Fuel conveying system capable of reducing noise and automobile

Abstract

The utility model provides a fuel delivery system capable of reducing noise and an automobile, which relate to the technical field of power and are used for realizing communication between a carbon tank and an engine. Two ends of the first pipeline are respectively connected with the input end of the electromagnetic valve and the output end of the carbon tank; the buffering cavity is connected with the first pipeline in the fuel conveying direction, and the sectional area of the buffering cavity is larger than that of the first pipeline; when fuel steam is adsorbed to the engine, the fuel steam can be buffered at the position of the buffering cavity, at the moment, the buffering cavity can relieve pressure fluctuation and impact in the flowing process of the fuel steam, pulse noise of the fuel steam is reduced, and stability and reliability in the conveying process of the fuel steam are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power technology field, more specifically, relate to a fuel delivery system and car of reducing noise. BACKGROUND

[0002] The carbon tank is mainly filled with activated carbon, which has strong adsorption capacity. Its role is to adsorb fuel vapor to prevent fuel vapor in the fuel tank from evaporating into the air, causing environmental pollution and waste. When the vehicle is started again, the fuel vapor in the carbon tank will complete the desorption process and be mixed with fresh air sent from the bottom of the carbon tank before being sent to the engine for combustion.

[0003] Currently, in order to meet the emission regulations, the electromagnetic valve between the carbon tank and the engine needs to be frequently opened and closed to desorb the fuel vapor in the carbon tank, so the fuel vapor in the pipeline will produce pressure fluctuation (i.e. pressure pulsation) and exist pulsation sound, and the noise is relatively large. SUMMARY

[0004] The utility model discloses a fuel delivery system and car of reducing noise to solve the problem of the fuel delivery system between the existing carbon tank and the engine in the background art, which has the problem of pulsation sound and relatively large noise due to pressure fluctuation in the pipeline.

[0005] To achieve the above object, the utility model provides a fuel delivery system for realizing the communication between the carbon tank and the engine, which comprises:

[0006] An electromagnetic valve, the output end of the electromagnetic valve is connected with the input end of the engine;

[0007] A first pipeline, both ends of the first pipeline are connected with the input end of the electromagnetic valve and the output end of the carbon tank respectively;

[0008] A buffer cavity, the buffer cavity is connected with the first pipeline along the direction of fuel delivery, and the cross-sectional area of the buffer cavity is larger than that of the first pipeline.

[0009] Preferably, the first pipeline comprises two connecting pipes, one end of each of the two connecting pipes is connected with one end of the buffer cavity.

[0010] Preferably, the cross section of the buffer cavity is circular, and the cross-sectional diameter of the buffer cavity is larger than that of the first pipeline.

[0011] Preferably, the electromagnetic valve comprises a driving mechanism, a valve core and a sealing surface arranged on the side of the passage, the output end of the driving mechanism is connected with the valve core, the valve core is arranged opposite to the sealing surface, and the valve core can be attached to or separated from the sealing surface when the driving mechanism is driven.

[0012] Preferably, the end of the valve core opposite to the sealing surface is provided with a rubber surface.

[0013] Preferably, the noise-reducing fuel delivery system further comprises a controller, and the controller is electrically connected with the electromagnetic valve.

[0014] Preferably, the noise-reducing fuel delivery system further comprises a slow closing electronic element, the slow closing electronic element is connected to the interface circuit of the controller for electrical connection with the electromagnetic valve, and the slow closing electronic element can control the electromagnetic valve to slowly close.

[0015] Preferably, the slow closing electronic element is a freewheeling diode.

[0016] Preferably, the noise-reducing fuel delivery system further comprises a second pipeline, and two ends of the second pipeline are respectively connected with the output end of the electromagnetic valve and the input end of the engine.

[0017] A car comprises a noise-reducing fuel delivery system.

[0018] The fuel delivery system of the utility model has the beneficial effect that the buffer cavity of the fuel delivery system is connected with the first pipeline along the direction of fuel delivery, the cross-sectional area of the buffer cavity is larger than that of the first pipeline, when fuel vapor is adsorbed to the engine, the fuel vapor can be buffered at the position of the buffer cavity, at this time, the buffer cavity can slow down the pressure fluctuation and impact in the fuel vapor flow process, reduce the fuel vapor pulsation noise, and improve the stability and reliability of the fuel vapor delivery process.

[0019] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and other objects, features and advantages of the utility model will become more apparent from the following detailed description of exemplary embodiments of the utility model, taken in conjunction with the accompanying drawings in which like reference characters typically identify corresponding components throughout the typical embodiment of the utility model.

