CN211549810U

CN211549810U - Electric heating fuel mixer and DPF system

Info

Publication number: CN211549810U
Application number: CN201922147708.0U
Authority: CN
Inventors: 黄凯; 朱光贞; 王科星; 邢喜春; 桂莹; 朱宏志
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-09-22
Anticipated expiration: 2029-12-04

Abstract

The utility model relates to the field of automotive technology, a electricity adds hot fuel blender and DPF system is disclosed. An electrically heated fuel mixer includes a mixing module including a first mixing element for mixing fuel and gas and a second mixing element for extending a mixing time of the fuel and gas, the first mixing element being disposed upstream of the second mixing element; the heating assembly is used for heating the first mixing part and the second mixing part. The utility model provides an electricity adds hot fuel blender can let fuel and high temperature exhaust misce bene, lets fuel fully release heat, has reduced the risk that produces fuel liquid drop or coking.

Description

Electric heating fuel mixer and DPF system

Technical Field

The utility model relates to the field of automotive technology, especially, relate to an electricity adds hot fuel mixer and DPF system.

Background

With the increasing number of motor vehicles, the emission of automobile exhaust becomes a main pollution source for urban residents. In order to reduce pollution and implement emission regulations, an aftertreatment unit assembly is generally adopted to simultaneously reduce emission and accelerate noise outside a vehicle to meet the corresponding regulations.

Compared with the fourth and fifth stages in China, the limit value of the exhaust pollutants in the six-stage emission regulation in China increases the limit requirements on the quantity and quality of particulate matters, so that a Diesel Particulate Filter (DPF) is additionally arranged on the basis of selecting a catalytic reduction post-processor (SCR).

The DPF after-treatment device needs to perform active regeneration on the filtered particulate matters periodically, and then fuel is injected to realize a temperature-rising active regeneration process. This requires thorough mixing and warming of the fuel injected into the aftertreatment device with the high temperature exhaust gas. The uniformity of the fuel directly determines the temperature uniformity and the temperature rise effect in the regeneration process, so a fuel mixer is required to be additionally arranged to ensure that the fuel is fully crushed and mixed with high-temperature exhaust gas. In addition, because it is difficult to sufficiently crush, gasify and release heat when the temperature condition of the fuel is low and the high-temperature exhaust flow rate is small, leakage of fuel droplets and coking and carbonization of incomplete combustion are often caused when the incomplete combustion heat release is generated downstream of the injection, which requires ensuring sufficient heat release of the fuel when the temperature condition is low and the high-temperature exhaust flow rate is small.

Therefore, there is a need for an electrically heated fuel mixer and DPF system that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electricity adds hot fuel blender and DPF system can let fuel and high temperature exhaust misce bene, lets fuel fully release heat, has reduced the risk that produces fuel liquid drop or coking.

To achieve the purpose, the utility model adopts the following technical proposal:

an electrically heated fuel mixer comprising:

a mixing module comprising a first mixing element for mixing fuel and gas and a second mixing element for extending the mixing time of fuel and gas, the first mixing element being placed upstream of the second mixing element;

a heating assembly for heating the first mixing member and the second mixing member.

Preferably, the mixing module comprises a housing, the first mixing part and the second mixing part being mounted within the housing, the heating assembly being mounted outside the housing.

Preferably, the first mixing part comprises a frame, the outer side surface of the frame is provided with saw teeth along the circumferential direction, and the inner side of the frame is provided with a metal wire which surrounds along the circumferential direction of the frame.

Preferably, the second mixing part comprises a plurality of metal fins arranged at intervals, and one end of each metal fin, which is opposite to the first mixing part, is provided with a plurality of bent plates bent towards one side and/or the other side of each metal fin.

Preferably, the number of the bending plates is at least three, the bending directions of the adjacent bending plates are different, and the bending plate arranged in the middle of the metal fin is provided with an opening.

Preferably, the first mixing part and the second mixing part are connected, and the heating assembly is electrically connected to the first mixing part or the second mixing part.

Preferably, still include the intake pipe, the one end of intake pipe with the shell sets up the one end of first mixed part is connected, be equipped with the fuel nozzle seat on the lateral wall of intake pipe, be equipped with the fuel entry on the fuel nozzle seat, the fuel entry with the intake pipe intercommunication.

Preferably, the shell is sleeved with a first connecting plate, and the first connecting plate is arranged in the middle of the shell.

A DPF system comprises the electrically heated fuel mixer.

Preferably, the mixing module further comprises a post-processor assembly, and the post-processor assembly is connected with one end of the mixing module, which is provided with the second mixing part.

The utility model has the advantages that:

the utility model provides an electricity adds hot-fuel mixer is including the first mixing piece and the second mixing piece that set gradually, makes fuel and gas pass through first mixing piece earlier, and first mixing piece is broken, is decomposed fuel, has improved the area of contact of fuel with gaseous, has reduced the size of fuel liquid drop, is favorable to evaporating the atomizing, and the second mixing piece further mixes fuel and gas, prolongs the mixing time of fuel and gas, sets up first mixing piece and second mixing piece, has improved the homogeneity of fuel and gas mixture; the heating assembly heats the first mixing part and the second mixing part, so that the fuel can fully release heat, and the risk of generating fuel droplets or coking is reduced.

