Engine exhaust unit of straddle type vehicle

Abstract

The utility model provides an engine exhaust unit of a straddle type vehicle. The engine exhaust unit of the straddle type vehicle comprises an engine, an exhaust pipe, a silencer and a first oxygen sensor. One end of the exhaust pipe is connected with the engine. And the other end of the exhaust pipe is connected with the silencer. The first oxygen sensor is arranged on the silencer. The silencer comprises a silencer inner side and a silencer outer side, the silencer inner side is opposite to the silencer outer side, the silencer inner side faces a rear wheel of the straddle type vehicle, and the first oxygen sensor is arranged on the silencer inner side.

Description

Technical Field

[0001] The utility model relates to an engine exhaust unit, in particular to an engine exhaust unit of a straddle-type vehicle. Background Art

[0002] The oxygen sensor is a key component in existing straddle-type vehicles. Its primary function is to monitor the oxygen concentration in the exhaust system, enabling the engine control unit (ECU) to adjust the fuel-air mixture for optimal combustion efficiency and reduced emissions. Existing oxygen sensors are typically installed in the exhaust line, close to the exhaust manifold, to monitor the oxygen concentration in the exhaust gases. However, with increasingly stringent exhaust emission regulations, existing oxygen sensor installation methods no longer meet these requirements. Utility Model Content

[0003] The present invention provides an engine exhaust unit for a straddle-type vehicle, intended to address the problems of the prior art. The unit comprises an engine, an exhaust pipe, a muffler, and a first oxygen sensor. One end of the exhaust pipe is connected to the engine. The other end of the exhaust pipe is connected to the muffler. The first oxygen sensor is disposed on the muffler. The muffler includes an inner muffler portion and an outer muffler portion, the inner muffler portion being opposite the outer muffler portion and facing a rear wheel of the straddle-type vehicle. The first oxygen sensor is disposed on the inner muffler portion.

[0004] In one embodiment, the engine exhaust unit further includes a heat protection cover, wherein the heat protection cover is disposed outside the muffler.

[0005] In one embodiment, at least a portion of the first oxygen sensor is embedded in the muffler, and at least a portion of the first oxygen sensor is exposed outside the muffler.

[0006] In one embodiment, a windward concave portion is formed on the inner side of the muffler, and the first oxygen sensor is disposed in the windward concave portion.

[0007] In one embodiment, the windward recess includes an air inlet notch and an air guide wall, at least part of the air inlet notch is formed in the front section of the windward recess, and at least part of the air guide wall is formed in the rear section of the windward recess.

[0008] In one embodiment, the first oxygen sensor includes a rubber sleeve, and the rubber sleeve is exposed outside the muffler.

[0009] In one embodiment, the engine exhaust unit further includes a cable connected to the first oxygen sensor.

[0010] In one embodiment, on a front projection surface, the rubber sleeve is located within a projection range of the windward recessed portion.

[0011] In one embodiment, the engine exhaust unit further includes a second oxygen sensor, wherein the second oxygen sensor is disposed at the front section of the exhaust pipe.

[0012] In one embodiment, the engine exhaust unit further includes a catalytic converter, wherein the catalytic converter is disposed in the muffler.

[0013] In an embodiment of the present invention, a first oxygen sensor is located on the muffler to meet exhaust emission regulations. Specifically, the first oxygen sensor is located inside the muffler to protect it from theft or accidental collisions. In one embodiment, a windward recess is formed on the inside of the muffler, and the first oxygen sensor is located within the windward recess. This reduces heat accumulation and prevents damage to the oxygen sensor due to the high heat from the muffler. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the appearance of a motorcycle according to an embodiment of the present invention.

[0015] Figure 2 This is a perspective view of the main structure of the engine exhaust unit according to an embodiment of the present invention.

[0016] Figure 3 This is a front view of the main structure of the engine exhaust unit according to an embodiment of the present invention.

[0017] Figure 4 This is the relative relationship between the engine exhaust unit and the rear wheel in an embodiment of the present invention.

[0018] Figure 5 This is the detailed structure of the first oxygen sensor according to an embodiment of the present invention.

[0019] Figure 6 This is the detailed structure of the muffler according to an embodiment of the present invention.

