Protective cover of vehicle exhaust device sensor

Abstract

The utility model relates to a protective cover for a sensor of a vehicle exhaust device, which is characterized in that a catalyst part is arranged on the exhaust device, and the exhaust device is provided with a mounting seat for mounting the sensor; a protective cover covers the outer side of the mounting seat and can surround the mounting seat and the sensor mounted on the mounting seat; the protective cover is provided with a positioning part in an extending manner towards the direction of the mounting seat; a certain distance is kept between the protective wall of the protective cover and the mounting seat as well as between the protective wall of the protective cover and the sensor; therefore, on one hand, the concentricity error of the central axis of the sensor mounted on the mounting seat and the central axis of the protective cover can be reduced; and on the other hand, external foreign matters can be prevented from being accumulated in the protective cover, so that the use effect of the sensor is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a protective cover of a vehicle exhaust device sensor, in particular to a protective cover of a vehicle exhaust device sensor capable of reducing the error of the concentricity between the central axis of the sensor installed on the mounting seat and the central axis of the protective cover. BACKGROUND

[0002] A vehicle with an internal combustion engine system is provided with an exhaust device for discharging exhaust gas after combustion; in the technical field of vehicle exhaust devices, the applicant has applied for a new case of TWM646547; the applicant improves the use efficiency of the vehicle exhaust device and further applies for a utility model. CONTENT OF UTILITY MODEL

[0003] PROBLEMS TO BE SOLVED BY THE UTILITY MODEL

[0004] The utility model mainly aims at providing a protective cover of a vehicle exhaust device sensor, which overcomes the defect that the sensor of the existing exhaust device is easily damaged by external foreign matters and cannot obtain better protection.

[0005] TECHNICAL MEANS FOR SOLVING THE PROBLEMS

[0006] Therefore, some technical means of the utility model are to provide a protective cover of a vehicle exhaust device sensor, the exhaust device is provided with a catalyst part, the exhaust device is provided with a mounting seat for installing a sensor; the mounting seat is covered with a protective cover, the protective cover can surround the mounting seat and the sensor installed on the mounting seat; the protective cover is provided with a positioning part extending towards the mounting seat, and the protective wall of the protective cover maintains a certain distance from the mounting seat and the sensor.

[0007] Therefore, some technical means of the utility model are to provide a protective cover of a vehicle exhaust device sensor, the protective cover is a through cylinder; the inner diameter of the protective cover is greater than the outer diameter of the mounting seat; the lower end of the protective cover has a connecting part.

[0008] Therefore, some technical means of the utility model are to provide a protective cover of a vehicle exhaust device sensor, the bottom end of the connecting part is in an arc shape.

[0009] Therefore, some technical means of the utility model are to provide a protective cover of a vehicle exhaust device sensor, the protective cover is cut into a plurality of rib plates, a part of the rib plate is bent towards the inside of the protective cover and is arranged in an equidistant distribution manner to form a positioning part.

[0010] Some technical means of the utility model, in order to provide a vehicle exhaust device sensor's protective cover, by the protective cover inside by overhead view, multiple the rib bending and with equidistant distribution mode set forms the positioning part after, the gap between each rib forms the first leakage part.

[0011] Some technical means of the utility model, in order to provide a vehicle exhaust device sensor's protective cover, by the protective cover outside by side view, multiple the rib bending and with equidistant distribution mode set forms the positioning part after, the gap between each rib forms the first leakage part.

[0012] Some technical means of the utility model, in order to provide a vehicle exhaust device sensor's protective cover, every the rib between the interval length is greater than the width of every the rib.

[0013] Some technical means of the utility model, in order to provide a vehicle exhaust device sensor's protective cover, the rib's two sides are equipped with the gap, and the top end height of the gap is higher than the top edge of the mounting seat.

[0014] Some technical means of the utility model, in order to provide a vehicle exhaust device sensor's protective cover, the exhaust device is covered with a heat insulation piece outside the muffling part, by the side view of the vehicle, the heat insulation piece can shield at least one part of the mounting seat and the sensor or both; by the overhead view of the vehicle, the sensor is arranged towards the center of the vehicle body.

[0015] Some technical means of the utility model, in order to provide a vehicle exhaust device sensor's protective cover, the second leakage part has multiple, by the side view of the vehicle, in height, the bottom end of the lowest one of multiple the second leakage part extending downwards along the protective wall of the protective cover is lower than or equal to the lowest bottom end of the lowest one of the connecting part extending downwards along the protective wall.

