CN108317032A - A kind of experimental rig and method measuring natural gas engine gas emitted dose - Google Patents
A kind of experimental rig and method measuring natural gas engine gas emitted dose Download PDFInfo
- Publication number
- CN108317032A CN108317032A CN201810057267.2A CN201810057267A CN108317032A CN 108317032 A CN108317032 A CN 108317032A CN 201810057267 A CN201810057267 A CN 201810057267A CN 108317032 A CN108317032 A CN 108317032A
- Authority
- CN
- China
- Prior art keywords
- gas
- constant volume
- injection valve
- valve
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/001—Measuring fuel delivery of a fuel injector
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of experimental rigs and method measuring natural gas engine gas emitted dose, belong to technical field of engines, including gas cylinder, Voltage stabilizing module, control module, measurement module and message processing module, gas is exported from gas cylinder, it is input in the fuel gas injection valve in control module after Voltage stabilizing module carries out voltage stabilizing, injection valve actuator in control module controls to adjust the injection cycle and jet pulsewidth of fuel gas injection valve, gas enters measurement module later, measurement module includes two kinds of measurement modules of constant volume and mass flow, second Air Valve Control gas of two intermodules installation is in two mould circulations in the block, to realize the measurement using two methods to fuel gas injection amount, message processing module is for collecting signal and is handled.The present invention realizes the fuel gas injection amount for measuring natural gas engine using two sets of measurement methods in same system, and can be compared two kinds of measurement results, improves measurement accuracy, reduces measurement error.
Description
Technical field
The invention belongs to technical field of engines, and in particular to a kind of experiment measuring natural gas engine gas emitted dose
Device and method.
Background technology
With the scarcity of the energy and the deterioration of environment, exploitation is very urgent using energy-saving clean fuel.In all multi fuels
In, natural gas resource is abundant, and discharge is friendly, is paid much attention to recently and is applied.Natural gas is a kind of gaseous state fossil fuel,
It is made of different types of gas, main component is methane.Compared with traditional petroleum based fuels oil and gasoline, natural gas
With higher low heat value, fuel to air equivalence is relatively low.Hydrocarbon and oxynitride discharge after combustion of natural gas is less,
The soot of generation is lower, and not will produce the harmful substances such as lead, benzene.So as ideal automotive fuel, natural gas is answered
With more and more extensive.
In natural gas engine, in-cylinder direct-jet technology can effectively improve intake efficiency, supply stability of characteristics, and improvement is started
Mechanomotive force, economy and emission performance, therefore in-cylinder direct-jet technology is gradually taken seriously.In the combustion gas using high pressure direct injection
In system, emitted dose affects combustion characteristics, and has important influence to the exploitation of engine control system.Grasp it is practical into
Fuel gas injection process in air flue is conducive to the utilization and development of direct injection technology, to further solve natural gas engine acc power
Insufficient problem, improves the fuel economy of engine.
Currently, extensive measuring technique or device are used for measuring the injection spy such as fuel gas injection amount there has been no very ripe
Property.Studies in China shows that the method for measuring fuel gas injection valve jet characteristic mainly has drainage, mass flowmenter method, weight method
With constant volume area method etc., and it is the measurement for single jet amount and steady state flow.
The water that the principle of drainage is discharged when being according to jet nozzle obtains the volume of jet after conversion.Usual feelings
Total amount is weighed after needing continuous several times to spray under condition, finally calculates average value.The error measured using drainage is smaller, but is only capable of
Measure the jet total amount of single.
Mass flowmenter method refers to the installation quality flowmeter at injection apparatus, after jetting stability, is measured with flowmeter,
Computer disposal goes out result.The precision that mass flowmenter method measures is higher, can be used for testing injection valve steady state flow.
Weight method is only applicable to engine bench test, and precision is relatively low, is not easy to control error.
It is to survey fuel injection characteristic from pressure application to develop, and precision is higher that constant volume area method, which surveys fuel gas injection amount,.Specific behaviour
As：Into the gas chamber of fixed volume with certain pressure injection gas, pressure, temperature change can occur in gas chamber, in conjunction with gas
After the formula such as body state equation are derived, so that it may to calculate emitted dose.
