CN101464173B - System test method for liquid pressure fuel tester - Google Patents
System test method for liquid pressure fuel tester Download PDFInfo
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- CN101464173B CN101464173B CN2008101476147A CN200810147614A CN101464173B CN 101464173 B CN101464173 B CN 101464173B CN 2008101476147 A CN2008101476147 A CN 2008101476147A CN 200810147614 A CN200810147614 A CN 200810147614A CN 101464173 B CN101464173 B CN 101464173B
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- oil
- tester
- flowmeter
- liquid pressure
- pressure fuel
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Abstract
A testing system of a liquid pressurized fuel tester adopts two fuel consumption meters for measurement, and is characterized in that a flowmeter is chosen to measure the amount of incoming oil in an oil incoming channel; a returning oil testing instrument which measures the amount of fuel consumption by the constant volume timing method is used for measuring the amount of oil in the oil returning channel of an engine; the flowmeter for measuring the oil amount in the oil incoming channel is a mass flowmeter; the measurement of the oil amount in the oil returning channel is completed by the liquid pressurized fuel tester; a singlechip is used for information acquisition, processing, calculation and displaying as well as examination and correction of abnormal condition; and finally a computer is used for outputting and printing the fuel consumption of the engine.
Description
Technical field
The present invention relates to a kind of system test method for liquid pressure fuel tester, belong to the fluid measurement technical field, particularly belong to the field of measuring technique of Fuel Consumption in the engine pedestal experiment.
Background technology
In the engine pedestal experiment at present, measure the general gravimetric method figure that adopts at the consumption of liquid pressure fuel and measure as shown in Figure 2 with discharge method figure as shown in Figure 1.
Gravimetric method is promptly used Precision Electronics Balance, the weight that measuring unit's time fuel tank loses, thus calculating the Fuel Consumption of unit interval intrinsic motivation, the test unit of this method is a Precision Electronics Balance.With the Central China University of Science and Technology is that this kind method (Yusheng Zhang is adopted in representative, Chunlan Mo, Huiya Zhang et.A Study on Combustion and Emission Characteristics of Small DI DieselEngine Fuelled with Dimethyl Ether The 7th Asia-Pacific InternationalSymposium on Combustion and Energy Utilization, 15-17/12/2004, paperNo.235, Hong Kong)
The shortcoming that gravimetric method measure to exist is: meet the range and the precision of electronic scales for making the accumulative total consumption, it is long to require engine to keep time of steady working condition, and this method measuring accuracy is low, not the dynamic transient fuel consumption of energy measurement engine.
Discharge method just is to use single current amount meter, measure liquid pressure fuel in the unit interval, by the flow of flowmeter, thereby calculate the Fuel Consumption of unit interval intrinsic motivation, the test unit of this method is high precision flowmeters such as secondary fuel tank and mass flowmeter.
Xi'an Communications University (the yellow assistant of king He Wu Zhou Longbao China etc. the experimental study of direct injection diesel engine dimethyl ether fuel " internal combustion engine journal " 1999/17/03 P 241-246.) and units such as the ET2700 electronic fuel injection engine oil return processor of the instantaneous fuel consumption meter of ToCeiL engine developed of hanghai Tongyuan Environment Technology Co., Ltd, Chengdu company of sincere nation, Longkou AM400 flow sensor all adopt this method to test.
Discharge method is measured the shortcoming that exists: the test basis of this method of testing is based upon on " amount of fuel is constant in the auxiliary fuel tank " this prerequisite, yet variation along with engine condition, advance, recirculating oil quantity all is pulsating flow, and fuel density is also non-constant in the auxiliary fuel tank, in the case, it all is difficult measuring the variation of fuel mass in the auxiliary fuel tank or keeping fuel mass constant, and it is inaccurate therefore measuring.
Summary of the invention
The objective of the invention is in order to overcome above deficiency, an a kind of difficult problem that solves gas in the oil return circuit, the test of liquid two-phase fuel blend is provided, can accurately measures the system test method for liquid pressure fuel tester of accumulative total fuel consumption and dynamic transient fuel consumption.
