CN218669554U

CN218669554U - Combustion chamber structure with cylinder pressure sensor and sealing device thereof

Info

Publication number: CN218669554U
Application number: CN202222840628.5U
Authority: CN
Inventors: 杨凌洁; 汪文广; 梁源飞
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-03-21
Anticipated expiration: 2032-10-27

Abstract

The utility model discloses a combustion chamber structure with a cylinder pressure sensor, which comprises a device main body, a combustion chamber and a cylinder pressure sensor, wherein the device main body comprises a shell part and the combustion chamber, and the combustion chamber is arranged inside the shell part; a mounting hole assembly provided on an upper side of the apparatus main body and including a mounting hole member and a sensor member; and a sealing assembly including a sheath member disposed inside the mounting hole member. The utility model discloses beneficial effect: the utility model discloses a set up on the cylinder cap and pass the side formula mounting hole of cylinder cap bottom, the side formula mounting hole is located cylinder cap top surface oil pocket, accesss to the combustion chamber rear end, adopts the jar to press sensor test jar to press, and reliability and accuracy are higher, and stability is good, and the jar that can be more real in the reflection test process presses the value, is convenient for detect the detonation.

Description

Combustion chamber structure with cylinder pressure sensor and sealing device thereof

Technical Field

The utility model relates to an automobile sensor field, especially a take jar to press sensor combustion chamber structure and sealing device thereof.

Background

Knocking is an abnormal combustion phenomenon, and effective knocking detection has important significance for improving the dynamic property and the economical efficiency of the automobile. The prior art adopts spark plug formula cylinder pressure sensor to carry out knock detection, has following problem: at present, two common knock detection methods are available: firstly, knocking information is extracted through a vibration signal of the surface of an engine body; and secondly, extracting knock information through the combustion pressure signal of the engine. The existing knock signal detection is realized by carrying a special spark plug type sensor, and the knock signal cannot truly reflect the pressure value of a test cylinder. The prior art has the following defects: the spark plug type sensor is provided with a spark plug at the same time, has high requirements on functions and manufacture and cannot truly reflect the pressure value of the tested cylinder; the special spark plug type sensor has higher cost; the sealing is required to be considered, the requirement for installing the sealing is high, and the leakage is easy to occur.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

In view of the manufacturing cost who exists among the above-mentioned current area spark plug formula sensor is high, can not direct true problem of reflection experimental jar pressure value, has provided the utility model discloses.

In order to solve the technical problem, the utility model provides a following technical scheme: a combustion chamber structure with a cylinder pressure sensor comprises a device body, a combustion chamber and a gas-liquid separator, wherein the device body comprises a shell part and the combustion chamber; a mounting hole assembly provided on an upper side of the apparatus main body and including a mounting hole member and a sensor member; and a sealing assembly including a sheath member disposed inside the mounting hole member.

As a preferable scheme of taking cylinder pressure sensor combustion chamber structure, wherein: the shell component comprises a cylinder cover and a cover cap which are mutually matched and connected; and an oil injector hole is formed in one side of the cylinder cover, the combustion chamber is opposite to the oil injector hole, and a spark plug hole is formed in the middle position of the combustion chamber and the oil injector hole.

As a preferred scheme of taking cylinder pressure sensor combustion chamber structure, wherein: the mounting hole part comprises a cylinder pressure sensor mounting hole, and the cylinder pressure sensor mounting hole is formed in one side of the spark plug hole.

As a preferred scheme of taking cylinder pressure sensor combustion chamber structure, wherein: the sensor component comprises a cylinder pressure sensor and a combustion chamber height detection point, the cylinder pressure sensor is arranged in a cylinder pressure sensor mounting hole, and the combustion chamber height detection point is arranged on one side of the cylinder pressure sensor mounting hole.

As a preferred scheme of taking cylinder pressure sensor combustion chamber structure, wherein: and the other side of the spark plug hole is provided with a combustion chamber height detection point, and the two combustion chamber height detection points are arranged oppositely.

As a preferable scheme of taking cylinder pressure sensor combustion chamber structure, wherein: the cylinder pressure sensor mounting hole is arranged to be a stepped hole and is located in the middle of an intake valve seat ring and an exhaust valve seat ring of a cylinder cover combustion chamber and at the rear end of a fire wall position.

