CN208474026U - A kind of six diesel engine intake metering system of state - Google Patents
A kind of six diesel engine intake metering system of state Download PDFInfo
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- CN208474026U CN208474026U CN201820928757.0U CN201820928757U CN208474026U CN 208474026 U CN208474026 U CN 208474026U CN 201820928757 U CN201820928757 U CN 201820928757U CN 208474026 U CN208474026 U CN 208474026U
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Abstract
The utility model discloses a kind of six diesel engine intake metering systems of state, including Venturi tube, and the sensor structure being arranged in Venturi tube；Venturi tube successively includes contraction section, mixing section and diffuser；Contraction section includes entrance, and the trunnion section being connected on entrance；Mixing section includes measurement pipeline section connect with trunnion section and for placing sensor structure；Diffuser includes the diffusion pipeline section being connected on measurement pipeline section；Sensor structure includes skeleton, the circuit board being connected on skeleton, it is connected at the top of skeleton the and prominent harness connector plug in measurement pipe section exterior, be arranged on skeleton for measurement segment seal O-ring seal, and connection on circuit boards and be arranged in measurement inner tube segment temperature sensor and pressure sensor；It is connected between circuit board and harness connector plug by conducting wire；The precise measurement of air inlet amount is realized, so that accurately, effectively control burning, achievees the purpose that reduce discharging pollutants.
Description
Technical field
The utility model relates to diesel engine air inlet system metering unit technical fields, in particular to a kind of six bavin of state
Oil machine air inlet metering system.
Background technique
With the increasingly upgrading of emission regulation comprehensively, it is contemplated that the year two thousand twenty China can carry out six emission regulation demands of state；Start
Machine requires to add than five stage emission indices of state tight a lot in six stage emission of state: nitrogen oxide NOx, particulate matter PM, total carbon
Hydrogen compound THC, ammonia NH3 index reduce 50-80%, and steady-cycle in stable state test becomes WHSC (the unified steady state test in the whole world from ESC
Circulation), transient-cycle in point state test is changed to WHTC (the unified transient-cycle in point state test in the whole world) by ETC, increases WNTE (engine pedestal
Non-standard circulation) it tests and PN (particle number) requirement；Vehicle increases PEMS (portable discharge measuring system) test.Therefore to hair
The requirement of motivation is also higher and higher, especially to the requirement of combustion system；It is well known that the fuel burning of engine must more fill
Point, PM (particulate matter) discharges pollutants fewer, air excess factor appropriate (the air matter that burning 1kg fuel is actually supplied
Theoretical air quality needed for amount/completely burned 1kg fuel) it can effectively reduce various discharge pollutants；Therefore engine is being transported
During turning, the accuracy of air inlet measurement, which directly affects, to discharge pollutants；Previous state five discharges pervious engine and adopts
It controls air inflow parameter roughly with admission pressure, and then adjusts distributive value and reach emission request, this measurement and control mode
It is inaccurate.
Summary of the invention
The utility model aim is to provide a kind of metering system for capableing of precise measurement diesel engine air air inflow, solves
The above technical problem.
In order to achieve the above technical purposes, reach above-mentioned technical requirements, the technical scheme adopted by the utility model is
A kind of six diesel engine intake metering system of state, including Venturi tube, and the sensor structure being arranged in Venturi tube；It is described
Venturi tube successively include contraction section, mixing section and diffuser；It is characterized in that: the Venturi tube and sensor structure it
Between be vertically arranged；The contraction section includes entrance, and the trunnion section being connected on entrance；The mixing section includes
Measurement pipeline section being connect with trunnion section and for placing sensor structure；The diffuser includes being connected to measurement pipe
Diffusion pipeline section in section；The sensor structure includes skeleton, and the circuit board being connected on skeleton is connected at the top of skeleton
And the O-ring seal being used for measurement segment seal on skeleton is arranged in the prominent harness connector plug in measurement pipe section exterior,
And connection on circuit boards and be arranged in measurement inner tube segment temperature sensor and pressure sensor；The circuit
It is connected between plate and harness connector plug by conducting wire.
As a preferred technical scheme: being additionally provided in the Venturi tube for sensor structure to be bolted
Protrusion pipe；It is vertically arranged between the protrusion pipe and Venturi tube.
As a preferred technical scheme: the entrance, trunnion section, measurement pipeline section and spreading the center line of pipeline section same
On one straight line.
As a preferred technical scheme: the entrance is straight tube structure, and diameter A is equal to diffusion pipeline section exit
Diameter B.
As a preferred technical scheme: the cross section of the trunnion section forms corrugated structure, diameter by with entrance
Interface to gradually become smaller at measurement pipe segment interface.
As a preferred technical scheme: the measurement pipeline section is straight tube structure, and diameter C is less than diameter A or diameter
B。
As a preferred technical scheme: the diffusion pipeline section be bell-mouth structure of air, diameter by with measurement pipe segment interface
Place becomes larger to exit.
