CN221547131U - Non-road engine evaporation control system - Google Patents
Non-road engine evaporation control system Download PDFInfo
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- CN221547131U CN221547131U CN202420150998.2U CN202420150998U CN221547131U CN 221547131 U CN221547131 U CN 221547131U CN 202420150998 U CN202420150998 U CN 202420150998U CN 221547131 U CN221547131 U CN 221547131U
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Abstract
本实用新型公开了一种非道路式发动机蒸发控制系统，包括发动机本体、燃油供给装置、蒸气吸附装置和燃油箱，蒸气吸附装置设有与大气连通的通气口、与燃油箱连通的吸附口和与发动机连接的脱附口，燃油蒸气从燃油箱出来后经过蒸气吸附装置和燃油供给装置进入发动机，其中：燃油供给装置和蒸气吸附装置之间还设有二次吸附装置。本实用新型中，利用二次吸附装置对经过一次吸附的燃油蒸气进行二次吸附，能够提高对燃油蒸气的吸附效果，也就降低了发动机的蒸发排放值，保证排放的蒸气能达到更高要求的排放标准，减少对大气的污染。
The utility model discloses a non-road engine evaporation control system, including an engine body, a fuel supply device, a vapor adsorption device and a fuel tank, wherein the vapor adsorption device is provided with a vent connected to the atmosphere, an adsorption port connected to the fuel tank and a desorption port connected to the engine, and the fuel vapor enters the engine through the vapor adsorption device and the fuel supply device after coming out of the fuel tank, wherein: a secondary adsorption device is further provided between the fuel supply device and the vapor adsorption device. In the utility model, the secondary adsorption device is used to perform secondary adsorption on the fuel vapor that has been adsorbed once, which can improve the adsorption effect on the fuel vapor, thereby reducing the evaporative emission value of the engine, ensuring that the discharged vapor can meet higher emission standards, and reducing pollution to the atmosphere.
Description
Technical Field
The utility model relates to an engine evaporation control system, in particular to an off-road engine evaporation control system.
Background
Off-road engines refer to engines for mechanical devices operating on off-highway roads for the purpose of distinguishing from engines used on road vehicles to facilitate the establishment of corresponding emission standards. At present, most of non-road engines adopt gasoline, the gasoline is volatile liquid, and a fuel tank is always filled with steam at normal temperature, so that the steam is usually introduced into an adsorption device for avoiding direct discharge of fuel steam into the atmosphere and pollution of the atmosphere, the adsorption device is utilized for adsorbing the fuel steam, and when the engine is started, the absorbed fuel steam reenters a working unit for combustion, so that the purposes of saving fuel and protecting environment are achieved.
As disclosed in chinese patent document CN218030387U, a non-road mobile machine is disclosed, which comprises a fuel storage device, a fuel supply device, a vapor adsorption device, and an engine body, wherein the vapor adsorption device is provided with a vent port communicating with the atmosphere, a vapor discharge hole of the fuel storage device communicates with an adsorption port of the vapor adsorption device, and a valve mechanism connected between a desorption port of the vapor adsorption device and an intake passage of the engine body, and the valve mechanism is a valve mechanism that is turned on as the engine body operates and is blocked as the engine body stops operating.
Also, for example, chinese patent document CN116357482a discloses a novel fuel evaporation and adsorption system, which comprises: the fuel tank, the active carbon tank, the fuel vapor recovery control valve, the ECU, the carbon tank electromagnetic valve, the throttle valve and the engine air inlet manifold are used in a combined mode, redundant fuel vapor in the active carbon tank is recovered to a desorption pipeline through controlling the fuel vapor recovery control valve and enters the engine air inlet manifold along with fresh air, the fuel vapor outside an automobile is effectively reduced, the energy consumption of the automobile is reduced, the fuel of the automobile is saved, the environment is also protected, the problem that after the fuel vapor in the fuel tank is adsorbed to the carbon tank, the active carbon tank is saturated quickly, oil gas cannot be absorbed continuously, the redundant fuel vapor is discharged to the atmosphere, and secondary pollution is caused is solved.
In the prior art, the adsorption device is used for adsorbing the fuel vapor so as to prevent the pollution of the fuel vapor to the atmosphere. However, as the emission standards of vehicles become more stringent, the vapor emitted in the prior art will not meet the emission standards of higher requirements, and there is still a problem of emissions exceeding standards.
Disclosure of utility model
The utility model provides a non-road engine evaporation control system for solving the technical problem that the emission of an engine in the prior art exceeds standard, which comprises an engine body, a fuel supply device, a vapor adsorption device and a fuel tank, wherein the vapor adsorption device is provided with a vent communicated with the atmosphere, an adsorption port communicated with the fuel tank and a desorption port connected with the engine, and fuel vapor enters the engine through the vapor adsorption device and the fuel supply device after exiting from the fuel tank, wherein the vapor adsorption device is provided with a vent communicated with the atmosphere, and the desorption port is connected with the engine, wherein the fuel vapor enters the engine through the vapor adsorption device and the fuel supply device: a secondary adsorption device is arranged between the fuel oil supply device and the vapor adsorption device.
Compared with the prior art, in the scheme, the secondary adsorption device is utilized to carry out secondary adsorption on the fuel vapor after primary adsorption, so that the adsorption effect on the fuel vapor can be improved, the evaporation emission value of the engine is reduced, the emitted vapor can reach the emission standard with higher requirements, and the pollution to the atmosphere is reduced.