The utility model has the advantages that: the utility model discloses a set up on the cylinder cap and pass the side formula mounting hole of cylinder cap bottom, the side formula mounting hole is located cylinder cap top surface oil pocket, accesss to the combustion chamber rear end, adopts the jar to press sensor test jar to press, and reliability and accuracy are higher, and stability is good, and the jar that can be more real in the reflection test process presses the value, is convenient for detect the detonation.

In view of the above-mentioned installation that exists among the current spark plug formula sensor of taking is sealed to require highly, easily takes place to reveal the problem that leads to influence data, has proposed the utility model discloses.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a take cylinder pressure sensor sealing device which characterized in that: the combustion chamber structure with the cylinder pressure sensor is included; and a sealing assembly including a sheath member disposed inside the mounting hole member.

As a preferred scheme of taking cylinder pressure sensor sealing device, wherein: the sheath component comprises a sheath and an O-shaped ring, and the contact position of the cover cap is sealed by the O-shaped ring.

As a preferred scheme of taking cylinder pressure sensor sealing device, wherein: the cylinder pressure sensor is fitted in a jacket, the tip of the jacket sleeve being close to the combustion chamber and not protruding out of the combustion chamber.

As a preferred scheme of taking cylinder pressure sensor sealing device, wherein: the contact area of the cover cap and the cylinder cover needs to be sealed through an O-shaped ring.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:

fig. 1 is a schematic sectional view of the whole structure of the embodiment of the combustion chamber structure with cylinder pressure sensor and the sealing device thereof of the present invention.

Fig. 2 is a schematic view of the structure of the hole assembly installed in the cylinder head provided by the combustion chamber structure with the cylinder pressure sensor and the sealing device thereof of the present invention.

Fig. 3 is a side section view showing the structure of the combustion chamber with cylinder pressure sensor and the sealing device thereof.

Fig. 4 is the sealing assembly local detonation schematic diagram provided by the sealing device with the cylinder pressure sensor of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 3, for a first embodiment of the present invention, there is provided an overall structure schematic diagram of a combustion chamber structure with a cylinder pressure sensor, as shown in fig. 1, the overall structure of the present invention includes a device main body 100, including a housing part 101 and a combustion chamber 102, the housing part 101 includes a cylinder head 101a and a cover 101b, the cylinder head 101a and the cover 101b are mutually connected in a matching manner; an oil injector hole 103 is formed in one side of the cylinder cover 101a, the combustion chamber 102 is arranged opposite to the oil injector hole 103, a spark plug hole is formed in the middle of the combustion chamber 102 and the oil injector hole 103, and the combustion chamber 102 is arranged inside the shell part 101; the mounting hole assembly 200, set up in the upside of the apparatus body 100, including mounting hole part 201 and sensor part 202, the mounting hole part 201 includes the cylinder pressure sensor mounting hole 203, the cylinder pressure sensor mounting hole 203 sets up in the spark plug hole side, the sensor part 202 includes the cylinder pressure sensor 204 and the high detection point of combustion chamber 205, the cylinder pressure sensor 204 sets up inside the cylinder pressure sensor mounting hole 203, the high detection point of combustion chamber 205 sets up in the cylinder pressure sensor mounting hole 203 side, and, the seal assembly 300, including the sheathing part 301, set up in the inboard of the mounting hole part 201.

Specifically, in this embodiment, the combustion chamber 102 is a four-stroke gasoline engine combustion chamber 102, the combustion chamber 102 is disposed inside the cover 101b, a piston and a crankshaft connecting rod mechanism are disposed at one end of the cover 101b, which is far away from the cylinder head 101a, the cylinder head 101a and the cover cooperate to form the complete combustion chamber 102, two pairs of intake channels 105 and exhaust channels 106 are symmetrically disposed in one end of the cylinder head 101a, which is close to the cover, a spark plug hole is disposed at a center position of the two pairs of intake channels 105 and exhaust channels 106 in the cylinder head 101a, a spark plug is mounted in the spark plug hole, an injector hole 103 is disposed at a side portion of the cylinder head 101a, an injector is disposed in the injector hole 103, an injector injection point is directly opposite to an ignition position of the spark plug, a cylinder pressure sensor mounting hole 203 is disposed outside centers of the intake channels 105 and the exhaust channels 106 in the cylinder head 101a, and the cylinder pressure sensor 204 is disposed in the cylinder pressure sensor mounting hole 203.

