CN108571367B - Exhaust system and vehicle using same - Google Patents
Exhaust system and vehicle using same Download PDFInfo
- Publication number
- CN108571367B CN108571367B CN201710142297.9A CN201710142297A CN108571367B CN 108571367 B CN108571367 B CN 108571367B CN 201710142297 A CN201710142297 A CN 201710142297A CN 108571367 B CN108571367 B CN 108571367B
- Authority
- CN
- China
- Prior art keywords
- pipe section
- exhaust system
- pipe
- flexible
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The utility model relates to an exhaust system and a vehicle using the same, the exhaust system comprises an exhaust pipe, the exhaust pipe is provided with a front pipe section, a rear pipe section and a flexible pipe section positioned between the front pipe section and the rear pipe section, a flexible heat insulation sleeve is arranged outside the flexible pipe section, the front end and the rear end of the heat insulation sleeve are respectively connected with the front pipe section and the rear pipe section, a containing cavity for collecting escaping gas is formed between the heat insulation sleeve and the exhaust pipe, and the exhaust system further comprises an air guide pipe, one end of which is communicated with the containing cavity, and the air guide pipe is used for guiding the escaping gas to a safe position. When the air leakage phenomenon occurs in the exhaust system, the escaping air enters the accommodating cavity and is guided to a safe position by the air guide pipe, so that the exhaust system is far away from a flammable environment, and further, fire accidents caused by the air leakage are prevented.
Description
Technical Field
The present utility model relates to an exhaust system and a vehicle using the same.
Background
At present, ignition events of a passenger car frequently happen, wherein a part of accident occurrence reasons are mainly spontaneous combustion of the passenger car caused by failure of an exhaust system of the passenger car. If the exhaust system is used as a high-temperature heat source of the whole vehicle and cannot be effectively protected and isolated, once the exhaust system fails, air leakage of the exhaust system can become one of the important reasons for causing spontaneous combustion of the vehicle.
The exhaust system of the passenger car comprises an exhaust pipe, wherein the exhaust pipe is connected between an engine and an exhaust muffler, the exhaust pipe comprises a front pipe section used for being connected with a supercharger of the engine, a rear pipe section used for being connected with the muffler, and a corrugated pipe section positioned between the front pipe section and the rear pipe section, and the corrugated pipe section is also called as a flexible pipe section, so that the exhaust pipe is in a flexible structure to absorb vibration and impact transmitted from the engine and avoid damaging the exhaust pipe. In the running process of the passenger car, gas generated in the engine enters the muffler through the exhaust pipe, and is discharged from the tail pipe after being treated by the muffler. It is known that the temperature of the gas exiting the tailpipe is very high, and in fact, the temperature of the gas just entering the exhaust pipe from the engine without being treated by the muffler is much higher than the temperature of the gas exiting the tailpipe. For example, chinese patent publication No. CN203248239U discloses a bus exhaust system, in which a heat-insulating layer is disposed on the outer side of an exhaust pipe of the bus exhaust system, and the heat-insulating layer is disposed on the outer side of the exhaust pipe to protect the safety of the circuit and gas path components around the exhaust pipe, and to keep the gas in the exhaust pipe at an extremely high temperature value, so that the reaction of the gas in the muffler is facilitated. It follows that the temperature of the gas before entering the muffler is very high. Based on the characteristics of the flexible pipe section, the flexible pipe section is easy to fatigue fracture after being used for a period of time, is a part with weaker safety in the whole exhaust system, is contacted with surrounding flammable environment after gas with extremely high temperature escapes once the flexible pipe section is broken, can cause fire disaster in a short time, especially for long-distance passenger cars, and can not be found in time by personnel in the car once the exhaust pipe leaks, so that fire accident is easy to happen.
