CN103726966A - Compressed natural gas vehicle injector rail performance testing device and testing method thereof - Google Patents
Compressed natural gas vehicle injector rail performance testing device and testing method thereof Download PDFInfo
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- CN103726966A CN103726966A CN201310693192.4A CN201310693192A CN103726966A CN 103726966 A CN103726966 A CN 103726966A CN 201310693192 A CN201310693192 A CN 201310693192A CN 103726966 A CN103726966 A CN 103726966A
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Abstract
The invention relates to a compressed natural gas vehicle injector rail performance testing device and a testing method thereof. The testing device comprises a high-speed data measurement and control device, an injector rail driver and an injector rail test unit. The high-speed data measurement and control device comprises a communication port, a direct-current voltage regulator, a signal processing unit, a digital output unit, a digital input unit, an analog output unit, and an analog input unit. The injector rail driver comprises an injector rail drive unit, a coil resistance measuring unit and a coil voltage/current test unit. The injector rail test unit comprises an injector rail, four pressure transmitters, four temperature transmitters and four flow meters. By the compressed natural gas vehicle injector rail performance testing device and the testing method thereof, the pressure, temperature and flow of ports of the injector rail can be accurately measured and can be displayed by a computer in real time.
Description
Technical field
The invention belongs to detection technique field, be specifically related to a kind of automobile with compressed natural gas spray rail performance testing device and test method thereof.
Background technique
The urban atmospheric pollution problem that vehicle exhaust causes is on the rise.Ten the most serious metropolitan primary pollution sources of global pollution are all vehicle exhausts at present.In China, urban air pollution is very serious, and regular gasoline, exhaust gas from diesel vehicle exhaust emission account for the more than 70% of urban atmospheric pollution, are one of main atmospheric pollution sources.Therefore, advocating and carry out eco-friendly car that protection of the environment is significant, is also the Important Action of response country " energy-saving and emission-reduction " policy.In recent years, compressed natural gas (CNG) automobile is very fast in global evolution, apply and demonstration operation aspect all obtain significant progress.Because rock gas is clean energy resource, to compare with gasoline, the exhaust emissions of CNG automobile is not leaded, sulfur-bearing not substantially, carbon monoxide reduces 97%, and hydrocarbon reduces 72%, and oxynitrides reduces 39%; Low 50% left and right of its cost ratio gasoline, economic benefit and social benefit are huge.At present, there is more than 160 ten thousand, CNG automobile in the whole world, and China recent years is also being widelyd popularize, and the provinces and cities such as Sichuan, Xinjiang, Chongqing, Harbin, Shenzhen, Shanghai, Jilin, Xi'an, Haikou all actively lay down preferential policies and support the development of gas-fueled vehicles.
Corresponding therewith, as the market demand of the spray rail of CNG automobile specified parts, increasing gradually, yielding capacity and sales volume are with the speed increment of annual 4-5 times, the needs of the domestic environmental protection of this positive adaptation.Estimate the year two thousand twenty, domestic gas-fueled vehicles will reach 1,000,000, and market can be larger to the demand of spray rail when the time comes.Yet, in the face of large market like this, the performance test apparatus of compressed natural gas spray rail and quality assurance system but lack extremely, to test method shortage standard, science and the special devices such as test of spray rail spout Flow Output Property, cause the dispatching from the factory power performance of product and the conformity of individual products cannot guarantee.
Spray rail is the important component part of CNG automobile fuel gas control system, and the quality of its performance is related to the power performance of vehicle.Gas control system utilizes gas spraying rail to realize control.The spray rail that high-speed electromagnetic valve is housed adopts pulse width modulation controlled mode, according to the instruction of ECU (Electrical Control Unit) regularly to the intake manifold injection rock gas of respective cylinder.The rock gas of ejection is mixed into cylinder combustion with the fresh air that enters motor.The accurate measurement of gas spraying amount of jet under various operating modes is that control engine rotating speed keeps the precondition of highi degree of accuracy and high stability within the whole spreadable life.Because spray rail spout is in machining process, there is certain otherness, cause the different spouts of same spray rail, or the Flow characteristics between the spout of different spray rails is different, needs to carry out certain adjustment before dispatching from the factory.But according to current relevant report, still rare for the device of spray rail testing property, cause that engine operation is unstable even cannot normally work.The present invention designs in order to make up the vacancy of CNG automobile spray rail performance testing device.