[0020] Description of main component symbols:

[0021] 1: First oxygen sensor

[0022] 11: Rubber kit

[0023] 3: Exhaust pipe

[0024] 4:Silencer

[0025] 401:Inside of the muffler

[0026] 402: muffler outer side

[0027] 41: Windward depression

[0028] 411: Air inlet gap

[0029] 412: Wind guide wall

[0030] 5: Heat protection cover

[0031] 6: Cable

[0032] 7: Second oxygen sensor

[0033] M: Motorcycle

[0034] 91: Dragon Head

[0035] 92:Front wheel

[0036] 93: Rear wheel

[0037] 94: Seat cushion

[0038] 95: Powertrain DETAILED DESCRIPTION

[0039] Reference Figure 1 , which is the appearance of a motorcycle M according to an embodiment of the present invention, including components such as a handlebar 91, a front wheel 92, a rear wheel 93, a seat 94, and a power system 95.

[0040] The motorcycle M comprises a front section, a middle section, and a rear section. The front section of the motorcycle M is equipped with components such as a handlebar 91, a front wheel 92, turn signals, and a keyhole. The middle section of the motorcycle M is equipped with components such as a powertrain 95, a seat 94, and a kickstand. The rear section of the motorcycle M is equipped with components such as a taillight, a rear wheel 93, and a fender.

[0041] The handlebar 91 controls the direction of travel of the motorcycle M. Functional components, including instruments, switches, and rearview mirrors, may be mounted on the handlebar 91. The handlebar 91 also features handles (including a gas grip) and a parking brake. The user can use the handlebars to steer the handlebar 91, adjust the throttle angle of the power system 95 to control power output, and decelerate the motorcycle M using the parking brake. The handlebar 91 may also be equipped with a main light, which provides primary illumination for the motorcycle M.

[0042] The handlebar 91 and the front wheel 92 are linked via a handlebar rotation axis, whereby the angle of the front wheel 92 can be controlled by rotating the handlebar 91, thereby controlling the direction of travel of the motorcycle M.

[0043] The power system 95 is connected to and drives the rear wheel 93 , thereby providing power to the motorcycle M and causing the motorcycle M to move forward.

[0044] Figure 2This is a perspective view of the main structure of the engine exhaust unit of the embodiment of the utility model. Figure 2 The engine exhaust unit of the present invention includes an engine (not shown), an exhaust pipe 3, a muffler 4, and a first oxygen sensor 1. One end of the exhaust pipe 3 is connected to the engine (not shown). The other end of the exhaust pipe 3 is connected to the muffler 4. The first oxygen sensor 1 is located above the muffler 4.

[0045] Figure 3 This is a front view of the main structure of the engine exhaust unit according to an embodiment of the present invention. Figure 4 The relative relationship between the engine exhaust unit and the rear wheel of the embodiment of the present invention. Figure 3 、 Figure 4 In one embodiment, the muffler includes a muffler inner side 401 and a muffler outer side 402 , the muffler inner side 401 is opposite to the muffler outer side 402 , the muffler inner side 401 faces the rear wheel 93 of the straddle-type vehicle (motorcycle), and the first oxygen sensor 1 is disposed on the muffler inner side 401 .

[0046] Reference Figure 3 In one embodiment, the engine exhaust unit further comprises a heat protection cover 5, wherein the heat protection cover 5 is provided on the outer side 402 of the muffler. The heat protection cover 5 can prevent the user from being burned by accidentally touching the outer side 402 of the muffler.

[0047] Reference Figure 3 In one embodiment, at least a portion of the first oxygen sensor 1 is embedded in the muffler 4 , and at least a portion of the first oxygen sensor 1 is exposed outside the muffler 4 .

[0048] Figure 5 This is the detailed structure of the first oxygen sensor of the present invention. Figure 3 、 Figure 5 In one embodiment, the first oxygen sensor 1 includes a rubber sleeve 11. The rubber sleeve 11 is not suitable for withstanding high temperatures. Therefore, in one embodiment, the rubber sleeve 11 is exposed outside the muffler 4. The above disclosure does not limit the present invention. For example, in another embodiment, other parts of the first oxygen sensor 1 may also be exposed outside the muffler 4.

[0049] Figure 6 This is the detailed structure of the silencer of the embodiment of the utility model. Figure 2 、 Figure 6 In one embodiment, a windward recessed portion 41 is formed on the inner side 401 of the muffler, and the first oxygen sensor 1 is disposed in the windward recessed portion 41 .

