CN214698010U - Test bench for detecting accuracy of hydrocarbon injection system - Google Patents
Test bench for detecting accuracy of hydrocarbon injection system Download PDFInfo
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- CN214698010U CN214698010U CN202120715192.XU CN202120715192U CN214698010U CN 214698010 U CN214698010 U CN 214698010U CN 202120715192 U CN202120715192 U CN 202120715192U CN 214698010 U CN214698010 U CN 214698010U
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- urea pump
- injection system
- hydrocarbon injection
- fuel
- mixer
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- 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
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Abstract
The utility model belongs to the technical field of diesel particle trappers, in particular to a test bed for detecting the precision of a hydrocarbon injection system, which comprises a urea pump, a heater, an automobile mixer and an electronic control unit; the urea pump is connected with the hydrocarbon injection system through an injection pipe and is configured to provide heated and pressurized fuel oil for the hydrocarbon injection system; the automobile mixer is communicated with the urea pump, and fuel oil is arranged in the automobile mixer and used for providing heated fuel oil for the urea pump; the heater is fixedly connected with the automobile mixer and used for heating fuel oil in the automobile mixer; the electronic control unit is in communication connection with the urea pump and is used for controlling the injection pressure and the injection quantity of the urea pump. The utility model discloses a test bench of detection hydrocarbon injection system precision does not occupy engine bench resource, and the real simulation engine provides the actual operating mode of fuel for hydrocarbon injection system, is convenient for detect and revise hydrocarbon injection system's precision and injection uniformity; the test bed has simple structure and saves resources.
Description
Technical Field
The utility model relates to a diesel particle trapper technical field especially relates to a detect test bench of hydrocarbon injection system precision.
Background
With the increasing severity of air pollution and the increasingly strict attitude of our country to the emission requirements, the emission requirements in the next stage will become more stringent. Thus, increasingly stringent emissions requirements have brought the most stringent of challenges to both engine manufacturers and aftertreatment manufacturers. In order to meet the requirements of the next-stage emission and the most complex and challenging technological innovation, the diesel engine needs to not only improve the combustion technology with high efficiency, but also combine the application and intelligent control technology with high efficiency of aftertreatment and the intelligent control technology of vehicles. At present, the biggest difficulty for the Diesel Particulate Filter (DPF) technology is the accuracy problem of hydrocarbon injection quantity, and the low fuel injection quantity can cause the temperature not to rise to a required value, thereby causing regeneration failure; the fuel injection amount is large, so that the temperature rises beyond the range of the DPF, and in severe cases, the performance of the DPF is reduced, and even the DPF is burnt out. The consistency of the injection quantity control of the hydrocarbon injection system directly influences the regeneration temperature control, so that how to quickly and effectively measure and adjust the hydrocarbon injection precision is imperative. The existing hydrocarbon injection system design improvement in the industry can only meet the functional requirements, the defect that the injection consistency of the hydrocarbon injection system cannot be checked exists, the accuracy test through an engine rack relates to the limitation of rack cost, and the design improvement cannot be popularized and applied in the after-sale and maintenance of the actual hydrocarbon injection system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a test bench for detecting the precision of a hydrocarbon injection system, which does not occupy the resources of an engine bench, truly simulates the actual working condition that an engine provides fuel oil for the hydrocarbon injection system, and is convenient for detecting and correcting the precision and the injection consistency of the hydrocarbon injection system; the test bed has simple structure, convenient use and resource saving.
To achieve the purpose, the utility model adopts the following technical proposal:
a test rig for testing accuracy of a hydrocarbon injection system, comprising:
a urea pump connected to a hydrocarbon injection system through an injection pipe, the urea pump configured to provide heated, pressurized fuel to the hydrocarbon injection system;
an automobile mixer in communication with the urea pump, the automobile mixer having fuel disposed therein, the automobile mixer configured to provide heated fuel to the urea pump;
a heater fixedly connected with the automobile mixer, wherein the heater is configured to heat fuel in the automobile mixer; and
an electronic control unit communicatively coupled to the urea pump, the electronic control unit configured to control an injection pressure and an injection amount of the urea pump.