[0016]

Effects of the utility model

[0017] The utility model reaches the success effect by some technical means, which is: by this, on the one hand, the error of the concentricity of the central axis of the sensor installed on the mounting seat and the central axis of the protective cover can be reduced; on the other hand, foreign matters can be avoided from accumulating in the protective cover, so that the use effect of the sensor is ensured.

[0018] The utility model reaches the success effect by some technical means, which is: by this, the installation engineering of the protective cover can be facilitated.

[0019] The utility model reaches the success effect by some technical means, which is: by this, the installation engineering of the protective cover can be facilitated, and the positioning during installation and the stability effect after installation are ensured.

[0020] The utility model discloses a technical means can reach the success effect in by some, and this more promotes the linking stability and linking convenience of the protective cover and the mounting seat.

[0021] The utility model discloses a technical means can reach the success effect in by some, and this promotes the positioning effect when installing the protective cover.

[0022] The utility model discloses a technical means can reach the success effect in by some, and this can promote the foreign matter that falls into the protective cover to be discharged outside the protective cover fast, and the maintenance and repair of convenient sensor's engineering can be carried out simultaneously.

[0023] The utility model discloses a technical means can reach the success effect in by some, and this can avoid the sensor from being damaged by the external mud, thereby can ensure the use effect of the sensor.

[0024] The utility model discloses a technical means can reach the success effect in by some, and this promotes the rigid strength of the protective cover, thereby can avoid the deformation of the protective wall of the protective cover.

[0025] The utility model discloses a technical means can reach the success effect in by some, and this more can reduce the probability of the sensor from being damaged by the external foreign matter.

[0026] The utility model discloses a technical means can reach the success effect in by some, and this can promote the foreign matter and water in the protective cover to be discharged fast, thereby can avoid the rust of the connecting portion. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the side view of the vehicle that the utility model exhaust device is implemented.

[0028] Figure 2 It is the perspective drawing of the utility model exhaust device.

[0029] Figure 3 It is the protective cover, mounting seat and sensor installation sectional view of the utility model.

[0030] Figure 4 It is the protective cover, mounting seat and sensor installation plan view of the utility model.

[0031] LIST OF REFERENCE NUMERALS

[0032] 1: vehicle

[0033] 11: frame unit

[0034] 111: steering mechanism 112: front fork unit

[0035] 12: seat cushion

[0036] 13: power unit

[0037] 131: Cylinder portion 1311: Cylinder head

[0038] 132: Transmission portion

[0039] 14: Rear rocker arm

[0040] 15: Vehicle body cover unit

[0041] 2: Exhaust device

[0042] 2a: Exhaust upstream section 2b: Exhaust downstream section

[0043] 3: Exhaust front pipe portion

[0044] 3a: First exhaust front pipe portion

[0045] 3a1: Exhaust inlet

[0046] 3b: Second exhaust front pipe portion

[0047] 3b1: Exhaust inlet

[0048] 31: Converging pipe

[0049] 4: Catalyst portion

[0050] 41: Housing 42: Catalyst

[0051] 43: Connection pipe 44: Mounting seat

[0052] 5: Muffler portion

[0053] 6: Heat insulating member

[0054] 7: First sensor

[0055] 8: Second sensor

[0056] 81: Cap portion

[0057] 9: Protective cover

[0058] 91: Connection portion

[0059] 92: Rib 921: Groove

[0060] 93: Positioning portion 94: First leakage portion

[0061] 95: Second leakage portion

[0062] 9a: Protective wall

[0063] FW: Front wheel

[0064] RW: Rear wheel

[0065] X: Center axis X1: Center axis DETAILED DESCRIPTION

[0066] In order to make the structure of the utility model and the effects achieved more easily understood, the following will be described with reference to the drawings.

[0067] First, please refer to Figure 1 The protective cover of the vehicle exhaust device sensor of the utility model, the vehicle of the utility model is exemplified by a straddle-type motorcycle.

[0068] As Figure 1 shown, the vehicle 1 has at least a steering mechanism 111 supported by a frame unit 11, a seat cushion 12 for sitting arranged on the frame unit 11, a front fork unit 112 composed of shock absorbers supported by the frame unit 11, a front wheel FW pivotally arranged at the lower end of the front fork unit 112, a power unit 13 locked on the frame unit 11, a rear swing arm 14 pivotally arranged on the frame unit 11, and a rear wheel RW pivotally arranged on the rear swing arm 14; the power unit 13 has a cylinder portion 131 and a transmission portion 132; the cylinder portion 131 has cylinder heads 1311, and the cylinder heads 1311 are implemented in multiple; the vehicle 1 is covered with a body cover unit 15.

