CN215338905U - Test probe and measurement system for engine - Google Patents
Test probe and measurement system for engine Download PDFInfo
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- CN215338905U CN215338905U CN202121550799.3U CN202121550799U CN215338905U CN 215338905 U CN215338905 U CN 215338905U CN 202121550799 U CN202121550799 U CN 202121550799U CN 215338905 U CN215338905 U CN 215338905U
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Abstract
The embodiment of the utility model discloses a test probe for an engine, which comprises: the probe comprises a probe body, a first pore passage and a second pore passage are arranged in the probe body, an inflation flow pipeline is arranged in the first pore passage and is communicated with an engine cylinder to detect flow, and a pressure feedback pipeline is arranged in the second pore passage and is communicated with the engine cylinder to detect pressure; the connecting piece, the connecting piece is connected with the probe body, and the connecting piece outside is provided with the external screw thread, and the test probe passes through external screw thread and engine cylinder threaded connection. The utility model also discloses a measuring system. The connecting piece of the test probe is provided with the external thread matched with the cylinder of the engine, when the test probe is used, the test probe is screwed into the cylinder through the connecting piece to realize connection, and the sensor assembly realizes detection of various sensing signals in the cylinder through the first pore channel and the second pore channel arranged at the probe; the detection efficiency of the sensing signals at the cylinder of the engine is greatly improved.
Description
Technical Field
The embodiment of the utility model relates to the technical field of engines, in particular to a test probe and a measurement system for an engine.
Background
At present, the compression ratio is mainly measured by a liquid titration method, and the corresponding compression ratio is finally calculated by measuring the volumes corresponding to the top dead center and the bottom dead center. In addition to the above-described static compression ratio test method, an acoustic probe may be used to measure data. Specifically, as disclosed in application No. 201520453947.8, it discloses an automatic online measurement device for engine compression ratio, comprising: the activity sets up detection mechanism and the bent axle actuating mechanism on the test rack, wherein: the test rack is positioned on the assembly line roller way, and the engine to be tested is arranged on the assembly line roller way in a sliding mode and sequentially passes through the test rack. The device can realize the positioning and clamping of the engine to be tested on the assembly line, the engine crankshaft is driven by the motor to drive the piston to move, and the minimum volume value and the maximum volume of the combustion chamber of the engine are found in the movement by utilizing an acoustic method volume measuring probe, so that the compression ratio of the engine is obtained. However, the above solution has two problems, the first is the inaccurate measurement problem, the piston ring and the valve of the engine are leaked substantially, and the method cannot measure the leakage value; another is that there is no way to calculate the actual compression ratio and cannot accommodate the actual production line manufacturing requirements. Therefore, it is a technical problem to be solved by those skilled in the art to design a scheme capable of adapting to a production line and obtaining various cylinder parameters of an engine in real time, especially an actual compression ratio combining air leakage of a piston ring and a valve.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a test probe for an engine, which can integrate various sensors and provide more various data detection; and the sealing performance is good, so that the measured result is more accurate.
In a first aspect, an embodiment of the present invention provides a test probe for an engine, including:
the probe comprises a probe body, a first pore passage and a second pore passage are arranged in the probe body, an inflation flow pipeline is arranged in the first pore passage and is communicated with an engine cylinder to detect flow, and a pressure feedback pipeline is arranged in the second pore passage and is communicated with the engine cylinder to detect pressure;
the connecting piece, the connecting piece is connected with the probe body, just the connecting piece outside is provided with the external screw thread, the test probe passes through external screw thread and engine cylinder threaded connection.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, the sensor module further includes a sensor module, where the sensor module includes a temperature sensor, a flow sensor, and a pressure sensor; the flow sensor is connected with the inflation flow pipeline to detect flow, the pressure sensor is connected with the pressure feedback pipeline to detect pressure, and the temperature sensor is arranged in the probe body to detect the temperature of an engine cylinder.
As an alternative implementation, in the first aspect of the embodiment of the present invention, the probe body is an insulating probe body, the connector is a metal connector, and when the probe body is connected to the connector, the shape of the probe body is a spark plug shape.
In a first aspect of this embodiment of the present invention, the first port is isolated from the second port, and the charge flow conduit is isolated from the pressure feedback conduit;
the probe body and the connecting piece are integrally formed.
As an alternative implementation, in the first aspect of the embodiment of the present invention, the testing probe further includes a sealing gasket, the sealing gasket is disposed at one end of the connector, and when the testing probe is installed at the cylinder of the engine, the sealing gasket is disposed between the connector and the cylinder.