Preferably, the fuel supply means is provided with a balance hole which communicates with the fuel tank. In this scheme, set up fuel feeding device's balance hole and fuel tank intercommunication back, fuel feeding device exhaust fuel vapor enters into the fuel tank in, then absorbs by vapor adsorption device, is favorable to reducing evaporation emission.
Preferably, the fuel supply means is provided with a balance hole which communicates with the conduit between the fuel tank and the vapour adsorbing means. In this scheme, fuel supply device exhaust steam gets into vapor adsorption equipment through the pipeline between fuel tank and the vapor adsorption equipment, absorbs by vapor adsorption equipment, is favorable to reducing evaporation emission.
Preferably, the fuel supply means is provided with a balance hole communicating with a conduit between the vapour adsorption means and the secondary adsorption means. In this scheme, fuel feeding device exhaust steam gets into secondary adsorption equipment through the pipeline between vapor adsorption equipment and the secondary adsorption equipment, carries out secondary adsorption by secondary adsorption equipment, is favorable to reducing evaporation emission.
Preferably, an air filter device is arranged between the secondary adsorption device and the fuel supply device. In this scheme, utilize the air filter who sets up to filter the air that gets into fuel feeding device, extension engine's life.
Preferably, the secondary adsorption device employs a carbon canister. The carbon tank is used as a common adsorption device, and the carbon tank is used as a secondary adsorption device, so that the improvement difficulty is reduced, and the evaporation emission reduction performance is further improved.
Preferably, the fuel supply means is a carburetor, an electronic injection valve or an electronic injection pump. In this scheme, carburetor, electronic fuel injection valve body and electronic fuel injection pump are the equipment of the supply fuel for the inlet channel of engine body of technology maturity to be favorable to reducing the improvement degree of difficulty, further improve the performance that reduces the evaporation emission.
The utility model has the following beneficial effects: compared with the prior art, in the scheme, the secondary adsorption device is utilized to carry out secondary adsorption on the fuel vapor after primary adsorption, so that the adsorption effect on the fuel vapor can be improved, the evaporation emission value of the engine is reduced, the emitted vapor can reach the emission standard with higher requirements, and the pollution to the atmosphere is reduced.
Drawings
FIG. 1 is a schematic diagram of an off-road engine evaporative control system according to an embodiment of the present utility model.
Detailed Description
The following is a further detailed description of the embodiments:
1. Definition of the definition
Vapor adsorption device: the steam adsorption device is a tank body with active carbon inside.
Carbon tank: the inside is filled with activated carbon with strong adsorptivity.
2. Reference numerals in the drawings of the specification include: a fuel tank 1, a vapor adsorption device 2, a vent 21, an adsorption port 22, a desorption port 23, a secondary adsorption device 3, an air filtration device 4, a fuel supply device 5, and an engine body 6.
An example is substantially as shown in figure 1: the utility model provides an off-road engine evaporation control system, includes engine body 6, fuel feeding device 5, vapour adsorption equipment 2, fuel tank 1, secondary adsorption equipment 3 and air filter 4, and the air vent 21, adsorption port 22 and the desorption mouth 23 that vapour adsorption equipment 2 was equipped with, and secondary adsorption equipment 3 is equipped with import and export, and fuel feeding device 5 is equipped with the balance hole. The secondary adsorption device 3 adopts a carbon tank, and the fuel supply device 5 is a carburetor, an electronic injection valve body or an electronic injection pump.
The fuel tank 1 is communicated with an adsorption port 22 of the vapor adsorption device 2 through a pipeline, a desorption port 23 of the vapor adsorption device 2 is communicated with an inlet of the secondary adsorption device 3 through a pipeline, an outlet of the secondary adsorption device 3 is communicated with the air filtering device 4 through a pipeline, the air filtering device 4 is communicated with the fuel supply device 5 through a pipeline, and the fuel supply device 5 is connected with the engine body 6. The components are connected through pipelines.
In this embodiment, the balance hole of the fuel supply device 5 communicates with the pipe between the vapor adsorption device 2 and the secondary adsorption device 3. In other embodiments, the balance hole communicates with the conduit between the fuel tank 1 and the vapor adsorption device 2 or directly with the fuel tank 1.
The specific implementation process is as follows: when the engine body 6 is not in operation, fuel vapor in the fuel tank 1 enters the vapor adsorption device 2 through the pipe and is adsorbed. When the engine body 6 works, under the action of negative pressure, the fuel vapor adsorbed in the vapor adsorption device 2 is desorbed and discharged from the desorption port 23 and then enters the secondary adsorption device 3 for secondary adsorption. The fuel vapor after the secondary adsorption enters the engine body 6 together with air to burn.
The foregoing is merely an embodiment of the present utility model, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application date or before the priority date, can know all the prior art in the field, and has the capability of applying the conventional experimental means before the date, and a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present utility model, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420150998.2U CN221547131U (en) | 2024-01-22 | 2024-01-22 | Non-road engine evaporation control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420150998.2U CN221547131U (en) | 2024-01-22 | 2024-01-22 | Non-road engine evaporation control system |
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| Publication Number | Publication Date |
|---|---|
| CN221547131U true CN221547131U (en) | 2024-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202420150998.2U Active CN221547131U (en) | 2024-01-22 | 2024-01-22 | Non-road engine evaporation control system |
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| CN (1) | CN221547131U (en) |
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- 2024-01-22 CN CN202420150998.2U patent/CN221547131U/en active Active
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