As a preferred structure of the present invention, the electronic control unit is connected to the heater in communication, and the electronic control unit is configured to control the switch and/or the heating temperature of the heater.
As the utility model discloses a preferred structure still includes into oil pipe, the both ends that advance oil pipe communicate respectively the auto mixer with the urea pump, advance oil pipe and be configured into the follow the auto mixer to the urea pump fuel delivery.
As the utility model discloses a preferred structure still includes back oil pipe, the both ends that return oil pipe communicate respectively the urea pump with the auto-mixer, it is configured as the follow to return oil pipe the urea pump to the auto-mixer carries unnecessary fuel.
As a preferred structure of the utility model, still include the thermometer, the thermometer communicate in the oil-out of urea pump, the thermometer is configured to measure the temperature that the urea pump sprays fuel.
As the utility model discloses a preferred structure still includes the manometer, the manometer communicate in the oil-out of urea pump, the manometer is configured to measure the urea pump sprays fuel pressure.
As the utility model discloses a preferred structure still includes the three-way valve, the both ends of three-way valve communicate respectively the urea pump with hydrocarbon injection system, the three-way valve is used for control whether the urea pump to hydrocarbon injection system sprays the fuel.
As an optimized structure of the utility model, the heater adopts an electric heating mode.
As an optimized structure of the utility model, the maximum heating temperature of the fuel in the automobile mixer is 75 ℃.
As an optimized structure of the utility model, the urea pump can provide the injection pressure of 5bar ~ 9 bar.
The utility model has the advantages that: the utility model provides a test bench of detection hydrocarbon injection system precision, including urea pump, auto mixer, heater and electronic control unit. The urea pump can provide heated and pressurized fuel oil for the hydrocarbon injection system; the automobile mixer provides heated fuel oil for the urea pump, and controls the injection pressure and the injection quantity of the urea pump and the fuel oil temperature in the automobile mixer through the electronic control unit; through the test bed, the engine bed resources can be not occupied, the actual working condition of the engine for providing fuel oil for the hydrocarbon injection system is truly simulated, and the accuracy and the injection consistency of the hydrocarbon injection system are convenient to detect and correct; the test bed has simple structure, is convenient for actual operation and saves resources.
Drawings
Fig. 1 is a schematic diagram of a test bench for detecting accuracy of a hydrocarbon injection system according to an embodiment of the present invention.
In the figure:
1. a urea pump; 11. an injection pipe; 2. an automotive mixer; 3. an electronic control unit; 4. a heater; 5. an oil inlet pipe; 6. an oil return pipe; 7. a thermometer; 8. a pressure gauge; 9. a three-way valve;
100. a hydrocarbon injection system; 200. and a post processor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
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.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in FIG. 1, the embodiment of the present invention provides a test bench for detecting accuracy of a hydrocarbon injection system, which comprises a urea pump 1, an automobile mixer 2, a heater 4 and an electronic control unit 3. The urea pump 1 is connected with the hydrocarbon injection system 100 through an injection pipe 11, and the urea pump 1 is configured to provide heated and pressurized fuel oil for the hydrocarbon injection system 100; the urea pump 1 is used as a pressure source of fuel oil and can provide injection pressure of 5 bar-9 bar according to the requirement of the hydrocarbon injection system 100. The automobile mixer 2 is communicated with the urea pump 1, fuel is arranged in the automobile mixer 2, and the automobile mixer 2 is configured to provide heated fuel to the urea pump 1. The heater 4 is fixedly connected to the automobile mixer 2, and the heater 4 is configured to heat fuel in the automobile mixer 2. The electronic control unit 3 is communicatively connected to the urea pump 1, and the electronic control unit 3 is configured to control the injection pressure and the injection amount of the urea pump 1. Preferably, a control harness may be used to connect the electronic control unit 3 and the urea pump 1. Through the test bed, the engine bed resources can be not occupied, the actual working condition that the engine provides fuel oil for the hydrocarbon injection system 100 is truly simulated, and the accuracy and the injection consistency of the hydrocarbon injection system 100 are convenient to detect and correct; the test bed has simple structure, is convenient for actual operation and saves resources.