The utility model provides a DPF system can regularly carry out DPF regeneration, has improved fuel and gas mixing homogeneity, has reduced the risk of fuel formation liquid drop and coking.

Drawings

Fig. 1 is a schematic structural diagram of an electrically heated fuel mixer provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a hybrid module according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first mixing part of a mixing module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a second mixing part of a mixing module provided in an embodiment of the present invention;

fig. 5 is a system diagram of a DPF system according to an embodiment of the present invention.

In the figure:

1. a mixing module; 11. a housing; 121. a frame; 122. saw teeth; 123. a metal wire; 131. a metal fin; 132. a bending plate; 133. an opening;

2. a heating assembly;

3. an air inlet pipe;

4. a fuel nozzle carrier; 41. a fuel inlet;

5. a first connecting plate;

6. a second connecting plate;

100. electrically heating the fuel mixer; 101. a post-processor assembly; 102. an engine; 103. a fuel tank; 104. a battery for an automobile.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1, the present embodiment provides an electrically heated fuel mixer including a mixing module 1 and a heating assembly 2, the mixing module 1 including a first mixing part for mixing fuel and gas and a second mixing part for extending a mixing time of the fuel and gas, the first mixing part being disposed upstream of the second mixing part, the heating assembly 2 being for heating the first mixing part and the second mixing part. The electric heating fuel mixer provided by the embodiment comprises a first mixing part and a second mixing part which are sequentially arranged, so that fuel and gas firstly pass through the first mixing part, the first mixing part is used for crushing and decomposing the fuel, the contact area of the fuel and the gas is increased, the size of fuel droplets is reduced, evaporation and atomization are facilitated, the fuel and the gas are further mixed by the second mixing part, the mixing time of the fuel and the gas is prolonged, and the uniformity of mixing of the fuel and the gas is improved by arranging the first mixing part and the second mixing part; the heating assembly 2 heats the first mixing member and the second mixing member, so that the fuel can fully release heat, and the risk of generating fuel droplets or coking is reduced.

Specifically, the electricity adds hot fuel blender still includes intake pipe 3, and the one end and the mixing module 1 of intake pipe 3 are connected, and make first mixed piece be close to intake pipe 3 and set up, and the other end of intake pipe 3 is equipped with second connecting plate 6, and second connecting plate 6 is used for being connected with the gas outgoing part. The preferred flange board of second connecting plate 6, the flange board is welded with the tip of intake pipe 3, conveniently installs intake pipe 3 on the gas outgoing part. The side wall of the air inlet pipe 3 is provided with a fuel nozzle seat 4, the fuel nozzle seat 4 is provided with a fuel inlet 41, and the fuel inlet 41 is communicated with the air inlet pipe 3. The fuel enters the intake pipe 3 through the fuel inlet 41 and is mixed with the gas discharged from the gas discharge part. In this embodiment, the pipe wall of the air inlet pipe 3 is provided with a hole, the fuel nozzle seat 4 is correspondingly arranged at the hole, and the fuel nozzle seat 4 is welded on the air inlet pipe 3 in a welding mode, so that the sealing performance is good, and the connection reliability is high.

In the present embodiment, the mixing module 1 includes a housing 11, the first mixing part and the second mixing part are installed in the housing 11, the heating assembly 2 is installed outside the housing 11, and one end of the housing 11 is connected to the intake duct 3. First mixing element and second mixing element are connected with the inside wall of shell 11 respectively, and first mixing element and second mixing element are connected, and heating element 2 is connected with first mixing element or second mixing element electricity, can heat first mixing element and second mixing element simultaneously, have simplified the connection structure of heating element 2 and first mixing element and second mixing element. The heating assembly 2 is arranged to raise the exhaust temperature, greatly promote the decomposition and evaporation of the fuel and also enable the fuel attached to the inner wall of the shell 11 to be gasified and evaporated under the condition of electric heating. In addition, the heating temperature can be increased, so that the fuel and the gas are subjected to thermal reaction in the mixing module 1, and the condition for the active regeneration of the DPF can be provided by replacing a diesel oxidation catalyst inside the postprocessor assembly.

In the present embodiment, as shown in fig. 2 and 3, the first mixing member includes a frame 121, the frame 121 is connected to an inner side wall of the housing 11, an outer side surface of the frame 121 is provided with serrations 122 in a circumferential direction, and an inner side of the frame 121 is provided with a wire 123 circumferentially wound around the frame 121. After the first mixing member is mounted on the housing 11, there is a gap between the outer side of the frame 121 and the housing 11, and a part of the mixture of gas and fuel can enter the second mixing member from between the saw teeth 122, and a part of the mixture of gas and fuel can enter the second mixing member from between the wires 123. The structure of the first mixing part can effectively crush and decompose the sprayed fuel, so that the contact area of the fuel and air flow is increased, the size of fuel liquid drops is reduced, evaporation and atomization are facilitated, and the mixing uniformity of the fuel and gas is improved. The metal wire 123 intercepts and rectifies the gas flow, and the impact force of the gas on the fuel droplets is improved.