[0021] Figure 1 Fig. 1 shows a connection structure schematic diagram of a noise-reducing fuel delivery system according to one embodiment of the utility model;

[0022] Figure 2 Fig. 1 shows a schematic diagram of an electromagnetic valve opening structure of a fuel delivery system with reduced noise according to an embodiment of the present application;

[0023] Figure 3 Fig. 2 shows a schematic diagram of an electromagnetic valve closing structure of a fuel delivery system with reduced noise according to an embodiment of the present application;

[0024] Figure 4 Fig. 3 shows a schematic diagram of an interface circuit of a fuel delivery system with reduced noise according to an embodiment of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, carbon canister; 2, engine; 3, electromagnetic valve; 31, valve core; 32, sealing surface; 4, first pipeline; 5, buffer cavity; 6, controller; 61, interface circuit; 7, buffer electronic element; 8, second pipeline. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present application will be described in more detail below. Although the preferred embodiments of the present application are described below, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly and completely conveyed to those skilled in the art, and the scope of the present application can be fully conveyed to those skilled in the art.

[0028] As shown in Figure 1 The present application provides a fuel delivery system with reduced noise for realizing the communication between a carbon canister 1 and an engine 2, which comprises:

[0029] An electromagnetic valve 3, wherein the output end of the electromagnetic valve 3 is connected to the input end of the engine 2;

[0030] A first pipeline 4, wherein both ends of the first pipeline 4 are respectively connected to the input end of the electromagnetic valve 3 and the output end of the carbon canister 1;

[0031] A buffer cavity 5, wherein the buffer cavity 5 is connected to the first pipeline 4 along the direction of fuel delivery, and the cross-sectional area of the buffer cavity 5 is greater than that of the first pipeline 4.

[0032] Specifically, to solve the problem that fuel vapor in the pipeline of the existing fuel delivery system between the carbon tank and the engine has pulsating sound due to pressure fluctuation when working, the utility model provides a fuel delivery system with reduced noise, fuel delivered by the fuel delivery system can be fuel vapor, the buffer cavity 5 of the fuel delivery system is connected with the first pipeline 4 in the direction of fuel delivery, the cross-sectional area of the buffer cavity 5 is greater than that of the first pipeline 4, when fuel vapor is adsorbed to the engine 3, the fuel vapor can be buffered at the position of the buffer cavity 5, at this time, the buffer cavity 5 can slow down the pressure fluctuation and impact in the fuel vapor flow process, reduce the pulsating noise of fuel vapor, and improve the stability and reliability of the fuel vapor delivery process.

[0033] Preferably, the first pipeline 4 comprises two connecting pipes, one end of the two connecting pipes is connected with two ends of the buffer cavity 5 respectively.

[0034] Specifically, the other end of the two connecting pipes is connected with the input end of the electromagnetic valve 3 and the output end of the carbon tank 1 respectively.

[0035] The cross section of the buffer cavity 5 is circular, and the cross-sectional diameter of the buffer cavity 5 is greater than that of the first pipeline 4.

[0036] Specifically, the buffer cavity 5 is designed on the first pipeline 4, the diameter of the buffer cavity 5 is greater than that of the first pipeline 4, so that the fuel vapor is buffered during the process of being adsorbed to the engine 2, and the pulsating noise of the fuel vapor is reduced.

[0037] As shown in Figure 2 and Figure 3 Preferably, the electromagnetic valve 3 comprises a driving mechanism, a valve core 31 and a sealing surface 32 arranged on the side of the passage, the output end of the driving mechanism is connected with the valve core 31, the valve core 31 is arranged opposite to the sealing surface 32, and the valve core 31 can be attached to or separated from the sealing surface 32 when driven by the driving mechanism.

[0038] The end opposite to the sealing surface 32 of the valve core 31 is provided with a rubber surface.

[0039] To solve the problem that the valve core 31 in the internal valve core 31 of the existing fuel delivery system needs to be in close contact with the sealing surface 32 to meet the sealing property of the electromagnetic valve body, so that the working noise of the internal valve core 31 inevitably collides with the sealing surface 32 during the movement, the utility model provides an electromagnetic valve with low single noise, the valve core 31 of the electromagnetic valve is a metal valve core 31, the rubber surface is connected to the end opposite to the sealing surface 32 of the valve core 31, the sound of the impact on the sealing surface 11 is as small as possible through the buffering of the rubber surface, the working noise of the electromagnetic valve 3 is reduced, and the noise of the entire fuel delivery system is further reduced.

[0040] Preferably, the noise-reducing fuel delivery system further includes a controller 6, which is electrically connected to the solenoid valve 3.

