Sensor, engine electronic control system and automobile

Abstract

The utility model discloses a sensor which is used for being installed on a cylinder body, the cylinder body comprises an installation hole, and the sensor comprises a sensor head used for stretching into the installation hole of the cylinder body; the supporting part and the sensor head are integrally formed; the supporting part comprises a first supporting part and a second supporting part, and the first supporting part and the second supporting part are located on the side faces of the sensor head respectively; the first supporting part and the second supporting part can be in interference fit with the inner wall of the mounting hole. According to the utility model, the sensor can be stably supported in the cylinder body, and the cost caused by the O-shaped ring is reduced. The utility model further provides an engine electronic control system and an automobile.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a sensor, an engine electronic control system and an automobile. Background Art

[0002] Automobile engine sensors are key components in modern automobile engine management systems. They are responsible for monitoring and controlling various engine parameters to ensure that the car runs efficiently and safely.

[0003] Most of the engine sensors on the market are equipped with O-rings, which can prevent oil leakage in the cylinder and support the sensor in the cylinder through the extrusion of the O-rings. However, many engine sensors are installed in cylinders without oil or with low sealing requirements. In this case, the sealing function of the sensor O-ring is not needed. If sensors with O-rings are still used at this time, it will cause waste and generate unnecessary labor costs and process control costs. Utility Model Content

[0004] The utility model aims to solve the problem of supporting a sensor in a cylinder body that does not require a sensor O-ring for sealing. The utility model provides a sensor, an engine electronic control system and a car, which can stably support the sensor in the cylinder body and reduce the cost caused by the O-ring.

[0005] In order to solve the above technical problems, an embodiment of the utility model discloses a sensor for being installed on a cylinder body, the cylinder body comprising a mounting hole, and the sensor comprising: a sensor head for extending into the mounting hole of the cylinder body; a support portion integrally formed with the sensor head; the support portion comprising a first support portion and a second support portion, the first support portion and the second support portion are respectively located on the sides of the sensor head; the first support portion and the second support portion can respectively be interference fit with the inner wall of the mounting hole.

[0006] By adopting the above technical solution, the first supporting part and the second supporting part are respectively provided on the sides of the sensor head, and the first supporting part and the second supporting part are respectively interference fit with the inner wall of the mounting hole, thereby ensuring the stability of the sensor installed on the cylinder body, avoiding uneven force on both sides where the first supporting part and the second supporting part contact the inner wall of the mounting hole, or small abutment force between the first supporting part and the second supporting part and the inner wall of the mounting hole, causing the sensor head to shake in the mounting hole due to the vibration of the engine, thereby affecting the detection function of the sensor.

[0007] On the other hand, the first support part and the second support part are integrated on the sensor, and the first support part, the second support part and the sensor head are integrally injection molded, thereby avoiding the raw material procurement cost caused by the O-ring, as well as the production line labor cost and process control cost caused by the installation of the O-ring.

[0008] According to another specific embodiment of the present invention, the first supporting portion and the second supporting portion are respectively located on two side surfaces of the sensor head and are symmetrically arranged with respect to the sensor head.

[0009] By adopting the above technical solution, a first supporting part and a second supporting part symmetrical with respect to the sensor head are respectively provided on both sides of the sensor head, thereby ensuring the stability of the sensor installed on the cylinder body and avoiding uneven force on both sides of the inner wall of the mounting hole caused by the asymmetry of the first supporting part and the second supporting part, which causes the sensor head to shake in the mounting hole due to the vibration of the engine and affects the detection function of the sensor.

[0010] According to another specific embodiment of the present utility model, the first support portion and the second support portion both include an arc portion, and the highest points of the arc portions of the first support portion and the second support portion in a first direction are both in contact with the inner wall of the mounting hole, and the first direction is the relative direction of the first support portion and the second support portion.