In the present embodiment, as shown in fig. 4, the second mixing member includes a plurality of metal fins 131 arranged at intervals, and both ends of the metal fins 131 are respectively connected to the inner side wall of the housing 11. An end of the metal fin 131 opposite to the first mixing member is provided with a plurality of bent plates 132, and the plurality of bent plates 132 are bent toward one side and/or the other side of the metal fin 131. Preferably, the bending plates 132 are provided in at least three, and the directions in which the adjacent bending plates 132 are bent are different. The metal fins 131 with the bent plates 132 are provided to further mix the fuel and the gas, and the gas flow is made to generate a swirling flow, thereby increasing the distance of the gas flow passing through the second mixing member in a swirling manner, and further improving the mixing uniformity of the fuel and the gas.

Preferably, the bent plate 132 disposed at the middle of the metal fin 131 is opened with an opening 133, and the mixture of the fuel and the gas flows through the opening 133 to change the flow direction of the gas flow, so as to make the gas and the fuel contact more sufficiently in a disturbance-enhancing manner.

In this embodiment, the electrically heated fuel mixer needs to be connected with the post-processor assembly, in order to ensure the sealing performance of the connection between the two and prevent the occurrence of fuel leakage, the first connecting plate 5 is sleeved on the housing 11 of the mixing module 1 in this embodiment, and the first connecting plate 5 is disposed in the middle of the housing 11. After the electrically heated fuel mixer is connected with the post-processor assembly, the end part of the shell 11 of the mixing module 1 is inserted into the post-processor assembly, the outer side wall of the shell 11 is attached to the inner side wall of the post-processor assembly, and the first connecting plate 5 is used for being connected with the post-processor assembly. Preferably, the first connecting plate 5 is a flange plate, which is welded to the housing 11, for easy mounting and dismounting.

As shown in fig. 5, the present embodiment further provides a DPF system comprising an after-processor assembly 101 and the above-mentioned electrically heated fuel mixer 100, wherein the after-processor assembly 101 is connected to an end of the mixing module 1 where the second mixing element is provided. In the embodiment, the air inlet end of the air inlet pipe 3 of the electrically heated fuel mixer 100 is connected with the exhaust port of the engine 102, the gas with particulate matters discharged from the engine 102 enters the air inlet pipe 3, the fuel in the fuel tank 103 enters the air inlet pipe 3 through the fuel nozzle seat 4, the gas and the fuel are mixed sequentially through the first mixing part and the second mixing part and then enter the post-processor assembly 101, and the automobile battery 104 supplies power to the heating component 2 in the mixing process.

The fuel in this embodiment may be fuel oil, urea, natural gas, etc., and is not limited herein.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An electrically heated fuel mixer, comprising:

a mixing module (1), the mixing module (1) comprising a first mixing element for mixing fuel and gas and a second mixing element for extending the mixing time of fuel and gas, the first mixing element being placed upstream of the second mixing element;

a heating assembly (2) for heating the first and second mixing members.

2. The electrically heated fuel mixer according to claim 1, characterized in that the mixing module (1) comprises a housing (11), the first and second mixing elements being mounted inside the housing (11), the heating assembly (2) being mounted outside the housing (11).

3. The electrically heated fuel mixer according to claim 1 or 2, wherein the first mixing member comprises a frame (121), the outer side of the frame (121) being circumferentially provided with serrations (122), the inner side of the frame (121) being provided with a wire (123) circumferentially surrounding the frame (121).

4. The electrically heated fuel mixer according to claim 1 or 2, wherein the second mixing member comprises a plurality of spaced apart metal fins (131), and an end of the metal fins (131) opposite to the first mixing member is provided with a plurality of bent plates (132) bent toward one side and/or the other side of the metal fins (131).

5. The electrically heated fuel mixer according to claim 4, wherein the bent plates (132) are provided in at least three numbers, adjacent ones of the bent plates (132) are bent in different directions, and the bent plates (132) disposed at the central portions of the metal fins (131) are opened with openings (133).

6. The electrically heated fuel mixer according to claim 1, wherein the first mixing piece and the second mixing piece are connected, the heating assembly (2) being electrically connected to the first mixing piece or the second mixing piece.

7. The electrically heated fuel mixer according to claim 2, further comprising an air inlet pipe (3), one end of the air inlet pipe (3) being connected to the one end of the first mixing part, which is provided with a fuel nozzle holder (4) on the side wall of the air inlet pipe (3), a fuel inlet (41) being provided on the fuel nozzle holder (4), the fuel inlet (41) being communicated with the air inlet pipe (3).

8. The electrically heated fuel mixer according to claim 2, wherein the first connecting plate (5) is sleeved on the housing (11), and the first connecting plate (5) is disposed at a middle portion of the housing (11).

9. A DPF system comprising the electrically heated fuel mixer of any of claims 1-8.

10. The DPF system of claim 9, further comprising an after-processor assembly (101), the after-processor assembly (101) being connected to an end of the mixing module (1) where the second mixing piece is provided.