CN110397534A - The ultrasonic measuring device and measurement method of differential pressure type single injection of fuel quality - Google Patents
The ultrasonic measuring device and measurement method of differential pressure type single injection of fuel quality Download PDFInfo
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- CN110397534A CN110397534A CN201910634067.3A CN201910634067A CN110397534A CN 110397534 A CN110397534 A CN 110397534A CN 201910634067 A CN201910634067 A CN 201910634067A CN 110397534 A CN110397534 A CN 110397534A
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The ultrasonic measuring device and measurement method of differential pressure type single injection of fuel quality.Prior art measurement container pressure variation and the container inner medium velocity of sound obtain the quality of single injection of fuel, and acquired pressure is to keep pressure sensor range ability bigger than normal based on obtained by atmospheric pressure, influence measurement accuracy.Its composition of the invention includes: measuring device, measuring device includes fuel container A(2), the bottom fuel container A is equipped with ultrasonic transducer (1), ultrasonic transducer is connect by conducting wire with pulse generation/receiver (12), pulse generation/receiver respectively with temperature sensor (15), data collector (13) connection, data collector is connect by conducting wire with display and controller (14), temperature sensor is installed on the left of fuel container A, right side is connect by differential manometer (7) with fuel container B(9), injector (4) are installed above fuel container A.The present invention is used for the ultrasonic measuring device of differential pressure type single injection of fuel quality.
Description
Technical field:
The present invention relates to non-cpntact measurement fields, and in particular to a kind of ultrasonic measurement dress of differential pressure type single injection of fuel quality
It sets and measurement method, is also applied for during other liquid medium high-pressure injections, the measurement of the small jet quality of single.
Background technique:
Have accuracy high using ultrasonic measurement single injection of fuel quality, measures convenient feature, a kind of base of the prior art
In the single injection of fuel instrument of supersonic technique, obtained by the pressure change and the container inner medium velocity of sound that measure container
The quality of single injection of fuel, but acquired pressure be based on atmospheric pressure it is obtained so that required pressure sensor range
Range is bigger than normal, influences measurement accuracy；Also have using ultrasonic reflection coefficient and the velocity of sound and measure single oil spout quality, but adopt
Need biggish coefficient differentials that can just obtain apparent mass change in this way.
High-pressure common rail fuel injection technic is to reduce engine exhaust emission, improves the important means of fuel economy, so
And due to manufacture, assembly and control etc., what the amount of fuel and each cylinder of engine that each working cycles spray into cylinder sprayed into
The not consistent property of oil mass, which results in the increases of the unstable of engine running speed and discharge；In order to reduce distributive value not
Consistency measures single distributive value, and compensating to Injection Control becomes the effective ways for improving diesel speed control, oil spout
The method of amount detection has two kinds of detection of the detection of average distributive value and single distributive value, and the detection method of average oil mass mainly has
Graduated cylinder method, weight method, volumetric method etc., collimation error when graduated cylinder method is due to the foozle of graduated cylinder, the error of graduation and measurement, lead
Cause measurement accuracy very low；The fuel oil of ejection is input in fixed container by weight method needs, uses electronic balance weighing distributive value
The variable quantity of container mass, simple conversion can obtain the average distributive value of fuel oil, and volumetric method uses stable-pressure device, oil spout
The fuel oil that device sprays is collected in the container that a volume size determines, the total degree of oil spout when record fuel oil fills the container,
By calculating the distributive value that can be obtained in each duty cycle, measurement accuracy is relatively low.
Summary of the invention:
The object of the present invention is to provide the ultrasonic measuring devices and measurement method of a kind of differential pressure type single injection of fuel quality, main
If the relative pressure for selecting differential manometer to obtain before and after oil spout is poor, so that the range ability of required measuring cell greatly reduces, survey
It is more accurate to measure result.
Above-mentioned purpose is realized by following technical scheme:
A kind of ultrasonic measuring device of differential pressure type single injection of fuel quality, composition includes: measuring device, the measurement
Device includes fuel container A, and the bottom fuel container A is equipped with ultrasonic transducer, and the ultrasonic transducer is logical
Conducting wire is crossed to connect with pulse generation/receiver, the pulse generation/receiver respectively with temperature sensor, data collector
Connection, the data collector are connect by conducting wire with display and controller, are equipped on the left of the fuel container A described
Temperature sensor, right side connect by differential manometer with fuel container B, and the top fuel container A is equipped with injector.
The ultrasonic measuring device of the differential pressure type single injection of fuel quality, the side fuel container A have
Two interfaces, one of interface are connect by difference gauge with fuel container B, another interface is successively changed with safety valve, electromagnetism
It is connected to valve, secondary exhaust is installed above the solenoid directional control valve connection fuel container B, the fuel container B
Hole, the secondary gas vent are connect by exhaust pipe with exhaust valve, and the exhaust valve is by being threadably mounted at the combustion
On the drive end bearing bracket of oil vessel A, the drive end bearing bracket middle position is equipped with the injector.