[0011] By adopting the above technical solution, the highest point of the arc abuts against the inner wall of the mounting hole, thereby realizing a fixed connection between the sensor and the cylinder body. The arc portion design of the first support portion and the second support portion is conducive to installation guidance, that is, it is convenient to install the sensor head to the mounting hole of the cylinder body or to detach the sensor from the cylinder body.

[0012] According to another specific embodiment of the present invention, each of the first supporting portion and the second supporting portion includes a plurality of supporting portions spaced apart along the length direction of the sensor.

[0013] By adopting the above technical solution and providing a plurality of first supporting portions and a plurality of second supporting portions, it means that the sensor and the mounting hole have a plurality of connection points, thereby improving the stability of the connection between the sensor and the cylinder body.

[0014] According to another specific embodiment of the present invention, a hollow area is formed between the support portion and the sensor head.

[0015] By adopting the above technical solution, the hollow area between the support portion and the sensor head saves materials on the one hand, and also facilitates the sensor head to be pressed into the mounting hole on the other hand.

[0016] According to another specific embodiment of the present invention, the projection of the support portion in the first direction is in an S-like shape.

[0017] According to another specific embodiment of the present invention, the width of the support portion is 2 mm to 4 mm.

[0018] According to another specific embodiment of the present invention, the thickness of the support portion is 1 mm to 3 mm.

[0019] An embodiment of the utility model further discloses an electronic engine control system based on the above-mentioned sensor, comprising: a cylinder body provided with a mounting hole; and the above-mentioned sensor, wherein the first supporting portion and the second supporting portion of the sensor are respectively interference-fitted with the inner wall of the mounting hole.

[0020] The embodiment of the utility model further discloses a car based on the above engine electronic control system, including the above engine electronic control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram showing a sensor according to an embodiment of the utility model;

[0022] Figure 2 A cross-sectional view showing the installation of the sensor and the cylinder body of the embodiment of the utility model;

[0023] Figure 3 A side view of the sensor according to the embodiment of the utility model is shown;

[0024] Figure 4 The front view of the sensor of the utility model embodiment is shown. DETAILED DESCRIPTION

[0025] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0026] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0027] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0028] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0029] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] refer to Figure 1 and Figure 2 The present application provides a sensor 1 for installation on a cylinder block 2 of an engine to collect required engine parameters and indicators. Taking a crankshaft position sensor as an example, it provides an ignition timing (ignition advance angle) and a signal to confirm the crankshaft position, and is used to detect the piston top dead center, crankshaft angle and engine speed.

[0032] The sensor 1 can be not only a crankshaft position sensor, but also other engine sensors such as a camshaft position sensor. The present application takes the crankshaft position sensor as an example for explanation.

[0033] The sensor 1 includes a plastic shell 100, which includes a connector 3, a sensor head 4, a flange 5 and a support 6. The flange 5 is used to connect the connector 3 and the sensor head 4, and the wiring harness (not shown in the figure) in the connector 3 is used to be electrically connected to the automotive electronic control unit.

[0034] The plastic shell 100 is integrally formed by injection molding. That is, the support portion 6 and the sensor head 4 are integrally formed by injection molding, thereby ensuring a reliable connection between the support portion 6 and the sensor head 4.

[0035] In this embodiment, the plastic shell 100 of the sensor 1 is made of polyphenylene sulfide (PPS), which is a new type of high-performance thermoplastic resin material. The support portion 6 of this material has a certain degree of elasticity.

[0036] The support portion 6 includes a first support portion 601 and a second support portion 602, which are arranged on the side of the sensor head 4. In one embodiment, the first support portion 601 and the second support portion 602 are respectively located on the two side surfaces of the sensor head 4, and are arranged symmetrically about the sensor head 4. Specifically, the sensor head 4 is in a rectangular parallelepiped shape, and the first support portion 601 and the second support portion 602 are respectively located in the width direction ( Figure 1 Of course, the support portion 6 of the present invention is not limited to the first support portion 601 and the second support portion 602, and may include multiple support portions and be respectively arranged on multiple sides of the sensor head 4. In addition, the first support portion 601 and the second support portion 602 may also be separately arranged on any two sides of the sensor head 4, which is not specifically limited here.