In conclusion the spray characteristic for grasping fuel gas injection amount is conducive to the development of direct injection technology in engine cylinder, to
Promote the application of natural gas engine technology, reduce discharge environmental protection, therefore, a kind of natural gas engine that is suitable for of invention fires
The measuring device of gas jet amount is necessary.
Invention content
It is measured the purpose of the present invention is to provide a kind of achievable engine gas jet law and can be in set of system
The experimental rig of the measurement natural gas engine gas emitted dose of constant volume area method and mass flowmenter method is used simultaneously and uses this
The method that kind device carries out natural gas engine gas injection measurement.
The object of the present invention is achieved like this：
The invention discloses a kind of experimental rigs measuring natural gas engine gas emitted dose, including gas cylinder 1, voltage stabilizing mould
Block, control module, measurement module and message processing module；
Voltage stabilizing module includes pressure reducing valve 2, first pipe 3, the first air valve 4 and voltage stabilizing gas chamber 5, and first pipe 3 connects gas cylinder 1
With voltage stabilizing gas chamber 5, pressure reducing valve 2 and the first air valve 4 are mounted in first pipe 3, and pressure reducing valve 2 is installed on gas cylinder 1 and the first air valve 4
Between；
Control module includes fuel gas injection valve 6, injection valve base 7, jet pipe 8 and injection valve actuator 15, fuel gas injection valve 6
It is bolted on injection valve base 7, is connected respectively with voltage stabilizing gas chamber 5 and injection valve actuator 15, jet pipe 8 is from combustion gas
It is stretched out after injection valve 6；
Measurement module includes constant volume measurement module and mass flow measurement module, and constant volume measurement module includes constant volume again
Gas chamber 9, pressure sensor 10, temperature sensor 11 and the second air valve 12, mass flow module include second pipe 13 and matter again
Flowmeter 14 is measured, pressure sensor 10 and temperature sensor 11, one end and the jet pipe 8 of constant volume gas chamber 9 are installed on constant volume gas chamber 9
It is connected, the other end is connected with second pipe 13, and the second air valve 12 is equipped on second pipe 13；
Message processing module includes data collecting card 16 and computer 17, and 16 one end of data collecting card is connected with pressure sensing
Device 10 and temperature sensor 11, the other end are connected on computer 17, and computer 17 is also connected with injection valve actuator 15.
Preferably, near the pressure reducing valve 2 is mounted at the gas outlet of gas cylinder 1.
Preferably, 8 sectional area of jet pipe is more than 6 outlet stream sectional area of fuel gas injection valve.
Preferably, the size of the constant volume gas chamber 9 can flexible modulation, can be according to the fuel gas injection valve 6 used
Size calculates.
Preferably, the pressure sensor 10, temperature sensor 11 are installed on the same side of constant volume gas chamber 9 with jet pipe 8.
Preferably, the injection valve actuator 15 includes control unit, the injection cycle of adjusting control fuel gas injection valve 6
And injection pulse width.
The invention also discloses a kind of methods measuring natural gas engine gas emitted dose, including constant volume area method and quality
Flowmeter method, constant volume area method realize that mass flowmenter method is realized by mass flow measurement module by constant volume measurement module,
Constant volume area method can be achieved by the control of the second air valve of two intermodules and the priority of mass flowmenter method measures, it is specific real
Existing mode is realized by following steps：
(1) gas exports from gas cylinder and enters first pipe, and voltage stabilizing is flowed into after pressure reducing valve decompression and the first air valve
Gas chamber carries out voltage stabilizing；
(2) gas after voltage stabilizing gas chamber voltage stabilizing enters fuel gas injection valve by pipeline, and injection valve actuator is to gas injection
The injection cycle and jet pulsewidth for penetrating valve are controlled to adjust, to spray gas into constant volume gas chamber with certain pressure；
(3) the second air valve is closed, fuel gas injection amount, pressure sensor and temperature sensor monitors are measured using constant volume area method
The indoor pressure, temperature variation of constant volume gas, data collecting card collect pressure sensor and the signal of temperature sensor monitors, and
Computer is transferred signals to be handled；
(4) the second air valve is opened, fuel gas injection amount is measured using mass flowmenter method, gas flows into matter after constant volume gas chamber
Flowmeter is measured, mass flowmenter carries out injection measurement to the combustion gas flowed through.
