced, can be upper part 2 and lower part 3 connect with each other. This is indicated by the upper part 2 first male elements 11 on while the bottom part 3 two second male elements 12 having. In each case a first male element 11 and a second male member 12 can be plugged into each other. As soon as the first male elements 11 and the second male members 12 are inserted into each other, are the injection elements 8th through the first shots 4 and through the second shots 5 between the shell 2 and the lower part 3 fixed.

To a release of the insertion between the first male 11 and second male element 12 To prevent is for each pair of first male 11 and second male element 12 a fuse element 13 available. Thus, the injection module 1 two security elements 13 on. The security elements 13 are rotationally symmetrical about a central axis, wherein the securing elements 13 sleeve-shaped, in particular hollow cylindrical, formed are. The security elements 13 can be through holes in the first plug-in elements 11 and the second male members 12 carry out. It is envisaged that between the holes and the fuse elements 13 a press fit is present so that the securing elements 13 within the holes of the first male elements 11 and the second male members 12 are held. At the same time, a release of the plug-in connection between the first male element 11 and second male element 12 not possible anymore. Thus, top are 2 and lower part 3 connected with each other. This connection is positive and can be removed by removing the security elements 13 solve again.

The injection module 1 has a fluid inlet 9 on. The fluid inlet 9 the only way is a fluid, especially natural gas, the injection module 1 supply. The fluid inlet 9 is at the top 2 appropriate. At the fluid inlet 9 extends a fluid distributor 22 , what in 3 is shown. 3 is a sectional view through a part of the upper part 2 as well as the lower part 3 , top 2 and lower part 3 are shown in exploded view. On a representation of the injection elements 8th was waived.

The fluid distributor 22 is tubular inside the shell 2 arranged, wherein a plurality of first openings 6 from the fluid manifold 22 branch. It is envisaged that for every first shot 4 a first opening 6 is assigned to the fluid distributor 22 with the first shot 4 combines. In this way, the injection element can be 8th that in the respective first recording 4 is absorbed, the fluid passing through the fluid inlet 9 the fluid distributor 22 was fed.

The lower part 3 has a plurality of fluid outlets 10 on. It is envisaged that each fluid outlet 10 exactly a second shot 5 and thus exactly one injection element 8th assigned. The fluid outlets 10 are each via an individual connection line 23 as well as a second opening 7 with the respective second recording 5 connected. This ensures that every fluid outlet 10 independent of any other fluid outlet 10 with just a second shot 5 and therefore with exactly one injection element 8th connected is. This allows control of fluid flow through each fluid outlet 10 independent of any other fluid outlet 10 , Thus, by means of the injection elements 8th In particular, an injection amount and an injection timing for different cylinders of an internal combustion engine independently control.

Finally, it is provided that the injection module 1 a sensor module 21 having. The sensor module 21 includes in particular a temperature sensor and / or a pressure sensor. The sensor module 21 is in particular via an opening, not shown, with the fluid distributor 22 connected, so the sensor module 21 in particular a temperature and / or a pressure of the inside of the fluid distributor 22 can detect fluid located. About another plug connection 24 is the sensor module 21 connectable with a motor control. Furthermore, it is provided that the sensor module 21 with the shell 2 is screwed. Thus, the sensor module 21 safe and reliable on the top 2 attached.

The security elements 13 are hollow. Thus, fasteners can be 14 (see. 4 ), in particular screws, by the securing elements 13 carry out. This simplifies a mounting of the injection module 1 on other components.

In 4 is an internal combustion engine 4 shown according to an embodiment of the invention. The internal combustion engine 4 includes the injection module 1 like in the 1 to 3 shown. For fixing the injection module 1 on the internal combustion engine 17 are fasteners 14 in the form of screws through the security elements 13 guided and bolted to corresponding mating threads within the engine. The internal combustion engine has four cylinders 18 on, with the injection module 1 four injection elements 8th and thus a fluid inlet 9 and four fluid outlets 10 having.