[0037] like Figure 2 As shown, the sensor head 4 extends into the mounting hole 200 of the cylinder body 2, and the first support portion 601 and the second support portion 602 are respectively interference fit with the inner wall of the mounting hole 200. Exemplarily, the mounting hole 200 of the cylinder body 2 is cylindrical, and the sensor head 4 extends into the mounting hole 200 of the cylinder body 2, so that the first support portion 601 and the second support portion 602 located on the two sides of the sensor head 4 are both in contact with the inner wall of the mounting hole 200, thereby achieving the fixed installation of the sensor 1 on the cylinder body 2.

[0038] In addition, since the first support portion 601 and the second support portion 602 are symmetrical about the sensor head 4, the stability of the sensor 1 installed on the cylinder body 2 is guaranteed, and uneven force on both sides of the inner wall of the mounting hole 200 caused by the asymmetry of the first support portion 601 and the second support portion 602 is avoided, resulting in the sensor head 4 shaking in the mounting hole 200 due to the vibration of the engine, affecting the detection function of the sensor 1.

[0039] In some possible implementations, the first support portion 601 and the second support portion 602 both include an arc portion 603. The arc portion 603 is arranged in a first direction ( Figure 1 The highest point A of the arc on the first support portion 601 (shown in the X direction) abuts against the inner wall of the mounting hole 200. The first direction is the relative direction of the first support portion 601 and the second support portion 602, and is also the width direction of the sensor head 4.

[0040] For example, Figure 1As shown, the arc portion 603 of the first support portion 601 and the second support portion 602 both include an upper arc segment 604 and a lower arc segment 605, the highest point A of the arc is the intersection point of the upper arc segment 604 and the lower arc segment 605, and the upper arc segment 604 and the lower arc segment 605 are symmetrical about the highest point A of the arc.

[0041] The arrangement of the arc portion 603 of the first support portion 601 and the second support portion 602 is conducive to installation guidance. Specifically, since the arc radius of the lower arc segment 605 gradually decreases from the top (i.e., the highest point A of the arc) to the bottom, when the sensor head 4 is pressed into the mounting hole 200 of the cylinder body 2, the lower arc segment 605 first easily enters the mounting hole 200 until the highest point A of the arc abuts against the inner wall of the mounting hole 200 and cannot continue to move downward, the installation of the sensor 1 and the cylinder body 2 is completed.

[0042] Since the arc radius of the upper arc segment 604 gradually increases from top to bottom until it reaches the maximum at the highest point A of the arc, when the sensor head 4 is removed from the mounting hole 200 of the cylinder body 2, it is easy to overcome the abutment force between the highest point A of the arc and the inner wall of the mounting hole 200, and the upper arc segment 604 can easily slide out of the mounting hole 200, completing the removal of the sensor 1 from the cylinder body 2.

[0043] On the other hand, the arc design of the first support portion 601 and the second support portion 602 reduces the contact area between the support portion 6 of the sensor 1 and the mounting hole 200 while ensuring reliable connection between the sensor 1 and the cylinder body 2, thereby facilitating the installation and removal of the sensor 1 and the cylinder body 2.

[0044] In some possible implementations, a hollow area 7 is formed between the first support portion 601 and the sensor head 4, and between the second support portion 602 and the sensor head 4. Exemplarily, the first support portion 601 and the second support portion 602 are connected to the sensor head 4 through their upper and lower ends, and the middle portion between the upper and lower ends is not connected to the sensor head 4, so a hollow area 7 is formed between the sensor head 4 and the first support portion 601, and between the sensor head 4 and the second support portion 602.