The ultrasonic measuring device of the differential pressure type single injection of fuel quality, the inside fuel container A are full of
Fuel oil, the lower section of the fuel container A have in-line, and the side fuel container B has vent line.
A kind of ultrasonic measuring device and measurement method of differential pressure type single injection of fuel quality, this method include following step
It is rapid:
It is to pass through ultrasonic waves using display and controller driving pulse generation/receiver production pulse signal, the signal first
Energy device becomes ultrasonic signal and acquires its velocity of sound c in the follow-up process, measures fuel container A using differential manometer and fuel oil holds
Relative pressure of the device B before and after oil spout, according to the volume of oil liquid, opposite pressure before and after the velocity of sound c of ultrasonic wave and oil spout
DifferenceObtain single oil spout quality；
One ultrasonic transducer, including ultrasonic transmitter and ultrasonic receiver are installed in the bottom of fuel container A,
It is separately mounted to the bottom and top of container, after ultrasonic signal is launched by ultrasonic transmitter, is held according in fuel oil
The time of the displacement and sampling passed through in device A acquires the velocity of sound of ultrasonic wave, is equipped with oil spout in the drive end bearing bracket of fuel container A
Device, fuel oil or other liquid mediums can be injected to full of being equipped in the fuel container A of same liquid medium, due to combustion by this
Oil vessel A does not have air, therefore the pressure meeting due to the Incoercibility of liquid, after spraying into micro fuel oil, in fuel container A
Sharply increase；
A differential manometer and a solenoid directional control valve, the solenoid directional control valve are connected between fuel container A and fuel container B
For two-position three way, fuel oil injects fuel container B by fuel container A, the electromagnetic switch valve actuation before measurement single oil spout quality every time
Make the access between truncation fuel container A and fuel container B, is being deposited between fuel container A and fuel container B after injector oil spout
It measures in pressure difference value and by differential manometer, is obtained with thisValue, electromagnetic switch valve events after measurement, fuel oil is by fuel-displaced
Mouth enters fuel tank；
When the hypertonia in container, it can be released automatically by safety valve, obtain injector internal combustion using temperature sensor
The real time temperature of oil, at a temperature of different, density and the velocity of sound difference of fuel oil, using temperature sensor to the density harmony of fuel oil
Speed is modified, and can calculate relatively accurate single injection event fuel oil quality.
The utility model has the advantages that
1. of the invention proposes a kind of single injection of fuel mass measuring method based on supersonic technique, can not only survey
The fuel oil quality for measuring single injection event, can also measure the absolute mass in container, suitable for different fuel mediums and mixing
Fuel medium, this method do not need to utilize ultrasonic measurement reflection coefficient and the velocity of sound, it is only necessary to which measuring pressure change can count
Single injection of fuel quality is calculated, while the relative pressure that this method selects differential manometer to obtain before and after oil spout is poor, so that required survey
The range ability of amount element greatly reduces.
Present invention has an advantage that using a ultrasonic transducer and a differential manometer, by measurement fuel container A
Pressure difference before and after the velocity of sound of ultrasonic wave, oil spoutAnd the volume of fuel container A, the jet quality of single fuel oil is obtained,
But the configuration of the present invention is simple, single injection of fuel quality can be repeatedly measured, different medium fuel oil can also be measured and mixed
Medium fuel oil single injection event quality is closed, it is smaller using relative pressure difference numerical value measured by differential manometer, so measurement result is more
Add precisely.
Fuel oil quality in the container of structure of the invention due to calculating injection front and back, can be used for multiple times, not need
Fuel oil is bled off before use, when the hypertonia in container, can be released automatically by safety valve, securely and reliably.
Detailed description of the invention:
Attached drawing 1 is system structure diagram of the invention.
Attached drawing 2 is mechanical mechanism schematic diagram of the invention.
Attached drawing 3 is the principle of the present invention figure.
Wherein: 1 ultrasonic transducer, 2 fuel container A, 3 drive end bearing brackets, 4 injectors, 5 exhaust valves, 6 exhaust pipes, 7 pressure differences
Meter, 8 auxiliary exhaust ports, 9 fuel container B, 10 solenoid directional control valves, 11 safety valves, 12 impulse generators, 13 data collectors, 14 are shown
Show device and controller, 15 temperature sensors.
Specific embodiment:
Embodiment 1:
A kind of ultrasonic measuring device of differential pressure type single injection of fuel quality, composition includes: measuring device, the measurement
Device includes fuel container A2, and the bottom fuel container A is equipped with ultrasonic transducer 1, the ultrasonic transducer
Connect by conducting wire with pulse generation/receiver 12, the pulse generation/receiver respectively with temperature sensor 15, data
Collector 13 connects, and the data collector is connect by conducting wire with display and controller 14, on the left of the fuel container A
The temperature sensor is installed, right side is connect by differential manometer 7 with fuel container B (9), above the fuel container A
Injector 4 is installed.
