TWM608323U - Disposal structure of sewage treatment unit for motorcycle exhaust device - Google Patents

Abstract

The configuration structure of the sewage treatment unit of the locomotive exhaust device of this invention is set on a locomotive. The locomotive includes an engine with a cylinder head, a cylinder and a crankcase, an exhaust duct, a sewage treatment unit, and a Muffler, the two ends of the exhaust duct are respectively connected to the exhaust port of the engine and the inlet of the muffler. The sewage treatment unit is located between the exhaust port of the engine and the inlet of the muffler, and is connected to the exhaust duct. The sewage treatment The unit includes a sewage treatment unit body, at least one oxygen sensor arranged on the sewage treatment unit body, and a catalytic converter housed in the sewage treatment unit body. Wherein, viewed from the front of the locomotive, the sewage treatment unit is located between the center line of the engine and the center line of the muffler. Thereby, it is possible to avoid the trouble of arranging the catalytic converter in the muffler, causing the muffler to be difficult to manufacture and occupying the internal volume of the muffler.

Description

Disposal structure of sewage treatment unit for locomotive exhaust device

This creation is about an arrangement structure of a sewage treatment unit of an exhaust device, especially a sewage treatment unit arrangement structure of a locomotive exhaust device suitable for locomotives.

Today’s commonly used personal transportation vehicles generally include automobiles and locomotives. The locomotive type of transportation is a two-wheeled, three-wheeled or four-wheeled vehicle that generates power from an engine and mainly uses the handle to control the direction. It is simple to operate, convenient to move, and cost-effective. The feature of low cost has become the most commonly used means of transportation.

The main purpose of the oxygen sensor (Oxygen Sensor or O2 Sensor) installed in the exhaust system of locomotive engines is to monitor the "air-fuel ratio" of gasoline and oxygen in the engine. The information of the oxygen content in the exhaust gas detected in the tube is sent back to the engine control unit (ECU: Engine Control Unit) of the locomotive. Too much oxygen means that the air-fuel ratio is too lean, and too little oxygen means that the air-fuel ratio is too rich. If it is too lean, the engine control unit will drive the injector to inject more fuel to enrich the gas. If the air-fuel ratio is too rich, the engine control unit will control the injector and make it inject less fuel, so that the engine control unit will quickly Under the control of the operation, the most appropriate air-fuel ratio can be adjusted quickly, so that every drop of oil can play the best efficiency and achieve fuel-saving effect. Therefore, the oxygen sensor can be used to determine whether the exhaust gas in the exhaust pipe is too rich or too lean.

For locomotives currently on the market, there must be an upstream oxygen sensor inside the fuel injection engine, which is installed upstream of the catalytic converter to detect the exhaust oxygen content and feed it back to the engine control unit (ECU) and engine control unit. (ECU) The air-fuel ratio of the engine is controlled by controlling the amount of fuel injected by the injector to maintain the most suitable mixing ratio in each operating state. However, as pollution regulations become more and more stringent, the traditional upstream oxygen sensor cannot monitor the degradation of the catalytic converter, so a downstream oxygen sensor must be added behind the catalytic converter to detect the degradation of the catalytic converter. . However, in a limited space, it is necessary to install upstream oxygen sensors, catalytic converters, and downstream oxygen sensors in the muffler, which will occupy the internal volume of the muffler and is not easy to manufacture.

This is the reason for the creation. Based on the spirit of active invention and creation, I was eager to think of a "discharge treatment unit configuration structure of locomotive exhaust device" that could solve the above problems. After several research experiments, I finally completed this creation.

In order to improve the above-mentioned problems, the exhaust pipe in front of the muffler is connected to a sewage treatment unit, and components such as a catalytic converter and an oxygen sensor are installed in the sewage treatment unit to avoid the installation of the catalytic converter in the muffler. In the muffler, it is difficult to manufacture the muffler and the internal volume of the muffler is occupied.

In order to achieve the above-mentioned purpose, the discharging treatment unit configuration structure of the locomotive exhaust device of this invention is arranged on a locomotive. The locomotive includes an engine, an exhaust duct, a sewage treatment unit, and a muffler. The engine has A cylinder head, a cylinder, and a crankcase. The two ends of the exhaust duct are respectively connected to the exhaust port of the engine and the inlet of the muffler. The sewage treatment unit is located between the exhaust port of the engine and the inlet of the muffler. And connected to the exhaust duct, the sewage treatment unit includes a sewage treatment unit body, at least one oxygen sensor arranged on the sewage treatment unit body, and a catalytic converter housed in the sewage treatment unit body, wherein: Viewed from the front of the locomotive, the sewage treatment unit is located between the center line of the engine and the center line of the muffler.