Summary of the invention
The present invention mainly realizes measurement and the analysis to compressed natural gas CNG automobile spray rail performance parameter, driving and control to spray rail, and the design of spraying rail for compressed natural gas CNG automobile provides theoretical foundation and laboratory data.
For overcoming the above problems, the present invention has adopted following technological means:
Testing apparatus in the present invention, comprise high-speed data controller, spray rail driver and spray rail test cell, high-speed data controller comprises communication interface, direct current voltage regulator, signal processing unit, digital output unit, digital input unit, simulation output unit, analog input unit; Spray rail driver comprises spray rail driver element, coil resistance measuring unit and coil voltage/testing current unit; Spray rail test cell comprises spray rail, four pressure transmitters, four temperature transmitters and four flowmeters.
The output terminal of described high-speed data controller communication interface is connected with signal processing unit input end signal, the digital output end of signal processing unit is connected with digital output unit input end signal, the digital input end of signal processing unit is connected with digital input unit signal, the analog output of signal processing unit is connected with simulation output unit signal, the analog input end of signal processing unit is connected with analog input cell signal, direct current voltage regulator is signal processing unit, numeral output unit, numeral input unit, simulation output unit and analog input unit provide power supply.
The output terminal of the digital output unit in described high-speed data controller is connected with the input end signal of spray rail driver element, the output terminal of numeral output unit is connected with the input end signal of coil resistance measuring unit, the output terminal of coil resistance measuring unit is connected with the input end signal of analog input unit, and the output terminal of coil voltage/current measuring unit is connected with the input end signal of analog input unit.
The signal input part of described spray rail is connected with spray rail driver element output end signal, the signal output part of spray rail is connected with the input end signal of four flowmeters with four pressure transmitters, four temperature transmitters, and four pressure transmitters, four temperature transmitters are connected with analog input unit input end signal with four flowmeter output terminals.
Utilize said apparatus to carry out the method for automobile with compressed natural gas spray rail testing property: the communication interface of high-speed data controller sends to control signal the signal processing unit of high-speed data controller; Signal processing unit converts signal the digital signal that spray rail driver can identify to and by digital output unit, control signal is sent to spray rail driver; After the control signal that the coil resistance measuring unit of spray rail driver and coil voltage/testing current unit obtain being sent by digital output unit, will excite it to the resistance of high-speed electromagnetic valve and voltage/current, to carry out real-time testing; After the control signal that spray rail driver element obtains being sent by digital output unit, the working state of each spout of spray rail will be controlled by high-speed electromagnetic valve; The signal that coil resistance measuring unit, coil voltage/current measuring unit and spray rail and pressure transmitter, temperature transmitter and flowmeter are measured them respectively sends in the analog input unit of high speed controller with the analog current signal of 4～20mA; Analog input unit sends signal to the signal processing unit of high-speed data controller again and processes; Through the metrical information of signal processing unit processes, the communication interface by high-speed data controller and USB are sent to by data the demonstration directly perceived and the data that on computer, realize data and store again.
Furtherly, high-speed data controller can also be accepted the order that the digital input unit of measurement and control device sends and can the analogue signal of measurement be simulated to demonstration by the simulation output unit of high-speed data controller.
Beneficial effect of the present invention is:
1. use computer to carry out real-time monitored and record to the data of measuring;
2. closing or opening with software control solenoid valve and then control spray each spout of rail;
3. pair electromagnetic valve coil resistance and voltage/current performance are accurately tested;
4. can accurately measure spray rail pressure, temperature, flow mouthful everywhere and realize Real time vision;
5. by the on off state of the spout controlled, realize a port opening, flux test during its excess-three port closing, accurately measures the output performance of spout; When realizing four outlets and opening simultaneously, each rate of discharge is accurately tested, for regulating the conformity of four spout flows;
6. spray rail is placed experimental situation to can be room temperature can be also high-low temperature chamber.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, the present invention includes three parts: high-speed data controller 1, spray rail driver 2, spray rail test cell 3.