As an alternative implementation, in the first aspect of the embodiment of the present invention, the probe body further includes a third aperture, and a temperature feedback conduit is installed in the third aperture to communicate with the engine cylinder for temperature measurement.
As an alternative, in the first aspect of the embodiments of the present invention, the probe body has a cylindrical tubular portion, a cavity is formed in the middle of the tubular portion, the end of the tubular portion is disposed on the fixing portion, and the fixing portion is provided with the first and second hole passages.
As an alternative implementation manner, in the first aspect of the embodiment of the present invention, the test probe further includes an annular sealing ring, the peripheral side wall of the tubular portion is provided with an annular groove, the annular sealing ring is disposed in the annular groove, and when the connecting piece and the probe body are fixedly installed, the annular sealing ring is installed between the annular groove and the annular sealing ring in an interference manner.
As an alternative implementation manner, in the first aspect of the embodiment of the present invention, the number of the annular grooves and the number of the annular seal rings are both two.
In a first aspect, embodiments of the present invention provide a measurement system, including a test probe and a processing module for an engine according to any one of the objects of the present invention; the sensor assembly at the test probe is used to transmit the sensed sensor signals to the processing module.
The connecting piece of the test probe is provided with the external thread matched with the cylinder of the engine, when the test probe is used, the test probe is screwed into the cylinder through the connecting piece to realize connection, and the sensor assembly realizes detection of various sensing signals in the cylinder through the first pore channel and the second pore channel arranged at the probe; the detection efficiency of the sensing signals at the cylinder of the engine is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a test probe for an engine according to an embodiment of the present invention;
FIG. 2 is an exploded view of a test probe for an engine according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a probe body according to an embodiment of the present invention;
FIG. 4 is another schematic structural diagram of a probe body according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a connector according to an embodiment of the present invention;
fig. 6 is another schematic structural diagram of a connector provided in an embodiment of the present invention.
Reference numerals: 1. a probe body; 11. a tubular portion; 111. a cavity; 112. an annular groove; 12. a fixed part; 121. a first duct; 122. a second duct; 123. a third porthole; 2. a connecting member; 21. installing a channel; 3. sealing gaskets; 4. an annular seal ring; 5. an inflation flow conduit; 6. a pressure feedback conduit; 7. a temperature feedback conduit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment. Except as specifically noted, the materials and equipment used in this example are commercially available. Examples of embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.
In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "connected," "communicating," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 1 is a schematic structural diagram of a test probe for an engine according to an embodiment of the present invention, and fig. 2 is a schematic exploded structural diagram of a test probe for an engine according to an embodiment of the present invention, as shown in fig. 1 and fig. 2, a test probe for an engine according to an embodiment of the present invention includes:
the probe comprises a probe body 1, wherein a first pore passage 121 and a second pore passage 122 are arranged in the probe body 1, an inflation flow pipeline 5 is arranged in the first pore passage 121 to be communicated with an engine cylinder for flow detection, and a pressure feedback pipeline 6 is arranged in the second pore passage 122 to be communicated with the engine cylinder for pressure detection;
and the connecting piece 2 is connected with the probe body 1, an external thread is arranged outside the connecting piece 2, and the test probe is connected with the engine cylinder through the external thread.
Specifically, the probe body 1 and the connecting piece 2 are fixedly sleeved, and after the probe body and the connecting piece are fixed, the external thread of the connecting piece 2 and the internal thread of the cylinder can be rotationally clamped, so that the probe is fixed on the cylinder; because the probe body 1 is provided with two pore canals, an external sensor can be communicated with the interior of the cylinder through the pore canals. When the probe body 1 and the connecting piece 2 are installed, the connecting piece 2 is sleeved with the probe body 1 through the installation channel 21 on the connecting piece, so that the connecting piece and the probe body are in complete contact. The probe body 1 and the connecting piece 2 are designed to relatively rotate, and the probe body 1 and the connecting piece 2 are designed to relatively rotate. When the probe is screwed to a spark plug mounting port of a cylinder, the probe body 1 cannot rotate because the pipeline and the sensor are arranged on the probe body 1, and otherwise the pipeline is knotted and broken. Therefore, the mounting of the entire probe to the spark plug hole is achieved by fixing the probe body 1 and rotating the connector 2. In the specific implementation, a pressing mode can be designed to press the probe on the spark plug hole to realize sealing, so that the same effect as screw tightening is realized.
More preferably, the device further comprises a sensor assembly, wherein the sensor assembly comprises a temperature sensor, a flow sensor and a pressure sensor; the flow sensor is connected with the inflation flow pipeline 5 for flow detection, the pressure sensor is connected with the pressure feedback pipeline 6 for pressure detection, and the temperature sensor is arranged in the probe body 1 for temperature detection of an engine cylinder.