[0069] As Figure 1 , 2 shown, the cylinder portion 131 of the power unit 13 is connected with an exhaust device 2 for discharging exhaust gas after combustion of the cylinder portion 131; the exhaust device 2 has an exhaust front pipe portion 3, a catalyst portion 4 arranged behind the exhaust front pipe portion 3, and a silencer portion 5 arranged behind the catalyst portion 4; a heat insulation member 6 is arranged outside the silencer portion 5 for heat insulation.

[0070] As Figure 1 , 2 shown, the exhaust device 2 can be applied to a single-cylinder or multi-cylinder engine system; the exhaust device 2 of the utility model is exemplified by a double-cylinder used in a multi-cylinder engine system, but the application range of the exhaust device 2 of the utility model is not limited to this, and it is hereby declared in advance. The exhaust front pipe portion 3 of the exhaust device 2 has a first exhaust front pipe portion 3a and a second exhaust front pipe portion 3b; the front ends of the first exhaust front pipe portion 3a and the second exhaust front pipe portion 3b are respectively provided with exhaust inlets 3a1 and 3b1, and the rear ends of the first exhaust front pipe portion 3a and the second exhaust front pipe portion 3b are connected with a manifold 31, and the manifold 31 is connected with the catalyst portion 4 behind it.

[0071] As Figure 1 , 2As shown, the catalyst portion 4 has a housing 41, in which a catalyst device 42 is installed; the housing 41 is provided with a connecting pipe 43 towards the rear of the vehicle body, i.e. towards the muffler portion 5, which connects the muffler portion 5 towards the rear end of the vehicle body; the muffler portion 5 is provided with a heat insulation member 6 on the outer side cover, which extends towards the connecting pipe 43 of the catalyst portion 4, i.e. the heat insulation member 6 can shield all or part of the outer side of the connecting pipe 43.

[0072] As shown in the drawings, Figure 1 , 2 The exhaust device 2 is divided into an exhaust upstream section 2a and an exhaust downstream section 2b by the catalyst portion 4; the exhaust device 2 is provided with a first sensor 7 on the exhaust upstream section 2a, and a second sensor 8 on the exhaust downstream section 2b, which can sense at least one component in the exhaust gas before and after the catalyst portion 4, such as oxygen, nitrogen, helium, sulfur, carbon dioxide, etc.; in the implementation of the present application, since the exhaust front pipe portion 3 has the first exhaust front pipe portion 3a and the second exhaust front pipe portion 3b, the first exhaust front pipe portion 3a and the second exhaust front pipe portion 3b are both provided with the first sensor 7, and further, the first sensor 7 is installed near the exhaust inlet 3a1, 3b1 adjacent to the exhaust front pipe portion 3, i.e. the first sensor 7 is located between the exhaust inlet 3a1, 3b1 of the exhaust front pipe portion 3 and the catalyst portion 4; the second sensor 8 is installed on the connecting pipe 43 behind the catalyst portion 4, whereby the first sensor 7 can sense the exhaust information before the catalyst portion 4, and the second sensor 8 can sense the exhaust information after the catalyst device 42 in the catalyst portion 4 is converted, so as to determine whether the catalyst device 42 in the catalyst portion 4 has degradation phenomenon and the degree of degradation; it should be further mentioned that the second sensor 8 is installed on the connecting pipe 43 behind the catalyst portion 4, rather than on the muffler portion 5, so that the second sensor 8 can avoid being affected by back pressure backflow exhaust gas dilution to affect its sensing accuracy, and at the same time, the installation process of the second sensor 8 can be simplified.