[0050] Matching reference Figure 2 、 Figure 6 In one embodiment, the windward recessed portion 41 includes an air inlet notch 411 and an air guide wall 412. At least a portion of the air inlet notch 411 is formed at the front end of the windward recessed portion 41, and at least a portion of the air guide wall 412 is formed at the rear end of the windward recessed portion 41. When the vehicle is moving, the impact airflow passes through the air inlet notch 411 and blows against the first oxygen sensor 1 and the air guide wall 412, thereby removing heat from the first oxygen sensor 1 and the windward recessed portion 41, preventing heat accumulation.

[0051] Reference Figure 5 In one embodiment, the engine exhaust unit further comprises a cable 6 connected to the first oxygen sensor 1. The cable 6 is used to transmit the oxygen information detected by the first oxygen sensor 1.

[0052] Reference Figure 3 In one embodiment, on a front projection surface, the rubber sleeve 11 is located within the projection range of the windward recessed portion 41. The above disclosure does not limit the present invention.

[0053] Reference Figure 2 In one embodiment, the engine exhaust unit further includes a second oxygen sensor 7, which is disposed at the front section of the exhaust pipe 3. However, the above disclosure does not limit the present invention. In another embodiment, the second oxygen sensor 7 may also be disposed on the engine (not shown).

[0054] In one embodiment, the engine exhaust unit further includes a catalytic converter (not shown), which is disposed in the muffler.

[0055] In an embodiment of the present invention, a first oxygen sensor is located on the muffler to meet exhaust emission regulations. Specifically, the first oxygen sensor is located inside the muffler to protect it from theft or accidental collisions. In one embodiment, a windward recess is formed on the inside of the muffler, and the first oxygen sensor is located within the windward recess. This reduces heat accumulation and prevents damage to the oxygen sensor due to the high heat from the muffler.

[0056] In the embodiment of the present invention, the motorcycle defined in the present invention may include a fuel motorcycle, an electric motorcycle or other motor vehicles.

[0057] Although the present invention has been disclosed above with specific preferred embodiments, they are not intended to limit the present invention. Those skilled in the art may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of protection claimed in the patent application documents.

Claims

1. An engine exhaust unit for a straddle-type vehicle, characterized in that: include: One engine; an exhaust pipe, wherein one end of the exhaust pipe is connected to the engine; a muffler, wherein the other end of the exhaust pipe is connected to the muffler; and a first oxygen sensor, mounted on the muffler; The muffler includes an inner side and an outer side of the muffler. The inner side of the muffler is opposite to the outer side of the muffler and faces a rear wheel of the straddle-type vehicle. The first oxygen sensor is arranged on the inner side of the muffler.

2. The engine exhaust unit for a straddle-type vehicle according to claim 1, wherein: The utility model further comprises a heat protection cover, wherein the heat protection cover is arranged on the outside of the muffler.

3. The engine exhaust unit for a straddle-type vehicle according to claim 1, wherein: At least a portion of the first oxygen sensor is embedded in the muffler, and at least a portion of the first oxygen sensor is exposed outside the muffler.

4. The engine exhaust unit for a straddle-type vehicle according to claim 3, wherein: A windward concave portion is formed on the inner side of the muffler, and the first oxygen sensor is arranged in the windward concave portion.

5. The engine exhaust unit for a straddle-type vehicle according to claim 4, wherein: The windward recessed portion includes an air inlet notch and an air guide wall. At least part of the air inlet notch is formed at the front section of the windward recessed portion, and at least part of the air guide wall is formed at the rear section of the windward recessed portion.

6. The engine exhaust unit for a straddle-type vehicle according to claim 5, wherein: The first oxygen sensor includes a rubber sleeve exposed outside the muffler.

7. The engine exhaust unit for a straddle-type vehicle according to claim 6, wherein: Also included is a cable connected to the first oxygen sensor.

8. The engine exhaust unit for a straddle-type vehicle according to claim 6, wherein: On a front projection surface, the rubber sleeve is located within a projection range of the windward concave portion.

9. The engine exhaust unit for a straddle-type vehicle according to claim 5, wherein: The device further comprises a second oxygen sensor, wherein the second oxygen sensor is arranged at the front section of the exhaust pipe.

10. The engine exhaust unit for a straddle-type vehicle according to claim 5, wherein: The utility model further comprises a catalytic converter, wherein the catalytic converter is arranged in the muffler.

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