As seen from the right side of the locomotive, at least a part of the sewage treatment unit configuration structure described above is located in front of the connecting surface of the crankcase and the cylinder, and behind the connecting surface of the cylinder and the cylinder head of the engine.

The center line of the catalytic converter of the above-mentioned sewage treatment unit is almost perpendicular to the center line of the cylinder of the engine.

The aforementioned at least one oxygen sensor refers to two oxygen sensors, the two oxygen sensors are respectively located upstream and downstream of the catalytic converter, and the two oxygen sensors are respectively referred to as the upstream oxygen sensor and the downstream oxygen sensor sensor.

The aforementioned at least one oxygen sensor refers to an oxygen sensor, which is located downstream of the catalytic converter, and is also called a downstream oxygen sensor.

The body of the sewage treatment unit has an air inlet pipe and an air outlet pipe, and the center line of the air inlet pipe is almost perpendicular to the center line of the air outlet pipe.

The above summary and the following detailed description are all exemplary in order to further illustrate the scope of patent application of the present invention. The other objectives and advantages of the present invention will be explained in the following descriptions and illustrations.

Please refer to Figures 1 and 2, which are respectively a side view and a front view of the emission treatment unit configuration structure of the locomotive exhaust device of the first preferred embodiment of the creation, and the emission treatment unit configuration structure of the locomotive exhaust device of this embodiment Is installed on a locomotive, the locomotive includes an engine 10, an exhaust duct 17, a sewage treatment unit 20, an upper bracket 191, a lower bracket 192, a rear wheel support frame 193, a muffler 18, and An upstream oxygen sensor 22.

The engine 10 has a cylinder head 12, a cylinder 13, and a crankcase 15. The two ends of the exhaust duct 17 are respectively connected to the exhaust port of the engine 10 and the inlet of the muffler 18. The muffler 18 is connected to the muffler through the upper bracket 191 The lower bracket 192 is connected to the rear wheel support frame 193, and the sewage treatment unit 20 is located between the exhaust port of the engine 10 and the inlet of the muffler 18, and is connected to the exhaust duct 17. The upstream oxygen sensor 22 is arranged on the exhaust duct 17, and the upstream oxygen sensor 22 is located upstream of the sewage treatment unit 20.

As shown in FIG. 2, viewed from the front of the locomotive, the sewage treatment unit 20 is located between the center line C1 of the engine 10 and the center line C2 of the muffler 18. In addition, as shown in FIG. 1, viewed from the right side of the locomotive, at least a part of the sewage treatment unit 20 is located in front of the cylinder joint surface P1 of the crankcase 15 and the engine 10, and on the joint surface of the cylinder 13 and the cylinder head 12 of the engine 10 After P2.

Please refer to FIG. 3 which is a schematic diagram of the configuration of the sewage treatment unit of the first preferred embodiment of this creation. Please also refer to FIG. 1. The sewage treatment unit 20 of this embodiment includes a sewage treatment unit body 21 and a sewage treatment unit body. The upstream and downstream oxygen sensors 23 on 21 and a catalytic converter 24 housed in the sewage treatment unit body 21 are located downstream of the catalytic converter 24.

In this embodiment, the center line C4 of the catalytic converter 24 of the sewage treatment unit 20 is almost perpendicular to the center line C3 of the cylinder 13 of the engine 10, and the sewage treatment unit body 21 has an air inlet pipe 211 and an air outlet pipe 212. The inlet pipe 211 and the outlet pipe 212 are both connected to the exhaust pipe 17. The inlet pipe 211 is located more upstream of the exhaust pipe 17 than the outlet pipe 212, and the center line C5 of the inlet pipe 211 and the center line of the outlet pipe 212 C6 is almost vertical.

Please refer to FIG. 4 which is a schematic diagram of the configuration of the sewage treatment unit of the second preferred embodiment of the present invention. Please also refer to FIG. 1. The structure of this embodiment is roughly the same as that of the first embodiment, and the difference lies only in this embodiment. The sewage treatment unit 201 includes an upstream oxygen sensor 22, a downstream oxygen sensor 23, and a catalytic converter 24. The first embodiment has only a downstream oxygen sensor 23 and a catalytic converter 24. That is, in this embodiment, the upstream oxygen sensor 22 originally installed on the exhaust duct 17 is replaced with the sewage treatment unit 201, and the rest of the structure is the same.