The beneficial effects of the present invention are：This experiment for measuring natural gas engine gas emitted dose disclosed by the invention
Device, including constant volume measurement module and mass flow meter measurement module, the stream of the second Air Valve Control gas between two modules
It is dynamic, to realize the fuel gas injection amount for measuring natural gas engine using two sets of measurement methods in same system, and can
Two kinds of measurement results are compared, measurement accuracy is improved, reduces measurement error.
Description of the drawings
Fig. 1 is the structural schematic diagram of natural gas engine gas rule experimental rig in the present invention.
Specific implementation mode
The present invention is described further below in conjunction with the accompanying drawings.
In conjunction with Fig. 1, the invention discloses a kind of experimental rigs measuring natural gas engine gas emitted dose, including gas cylinder
1, Voltage stabilizing module, control module, measurement module and message processing module；Voltage stabilizing module includes pressure reducing valve 2, first pipe 3, first
Air valve 4 and voltage stabilizing gas chamber 5；Control module includes fuel gas injection valve 6, injection valve base 7, jet pipe 8 and injection valve actuator 15；It surveys
Amount module includes constant volume measurement module and mass flow measurement module, and constant volume measurement module includes constant volume gas chamber 9, pressure again
Sensor 10, temperature sensor 11 and the second air valve 12, mass flow module include second pipe 13 and mass flowmenter 14 again；
Message processing module includes data collecting card 16 and computer 17.
First pipe 3 connects gas cylinder 1 and voltage stabilizing gas chamber 5, and pressure reducing valve 2 and the first air valve 4 are mounted in first pipe 3, subtract
Pressure valve 2 is between the first air valve 4 and gas cylinder 1.The gas pressure that 2 controllable adjustable of pressure reducing valve comes out from gas cylinder 1, the first air valve
The transmission of 4 controllable gases.The gas flowed out from voltage stabilizing gas chamber 5 flows into fuel gas injection valve 6, is controlled by injection valve actuator 12
The injection cycle and jet pulsewidth of regulating gas injection valve 6.Fuel gas injection valve 6 is fixed on injection valve base 7, and connection type is
It is bolted.Jet pipe 8 is after the stretching of fuel gas injection valve 6, into constant volume gas chamber 9.Pressure sensor 10, temperature sensor 11 and spray
Pipe 8 is located at the same side of constant volume gas chamber 9, can be directly impinging pressure sensor to avoid jet-stream wind, to influence to measure effect
Fruit.After data collecting card 16 collects the signal of temperature sensor 11 and pressure sensor 10, the processing of computer 17 is given.Second gas
When valve 12 is opened, the gas flowed out from constant volume gas chamber 9 flows into mass flowmenter 14 after second pipe 13.
The invention also discloses a kind of methods measuring natural gas engine gas emitted dose, including constant volume area method and quality
Flowmeter method, constant volume area method realize that mass flowmenter method is realized by mass flow measurement module by constant volume measurement module,
Constant volume area method can be achieved by the control of the second air valve of two intermodules and the priority of mass flowmenter method measures, it is specific real
Existing mode is realized by following steps：
(1) gas exports from gas cylinder and enters first pipe, and voltage stabilizing is flowed into after pressure reducing valve decompression and the first air valve
Gas chamber carries out voltage stabilizing；
(2) gas after voltage stabilizing gas chamber voltage stabilizing enters fuel gas injection valve by pipeline, and injection valve actuator is to gas injection
The injection cycle and jet pulsewidth for penetrating valve are controlled to adjust, to spray gas into constant volume gas chamber with certain pressure；
(3) the second air valve is closed, fuel gas injection amount, pressure sensor and temperature sensor monitors are measured using constant volume area method
The indoor pressure, temperature variation of constant volume gas, data collecting card collect pressure sensor and the signal of temperature sensor monitors, and
Computer is transferred signals to be handled；
(4) the second air valve is opened, fuel gas injection amount is measured using mass flowmenter method, gas flows into matter after constant volume gas chamber
Flowmeter is measured, mass flowmenter carries out injection measurement to the combustion gas flowed through.