Disclosure of Invention
The utility model aims to provide an exhaust system which is used for solving the technical problem that the spontaneous combustion of a vehicle is easily caused by the escape of high-temperature gas after the crack of an exhaust pipe in the prior art. The utility model also aims to provide a vehicle using the exhaust system.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model provides an exhaust system, includes the blast pipe, and the blast pipe has preceding pipeline section, back pipeline section and is located the flexible pipeline section between preceding pipeline section and the back pipeline section, and the outside of flexible pipeline section is equipped with flexible insulating sleeve, and the front end and the preceding pipeline section of insulating sleeve are connected, and the back end is connected with the back pipeline section, forms between insulating sleeve and the blast pipe and is used for collecting the chamber that holds of escaping gas, and this exhaust system still includes one end with hold the chamber intercommunication be used for guiding the air duct of escaping gas to the safe position.
The flexible deformation of the heat insulation sleeve is larger than the vibration deformation of the flexible pipe section.
The gas guide tube is provided with a sensor for detecting the signal of the escaping gas and transmitting the detected signal of the escaping gas to the alarm system.
The sensor is a smoke sensor.
The air duct is provided with an inverted U-shaped section, one end of the inverted U-shaped section is connected with the heat insulation sleeve, and the sensor is arranged at the top of the inverted U-shaped section.
The utility model provides a vehicle, includes frame and exhaust system, this exhaust system includes the blast pipe, and the blast pipe has preceding pipeline section, back pipeline section and is located the flexible pipeline section between preceding pipeline section and the back pipeline section, and the outside of flexible pipeline section is equipped with flexible insulating boot, and the front end and the preceding pipeline section of insulating boot are connected, and the rear end is connected with the back pipeline section, forms between insulating boot and the blast pipe and is used for collecting the chamber that holds of escaping gas, this exhaust system still include one end with hold the chamber intercommunication be used for with the air duct that the escaping gas was led to the safe position.
The flexible deformation of the heat insulation sleeve is larger than the vibration deformation of the flexible pipe section.
The vehicle comprises an alarm system, wherein a sensor for detecting an escaping gas signal and transmitting the detected escaping gas signal to the alarm system is arranged on an air duct, and the alarm system sends out an alarm signal after receiving the escaping gas signal transmitted by the sensor.
The sensor is a smoke sensor.
The air duct is provided with an inverted U-shaped section, one end of the inverted U-shaped section is connected with the heat insulation sleeve, and the sensor is arranged at the top of the inverted U-shaped section.
The beneficial effects of the utility model are as follows: the utility model provides a flexible pipe section, wherein the flexible pipe section is arranged between a front pipe section and a rear pipe section, and a heat insulation sleeve is arranged at the outer side of the flexible pipe section. The heat insulation sleeve plays a role in protecting surrounding components of the exhaust system; when the gas leakage phenomenon occurs, the escaping gas enters the accommodating cavity and is guided to a safe position by the gas guide pipe, so that the gas guide pipe is far away from the flammable environment, and further, the fire accident is prevented.
As a further improvement of the utility model, the flexible deformation of the heat insulation sleeve is larger than the vibration deformation of the flexible pipe section, so that the heat insulation sleeve arranged outside the exhaust pipe does not obstruct the capacity of the flexible pipe section to absorb vibration and impact.
As a further improvement of the utility model, the air duct is provided with a sensor which can detect the signal of the escaping gas in the air duct and is connected with an alarm system of the vehicle. When the gas leakage phenomenon occurs, the sensor transmits the detected gas escape signal to the alarm system, and the alarm system sends out the alarm signal, so that the purpose of timely finding and processing is achieved.
As a further improvement of the utility model, the sensor is a smoke sensor, the gas in the exhaust pipe is not catalyzed by the silencer, the solubility of smoke in the gas is higher, and compared with other airflow sensors and temperature sensors, the detection error of the smoke sensor is smaller.
Drawings
FIG. 1 is a schematic view showing an exhaust system mounted on a vehicle frame in embodiment 1 of the present utility model;
fig. 2 is a left side view of fig. 1.
Detailed Description
Embodiments of the present utility model will be further described with reference to the accompanying drawings.