[0041] Specifically, controller 6 controls the switching of solenoid valve 3 via PWM signal. The ground terminal of this circuit is connected to a MOSFET as a controllable switch. When the MOSFET is turned on, there is a potential difference across solenoid valve 3, that is, solenoid valve 3 is energized and opens. When the MOSFET is turned off, there is no potential difference across solenoid valve 3, that is, solenoid valve 1 is de-energized and closes.

[0042] like Figure 4 As shown, preferably, the noise-reducing fuel delivery system also includes a slow-closing electronic component 7, which is connected to the interface line 61 of the controller 6 for electrical connection with the solenoid valve 3. The slow-closing electronic component 7 can control the solenoid valve 3 to close slowly.

[0043] Specifically, the slow-closing electronic component 7 is a freewheeling diode. With the addition of the freewheeling diode, when the MOSFET is turned off, the potential difference across the solenoid valve 3 decreases slowly, thereby the current decreases slowly. This allows the solenoid valve 3 to close slowly, preventing the valve core 31 from rapidly impacting the sealing surface 11. Therefore, the operating noise of the solenoid valve 3 can be further reduced.

[0044] Preferably, the noise-reducing fuel delivery system further includes a second pipeline 8, the two ends of which are connected to the output end of the solenoid valve 3 and the input end of the engine 2, respectively.

[0045] A car that includes a fuel delivery system that reduces noise.

[0046] In summary, when the noise-reducing fuel delivery system of this application is implemented in an automobile, a low-noise solenoid valve 3 is used. The valve core 31 of the solenoid valve 3 is cushioned by a rubber surface to minimize the sound of impacting the sealing surface 32, thereby reducing the operating noise of the solenoid valve 3. At the same time, a freewheeling diode is connected to the interface line of the controller 6 for electrical connection with the solenoid valve 3, so that the valve core 31 of the solenoid valve 3 closes slowly, further reducing the operating noise of the solenoid valve 3. In addition, a buffer cavity 5 is designed on the first pipeline 4. The diameter of the buffer cavity 5 is larger than the diameter of the first pipeline 4, so that the fuel vapor is buffered during the process of being adsorbed into the engine 2, reducing the fuel vapor pulsation noise. By improving the interface line 61 of the solenoid valve 3, the first pipeline 4, and the controller 6, the noise of the entire fuel delivery system during operation can be reduced.

[0047] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A noise reducing fuel delivery system for effecting communication of a carbon canister and an engine, characterized by, The fuel delivery system comprises: a solenoid valve, an output end of the solenoid valve being connected with an input end of the engine; a first pipeline, two ends of the first pipeline being respectively connected with an input end of the solenoid valve and an output end of the carbon canister; a buffer cavity, the buffer cavity being connected with the first pipeline along a direction of fuel delivery, a cross-sectional area of the buffer cavity being greater than a cross-sectional area of the first pipeline.

2. A noise reducing fuel delivery system as defined in claim 1, wherein, The first pipeline comprises two connecting pipes, one end of each of the two connecting pipes being connected with two ends of the buffer cavity.

3. A fuel delivery system of claim 2 wherein, The cross section of the buffer cavity is circular, a cross-sectional diameter of the buffer cavity being greater than a cross-sectional diameter of the first pipeline.

4. A noise reducing fuel delivery system as defined in claim 1, wherein, The solenoid valve comprises a driving mechanism, a valve core and a sealing surface arranged on a circumferential side of a passage, an output end of the driving mechanism being connected with the valve core, the valve core being oppositely arranged with the sealing surface, the valve core being capable of being attached to or separated from the sealing surface when being driven by the driving mechanism.

5. A fuel delivery system of claim 4 wherein, One end of the valve core opposite to the sealing surface is provided with a rubber surface.

6. A noise reducing fuel delivery system as defined in claim 1, wherein, The noise-reducing fuel delivery system further comprises a controller, the controller being electrically connected with the solenoid valve.

7. A noise reducing fuel delivery system as defined in claim 6, wherein, The noise-reducing fuel delivery system further comprises a slow-closing electronic element, the slow-closing electronic element being connected on an interface circuit for electrically connecting the controller with the solenoid valve, the slow-closing electronic element being capable of controlling the solenoid valve to slowly close.

8. A noise reducing fuel delivery system as defined in claim 7, wherein, The slow-closing electronic element is a freewheeling diode.

9. A noise reducing fuel delivery system as in claim 1, wherein, The noise-reducing fuel delivery system further comprises a second pipeline, two ends of the second pipeline being respectively connected with an output end of the solenoid valve and an input end of the engine.

10. An automobile characterized by comprising: The noise-reducing fuel delivery system comprises any one of the noise-reducing fuel delivery systems according to claims 1-9.

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