High-speed data controller comprises communication interface 1-1, direct current voltage regulator (DC/DC) 1-2, signal processing unit 1-3, digital output unit 1-4, digital input unit 1-5, simulation output unit 1-6, analog input unit 1-7.The output terminal of communication interface is connected with signal processing unit input end signal, the digital output end of signal processing unit is connected with digital output unit input end signal, the digital input end of signal processing unit is connected with digital input unit signal, the analog output of signal processing unit is connected with simulation output unit signal, and the analog input end of signal processing unit is connected with analog input cell signal.Direct current voltage regulator (DC/DC) provides power supply for signal processing unit, digital output unit, digital input unit, simulation output unit and analog input unit.
Spray rail driver comprises spray rail driver element 2-1, coil resistance measuring unit 2-2 and coil voltage/testing current unit 2-3.The output terminal of numeral output unit is connected with the input end signal of spray rail driver element, the output terminal of numeral output unit is connected with the input end signal of coil resistance measuring unit, coil resistance measuring unit is connected with the input end signal of analog input unit, and the output terminal of coil voltage/current measuring unit is connected with the input end signal of analog input unit.
Spray rail test cell comprises spray rail 3-1,4 pressure transmitter 3-2,4 temperature transmitter 3-3 and 4 flowmeter 3-4.The signal input part of spray rail is connected with spray rail driver element output end signal, the signal output part of spray rail is connected with the input end signal of 4 flowmeters with 4 pressure transmitters, 4 temperature transmitters, and 4 pressure transmitters, 4 temperature transmitters are connected with analog input unit input end signal with 4 flowmeter output terminals.
The test method of device is as follows:
After the controlled order of computer computer by himself with USB interface and the communication interface 1-1 of high-speed data controller 1 control signal is sent to the signal processing unit 1-2 of high-speed data controller; Signal processing unit converts signal the digital signal that spray rail driver 2 can identify to and by digital output unit 1-4, control signal is sent to spray rail driver 2; After the control signal that the coil resistance measuring unit 2-2 of spray rail driver 2 and coil voltage/testing current unit 2-3 obtain being sent by digital output unit 1-4, will excite it to the resistance of high-speed electromagnetic valve and voltage/current, to carry out real-time testing; After the control signal that spray rail driver element 2-1 obtains being sent by digital output unit 1-4, the working state (opening or closing) of each spout of spray rail 3-1 will be controlled by high-speed electromagnetic valve; The signal that pressure transmitter, temperature transmitter and the flowmeter of coil resistance measuring unit 2-2, coil voltage/current measuring unit 2-3 and spray rail 3-1 and pressure reducing regulator measured them respectively sends in the analog input unit 1-7 of high speed controller with the analog current signal of 4～20mA; Analog input unit sends signal to the signal processing unit of high-speed data controller again and processes; Through the metrical information of signal processing unit processes, the communication interface by high-speed data controller and USB are sent to data the demonstration directly perceived and the data that on the computer that analysis software is housed, realize data and store again; High-speed data controller can also be accepted the order that the digital input unit 1-5 of measurement and control device sends and can the analogue signal of measurement be simulated to demonstration by the simulation output unit 1-6 of high-speed data controller except the order that can accept computer and send.