Further, the heater 4 adopts an electric heating mode; the electronic control unit 3 is in communication connection with the heater 4, so that the switch of the heater 4 can be controlled, and the heating temperature can be set. When the heating temperature meets the injection requirement of the hydrocarbon injection system 100, the electronic control unit 3 will control the heater 4 to be turned off. Preferably, the maximum heating temperature of the fuel in the mixer 2 of the vehicle is 75 ℃, which is the same as the actual operating conditions of the engine.
Further, the test bench further comprises an oil inlet pipe 5 and an oil return pipe 6, two ends of the oil inlet pipe 5 are respectively communicated with the automobile mixer 2 and the urea pump 1, and the oil inlet pipe 5 is configured to convey fuel oil from the automobile mixer 2 to the urea pump 1; two ends of the oil return pipe 6 are respectively communicated with the urea pump 1 and the automobile mixer 2, and the oil return pipe 6 is configured to convey redundant fuel from the urea pump 1 to the automobile mixer 2.
Further, the test bench further comprises a temperature gauge 7 and a pressure gauge 8, the temperature gauge 7 is communicated with an oil outlet of the urea pump 1, and the temperature gauge 7 is configured to measure the temperature of fuel injected by the urea pump 1; the pressure gauge 8 is communicated with an oil outlet of the urea pump 1, and the pressure gauge 8 is configured to measure the pressure of the fuel injected by the urea pump 1. The pressure and the temperature of the fuel provided by the urea pump 1 are ensured to meet the injection requirements of the hydrocarbon injection system 100 through the temperature gauge 7 and the pressure gauge 8.
Further, the test bench further comprises a three-way valve 9, two ends of the three-way valve 9 are respectively communicated with the urea pump 1 and the hydrocarbon injection system 100, and the three-way valve 9 is used for controlling whether the urea pump 1 injects fuel to the hydrocarbon injection system 100. When the test bench of the embodiment is used, when the temperature and the pressure of the fuel provided by the urea pump 1 meet the injection requirements of the hydrocarbon injection system 100, the three-way valve 9 is opened to control the urea pump 1 to provide the fuel output for the hydrocarbon injection system 100.
The hydrocarbon injection system 100 injects fuel in the exhaust pipe through a hydrocarbon injection nozzle, and the fuel is combusted under the catalytic oxidation action to generate heat, thereby performing a good regeneration action on the DPF. The specific operation steps for performing the accuracy check of the hydrocarbon injection system 100 using the test stand of the present embodiment are as follows:
1. determining a temperature value required by a fuel supply end in the hydrocarbon injection system 100, and using the heater 4 as an input of the fuel temperature end; 2. determining a pressure value required by a fuel supply end in the hydrocarbon injection system 100, and using the urea pump 1 as a fuel pressure end input; 3. determining a hydrocarbon injection request demand amount of the hydrocarbon injection system 100; 4. determining reasonable temperature ranges and pressure boundaries of the three-way valve 9 and the metering valve of the hydrocarbon injection system 100; 5. hydrocarbon injection system 100 injects fuel into aftertreatment processor 200; 6. the method is characterized in that a weighing method is adopted to analyze the differential pressure hysteresis limiting value of the hydrocarbon injection system 100, the electronic control unit 3 controls the injection quantity value and the actual injection quantity value of the fuel oil according to the open loop of a fuel oil metering valve of the hydrocarbon injection system 100, and the threshold value of the set error is compared.
In the above operation, before step 5, it is required to ensure that the urea pump 1 is pressurized, after the pilot injection of the nozzle of the hydrocarbon injection system 100, the nozzle is closed, and then the three-way valve 9 is opened to provide fuel output for the hydrocarbon nozzle of the hydrocarbon injection system 100.