[0045] The provision of the hollow area 7 saves materials on the one hand, and ensures the elastic performance of the support part 6 (including the first support part 601 and the second support part 602) on the other hand, making it easy to apply force to the support part 6, thereby facilitating the sensor head 4 to be pressed into the mounting hole 200 of the cylinder body 2.

[0046] In some possible implementations, the first support portion 601 and the second support portion 602 both include a Figure 1Exemplarily, multiple first support parts 601 and second support parts 602 are provided, and the multiple first support parts 601 and second support parts 602 are all in contact with the inner wall of the mounting hole 200, so that the cylinder body 2 and the sensor 1 have multiple connection points, thereby ensuring the stability of the sensor 1 installed on the cylinder body 2.

[0047] In this embodiment, the first support part 601 and the second support part 602 each include two, and the two first support parts 601 and the two second support parts 602 have the same structure and size. However, those skilled in the art can understand that in other embodiments, only one first support part 601 and one second support part 602, or three first support parts 601 and three second support parts 602 can be provided, and the structures and sizes of the three first support parts 601 can be the same or different, and the structures and sizes of the three second support parts 602 can be the same or different, and the present application does not impose any restrictions on this, as long as the multiple first support parts 601 and the multiple second support parts 602 are left-right symmetrical about the sensor head 4, thereby ensuring the reliable connection between the sensor 1 and the cylinder body 2.

[0048] refer to Figure 1 , Figure 3 and Figure 4 In some possible implementations, the first support portion 601 and the second support portion 602 are located in the width direction of the sensor head 4 ( Figure 1 The projections on the first support portion 601 and the second support portion 602 are both S-shaped. Exemplarily, the first support portion 601 and the second support portion 602 are both curved plate-like structures, which include a plate inner wall 607 and a plate outer wall 608, that is, along the width direction of the sensor head 4, the surfaces of the first support portion 601 and the second support portion 602 facing the sensor head 4 are the plate inner wall 607, and the surfaces facing away from the sensor head 4 are the plate outer wall 608.

[0049] Among them, Figure 4 As shown, the inner wall 607 of the plate is in the thickness direction of the sensor head 4 ( Figure 1 The arc radius R1 of the projection on the sensor head 4 (as shown in the Y direction) is 20mm to 30mm, and the fillet radius R2 of the projection of the fillet at the connection between the inner wall 607 of the plate and the sensor head 4 in the thickness direction of the sensor head 4 is 0.1mm to 1mm; the arc radius R3 of the projection of the outer wall 608 of the plate in the thickness direction of the sensor head 4 is 20mm to 30mm, and the fillet radius R4 of the projection of the fillet at the connection between the outer wall 608 of the plate and the sensor head 4 in the thickness direction of the sensor head 4 is 0.1mm to 1mm.

[0050] like Figure 3 As shown, the outer wall 608 of the plate is in the width direction of the sensor head 4 ( Figure 1The projection on the sensor head 4 (shown in the X direction) includes four arc segments, namely a first arc segment 611, a second arc segment 612, a third arc segment 613 and a fourth arc segment 614, wherein the first arc segment 611 and the third arc segment 613 are along the thickness direction ( Figure 3 The second arc segment 612 and the fourth arc segment 614 are arranged at intervals along the thickness direction of the sensor head 4, and the second arc segment 612 and the fourth arc segment 614 are parallel.

[0051] The arc radius R5 of the first arc segment 611 is 27 mm to 29 mm, the arc radius R6 of the third arc segment 613 is 30 mm to 33 mm, the arc radius R7 of the second arc segment 612 is 20 mm to 30 mm, and the arc radius R8 of the fourth arc segment 614 is 20 mm to 30 mm. The spacing between the first arc segment 611 and the third arc segment 613 and the spacing between the second arc segment 612 and the fourth arc segment 614 are both the width H of the first support portion 601 and the second support portion 602.