Embodiment 2:
According to the ultrasonic measuring device of differential pressure type single injection of fuel quality described in embodiment 1, the side fuel container A
There are two interface, one of interface is connect by difference gauge with fuel container B mask, another interface successively with safety valve
11, solenoid directional control valve 10 connects, peace above the solenoid directional control valve connection fuel container B, the fuel container B
Equipped with secondary gas vent 8, the secondary gas vent is connect by exhaust pipe 6 with exhaust valve 5, and the exhaust valve is pacified by screw thread
On the drive end bearing bracket 3 of the fuel container A, the drive end bearing bracket middle position is equipped with the injector.
Embodiment 3:
According to the ultrasonic measuring device of differential pressure type single injection of fuel quality as described in example 2, in the fuel container A
Portion is full of fuel oil, and the lower section of the fuel container A has in-line, and the side fuel container B has vent line.
Embodiment 4:
A kind of ultrasonic measuring device and measurement method using differential pressure type single injection of fuel quality described in embodiment 1-3,
This method comprises the following steps:
It is to pass through ultrasonic waves using display and controller driving pulse generation/receiver production pulse signal, the signal first
Energy device becomes ultrasonic signal and acquires its velocity of sound c in the follow-up process, measures fuel container A using differential manometer and fuel oil holds
Relative pressure of the device B before and after oil spout, according to the volume of oil liquid, opposite pressure before and after the velocity of sound c of ultrasonic wave and oil spout
DifferenceObtain single oil spout quality；
One ultrasonic transducer, including ultrasonic transmitter and ultrasonic receiver are installed in the bottom of fuel container A,
It is separately mounted to the bottom and top of container, after ultrasonic signal is launched by ultrasonic transmitter, is held according in fuel oil
The time of the displacement and sampling passed through in device A acquires the velocity of sound of ultrasonic wave, is equipped with oil spout in the drive end bearing bracket of fuel container A
Device, fuel oil or other liquid mediums can be injected to full of being equipped in the fuel container A of same liquid medium, due to combustion by this
Oil vessel A does not have air, therefore the pressure meeting due to the Incoercibility of liquid, after spraying into micro fuel oil, in fuel container A
Sharply increase；
A differential manometer and a solenoid directional control valve, the solenoid directional control valve are connected between fuel container A and fuel container B
For two-position three way, fuel oil injects fuel container B by fuel container A, the electromagnetic switch valve actuation before measurement single oil spout quality every time
Make the access between truncation fuel container A and fuel container B, is being deposited between fuel container A and fuel container B after injector oil spout
It measures in pressure difference value and by differential manometer, is obtained with thisValue, electromagnetic switch valve events after measurement, fuel oil is by fuel-displaced
Mouth enters fuel tank；
When the hypertonia in container, it can be released automatically by safety valve, obtain injector internal combustion using temperature sensor
The real time temperature of oil, at a temperature of different, density and the velocity of sound difference of fuel oil, using temperature sensor to the density harmony of fuel oil
Speed is modified, and can calculate relatively accurate single injection event fuel oil quality.
The ultrasonic measuring device of the differential pressure type single injection of fuel quality and the principle of measurement method are as follows:
The principle of this method is as shown in Fig. 1, produces pulse signal using display and controller driving pulse generation/receiver,
The signal becomes ultrasonic signal and obtains its velocity of sound by ultrasonic transducer, using differential manometer measure fuel container A and
Relative pressure of the fuel container B before and after oil spout, according to the volume of oil liquid, the velocity of sound of ultrasonic waveAnd before and after oil spout
Relative pressureObtain single oil spout quality；
Assuming that being in vacuum state in fuel container, oil liquid fills entire fuel container a always, and volume is.In fuel container a
The density of oil liquid be, be a unknown quantity, then under the state fuel container oil quality are as follows:
(1)
If the velocity of sound of ultrasonic wave is, then have:
(2)
In formula:For the elasticity modulus of oil liquid in fuel container.
In view of the heterogeneity of multiple measuring state lower density, ultrasonic acoustic is calculated using pulse echo measuring principle
Speed:
(3)
In formula:Indicate the vertical range between ultrasonic transmitter and ultrasonic receiver.It indicates ultrasonic wave transmitting and receives
Total time.