The beneficial effects of the utility model are: a kind of six diesel engine intake metering system of state, is provided with entrance, trunnion
Section, measurement pipeline section and diffusion pipeline section, form venturi tube structure；Sensor structure, sensor knot are additionally provided at measurement pipeline section
Temperature sensor and pressure sensor are provided on structure, the pressure and temperature signal measured is then passed to engine electric-controlled
Unit；The precise measurement of air inlet amount is realized, so that accurately, effectively control burning, reaches the mesh for reducing and discharging pollutants
's.
Detailed description of the invention
Fig. 1 is the utility model three dimensional structure diagram；
Fig. 2 is the utility model Venturi tube and protrusion pipe cross-sectional view；
Fig. 3 is the top view of the utility model Fig. 2；
Fig. 4 is the utility model sensor structure schematic diagram；
Respective name represented by number in figure: 1. Venturi tubes, 2. sensor structures, 3. entrances, 4. trunnion sections, 5.
Measure pipeline section, 6. diffusion pipeline sections, 7. skeletons, 8. circuit boards, 9. harness connector plugs, 10.O type sealing ring, 11. temperature sensors, 12.
Pressure sensor, 13. protrusion pipes.
Specific embodiment
The utility model is further described with reference to the accompanying drawing；
In Fig. 1, Fig. 2, Fig. 3, Fig. 4: first embodiment:
A kind of six diesel engine intake metering system of state, including Venturi tube 1, and the sensing being arranged in Venturi tube 1
Device structure 2；The Venturi tube 1 successively includes contraction section, mixing section and diffuser；The Venturi tube 1 and sensor
It is vertically arranged between structure 2；The contraction section includes entrance 3, and the trunnion section 4 being connected on entrance 3；Described
Mixing section includes measurement pipeline section 5 connect with trunnion section 4 and for placing sensor structure 2；The diffuser includes
The diffusion pipeline section 6 being connected on measurement pipeline section 5；Entrance 3, trunnion section 4, measurement pipeline section 5 and the center for spreading pipeline section 6
Line is on the same line；The entrance 3 is straight tube structure, and diameter A is equal to the diameter B in diffusion 6 exit of pipeline section；It is described
Trunnion section 4 cross section formed corrugated structure, diameter from 3 interface of entrance to measurement 5 interface of pipeline section gradually
Become smaller；The measurement pipeline section 5 is straight tube structure, and diameter C is less than diameter A or diameter B；The diffusion pipeline section 6 is loudspeaker
Mouth structure, diameter with measurement 5 interface of pipeline section to exit from becoming larger；The sensor structure 2 includes skeleton
7, the circuit board 8 being connected on skeleton 7 is connected at the top of skeleton 7 the and prominent harness connector plug 9 outside measurement pipeline section 5,
Be arranged on skeleton 7 be used for and measurement pipeline section 5 seal O-ring seal 10, and be connected on circuit board 8 and be arranged
Temperature sensor 11 and pressure sensor 12 inside measurement pipeline section 5；Pass through between the circuit board 8 and harness connector plug 9
Conducting wire connection；In actual use, the center line of the entrance 3, trunnion section 4, measurement pipeline section 5 and diffusion pipeline section 6 is same
On one straight line, and by entrance 3, trunnion section 4, measurement pipeline section 5 and spreading the control of diameter, shape of pipeline section 6 and being formed
Venturi tube 1 structure, so that the flow velocity of air formation temperature at measurement pipeline section 5, without the feelings of vortex and boundary layer separation
Condition advantageously ensures that the measurement accuracy of sensor structure 2；Temperature sensor 11 and pressure sensing are provided on sensor structure 2
Device 12, the pressure and temperature signal measured pass to engine electric-controlled unit (ECU)；Engine electric-controlled unit (ECU) can
The air inlet amount into engine is precisely calculated, accurate oil spout can be calculated according to the size of air inlet amount
Amount, can make engine be accurately controlled burning, to achieve the purpose that reduce pollutant emission；
In Fig. 1, Fig. 2, Fig. 3: being additionally provided in the Venturi tube 1 for sensor structure 2 to be bolted
Protrusion pipe 13；It is vertically arranged between the protrusion pipe 13 and Venturi tube 1；Convenient for 2 installing and dismounting of sensor structure.
The specific implementation of the utility model: the calculation formula of engine electric-controlled unit (ECU) in the prior art, according to primary
Exert sharp equation, The Ideal-Gas Equation and the law of indestructibility of matter；Obtain the calculation formula of air inlet amount；
One, Bernoulli equation:
Wherein: Δ P is pressure difference, and Ps is reference pressure, and Ptot is total gas pressure, and ν is gas flow rate；
Two, according to The Ideal-Gas Equation:
Wherein: ρ is atmospheric density, and T is aerothermodynami temperature, and Rs is ideal gas constant；
Three, according to mass conservation law:
M=ρ * ν * Aeff；
Wherein: m is air quality, and Aeff is the effective sectional area that air flows through；
The air inlet amount calculation formula into engine can be derived according to above formula:
By temperature sensor 11 and pressure sensor 12, the pressure and temperature measured
Signal is spent, passes to and is calculated in engine electric-controlled unit (ECU).