In a specific embodiment 1 of the vehicle of the present utility model, as shown in fig. 1 to 2, the vehicle provided in this embodiment is a passenger car, and includes a frame and an exhaust system mounted on the frame, in this embodiment, the exhaust system is mounted at a position below a floor frame 3 of the whole car. The exhaust system comprises an exhaust pipe 2, the exhaust pipe 2 is connected between the engine supercharger 1 and the muffler 9, the exhaust pipe 2 forms an exhaust pipeline from the engine to the muffler, and gas discharged from the engine supercharger 1 enters the muffler 9 through the exhaust pipe 2 and finally is discharged into the atmosphere through an exhaust tail pipe 10.
The exhaust pipe 2 has a front pipe section 21, a rear pipe section 23, and a flexible pipe section 22 connected between the front pipe section 21 and the rear pipe section 23, the front end of the front pipe section 21 is connected to the engine supercharger 1, and the end of the rear pipe section 23 is connected to the muffler 9 through the flange structure 4. The flexible tube section 22 is a corrugated tube section, and the flexible tube section 22 has a certain deformability and can be deformed in a telescopic manner, so that the front tube section and the rear tube section of the exhaust tube are flexibly connected together, and the purpose is to absorb shock and impact generated by the engine. The outside cover of flexible pipe section 22 is equipped with flexible insulating sheath 6, and the front and back both ends of insulating sheath 6 pass through preceding pipe section and back pipe section zonulae occludens of fastening clamp 5 and blast pipe respectively, under the extrusion effect of fastening clamp 5, realizes sealed cooperation between insulating sheath 6 and the blast pipe lateral wall, can not appear leaking gas phenomenon, makes and forms one between insulating sheath and the blast pipe and can collect the holding chamber of escaping gas, when flexible pipe section fatigue fracture appears, the escaping gas is collected in holding the chamber. One side of the exhaust pipe 2 is provided with an air duct 8, an air inlet of which is communicated with the accommodating cavity, the air duct 8 guides the escaping air in the accommodating cavity to a safe position, namely a position far away from a combustible object, namely a position outside a vehicle body or a position without the combustible object in a vehicle chassis, and the high-temperature air is far away from the combustible object, so that fire accidents caused by air leakage are avoided. In this embodiment, the communication position of the accommodating cavity and the air duct 8 is located right above the accommodating cavity, that is, at the highest position of the accommodating cavity, and the principle that the high-temperature gas moves upwards is utilized to promote the high-temperature gas to quickly enter the air duct 8 from the highest position. The exhaust pipe 8 is connected with the smoke sensor 7 for detecting the escaping gas signals, the passenger car further comprises an alarm system, an indicator lamp of the alarm system is arranged on an instrument desk of the passenger car, the smoke sensor 7 is connected with the alarm system, when escaping gas from the exhaust pipe passes through the gas guide pipe 8, the escaping gas can be detected by the smoke sensor 7, the smoke sensor 7 transmits the detected gas signals to the alarm system, the alarm system can send alarm signals, the indicator lamp on the instrument desk flashes, the driver is reminded of the fault of the exhaust system, and the effect of timely finding and processing is achieved. In this embodiment, the air duct 8 has an inverted U-shaped section 81, one end of the inverted U-shaped section 81 is connected with the heat insulation sleeve, the top of the inverted U-shaped section 81 is the highest position of the air duct, the smoke sensor 7 is arranged at the top of the inverted U-shaped section 81 and is located at the highest point of the air duct, and the escaping gas signal can be detected as early as possible.
In addition, the heat insulation sleeve is made of a silicon dioxide fiber material or a silica gel high-silica composite material, has the characteristics of high temperature resistance and strong airflow impact resistance, plays a role in heat insulation when being used as the outer side wall of the accommodating cavity, can protect surrounding parts of an exhaust system, and can prevent high-temperature gas from igniting surrounding combustible materials. Meanwhile, the silica fiber material or the silica gel high silica composite material is a flexible material, has the advantages of softness and good toughness, and ensures that the part of the heat insulation sleeve between the two fastening hoops has a certain flexible deformation allowance when the heat insulation sleeve 6 is fixed by the fastening hoops, and the flexible deformation of the heat insulation sleeve is larger than the maximum vibration deformation of the flexible pipe section 22, so that the heat insulation sleeve 6 can not hinder the functions of absorbing vibration and impact of the exhaust pipe.