Wherein, when measuring fuel gas injection amount using constant volume area method, the second air valve 12 is closed, to constant volume gas chamber 9 with certain
Pressure injection gas, in conjunction with the equation of gas stateDerive and calculates jet amount.It is measured using mass flowmenter method
When fuel gas injection amount, the second air valve 12 is opened, allows gas after gas cylinder outflow, after constant volume gas chamber, flows into mass flowmenter
It is interior.
In view of high-power engine fuel gas injection valve is there may be leakage phenomenon, when calculating, needs test period internal combustion
The gas leakage quality of gas jet valve dwell period is removed,Wherein Δ m sprays for injection valve
Penetrate primary jet quality, P1For the pressure before jet in constant volume gas chamber 9, P2It is finished for gas injection and container inner pressure reaches
Pressure when stablizing, f are test period, and L is injection valve leak rate, and a is the jet duration.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of experimental rig measuring natural gas engine gas emitted dose, it is characterised in that：Including gas cylinder (1), voltage stabilizing mould
Block, control module, measurement module and message processing module；
Voltage stabilizing module includes pressure reducing valve (2), first pipe (3), the first air valve (4) and voltage stabilizing gas chamber (5), and first pipe (3) is even
Gas cylinder (1) and voltage stabilizing gas chamber (5) are connect, pressure reducing valve (2) is mounted on the first air valve (4) in first pipe (3), pressure reducing valve (2) peace
Loaded between gas cylinder (1) and the first air valve (4)；
Control module includes fuel gas injection valve (6), injection valve base (7), jet pipe (8) and injection valve actuator (15), gas injection
It penetrates valve (6) to be bolted on injection valve base (7), be connected respectively with voltage stabilizing gas chamber (5) and injection valve actuator (15)
It connects, jet pipe (8) stretches out afterwards from fuel gas injection valve (6)；
Measurement module includes constant volume measurement module and mass flow measurement module, and constant volume measurement module includes constant volume gas chamber again
(9), pressure sensor (10), temperature sensor (11) and the second air valve (12), mass flow module include second pipe again
(13) and mass flowmenter (14) pressure sensor (10) and temperature sensor (11), constant volume gas, are installed on constant volume gas chamber (9)
One end of room (9) is connected with jet pipe (8), and the other end is connected with second pipe (13), and second pipe is equipped with second on (13)
Air valve (12)；
Message processing module includes data collecting card (16) and computer (17), and data collecting card (16) one end is connected with pressure biography
Sensor (10) and temperature sensor (11), the other end are connected on computer (17), computer (17) also with injection valve actuator
(15) it is connected.
2. a kind of experimental rig measuring natural gas engine gas emitted dose according to claim 1, it is characterised in that：
Near the pressure reducing valve (2) is mounted at the gas outlet of gas cylinder (1).
3. a kind of experimental rig measuring natural gas engine gas emitted dose according to claim 1, it is characterised in that：
Described jet pipe (8) sectional area is more than fuel gas injection valve (6) outlet stream sectional area.
4. a kind of experimental rig measuring natural gas engine gas emitted dose according to claim 1, it is characterised in that：
The size of the constant volume gas chamber (9) can flexible modulation, can be calculated according to the size of the fuel gas injection valve (6) used.
5. a kind of experimental rig measuring natural gas engine gas emitted dose according to claim 1, it is characterised in that：
Pressure sensor (10), temperature sensor (11) and the jet pipe (8) is installed on the same side of constant volume gas chamber (9).
6. a kind of experimental rig measuring natural gas engine gas emitted dose according to claim 1, it is characterised in that：
The injection valve actuator (15) includes control unit, the injection cycle and injection pulse width of adjusting control fuel gas injection valve (6).