[0073] As shown in the drawings, Figure 1 , 2, 3, 4, the connecting pipe 43 is provided with a mounting seat 44, which can be formed on the connecting pipe 43 in an integral manner or connected to the connecting pipe 43 in another manner; the second sensor 8 is arranged on the mounting seat 44, in order to avoid that the second sensor 8 arranged on the mounting seat 44 is damaged by foreign matters in the external environment, the utility model is provided with a protective cover 9 on the mounting seat 44; the protective cover 9 is implemented in the form of a through cylinder, the inner diameter of the protective cover 9 is greater than the outer diameter of the mounting seat 44, so that the protective cover 9 can surround the mounting seat 44 and the second sensor 8 arranged on the mounting seat 44; the lower end of the protective cover 9 is formed in an arc shape to form a connecting portion 91, the bottom end of the connecting portion 91 is arc-shaped, that is, the bottom end of the connecting portion 91 is concave-convex in an arc shape, further, the connecting portion 91 has a plurality of connecting portions 91, so that the connecting portion 91 and the arc-shaped pipe body of the connecting pipe 43 are closely fitted; at least one rib 92 is arranged above the connecting portion 91 of the protective cover 9 by cutting or punching, further, two interval grooves 921 are punched or cut on two sides of the rib 92, the height of the interval groove 921 is designed to be higher than the height of the mounting seat 44, three ribs 92 are cut in the implementation of the utility model, so that the protective cover 9 of the utility model has six interval grooves 921, further, the three ribs 92 are arranged in an equidistant interval distribution manner, more specifically, the interval between the three ribs 92 is greater than the width of each rib 92 and the total width of the three ribs 92, so that foreign matters falling into the protective cover 9 cannot accumulate in the protective cover 9, and the rigidity of the protective cover 9 is improved; the three ribs 92 of the protective cover 9 are provided with positioning portions 93 towards the mounting seat 44, the three ribs 92 are bent towards the inside of the mounting seat 44 in the implementation of the utility model, the end edge of the positioning portion 93 is at least partially in contact with or extremely close to or elastically engaged with the outer periphery of the mounting seat 44, that is, the inner diameter of the end edge of the positioning portion 93 is slightly smaller than, equal to or slightly greater than the outer periphery of the mounting seat 44, that is, the protective cover 9 and the mounting seat 44 have three positioning points for positioning, so that when the protective cover 9 is welded on the connecting pipe 43, it can be accurately positioned on the outside of the mounting seat 44 and cover the mounting seat 44, and the protective wall 9a of the protective cover 9 is kept at a certain distance from the mounting seat 44 by the positioning portion 93; from the top view of the protective cover 9, the space between the ribs 92 (i.e. the positioning portion 93) inside the protective cover 9 can form a first leakage portion 94;Further, when the second sensor 8 is installed on the mounting seat 44, the protective wall 9a of the protective cover 9 and the locking cap portion 81 of the second sensor 8 can be kept at a certain distance by the positioning portion 93, so that when the second sensor 8 is locked into the mounting seat 44 by the tool, the protective wall 9a of the protective cover 9 and the locking cap portion 81 of the second sensor 8 keep a certain distance, and the tool can easily enter the protective cover 9 to lock the second sensor 8 on the mounting seat 44 without being disturbed. When viewed from the side of the protective cover 9, the gap left after the rib 92 is bent inward to form the positioning portion 93 forms a second leakage portion 95. The second leakage portion 95 is between the connecting portions 91, that is, the second leakage portion 95 has three gap slots. When external mud or water enters the protective cover 9, it flows downward from the first leakage portion 94 to the second leakage portion 95, and then flows out through any gap slot of the second leakage portion 95, thereby avoiding the accumulation of external mud and water in the protective cover 9. In the implementation of the utility model, the lowest bottom end of the second leakage portion 95 is lower than or equal to the lowest bottom end of the lowest connecting portion 91 of the protective cover 9, that is, the lowest bottom end of the second leakage portion 95 extending downward along the protective wall 9a of the protective cover 9 is lower than or equal to the lowest bottom end of the lowest connecting portion 91 extending downward along the protective wall 9a.

[0074] As shown in Figure 1 , 2 , the exhaust inlet 3a1, 3b1 of the exhaust device 2 is connected to the cylinder head 1311 of the cylinder portion 131, so that the exhaust device 2 can discharge the exhaust gas after the cylinder portion 131 is ignited. Further, the exhaust gas after the operation of the power unit 13 is discharged from the exhaust port (not shown in the figure) of the cylinder head 1311, enters the exhaust device 2 through the exhaust inlet 3a1, 3b1, and at least one component in the exhaust gas is sensed by the first sensor 7 when the exhaust gas enters the exhaust front pipe portion 3. The exhaust gas flowing into the catalyst portion 4 is purified by the conversion action of the catalyst 42, and the purified exhaust gas is discharged into the atmosphere after being damped in the damping portion 5. The converted and purified exhaust gas in the connecting pipe 43 is sensed by the second sensor 8 to obtain the gas component information after the exhaust gas is purified and converted. The information sensed by the first sensor 7 and the second sensor 8 is transmitted to the driving control device (not shown in the figure) to determine whether the catalyst 42 is deteriorated.