For connecting each cylinder 18 with a fluid outlet 10 are connecting cables 19 available. Thus, exactly one cylinder 18 with exactly one fluid outlet 10 connected so that a quantity of injected fluid in each cylinder 18 through the respective associated injection element 8th can be adjusted. Due to the design of the injection module 1 as a weight-saving, small and compact unit, the injection module can be 1 anywhere on the internal combustion engine 1 Attach. Thus, the injection module 1 to existing design requirements of the internal combustion engine 17 be adjusted.

Because the injection module 1 also includes only a few components, is an assembly of the injection module 1 fast and low effort feasible. By using plastic, especially polyamide, is the injection module 1 also very inexpensive to manufacture and thus reduces the overall cost of the engine 17 ,

Claims (10)

Injection module ( 1 ) - an upper part ( 2 ) and a lower part ( 3 ), - the upper part ( 2 ) at least two first recordings ( 4 ) and one each first recording ( 4 ) associated first opening ( 6 ), the lower part ( 3 ) at least two second recordings ( 5 ) and one every second recording ( 5 ) associated second opening ( 7 ), wherein in each case a first recording ( 4 ) and a second recording ( 5 ), an injection element ( 8th ) for selectively preventing or releasing a fluid flow between the first receptacle ( 4 ) associated first opening ( 6 ) and the second recording ( 5 ) associated second opening ( 7 ), the upper part ( 2 ) a fluid inlet ( 9 ) provided with each first opening ( 6 ), the lower part ( 3 ) a plurality of fluid outlets ( 10 ), and - each fluid outlet ( 10 ) with a second opening ( 7 ) connected is. Injection module ( 1 ) according to claim 1, characterized in that the upper part ( 2 ) and the lower part ( 3 ) are positively connected and / or cohesively and / or non-positively connected to each other. Injection module ( 1 ) according to one of the preceding claims, characterized in that the upper part ( 2 ) at least a first male element ( 11 ) and the lower part ( 3 ) at least one second male element ( 12 ), wherein the first male element ( 11 ) and the second male element ( 12 ) are inserted into each other, and wherein a securing element ( 13 ) in both the first male element ( 11 ) as well as in the second male element ( 12 ) is insertable to a release of the inserted first male element ( 11 ) and second male element ( 12 ) to prevent. Injection module ( 1 ) according to claim 3, characterized in that the securing element ( 13 ) is sleeve-shaped, so that a mounting element ( 14 ) for mounting the injection module ( 1 ) by the securing element ( 13 ) is feasible. Injection module ( 1 ) according to one of the preceding claims, characterized in that the upper part ( 2 ) a shell body ( 15 ) with a within the body shell ( 15 ) arranged fluid distributor ( 22 ) for uniformly distributing a fluid from the fluid inlet ( 9 ) to the first openings ( 6 ) having. Injection module ( 1 ) according to one of the preceding claims, characterized in that the upper part ( 2 ) and / or the lower part ( 3 ) a temperature sensor and / or a pressure sensor for detecting a temperature and / or a pressure of the upper part ( 2 ) and / or lower part ( 3 ) has flowing fluid. Injection module ( 1 ) according to one of the preceding claims, characterized in that the lower part ( 3 ) a subpart body ( 16 ) and within the subpart body ( 16 ) arranged connecting lines ( 23 ) for connecting a respective fluid outlet ( 10 ) each having a second opening ( 7 ) having. Injection module ( 1 ) according to one of the preceding claims, characterized in that the upper part ( 2 ) and / or the lower part ( 3 ) are made of plastic. Injection module ( 1 ) according to one of the preceding claims, characterized in that in each case an injection element ( 8th ) by a respective first recording ( 4 ) and a second recording ( 5 ) is recorded. Internal combustion engine ( 17 ) comprising an injection module ( 1 ) according to any one of the preceding claims.

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