In the utility model description, it is to be understood that term " top ", " between ", " outside ", " inside " etc. indicates
Orientation or positional relationship is to be merely for convenience of description the utility model based on positional relationship described in attached drawing or simplified description,
Rather than the specific orientation that instruction must have.
Above-described embodiment is only intended to clearly illustrate description made by the utility model, and not to the limit of embodiment
It is fixed, to those of ordinary skill in the art, other various forms of variations can also be made on the basis of the above description
Or change, there is no necessity and possibility to exhaust all the enbodiments, and the obvious variation thus amplified out
Or it changes among still in the protection scope of the utility model.
Claims (7)
1. a kind of six diesel engine intake metering system of state, including Venturi tube (1), and the biography being arranged on Venturi tube (1)
Sensor structure (2)；The Venturi tube (1) successively includes contraction section, mixing section and diffuser；It is characterized in that: the text
It is vertically arranged between venturi (1) and sensor structure (2)；The contraction section includes entrance (3), and is connected to entrance
Trunnion section (4) in section (3)；The mixing section connect with trunnion section (4) and is used to place sensor structure
(2) measurement pipeline section (5)；The diffuser includes the diffusion pipeline section (6) being connected in measurement pipeline section (5)；The sensing
Device structure (2) includes skeleton (7), the circuit board (8) being connected on skeleton (7), is connected at the top of skeleton (7) and protrudes
Pipeline section (5) external harness connector plug (9) is measured, what is be arranged on skeleton (7) is used for the O-shaped sealing with measurement pipeline section (5) sealing
It encloses (10), and temperature sensor (11) and pressure being connected on circuit board (8) and being arranged inside measurement pipeline section (5)
Sensor (12)；It is connect between the circuit board (8) and harness connector plug (9) by conducting wire.
2. six diesel engine intake metering system of a kind of state according to claim 1, it is characterized in that: the Venturi tube
(1) the protrusion pipe (13) for sensor structure (2) to be bolted is additionally provided on；The protrusion pipe (13) and literary mound
In manage (1) between be vertically arranged.
3. six diesel engine intake metering system of a kind of state according to claim 1, it is characterized in that: the entrance (3),
The center line of trunnion section (4), measurement pipeline section (5) and diffusion pipeline section (6) is on the same line.
4. six diesel engine intake metering system of a kind of state according to claim 1, it is characterized in that: the entrance (3)
For straight tube structure, diameter A is equal to the diameter B in diffusion pipeline section (6) exit.
5. six diesel engine intake metering system of a kind of state according to claim 1, it is characterized in that: the trunnion section (4)
Cross section formed corrugated structure, diameter from entrance (3) interface to measurement pipeline section (5) interface gradually become smaller.
6. six diesel engine intake metering system of a kind of state according to claim 4, it is characterized in that: the measurement pipeline section
It (5) is straight tube structure, diameter C is less than diameter A or diameter B.
7. six diesel engine intake metering system of a kind of state according to claim 4, it is characterized in that: the diffusion pipeline section
It (6) is bell-mouth structure of air, diameter with measurement pipeline section (5) interface to exit from becoming larger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820928757.0U CN208474026U (en) | 2018-06-15 | 2018-06-15 | A kind of six diesel engine intake metering system of state |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820928757.0U CN208474026U (en) | 2018-06-15 | 2018-06-15 | A kind of six diesel engine intake metering system of state |
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| CN208474026U true CN208474026U (en) | 2019-02-05 |
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| CN201820928757.0U Active CN208474026U (en) | 2018-06-15 | 2018-06-15 | A kind of six diesel engine intake metering system of state |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389037A (en) * | 2019-07-23 | 2019-10-29 | 哈尔滨工程大学 | A kind of diesel engine intake system for measuring quantity |
| WO2021098023A1 (en) * | 2019-11-22 | 2021-05-27 | 潍柴动力股份有限公司 | Gas mixing apparatus and natural gas engine |
| CN114458484A (en) * | 2022-01-29 | 2022-05-10 | 东风商用车有限公司 | Engine venturi tube |
-
2018
- 2018-06-15 CN CN201820928757.0U patent/CN208474026U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389037A (en) * | 2019-07-23 | 2019-10-29 | 哈尔滨工程大学 | A kind of diesel engine intake system for measuring quantity |
| WO2021098023A1 (en) * | 2019-11-22 | 2021-05-27 | 潍柴动力股份有限公司 | Gas mixing apparatus and natural gas engine |
| CN114458484A (en) * | 2022-01-29 | 2022-05-10 | 东风商用车有限公司 | Engine venturi tube |
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