In other embodiments, the vehicle may also be a truck, a sedan, a school bus, or a caravan. The two ends of the heat insulation sleeve can be tightly tied by utilizing steel wires, so that the heat insulation sleeve is connected with the exhaust pipe. The smoke sensor may also be replaced by an air flow sensor or a temperature sensor. The smoke sensor may be disposed at any position of the airway. The alarm system and the sensor may not be provided. The sleeve may also be corrugated.
In the embodiment of the exhaust system of the present utility model, the structure of the exhaust system is as described above, and is not described herein again for avoiding repetition.
Claims (10)
1. An exhaust system comprising an exhaust pipe having a front pipe section, a rear pipe section, and a flexible pipe section positioned between the front pipe section and the rear pipe section, characterized in that: the outside of flexible pipe section is equipped with flexible insulating sheath, and the front end and the preceding pipe section of insulating sheath are connected, and the rear end is connected with the back pipe section, forms between insulating sheath and the blast pipe and is used for collecting the chamber that holds of escaping gas, and this exhaust system still includes one end with hold the chamber intercommunication be used for guiding the air duct of escaping gas to safe position.
2. The exhaust system of claim 1, wherein: the flexible deformation of the heat insulation sleeve is larger than the vibration deformation of the flexible pipe section.
3. An exhaust system according to claim 1 or 2, characterized in that: the gas guide tube is provided with a sensor for detecting the signal of the escaping gas and transmitting the detected signal of the escaping gas to the alarm system.
4. An exhaust system according to claim 3, characterized in that: the sensor is a smoke sensor.
5. An exhaust system according to claim 3, characterized in that: the air duct is provided with an inverted U-shaped section, one end of the inverted U-shaped section is connected with the heat insulation sleeve, and the sensor is arranged at the top of the inverted U-shaped section.
6. A vehicle comprising a frame and an exhaust system comprising an exhaust pipe having a front pipe section, a rear pipe section, and a flexible pipe section positioned between the front pipe section and the rear pipe section, characterized in that: the outside of flexible pipe section is equipped with flexible insulating sheath, and the front end and the preceding pipe section of insulating sheath are connected, and the rear end is connected with the back pipe section, forms between insulating sheath and the blast pipe and is used for collecting the chamber that holds of escaping gas, and this exhaust system still includes one end with hold the chamber intercommunication be used for guiding the air duct of escaping gas to safe position.
7. The vehicle according to claim 6, characterized in that: the flexible deformation of the heat insulation sleeve is larger than the vibration deformation of the flexible pipe section.
8. The vehicle according to claim 6 or 7, characterized in that: the vehicle comprises an alarm system, wherein a sensor for detecting an escaping gas signal and transmitting the detected escaping gas signal to the alarm system is arranged on an air duct, and the alarm system sends out an alarm signal after receiving the escaping gas signal transmitted by the sensor.
9. The vehicle according to claim 8, characterized in that: the sensor is a smoke sensor.
10. The vehicle according to claim 8, characterized in that: the air duct is provided with an inverted U-shaped section, one end of the inverted U-shaped section is connected with the heat insulation sleeve, and the sensor is arranged at the top of the inverted U-shaped section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142297.9A CN108571367B (en) | 2017-03-10 | 2017-03-10 | Exhaust system and vehicle using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142297.9A CN108571367B (en) | 2017-03-10 | 2017-03-10 | Exhaust system and vehicle using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108571367A CN108571367A (en) | 2018-09-25 |
| CN108571367B true CN108571367B (en) | 2023-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710142297.9A Active CN108571367B (en) | 2017-03-10 | 2017-03-10 | Exhaust system and vehicle using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108571367B (en) |
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| Publication number | Publication date |
|---|---|
| CN108571367A (en) | 2018-09-25 |
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