The scheme of the utility model mainly aims to measure various sensing parameters in the cylinder; therefore, when the sensor assembly is arranged, the sensor assembly can be directly arranged at the test probe; the specific position setting mode is as follows: the temperature sensor is positioned in the spark plug probe, and can even be exposed a little bit to be convenient for measuring the temperature in the cylinder by penetrating into the cylinder; however, in the specific implementation, the volume of the flow sensor and the volume of the pressure sensor are known to be larger, so that the temperature sensor and the flow sensor are actually positioned outside the spark plug probe (namely outside the engine), only two air pipes need to be introduced into the spark plug probe, and one air pipe is used for communicating the charging flow, namely is connected with the flow sensor to measure the flow; one is used for pressure feedback, i.e. for pressure measurement in connection with a pressure sensor.
More preferably, the probe body 1 is an aluminum alloy probe body; in the design, the thermocouple is provided with an insulating layer, and flow and pressure channels do not need to be insulated. The connecting piece 2 is a metal connecting piece 2, and when the probe body 1 is connected with the connecting piece 2, the shape of the probe body is a spark plug shape. The spark plug is directly made into the shape and the material which are the same as those of the spark plug, so that the actual operation scene can be more truly simulated, and the cylinder parameters can be more accurately measured. The probe body 1 is an electric insulation inner core with multiple channels, and is arranged in the metal connecting piece 2, the channels on the probe body are provided with sensor components, and all the channels are separated by wall surfaces and are mutually separated; when the cylinder is inflated, the independent inflation channel is moved, so that the detection of the pressure in the cylinder is not influenced; since they face a cylinder chamber, there is substantially no need for sealing between the passages. The electrically insulating core has a bore connected to the high pressure combustion chamber. The metal connector 2 provides a seal for mounting the pressure sensor to the engine, as well as support and sealing for internal non-metallic components.
More preferably, the first port 121 is isolated from the second port 122, and the charge flow line 5 is isolated from the pressure feedback line 6; in specific implementation, various arrangement modes are available, one mode is that two pore channels are arranged at one position, but the whole air tightness is greatly reduced due to the existence of gaps between the pore channels in the arrangement mode; therefore, when the device is arranged, the device and the method are separated, so that interference between the pore passages can be avoided, and the accuracy of measurement can be further improved.
The probe body 1 and the connecting piece 2 are integrally formed. Besides the split arrangement mode, the plastic pipe can be integrally formed; however, in practice, it is more preferable to adopt a mode in which two devices are separately provided.
More preferably, the testing probe further comprises a sealing gasket 3, wherein the sealing gasket 3 is arranged at one end of the connecting piece 2, and when the testing probe is installed at the cylinder of the engine, the sealing gasket 3 is arranged between the connecting piece 2 and the cylinder. The air tightness of the sealing gasket 3 is improved by pressing the sealing gasket between the two.
More preferably, fig. 3 is a schematic structural diagram of the probe body 1 according to the embodiment of the present invention, fig. 4 is another schematic structural diagram of the probe body 1 according to the embodiment of the present invention, as shown in fig. 3 and fig. 4, the probe body 1 has a cylindrical tubular portion 11, a cavity 111 is formed in a middle of the tubular portion 11, an end of the tubular portion 11 is disposed on the fixing portion 12, and the fixing portion 12 is disposed with a first duct 121 and a second duct 122. The exterior of the tubular part 11 is also provided with an external thread by means of which it is mounted at the cylinder. The fixing portion 12 is mainly used to fix the sensing channel thereon, specifically, to fix it at the position of the hole, and to detect each parameter in the cylinder through the hole.
More preferably, the probe body 1 further comprises a third aperture 123, to which a temperature feedback conduit 7 is mounted to communicate with the engine cylinder for temperature measurement.
More preferably, fig. 5 is a schematic structural view of the connector 2 according to the embodiment of the present invention;
fig. 6 is another schematic structural diagram of the connector 2 according to the embodiment of the present invention; as shown in fig. 5 and 6, the test probe further includes an annular sealing ring 4, the peripheral side wall of the tubular part 11 is provided with an annular groove 112, the annular sealing ring 4 is arranged in the annular groove 112, and when the connecting piece 2 and the probe body 1 are fixedly installed, the annular sealing ring 4 is installed between the two in an interference manner. Because the connecting piece 2 and the probe body 1 are not integrally formed, a gap is easily generated between the connecting piece and the probe body when the probe is installed, and the gap further generates large leakage, if the gap is not processed, finally obtained data can be greatly different from actual conditions; therefore, when the test probe is implemented, the annular sealing ring 4 is arranged in an interference manner in two times, and the overall air tightness of the test probe can be greatly improved through the annular sealing ring 4.