In this embodiment, the center line C4 of the catalytic converter 24 of the sewage treatment unit 201 is almost perpendicular to the center line C3 of the cylinder 13 of the engine 10, and the sewage treatment unit body 26 has an air inlet pipe 261 and an air outlet pipe 262. The inlet pipe 261 and the outlet pipe 262 are both connected to the exhaust pipe 17. The inlet pipe 261 is located more upstream of the exhaust pipe 17 than the outlet pipe 262, and the center line C5 of the inlet pipe 261 and the center line of the outlet pipe 262 C6 is almost vertical.

In the above two embodiments, the exhaust duct 17 in front of the muffler 18 is connected to a sewage treatment unit 20, 201, and the sewage treatment unit 20, 201 is provided with a catalytic converter 24 and an upstream oxygen sensor 22 or a catalytic converter 24 With components such as an upstream oxygen sensor 22 and a downstream oxygen sensor 23, it is possible to avoid disposing the catalytic converter 24 in the muffler 18, which makes it difficult to manufacture the muffler 18 and occupies the internal volume of the muffler 18.

The above-mentioned embodiments are merely examples for the convenience of description, and the scope of rights claimed in this creation should be subject to the scope of the patent application, rather than being limited to the above-mentioned embodiments.

10: Engine 12: Cylinder head 13: cylinder 15: crankcase 17: Exhaust duct 18: Silencer 191: Upper bracket 192: Lower bracket 193: Rear wheel support frame 20,201: sewage treatment unit 21, 26: Sewage treatment unit body 211,261: intake pipe 212,262: Exhaust pipe 22: Upstream oxygen sensor 23: Downstream oxygen sensor 24: Catalytic converter C1: Engine centerline C2: Center line of muffler C3: Cylinder center line C4: Center line of catalytic converter C5: Centerline of intake pipe C6: Center line of outlet pipe P1: Joint surface of crankcase and cylinder P2: Cylinder and cylinder head joint surface

Fig. 1 is a side view of the configuration structure of the sewage treatment unit of the locomotive exhaust device of the first preferred embodiment of the invention. Fig. 2 is a front view of the configuration structure of the sewage treatment unit of the locomotive exhaust device of the first preferred embodiment of the invention. Fig. 3 is a schematic diagram of the configuration of the sewage treatment unit of the first preferred embodiment of the present invention. Fig. 4 is a schematic diagram of the configuration of the sewage treatment unit of the second preferred embodiment of the present invention.

10: Engine

12: Cylinder head

13: cylinder

15: crankcase

17: Exhaust duct

18: Silencer

191: Upper bracket

192: Lower bracket

193: Rear wheel support frame

20: Sewage treatment unit

22: Upstream oxygen sensor

23: Downstream oxygen sensor

C2: Center line of muffler

C3: Cylinder center line

P1: Joint surface of crankcase and cylinder

P2: Cylinder and cylinder head joint surface

Claims (6)

A sewage treatment unit configuration structure of a locomotive exhaust device is set on a locomotive. The locomotive includes an engine, an exhaust duct, a sewage treatment unit, and a muffler. The engine has a cylinder head, a cylinder, And a crankcase, the two ends of the exhaust duct are respectively connected to the exhaust port of the engine and the inlet of the muffler, and the sewage treatment unit is located between the exhaust port of the engine and the inlet of the muffler, and is connected to the An exhaust duct, the sewage treatment unit includes a sewage treatment unit body, at least one oxygen sensor arranged on the sewage treatment unit body, and a catalytic converter housed in the sewage treatment unit body, characterized in that : Observed from the front of the locomotive, the sewage treatment unit is located between the center line of the engine and the center line of the muffler. The sewage treatment unit arrangement structure of the locomotive exhaust device according to claim 1, wherein, viewed from the right side of the locomotive, at least a part of the sewage treatment unit is located in front of the combination of the crankcase and the cylinder of the engine, and is in the front Behind the joint surface of the engine cylinder and cylinder head. The arrangement structure of the sewage treatment unit of the locomotive exhaust device according to claim 1, wherein the center line of the catalytic converter of the sewage treatment unit is almost perpendicular to the center line of the engine cylinder. The discharging treatment unit configuration structure of a locomotive exhaust device according to claim 1, wherein the at least one oxygen sensor refers to two oxygen sensors, which are respectively located upstream and downstream of the catalytic converter. The configuration structure of the sewage treatment unit of the locomotive exhaust device according to claim 1, wherein the at least one oxygen sensor refers to an oxygen sensor, which is located downstream of the catalytic converter. The sewage treatment unit configuration structure of the locomotive exhaust device according to claim 1, wherein the sewage treatment unit body has an air inlet pipe and an air outlet pipe, and the center line of the air inlet pipe is nearly perpendicular to the center line of the air outlet pipe.

Images