Technical scheme of the present invention is: system test method for liquid pressure fuel tester adopts two fuel consumption meters to measure, it is characterized in that in the oil-feed oil circuit, select for use flowmeter to carry out the measurement of oil-feed oil mass, on oil return circuit, the oil return tester of being measured Fuel Consumption by a kind of constant volume chronometry carries out the measurement of engine oil return circuit oil mass; The flowmeter of measuring oil mass in the oil-feed oil circuit is a mass flowmeter, measuring oil mass in the oil return circuit is to be finished by the measurement of oil return tester---promptly measure the time that liquid is full of the constant volume pressure vessel, subtract each other the Fuel Consumption that comes calculation engine with the oil-feed flowmeter with the Fuel Consumption of measuring in the time, its mathematical equation is:
g＝g
j-g
h
G in the formula---Fuel Consumption (g);
g
j---oil-feed oil mass (g); g
h---oil return oil mass (g);
Wherein, g
j, g
hFor:
g
h＝V
D×ρ
V
D---constant volume volume ρ---fluid density
G
k---the accumulative total quality of oil-feed flowmeter in time t
Described system test method for liquid pressure fuel tester is made up of position signalling sensor, input circuit, singlechip controller, driving circuit, solenoid valve and LED solenoid valve display and is finished detection system automatically, in this system, engine oil-feed flow is by mass flow meter measurement, real-time measurement values changes the output of 4～20mA simulating signal into, through the input circuit conditioning, by the single-chip microcomputer collection; The engine oil return is through the solenoid control loop, flow in the high pressure resistant glass container, cooperation by single-chip microcomputer, detect the time of constant volume recirculating oil quantity, density by known fuel, calculate the quality of oil return in the unit interval, also calculate the quality of fuel feeding in the unit interval simultaneously, calculate the oil consumption of engine with this.
Described liquid pressure fuel tester adopts transparent glass tube as the constant volume container, constitutes liquid level detection device by light emitting diode and photodiode, sends look-at-me; As the topworks that realizes workflow, simultaneously, the pressure and temperature of tracer liquid is revised fluid density by five solenoid valves.
Described oil return tester is finished measurement, calculating, demonstration and abnormality inspection correction automatically.
The invention has the beneficial effects as follows:
This system test method for liquid pressure fuel tester can have the Fuel Consumption of the engine of oil return apparatus to test to electronic fuel injection engine, diesel engine, liquid pressure fuel engine etc. separately.Also can with ET2000 engine TT﹠C system compatibility, performances such as the dynamic property of engine, economy are tested.The data of test and trial curve analysis are true, effective, safe and reliable in the test process, easy to operate, are quick on the draw, and data fluctuations is little, and accuracy has reached 0.3 grade, can carry out the telecommunication control survey.
Description of drawings
The present invention will be further described in conjunction with the accompanying drawings
Fig. 1 is existing gravimetric method test philosophy figure;
Fig. 2 is existing discharge method test philosophy figure;
Fig. 3 is liquid pressure fuel tester static demarcating test principle figure of the present invention
Fig. 4 is liquid pressure fuel tester test test principle figure of the present invention;
Fig. 5 is a liquid pressure fuel tester test macro functional block diagram of the present invention
Fig. 6 is liquid pressure fuel tester test macro duty 1 figure of the present invention
Fig. 7 is liquid pressure fuel tester test macro duty 2 figure of the present invention
Fig. 8 is liquid pressure fuel tester test macro duty 3 figure of the present invention
Fig. 9 is liquid pressure fuel tester test macro duty 4 figure of the present invention
Figure 12 is the Test Application figure of liquid pressure fuel tester test macro of the present invention on engine pedestal
Parts, position and numbering among the figure:
1-fuel tank 2-mass flowmeter 3-liquid pressure fuel tester 4-graduated cylinder A 5-graduated cylinder B
6-valve x1 7-valve x2 8-valve x3 9-engine 10-oil-feed solenoid valve D1
11-Through solenoid valve D2 12-goes out solenoid D3 13-air inlet solenoid valve D4 14-exhaust electromagnetism D5
15-temperature sensor 16-pressure transducer 17-oil return flow rate test jar 18-liquid level sensor
19-high-pressure nitrogen bottle 20-DME fuel tank 21-fuel flowmeter 22-DME discharge pump
23-pressure regulator 24-accumulator 25-high-pressure pump 26-nozzle
Embodiment
Connect with pipeline and cable by wiring diagram shown in Figure 4.