Specifically, when the pressure in the combustion chamber 102 is abnormal due to abnormal combustion caused by over-advanced ignition angle, incorrect air-fuel ratio and the like in the engine, the cylinder head 101a and the head cover vibrate, and the cylinder pressure sensor 204 in the cylinder head 101a can directly contact the engine to generate a knocking point due to being positioned in the combustion chamber 102, so that the knocking frequency of the engine is detected, and the accuracy of the test is improved.

Example 2

The second embodiment of the present invention refers to fig. 3 to 4, and this embodiment is different from the first embodiment: the device hole assembly 200 is arranged on the upper side of the device body and comprises a mounting hole part 201 and a sensor part 202, the sensor part 202 comprises a cylinder pressure sensor 204 and a combustion chamber height detection point 205, the cylinder pressure sensor 204 is arranged inside a cylinder pressure sensor mounting hole 203, the combustion chamber height detection point 205 is arranged on one side of the cylinder pressure sensor mounting hole 203, the other side of a spark plug hole is provided with the combustion chamber height detection point 205 because the two combustion chamber height detection points 205 are oppositely arranged, the cylinder pressure sensor mounting hole 203 is arranged to be a stepped hole, the cylinder pressure sensor mounting hole 203 is positioned in the middle area of an intake valve seat ring and an exhaust valve seat ring of a combustion chamber 102 of a cylinder cover 101a, the rear end of a fire wall position is arranged, and the sealing assembly 300 comprises a sheath part 301 and is arranged on the inner side of the mounting hole part 201.

Specifically, in the present embodiment, the cylinder pressure sensor mounting hole 203 is located at a fire wall position in the middle area of the intake and exhaust valve seat ring of the combustion chamber 102 of the cylinder head 101a, and is close to the rear end, when the cylinder pressure sensor 204 is mounted, a stepped hole for mounting the sheath 302 needs to be machined on the cylinder head 101a first, so as to ensure that the sheath 302 can be accurately mounted on the cylinder head 101a, and meanwhile, the structure also has a sealing effect, and the tip of the sleeve passing through the sheath 302 should be close to the combustion chamber 102 as much as possible, but cannot extend out of the combustion chamber 102 at the same time, so as to ensure that the shape of the sleeve is consistent with that of the combustion chamber 102.

Specifically, in the embodiment, the cylinder pressure sensor 204 is a piezoelectric resonance type sensor, the material is heat-resistant ceramic, when the engine knocks, the ceramic in the cylinder pressure sensor 204 is extruded to generate an electric signal which is consistent with the inherent frequency of the sensor to generate resonance, the sensor generates a knock signal voltage and transmits the knock signal voltage to the ECU, the ECU corrects the ignition time in time and corrects the knock phenomenon in time, holes are formed in the cylinder cover 101a at proper positions, the problems of high cost and the like are solved, the test accuracy is guaranteed, and the performance is not affected while the test result is guaranteed.

The rest of the structure is the same as in example 1.

Example 3

The third embodiment of the present invention refers to fig. 3 to 4, and is different from the first and second embodiments in that: the sealing assembly 300 comprises a sheath component 301, the sheath component 301 comprises a sheath 302 and an O-ring 303, the contact position of the cover cap 101b is sealed by the O-ring 303 and is arranged on the inner side of the mounting hole component 201, the cylinder pressure sensor is assembled in the sheath 302, the tip of the sleeve of the sheath 302 is close to the combustion chamber 102 and does not extend out of the combustion chamber 102, and the contact area of the cover cap 101b and the cylinder cover 101a needs to be sealed through the O-ring 303.

Specifically, the cylinder pressure sensor mounting hole 203 penetrates through the water jacket and the oil cavity, meanwhile, the design of the sheath 302 is adopted, the sealing requirement of the cylinder pressure sensor is guaranteed, the testing accuracy is improved, the cylinder pressure sensor mounting hole 203 is located in the middle area of the intake and exhaust valve seat ring of the combustion chamber 102 of the cylinder cover 101a, namely the fire wall position and is close to the rear end, the cylinder pressure sensor 204 is assembled in the sheath 302, the sealing effect is achieved, the interference of lubricating oil and cooling liquid is prevented, and the accuracy of the detection result is prevented from being influenced.