7. a kind of method measuring natural gas engine gas emitted dose, which is characterized in that including constant volume area method and mass flow
Meter method, constant volume area method realize that mass flowmenter method is realized by mass flow measurement module, is passed through by constant volume measurement module
Constant volume area method can be achieved for the control of second air valve of two intermodules and the priority of mass flowmenter method measures, concrete implementation side
Formula is realized by following steps：
(1) gas exports from gas cylinder and enters first pipe, and voltage stabilizing gas chamber is flowed into after pressure reducing valve decompression and the first air valve
Carry out voltage stabilizing；
(2) gas after voltage stabilizing gas chamber voltage stabilizing enters fuel gas injection valve by pipeline, and injection valve actuator is to fuel gas injection valve
Injection cycle and jet pulsewidth controlled to adjust, to certain pressure spray gas into constant volume gas chamber；
(3) the second air valve is closed, fuel gas injection amount, pressure sensor and temperature sensor monitors constant volume are measured using constant volume area method
The indoor pressure, temperature variation of gas, data collecting card collect pressure sensor and the signal of temperature sensor monitors, and will letter
Number being transferred to computer is handled；
(4) the second air valve is opened, fuel gas injection amount is measured using mass flowmenter method, gas flows into quality stream after constant volume gas chamber
Gauge, mass flowmenter carry out injection measurement to the combustion gas flowed through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810057267.2A CN108317032A (en) | 2018-01-22 | 2018-01-22 | A kind of experimental rig and method measuring natural gas engine gas emitted dose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810057267.2A CN108317032A (en) | 2018-01-22 | 2018-01-22 | A kind of experimental rig and method measuring natural gas engine gas emitted dose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108317032A true CN108317032A (en) | 2018-07-24 |
Family
ID=62886793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810057267.2A Pending CN108317032A (en) | 2018-01-22 | 2018-01-22 | A kind of experimental rig and method measuring natural gas engine gas emitted dose |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108317032A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000918A (en) * | 2018-09-21 | 2018-12-14 | 中国船舶重工集团公司第七研究所 | Gas engine electric-controlled gas sprays valve test device and its test method |
| CN109946059A (en) * | 2019-04-17 | 2019-06-28 | 中国人民解放军第八一医院 | A kind of ultra-thin fluid jet nozzle performance test apparatus |
| CN110146298A (en) * | 2019-04-08 | 2019-08-20 | 湖南科技大学 | Engine fuel system test device and method |
| CN110220696A (en) * | 2019-07-15 | 2019-09-10 | 中船动力研究院有限公司 | A kind of gas valve the amount of injection measuring test-bed |
| CN111721961A (en) * | 2019-03-21 | 2020-09-29 | 宝山钢铁股份有限公司 | Converter oxygen lance jet flow simulation detection system and detection method thereof |
| CN114483301A (en) * | 2021-12-09 | 2022-05-13 | 西安交通大学 | Simple gas engine jet law measuring system and method |
| CN116335818A (en) * | 2023-01-02 | 2023-06-27 | 重庆长安汽车股份有限公司 | Hydrogen engine nozzle flow measuring device and measuring method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107140A (en) * | 1985-09-04 | 1986-10-29 | 潘明道 | Fuel measuring system for internal combustion engine |
| CN1551947A (en) * | 2001-02-20 | 2004-12-01 | L������ķ˹ | Fuel delivery system |
| CN101037981A (en) * | 2006-03-17 | 2007-09-19 | 福特环球技术公司 | Apparatus with mixed fuel separator and method of separating a mixed fuel |
| CN101761436A (en) * | 2008-11-27 | 2010-06-30 | Aea有限公司 | Method for measuring the instantaneous flow rate of an injector for gaseous fuels |
-
2018
- 2018-01-22 CN CN201810057267.2A patent/CN108317032A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107140A (en) * | 1985-09-04 | 1986-10-29 | 潘明道 | Fuel measuring system for internal combustion engine |
| CN1551947A (en) * | 2001-02-20 | 2004-12-01 | L������ķ˹ | Fuel delivery system |
| CN101037981A (en) * | 2006-03-17 | 2007-09-19 | 福特环球技术公司 | Apparatus with mixed fuel separator and method of separating a mixed fuel |