The design of liquid pressure fuel tester
A, liquid pressure fuel tester system functional block diagram be as shown in Figure 5:
In system, engine oil-feed flow is by mass flow meter measurement, and real-time measurement values changes the output of 4～20mA simulating signal into, through the input circuit conditioning, by the single-chip microcomputer collection; The engine oil return is through the solenoid control loop, flow in the high pressure resistant glass container, cooperation by single-chip microcomputer, detect the time of constant volume recirculating oil quantity, density by known fuel, calculate the quality of oil return in the unit interval, also calculate the quality of fuel feeding in the unit interval simultaneously, calculate the oil consumption of engine with this; Whole system is finished measurement, calculating, demonstration and abnormality inspection automatically, can carry out Long-distance Control and measure.
The workflow design of each solenoid valve in B, the liquid pressure fuel tester
Liquid pressure fuel tester is used for the oil return oil measurement of liquid pressure fuel engine, and it is 4 kinds that its duty is divided into:
A) normal working of engine is not carried out oil measurement.Oil-feed this moment 10-oil-feed solenoid valve D1 closes, 11-Through solenoid valve D2 opens, 12-goes out solenoid D3 and closes, and engine oil return route as shown in Figure 6.
B) begin to measure engine consumption.10-oil-feed this moment solenoid valve D1 opens, 11-Through solenoid valve D2,12-go out solenoid D3,13-air inlet solenoid valve D4,14-exhaust electromagnetism D5 close, and when the lower bound Level Detection is a true time, pick up counting, and add up the oil-feed oil mass simultaneously.Engine oil return route as shown in Figure 7.
C) detect end, evacuation of liquid.When high limit Level Detection is a true time, stop timing and close 10-oil-feed solenoid valve D1, open 11-Through solenoid valve D2,12-and go out solenoid D3,13-air inlet solenoid valve D4, calculate simultaneously and display result and upload host computer.Engine oil return route as shown in Figure 8.
D) get rid of nitrogen, enter holding state.When the lower bound Level Detection for not the time, close 12-and go out solenoid D3,13-air inlet solenoid valve D4, open 14-exhaust electromagnetism D5, carry out the nature emptying, when pressure is lower than setting value, close 14-exhaust electromagnetism D5, enter holding state.Engine oil return route as shown in Figure 9.
The structural design of C, liquid pressure fuel tester
Liquid pressure fuel tester structurally adopts transparent glass tube as the constant volume container; Constitute liquid level detection device by light emitting diode and photodiode, send look-at-me; By the topworks of five solenoid valves as the realization workflow.Simultaneously, the pressure and temperature of tracer liquid is revised fluid density.
The practical application test of system test method for liquid pressure fuel tester
Adopt the method liquid towards pressure fuel tester test macro of static demarcating to demarcate, at first connect the back with pipeline and system is demarcated nominal data such as table 1 by wiring diagram shown in Figure 3.
Table 1 liquid pressure fuel tester static demarcating data logger
| Demarcate number of |
1 | 2 | 3 | 4 | 5 | 6 |
| Measurement time t (s) | 25.75 | 26.29 | 26.95 | 25.30 | 25.30 | 26.93 |
| Liquid volume V in the graduated cylinder h(ml) | 105 | 110 | 112 | 115 | 110 | 108 |
| Actual liquid consumption B s(kg/h) | 14.68 | 15.06 | 14.96 | 16.36 | 15.65 | 14.44 |
| Measure and show consumption B x(kg/h) | 14.72 | 15.10 | 15.00 | 16.40 | 15.69 | 14.47 |
| Relative error δ (%) | 0.28 | 0.25 | 0.26 | 0.22 | 0.24 | 0.22 |
Can be drawn by above data, the accuracy of this liquid pressure fuel tester can reach 0.3 grade.