According to measured ultrasonic velocity valuePressure increment can be obtainedWith densityBetween relationship:
(4)
Single injection of fuel quality finally can be obtained according to formula (1), (3), (4)And pressureRelationship:
(5)
Main device required for the inventive method includes fuel container A, fuel container B, ultrasonic transducer, electromagnetic switch
Valve, oil outlet, oil inlet, jet, differential manometer, pulse generation/receiver, data collector and display and processor.This Shen
The velocity of sound that fuel oil in the container of fuel oil injection front and back please be obtained using ultrasonic transducer measurement is measured fuel oil using differential manometer and held
Pressure difference between device A and fuel container B, so that the fuel oil quality of single injection event be calculated；
Ultrasonic wave transmitting is determined and is adopted in detection process with the length that the received time is a digit pulse wave signal
Sample rate can accurately obtain the velocity of sound of ultrasonic wave.
The application further includes features some in this way:
1. needing to fill the liquid with injection fuel oil same media before container measurement, it is impermissible for air, in order to guarantee measurement essence
Degree preferably makes the pressure in container be greater than an atmospheric pressure.
Oil vessel A and oil vessel part B is respectively arranged with safety valve out, preventing the pressure in container is more than to hold
The pressure of device need to use value.
Claims (4)
1. a kind of ultrasonic measuring device of differential pressure type single injection of fuel quality, composition includes: measuring device, feature
Be: the measuring device includes fuel container A, and the bottom fuel container A is equipped with ultrasonic transducer, and described is super
Acoustic wave transducer is connect by conducting wire with pulse generation/receiver, the pulse generation/receiver respectively with temperature sensing
Device, data collector connection, the data collector are connect by conducting wire with display and controller, the fuel container A
Left side is equipped with the temperature sensor, and right side is connect by differential manometer with fuel container B, above the fuel container A
Injector is installed.
2. the ultrasonic measuring device of differential pressure type single injection of fuel quality according to claim 1, it is characterized in that: described
The side fuel container A tool there are two interface, one of interface is connect by difference gauge with fuel container B, another interface
It is successively connect with safety valve, solenoid directional control valve, the solenoid directional control valve connection fuel container B, the fuel oil holds
Secondary gas vent is installed, the secondary gas vent is connect by exhaust pipe with exhaust valve, and the exhaust valve passes through above device B
It is threadably mounted on the drive end bearing bracket of the fuel container A, the drive end bearing bracket middle position is equipped with the injector.
3. the ultrasonic measuring device of differential pressure type single injection of fuel quality according to claim 2, it is characterized in that: described
Fuel container A inside be full of fuel oil, the lower section of the fuel container A has in-line, the side the fuel container B tool
There is vent line.
4. a kind of survey using the ultrasonic measuring device of differential pressure type single injection of fuel quality described in one of claim 1-3
Amount method, it is characterized in that: this method comprises the following steps:
It is to pass through ultrasonic waves using display and controller driving pulse generation/receiver production pulse signal, the signal first
Energy device becomes ultrasonic signal and acquires its velocity of sound c in the follow-up process, measures fuel container A using differential manometer and fuel oil holds
Relative pressure of the device B before and after oil spout, according to the volume of oil liquid, opposite before and after the velocity of sound c of ultrasonic wave and oil spout
Pressure differenceObtain single oil spout quality；
One ultrasonic transducer, including ultrasonic transmitter and ultrasonic receiver are installed in the bottom of fuel container A,
It is separately mounted to the bottom and top of container, after ultrasonic signal is launched by ultrasonic transmitter, is held according in fuel oil
The time of the displacement and sampling passed through in device A acquires the velocity of sound of ultrasonic wave, is equipped with oil spout in the drive end bearing bracket of fuel container A
Device, fuel oil or other liquid mediums can be injected to full of being equipped in the fuel container A of same liquid medium, due to combustion by this
Oil vessel A does not have air, therefore the pressure meeting due to the Incoercibility of liquid, after spraying into micro fuel oil, in fuel container A
Sharply increase；
A differential manometer and a solenoid directional control valve, the solenoid directional control valve are connected between fuel container A and fuel container B
For two-position three way, fuel oil injects fuel container B by fuel container A, the electromagnetic switch valve actuation before measurement single oil spout quality every time
Make the access between truncation fuel container A and fuel container B, is being deposited between fuel container A and fuel container B after injector oil spout
It measures in pressure difference value and by differential manometer, is obtained with thisValue, electromagnetic switch valve events after measurement, fuel oil is by going out
Hydraulic fluid port enters fuel tank；
When the hypertonia in container, it can be released automatically by safety valve, obtain injector internal combustion using temperature sensor
The real time temperature of oil, at a temperature of different, density and the velocity of sound difference of fuel oil, using temperature sensor to the density harmony of fuel oil
Speed is modified, and can calculate relatively accurate single injection event fuel oil quality.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113153601A (en) * | 2021-05-08 | 2021-07-23 | 重庆红江机械有限责任公司 | Stabilizing device convenient for measuring oil injection quantity of oil injector |
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