Specifically, in this embodiment, a stepped hole for installing the sheath 302 is processed on the cylinder head 101a to ensure that the sheath 302 can be accurately installed on the cylinder head 101a, and the structure also has a sealing effect, the tip of the sleeve passing through the sheath 302 should be as close to the combustion chamber 102 as possible, but cannot extend out of the combustion chamber 102 at the same time, and needs to be consistent with the shape of the combustion chamber 102 to ensure that the measurement result is accurate, the sheath 302 needs to pass through the cover 101b and the cylinder head 101a, and the contact area between the cover 101b and the cylinder head 101a needs to be sealed through the O-ring 303, so that convenience in installation and disassembly is ensured, secondary use of the cylinder pressure sensor 204 is not affected, gaps between the cylinder pressure sensor and the water jacket and the oil chamber do not need to be considered, and no leakage risk exists.

The rest of the structure is the same as in example 1.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible, variations in mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described.

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a take cylinder pressure sensor combustion chamber structure which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

an apparatus main body (100) including a housing part (101) and a combustion chamber (102), the combustion chamber (102) being provided inside the housing part (101); and the number of the first and second groups,

and a mounting hole assembly (200) which is provided on the upper side of the apparatus main body (100) and includes a mounting hole member (201) and a sensor member (202).

2. The combustion chamber structure with cylinder pressure sensor according to claim 1, characterized in that: the shell part (101) comprises a cylinder cover (101 a) and a cover cap (101 b), and the cylinder cover (101 a) and the cover cap (101 b) are mutually matched and connected;

an oil sprayer hole (103) is formed in one side of the cylinder cover (101 a), the combustion chamber (102) and the oil sprayer hole (103) are arranged oppositely, and a spark plug hole (104) is formed in the middle of the combustion chamber and the oil sprayer hole.

3. The combustion chamber structure with cylinder pressure sensor according to claim 1, characterized in that: the mounting hole part (201) comprises a cylinder pressure sensor mounting hole (203), and the cylinder pressure sensor mounting hole (203) is arranged on one side of the spark plug hole (104).

4. The combustion chamber structure with cylinder pressure sensor according to claim 1 or 3, characterized in that: the sensor component (202) comprises a cylinder pressure sensor (204) and a combustion chamber height detection point (205), the cylinder pressure sensor (204) is arranged inside a cylinder pressure sensor mounting hole (203), and the combustion chamber height detection point (205) is arranged on one side of the cylinder pressure sensor mounting hole (203).

5. The combustion chamber structure with cylinder pressure sensor according to claim 3, characterized in that: the other side of the spark plug hole (104) is provided with a combustion chamber height detection point (205), and the two combustion chamber height detection points (205) are arranged oppositely.

6. The structure of the combustion chamber with cylinder pressure sensor according to claim 5, wherein: the cylinder pressure sensor mounting hole (203) is arranged to be a stepped hole, and the cylinder pressure sensor mounting hole (203) is located in the middle area of an intake valve seat ring and an exhaust valve seat ring of a combustion chamber (102) of a cylinder cover (101 a) and at the rear end of a fire wall position.

7. The utility model provides a take cylinder pressure sensor sealing device which characterized in that: comprising the combustion chamber structure with cylinder pressure sensor according to any one of claims 1 to 6; and the number of the first and second groups,

a seal assembly (300) including a sheath member (301) disposed inside the mounting hole member (201).

8. The cylinder pressure sensor-equipped seal device according to claim 7, wherein: the sheath member (301) includes a sheath (302) and an O-ring (303), the O-ring (303) being disposed at a contact position of the cover cap (101 b).

9. The cylinder pressure sensor-equipped seal device according to claim 7, wherein: the cylinder pressure sensor (204) is mounted in a sheath (302), and the tip of the sleeve of the sheath (302) is close to the combustion chamber (102) and does not extend out of the combustion chamber (102).

10. The cylinder pressure sensor-equipped seal device according to claim 8, wherein: the contact area of the cover cap (101 b) and the cylinder cover (101 a) needs to be sealed through an O-shaped ring (303).