More preferably, the number of the annular grooves 112 and the number of the annular seal rings 4 are both two. The annular seal 4 can be fixed to the tubular portion 11 by providing the annular groove 112 and, when two annular seals 4 are provided, the overall airtightness can be made better; the accuracy of the finally measured cylinder parameters is greatly improved.
The connecting piece 2 of the test probe is provided with an external thread matched with an engine cylinder, when the test probe is used, the test probe is screwed into the cylinder through the connecting piece 2 to realize connection, and the sensor assembly realizes detection of various sensing signals in the cylinder through the first pore channel 121 and the second pore channel 122 arranged at the probe; the detection efficiency of the sensing signals at the cylinder of the engine is greatly improved.
Example two
The embodiment of the utility model provides a measuring system, which comprises a test probe and a processing module for an engine, wherein the test probe and the processing module are used for testing the engine; the sensor assembly at the test probe is used to transmit the sensed sensor signals to the processing module. The processing module is used for calculating the collected parameters to obtain corresponding working volume and compression ratio parameters. Measuring various sensing parameters in the cylinder through ventilation; and finally, calculating various sensing parameters to obtain corresponding cylinder parameters. The scheme of the embodiment of the utility model can be suitable for an engine production line, thereby greatly improving the overall production detection efficiency.
The foregoing is considered as illustrative of the preferred embodiments of the utility model and technical principles employed. The present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in more detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the claims.
Claims (10)
1. A test probe for an engine, comprising:
the probe comprises a probe body, a first pore passage and a second pore passage are arranged in the probe body, an inflation flow pipeline is arranged in the first pore passage and is communicated with an engine cylinder to detect flow, and a pressure feedback pipeline is arranged in the second pore passage and is communicated with the engine cylinder to detect pressure;
the connecting piece, the connecting piece is connected with the probe body, just the connecting piece outside is provided with the external screw thread, the test probe passes through external screw thread and engine cylinder threaded connection.
2. The test probe for an engine of claim 1, further comprising a sensor assembly, the sensor assembly comprising a temperature sensor, a flow sensor, and a pressure sensor; the flow sensor is connected with the inflation flow pipeline to detect flow, the pressure sensor is connected with the pressure feedback pipeline to detect pressure, and the temperature sensor is arranged in the probe body to detect the temperature of an engine cylinder.
3. The test probe for an engine of claim 1, wherein the connector is a metal connector and the shape of the probe body is a spark plug shape when the probe body is connected to the connector.
4. The test probe for an engine of claim 1, wherein the first port is isolated from the second port, and the charge flow conduit is isolated from the pressure feedback conduit;
the probe body and the connecting piece are integrally formed.
5. The test probe of claim 1, further comprising a gasket disposed at one end of the connector, the gasket being disposed between the connector and the cylinder when the test probe is installed at the engine cylinder.
6. A test probe for an engine according to claim 1 wherein the probe body further comprises a third port, a temperature feedback conduit being mounted in the third port for communication with an engine cylinder for temperature measurement.
7. The test probe for an engine according to claim 1, wherein the probe body has a cylindrical tubular portion, a hollow space is formed in a middle portion of the tubular portion, end portions of the tubular portion are provided at the fixing portion, and the first and second ports are provided at the fixing portion.
8. The test probe of claim 7, further comprising an annular sealing ring, wherein the peripheral sidewall of the tubular portion is provided with an annular groove, and the annular sealing ring is disposed in the annular groove and is interference fit therebetween when the connector is fixedly mounted with the probe body.
9. The test probe for an engine of claim 8, wherein the number of the annular groove and the annular seal ring is two.
10. A measurement system comprising the test probe and the processing module for an engine of claim 2; the sensor assembly at the test probe is used to transmit the sensed sensor signals to the processing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121550799.3U CN215338905U (en) | 2021-07-08 | 2021-07-08 | Test probe and measurement system for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121550799.3U CN215338905U (en) | 2021-07-08 | 2021-07-08 | Test probe and measurement system for engine |
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| Publication Number | Publication Date |
|---|---|
| CN215338905U true CN215338905U (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121550799.3U Active CN215338905U (en) | 2021-07-08 | 2021-07-08 | Test probe and measurement system for engine |
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| CN (1) | CN215338905U (en) |
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2021
- 2021-07-08 CN CN202121550799.3U patent/CN215338905U/en active Active
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