This system test method for liquid pressure fuel tester can use separately, carries out the Fuel Consumption test that electronic fuel injection engine, diesel engine, liquid pressure fuel engine etc. have the engine of oil return apparatus.Also can with ET2000 engine TT﹠C system compatibility, performances such as the dynamic property of engine, economy are tested.
Utilize this system test method for liquid pressure fuel tester, cooperate, on engine pedestal, the economy of ZS1100 diesel engine dimethyl ether fuel has been carried out experimental study with ET2000 engine TT﹠C system.Test figure sees Table 2, and trial curve as shown in figure 10 and as shown in figure 11.
By test figure and trial curve analysis, test figure is true, effective, and trial curve trend meets the diesel engine characteristics.
This system test method for liquid pressure fuel tester is in process of the test, and is safe and reliable, easy to operate, is quick on the draw, and data fluctuations is little.
The test figure table of the ZS1100 diesel engine that table 2 dimethyl ether engine fuel consumption measuring system records
By above test figure and operating position as can be known, this system test method for liquid pressure fuel tester accuracy of measurement has reached 0.3 grade, and total system is safe in utilization, reliable, and is easy to operate.Trial curve trend meets the diesel engine characteristics.
Claims (3)
1. liquid pressure fuel tester test macro, adopt two fuel consumption meters to measure, it is characterized in that in the oil-feed oil circuit, select for use flowmeter to carry out the measurement of oil-feed oil mass, on oil return circuit, the oil return tester of being measured Fuel Consumption by a kind of constant volume chronometry carries out the measurement of engine oil return circuit oil mass; The flowmeter of measuring oil mass in the oil-feed oil circuit is a mass flowmeter, measuring oil mass in the oil return circuit is to be finished by the measurement of oil return tester---promptly measure the time that liquid is full of the constant volume pressure vessel, subtract each other the Fuel Consumption that comes calculation engine with the oil-feed flowmeter with the Fuel Consumption of measuring in the time, its mathematical equation is:
g＝g
j-g
h
G in the formula---Fuel Consumption (g);
g
j---oil-feed oil mass (g); g
h---oil return oil mass (g);
Wherein, g
j, g
hFor:
g
h＝V
D×ρ
V
D---constant volume volume ρ---fluid density
G
k---the accumulative total quality of oil-feed flowmeter in time t
2. a kind of liquid pressure fuel tester test macro as claimed in claim 1, it is characterized in that liquid pressure fuel tester adopts transparent glass tube as the constant volume container, constitute liquid level detection device by light emitting diode and photodiode, send look-at-me; As the topworks that realizes workflow, simultaneously, the pressure and temperature of tracer liquid is revised fluid density by five solenoid valves.
3. a kind of liquid pressure fuel tester test macro as claimed in claim 1 is characterized in that the liquid pressure fuel tester test macro finishes measurement, calculating, demonstration and abnormality inspection correction automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101476147A CN101464173B (en) | 2008-11-20 | 2008-11-20 | System test method for liquid pressure fuel tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101476147A CN101464173B (en) | 2008-11-20 | 2008-11-20 | System test method for liquid pressure fuel tester |
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|---|---|
| CN101464173A CN101464173A (en) | 2009-06-24 |
| CN101464173B true CN101464173B (en) | 2011-01-26 |
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| CN105928824A (en) * | 2016-05-25 | 2016-09-07 | 江苏康缘药业股份有限公司 | Honeysuckle flower and artemisia apiacea concentrated solution vacuum concentration extract density measuring device and control method thereof |
| CN107063404B (en) * | 2017-04-13 | 2023-06-20 | 成都安迪生测量有限公司 | Calibration method of cryogenic liquid level measuring instrument |
| CN110736526B (en) * | 2019-11-22 | 2020-12-01 | 西安航天计量测试研究所 | High-temperature gas flowmeter calibration device and method for liquid oxygen kerosene engine |
| CN111946520A (en) * | 2020-08-25 | 2020-11-17 | 上海星融汽车科技有限公司 | Oil return detection method for common rail system of engine |
| CN114199582A (en) * | 2021-12-09 | 2022-03-18 | 中国船舶重工集团公司第七一一研究所 | Online fuel consumption rate testing system and method for common rail type engine |
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Granted publication date: 20110126 Termination date: 20111120 |