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. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. 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 (10)
1. A test rig for testing accuracy of a hydrocarbon injection system, comprising:
a urea pump (1), wherein the urea pump (1) is connected with a hydrocarbon injection system (100) through an injection pipe (11), and the urea pump (1) is configured to provide heated and pressurized fuel oil for the hydrocarbon injection system (100);
the automobile mixer (2), the automobile mixer (2) is communicated with the urea pump (1), fuel is arranged in the automobile mixer (2), and the automobile mixer (2) is configured to provide heated fuel to the urea pump (1);
a heater (4), wherein the heater (4) is fixedly connected with the automobile mixer (2), and the heater (4) is configured to heat fuel in the automobile mixer (2); and
an electronic control unit (3), the electronic control unit (3) being communicatively connected to the urea pump (1), the electronic control unit (3) being configured to control the injection pressure and the injection amount of the urea pump (1).
2. Test bench for testing the accuracy of a hydrocarbon injection system according to claim 1, characterized in that the electronic control unit (3) is communicatively connected to the heater (4), the electronic control unit (3) being configured to control the switching and/or heating temperature of the heater (4).
3. The test bench for detecting the accuracy of the hydrocarbon injection system according to claim 1, further comprising an oil inlet pipe (5), wherein two ends of the oil inlet pipe (5) are respectively communicated with the automobile mixer (2) and the urea pump (1), and the oil inlet pipe (5) is configured to deliver fuel from the automobile mixer (2) to the urea pump (1).
4. The test bench for detecting the accuracy of the hydrocarbon injection system according to claim 1, further comprising an oil return pipe (6), wherein two ends of the oil return pipe (6) are respectively communicated with the urea pump (1) and the automobile mixer (2), and the oil return pipe (6) is configured to convey excessive fuel from the urea pump (1) to the automobile mixer (2).
5. Test bench for testing the accuracy of a hydrocarbon injection system according to claim 1, characterized in that it further comprises a thermometer (7), said thermometer (7) being in communication with the outlet of said urea pump (1), said thermometer (7) being configured to measure the temperature of the fuel injected by said urea pump (1).
6. Test bench for detecting accuracy of hydrocarbon injection system according to claim 1, further comprising a pressure gauge (8), said pressure gauge (8) being in communication with an oil outlet of said urea pump (1), said pressure gauge (8) being configured to measure pressure of fuel injected by said urea pump (1).
7. The test bench for detecting the accuracy of the hydrocarbon injection system according to claim 1, further comprising a three-way valve (9), wherein two ends of the three-way valve (9) are respectively communicated with the urea pump (1) and the hydrocarbon injection system (100), and the three-way valve (9) is used for controlling whether the urea pump (1) injects fuel to the hydrocarbon injection system (100).
8. Test bench for testing the accuracy of hydrocarbon injection systems according to any of claims 1-7, characterised in that the heater (4) is electrically heated.
9. Test bench for testing the accuracy of hydrocarbon injection systems according to any of claims 1-7, characterised in that the maximum heating temperature of the fuel in the motor vehicle mixer (2) is 75 ℃.
10. Test bench for testing the accuracy of hydrocarbon injection systems according to any of claims 1-7, characterised in that the urea pump (1) is capable of providing injection pressures of between 5 and 9 bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120715192.XU CN214698010U (en) | 2021-04-08 | 2021-04-08 | Test bench for detecting accuracy of hydrocarbon injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120715192.XU CN214698010U (en) | 2021-04-08 | 2021-04-08 | Test bench for detecting accuracy of hydrocarbon injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214698010U true CN214698010U (en) | 2021-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120715192.XU Active CN214698010U (en) | 2021-04-08 | 2021-04-08 | Test bench for detecting accuracy of hydrocarbon injection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214698010U (en) |
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2021
- 2021-04-08 CN CN202120715192.XU patent/CN214698010U/en active Active
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