Claims (3)
1. automobile with compressed natural gas sprays rail performance testing device, comprise high-speed data controller, spray rail driver and spray rail test cell, it is characterized in that: high-speed data controller comprises communication interface, direct current voltage regulator, signal processing unit, digital output unit, digital input unit, simulation output unit, analog input unit; Spray rail driver comprises spray rail driver element, coil resistance measuring unit and coil voltage/testing current unit; Spray rail test cell comprises spray rail, four pressure transmitters, four temperature transmitters and four flowmeters;
The output terminal of described high-speed data controller communication interface is connected with signal processing unit input end signal, the digital output end of signal processing unit is connected with digital output unit input end signal, the digital input end of signal processing unit is connected with digital input unit signal, the analog output of signal processing unit is connected with simulation output unit signal, the analog input end of signal processing unit is connected with analog input cell signal, direct current voltage regulator is signal processing unit, numeral output unit, numeral input unit, simulation output unit and analog input unit provide power supply,
The output terminal of the digital output unit in described high-speed data controller is connected with the input end signal of spray rail driver element, the output terminal of numeral output unit is connected with the input end signal of coil resistance measuring unit, the output terminal of coil resistance measuring unit is connected with the input end signal of analog input unit, and the output terminal of coil voltage/current measuring unit is connected with the input end signal of analog input unit;
The signal input part of described spray rail is connected with spray rail driver element output end signal, the signal output part of spray rail is connected with the input end signal of four flowmeters with four pressure transmitters, four temperature transmitters, and four pressure transmitters, four temperature transmitters are connected with analog input unit input end signal with four flowmeter output terminals.
2. the method for utilizing the device described in claim 1 to carry out the testing property of automobile with compressed natural gas spray rail, is characterized in that:
The communication interface of high-speed data controller sends to control signal the signal processing unit of high-speed data controller; Signal processing unit converts signal the digital signal that spray rail driver can identify to and by digital output unit, control signal is sent to spray rail driver; After the control signal that the coil resistance measuring unit of spray rail driver and coil voltage/testing current unit obtain being sent by digital output unit, will excite it to the resistance of high-speed electromagnetic valve and voltage/current, to carry out real-time testing; After the control signal that spray rail driver element obtains being sent by digital output unit, the working state of each spout of spray rail will be controlled by high-speed electromagnetic valve; The signal that coil resistance measuring unit, coil voltage/current measuring unit and spray rail and pressure transmitter, temperature transmitter and flowmeter are measured them respectively sends in the analog input unit of high speed controller with the analog current signal of 4～20mA; Analog input unit sends signal to the signal processing unit of high-speed data controller again and processes; Through the metrical information of signal processing unit processes, the communication interface by high-speed data controller and USB are sent to by data the demonstration directly perceived and the data that on computer, realize data and store again.
3. method according to claim 2, is characterized in that: high-speed data controller can also be accepted the order that the digital input unit of measurement and control device sends and can the analogue signal of measurement be simulated to demonstration by the simulation output unit of high-speed data controller.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1024274A2 (en) * | 1999-01-28 | 2000-08-02 | Denso Corporation | Accumulation-type fuel injection system and accumulation chamber pressure control method therefor |
| CN1465851A (en) * | 2002-06-06 | 2004-01-07 | 天津大学 | Sequential ejection, rare combustion, fully electronic controlled diesel/natural gas dual-fuel engine |
| CN101260847A (en) * | 2008-04-25 | 2008-09-10 | 奇瑞汽车股份有限公司 | Natural gas engine |
| CN102297065A (en) * | 2011-08-30 | 2011-12-28 | 潍柴动力股份有限公司 | Oil sprayer with closing time deviation compensation |
| CN203717208U (en) * | 2013-12-16 | 2014-07-16 | 中国计量学院 | Injection rail performance testing device of compressed natural gas vehicle |
-
2013
- 2013-12-16 CN CN201310693192.4A patent/CN103726966B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1024274A2 (en) * | 1999-01-28 | 2000-08-02 | Denso Corporation | Accumulation-type fuel injection system and accumulation chamber pressure control method therefor |
| CN1465851A (en) * | 2002-06-06 | 2004-01-07 | 天津大学 | Sequential ejection, rare combustion, fully electronic controlled diesel/natural gas dual-fuel engine |
| CN101260847A (en) * | 2008-04-25 | 2008-09-10 | 奇瑞汽车股份有限公司 | Natural gas engine |
| CN102297065A (en) * | 2011-08-30 | 2011-12-28 | 潍柴动力股份有限公司 | Oil sprayer with closing time deviation compensation |
| CN203717208U (en) * | 2013-12-16 | 2014-07-16 | 中国计量学院 | Injection rail performance testing device of compressed natural gas vehicle |
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