[0075] As shown in Figure 1As shown, in the implementation of the utility model, the exhaust device 2 is exposed outside the vehicle body cover unit 15 of the vehicle 1 outside the sound attenuation part 5, and the second sensor 8 is arranged to be offset to the center of the vehicle body of the vehicle 1 when viewed from the top of the vehicle body of the vehicle 1, so that the second sensor 8 can be prevented from being damaged by external foreign matters or being damaged by being stepped on.

[0076] The utility model mainly provides, by the exhaust device 2 is equipped with catalyst part 4, the exhaust device 2 is equipped with the mounting seat 44 that can install the second sensor 8, the mounting seat 44 outside cover is equipped with the protective cover 9, the protective cover 9 can surround the mounting seat 44 and the second sensor 8 installed on the mounting seat 44, the protective cover 9 is extended with the positioning part 93 towards the mounting seat 44 direction, the protective wall 9a of the protective cover 9 and the mounting seat 44 and the second sensor 8 keep certain spacing, so that on one hand can reduce the error of the concentricity of the central axis X of the second sensor 8 installed on the mounting seat 44 and the central axis X1 of the protective cover 9, on the other hand can avoid that external foreign matters are accumulated in the protective cover 9, so as to ensure the use effect of the second sensor 8.

[0077] In summary, the utility model can improve the known defects and achieve the purpose by the above structure, and the utility model has indeed improved the existing effect, and obviously has novelty, practicality and creativity.

Claims

1. A protective cover for a vehicle exhaust sensor, the protective cover comprising: The exhaust device is provided with a catalyst part, and is provided with a mounting seat for mounting a sensor; a protective cover is arranged outside the mounting seat, and the protective cover surrounds the mounting seat and the sensor mounted on the mounting seat; the protective cover is provided with a positioning part extending towards the mounting seat, and the protective wall of the protective cover is kept at a certain distance from the mounting seat and the sensor.

2. The protective cover for a vehicle exhaust perceiver according to claim 1, wherein The protective cover is a through cylinder, the inner diameter of the protective cover is greater than the outer diameter of the mounting seat, and the lower end of the protective cover is provided with a connecting part.

3. The protective cover for a vehicle exhaust perceiver according to claim 2, wherein, The bottom end of the connecting part is in an arc shape.

4. The protective cover for a vehicle exhaust apparatus sensor according to claim 2, characterized by The protective cover is cut into a plurality of rib plates by cutting, a part of the rib plate is bent towards the inside of the protective cover and is arranged in an equidistant distribution manner to form a positioning part.

5. The protective cover for a vehicle exhaust perceiver of claim 4, wherein, From the inside of the protective cover, the gaps between the rib plates form first leakage parts after the rib plates are bent and arranged in an equidistant distribution manner to form the positioning parts.

6. The protective cover for a vehicle exhaust sensor according to claim 4, wherein From the outside of the protective cover, the remaining gap slots form second leakage parts after the rib plates are bent and arranged in an equidistant distribution manner to form the positioning parts, and the second leakage parts are between each connecting part.

7. The protective cover for a vehicle exhaust perceiver of claim 4, wherein, The length of the spacing between each rib plate is greater than the width of each rib plate.

8. The protective cover for a vehicle exhaust perceiver of claim 4, wherein, Both sides of the rib plate are provided with a gap, and the top end of the gap is higher than the top edge of the mounting seat.

9. The protective cover for a vehicle exhaust perceiver of claim 1, wherein, The exhaust device is provided with a heat insulation part outside the sound insulation part, and from the side view of the vehicle, the heat insulation part can shield at least part of one or both of the mounting seat and the sensor; from the top view of the vehicle, the sensor is arranged to be biased towards the center of the vehicle body.

10. The protective cover for a vehicle exhaust sensor according to claim 6, wherein The second leakage part has a plurality of parts, and from the side view of the vehicle, the bottom end of the lowest one of the plurality of second leakage parts extending downwards along the protective wall of the protective cover in height is lower than or equal to the lowest bottom end of the lowest one of the connecting parts extending downwards along the protective wall.

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