| CN101761436A (en) * | 2008-11-27 | 2010-06-30 | Aea有限公司 | Method for measuring the instantaneous flow rate of an injector for gaseous fuels |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000918A (en) * | 2018-09-21 | 2018-12-14 | 中国船舶重工集团公司第七研究所 | Gas engine electric-controlled gas sprays valve test device and its test method |
| CN109000918B (en) * | 2018-09-21 | 2024-06-04 | 中国船舶集团有限公司第七一一研究所 | Testing device and testing method for electric control fuel gas injection valve of gas engine |
| CN111721961A (en) * | 2019-03-21 | 2020-09-29 | 宝山钢铁股份有限公司 | Converter oxygen lance jet flow simulation detection system and detection method thereof |
| CN110146298A (en) * | 2019-04-08 | 2019-08-20 | 湖南科技大学 | Engine fuel system test device and method |
| CN109946059A (en) * | 2019-04-17 | 2019-06-28 | 中国人民解放军第八一医院 | A kind of ultra-thin fluid jet nozzle performance test apparatus |
| CN109946059B (en) * | 2019-04-17 | 2023-11-17 | 中国人民解放军第八一医院 | Ultrathin jet nozzle performance test device |
| CN110220696A (en) * | 2019-07-15 | 2019-09-10 | 中船动力研究院有限公司 | A kind of gas valve the amount of injection measuring test-bed |
| CN114483301A (en) * | 2021-12-09 | 2022-05-13 | 西安交通大学 | Simple gas engine jet law measuring system and method |
| CN116335818A (en) * | 2023-01-02 | 2023-06-27 | 重庆长安汽车股份有限公司 | Hydrogen engine nozzle flow measuring device and measuring method |
| CN116335818B (en) * | 2023-01-02 | 2024-05-14 | 重庆长安汽车股份有限公司 | Hydrogen engine nozzle flow measuring device and measuring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108317032A (en) | A kind of experimental rig and method measuring natural gas engine gas emitted dose | |
| CN101655413B (en) | Testing device for quickly detecting flow property parameters of air passage of internal combustion engine | |
| CN105888910B (en) | A kind of atomizer balancing gate pit pressure measurement method | |
| CN104458152B (en) | Gas valve inner leakage detection method based on acoustic emission signal processing | |
| CN201387355Y (en) | Detection device for automobile air-flow meter | |
| CN101608579B (en) | Method for controlling instantaneous working condition combustion noise of diesel engine by utilizing exhaust gas recirculation and device therefor | |
| CN203335372U (en) | Transformer oil pump testing device | |
| CN100575905C (en) | Multifunction test device for exhaust gas recirculation valve | |
| CN202502086U (en) | Detection system of nitrogen oxide sensor | |
| CN202501910U (en) | Calibrating device for heavy caliber gas flow | |
| CN102434333B (en) | Auxiliary pressurization system for diesel engine bench test and using method of auxiliary pressurization system | |
| CN108301951A (en) | Measure the device and its test method of natural gas engine gas jet law | |
| CN201273868Y (en) | Multifunctional experiment apparatus for waste gas recirculation valve | |
| CN111068411A (en) | System for researching steam-water separation performance of corrugated plate dryer | |
| CN103590915A (en) | Method for measuring and calculating cycle fuel injection quantity of diesel through fuel pressure in real time | |
| CN102620938B (en) | Backfire detecting device and backfire testing method for reciprocating piston engine | |
| CN110308005A (en) | Fractions of Diesel Engine Exhaust Particulates object generation system and Fractions of Diesel Engine Exhaust Particulates object analogy method | |
| Benjamin et al. | A study of pulsating flow in automotive catalyst systems | |
| CN105388018A (en) | Total pressure difference airway tumble test apparatus for engine | |
| Wahono et al. | A study on in-cylinder flow of small engine using steady-state flow benches | |
| CN111963349A (en) | Fuel injection law testing arrangement based on adjustable backpressure of momentum method | |
| CN210037195U (en) | Gas valve injection amount measuring test bed | |
| CN201569569U (en) | Testing device capable of fast detecting flow property parameters of internal combustion engine air passage | |
| CN203572657U (en) | Parameter measuring device of internal fuel oil pipeline system of aero-engine | |
| CN102901632A (en) | Pressurization system simulating device for test bed of cylinder diameter-variable stroke-variable intermediate-speed single cylinder diesel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180724 |
|
| RJ01 | Rejection of invention patent application after publication |