[0052] Preferably, in this embodiment, the arc radius R1 of the projection of the inner wall 607 of the plate in the thickness direction of the sensor head 4 is 25 mm, and the fillet radius R2 of the projection of the fillet at the connection between the inner wall 607 and the sensor head 4 in the thickness direction of the sensor head 4 is 0.5 mm; the arc radius R3 of the projection of the outer wall 608 of the plate in the thickness direction of the sensor head 4 is 27 mm, and the fillet radius R4 of the projection of the fillet at the connection between the outer wall 608 and the sensor head 4 in the thickness direction of the sensor head 4 is 0.3 mm. Then, the thickness of the first support portion 601 and the second support portion 602 (that is, the distance between the inner wall 607 and the outer wall 608) is 2 mm.

[0053] The arc radius R5 of the first arc segment 611 is 28.6 mm, the arc radius R6 of the third arc segment 613 is 31.5 mm, the arc radius R7 of the second arc segment 612 is 29.9 mm, and the arc radius R8 of the fourth arc segment 614 is 27 mm. Then, the width H of the first support portion 601 and the second support portion 602 (that is, the distance between the first arc segment 611 and the third arc segment 613 and the distance between the second arc segment 612 and the fourth arc segment 614) is 2.9 mm.

[0054] The above describes in detail the specific structure and size of the first support portion 601 and the second support portion 602 in the present embodiment, but those skilled in the art will appreciate that in other embodiments, the first support portion 601 and the second support portion 602 may also be of other shapes and sizes, as long as they can abut against the inner wall of the mounting hole 200 of the cylinder body 2 to fix the sensor 1 on the cylinder body 2.

[0055] The present application also discloses an engine electronic control system, comprising: a cylinder body 2 and the above-mentioned sensor 1, wherein the cylinder body 2 is provided with a mounting hole 200, and the first supporting portion 601 and the second supporting portion 602 of the sensor 1 are respectively interference-fitted with the inner wall of the mounting hole 200.

[0056] The application also discloses a car, comprising the above-mentioned engine electronic control system.

[0057] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A sensor for mounting on a cylinder, the cylinder comprising a mounting hole, characterized in that: The sensor comprises: A sensor head, used to extend into the mounting hole of the cylinder body; A support portion, formed integrally with the sensor head; The support portion includes a first support portion and a second support portion, wherein the first support portion and the second support portion are respectively located on the side surfaces of the sensor head; The first supporting portion and the second supporting portion can respectively be interference fit with the inner wall of the mounting hole.

2. The sensor according to claim 1, characterized in that The first supporting portion and the second supporting portion are respectively located on two side surfaces of the sensor head and are symmetrically arranged with respect to the sensor head.

3. The sensor according to claim 2, characterized in that The first supporting portion and the second supporting portion both include an arc portion, and the highest points of the arc portions of the first supporting portion and the second supporting portion in a first direction are in contact with the inner wall of the mounting hole, and the first direction is the relative direction of the first supporting portion and the second supporting portion.

4. The sensor according to claim 3, characterized in that The supporting portion includes a plurality of the first supporting portions and a plurality of the second supporting portions. The plurality of the first supporting portions are arranged at intervals along a length direction of the sensor, and the plurality of the second supporting portions are arranged at intervals along the length direction of the sensor.

5. The sensor according to claim 3, characterized in that A hollow area is formed between the support portion and the sensor head.

6. The sensor according to claim 3, characterized in that The projection of the support portion in the first direction is in an S-like shape.

7. The sensor according to claim 3, characterized in that The width of the support portion is 2 mm to 4 mm.

8. The sensor according to claim 3, characterized in that The thickness of the support portion is 1 mm to 3 mm.

9. An engine electronic control system, characterized in that: include: A cylinder body having a mounting hole; and The sensor according to any one of claims 1 to 8, wherein the first supporting portion and the second supporting portion of the sensor are respectively interference fit with the inner wall of the mounting hole.

10. An automobile, characterized in that: Includes the engine electronic control system as described in claim 9.

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