CN109723591A - Fuel injector detection system - Google Patents
Fuel injector detection system Download PDFInfo
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- CN109723591A CN109723591A CN201811025892.5A CN201811025892A CN109723591A CN 109723591 A CN109723591 A CN 109723591A CN 201811025892 A CN201811025892 A CN 201811025892A CN 109723591 A CN109723591 A CN 109723591A
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- 238000001514 detection method Methods 0.000 title claims abstract description 138
- 239000000446 fuel Substances 0.000 title claims abstract description 128
- 239000003921 oil Substances 0.000 claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 230000000704 physical effect Effects 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 239000000295 fuel oil Substances 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 238000000605 extraction Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 11
- 230000009466 transformation Effects 0.000 claims description 8
- 238000005286 illumination Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 241001269238 Data Species 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000036314 physical performance Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
A kind of fuel injector detection system, the detection system include physical property detection module and electric property module；The physical property detection module includes first control unit, oil pressure cntrol unit, observing unit, driving unit；The oil pressure cntrol unit is connected to the first control unit and under first control unit control according to the rated pressure control oil pump fuel feeding of fuel injector to be measured or oil extraction；The driving unit is connected to the first control unit and drives fuel injector injection fuel oil to be measured under first control unit control；Observing unit auxiliary under first control unit control realizes that uniformity/sprayability of fuel injector injection to be measured tests and measures distributive value；The electric property detection module includes reference voltage unit, four wire bridge unit, ADC AD conversion unit and the second control unit.Fuel injector detection system of the invention has the characteristics that detection function is complete, low using simplicity, application cost.
Description
Technical field
The present invention relates to field of electronic device more particularly to a kind of fuel injector detection systems.
Background technique
Due to advantage of the fuel direct injection technology (GDI) in terms of dynamic property, the fuel consumption and emission feature of environmental protection, in vapour
Vehicle power systems art application is more and more wider.Fuel injector is directly determined as core component therein, life cycle performance
The life cycle performance of engine.
At present, the life cycle performance detection of common non-straight injection injector there are the method for more maturation and is set in the market
It is standby, but these methods and apparatus are helpless for GDI fuel injector.In addition, with the promotion of environmental requirement, liquefied natural gas
(Liquid Natural Gas, LNG)/compressed natural gas (Compressed Natural Gas, CNG) is high as a kind of environmental protection
Economic new energy fuel is imitated, using more and more extensive, CNG internal combustion engine is also increasingly wider in the application of high-power field, existing
Detection technique can not solve the problems, such as the performance detection of fuel injector in GDI engine and the life cycle of CNG engine.
Summary of the invention
It is an object of the invention to propose a kind of fuel injector detection system solution, nothing present in existing scheme is solved
The problem of method detects direct-injection fuel injector and CNG fuel injector provides a kind of fuel injector detection system.
Technical solution proposed by the invention is as follows:
The invention proposes a kind of fuel injector detection system, the detection system includes physical property detection module；It is described
Physical property detection module includes first control unit, oil pressure cntrol unit, observing unit, driving unit；The oil pressure cntrol
Unit is connected to the first control unit and under first control unit control according to the rated pressure of fuel injector to be measured
Control oil pump fuel feeding or oil extraction；The driving unit is connected to the first control unit and controls in the first control unit
Lower driving fuel injector to be measured sprays fuel oil；The observing unit is connected to the first control unit and in the first control list
The lower auxiliary of member control realizes that uniformity/sprayability of fuel injector injection to be measured tests and measures distributive value.
In fuel injector detection system of the present invention, the detection system includes electrical characteristic detection module, and institute
Stating electrical characteristic detection module includes that reference voltage unit, four wire bridge unit, ADC AD conversion unit and the second control are single
Member；The reference voltage unit is connected to the four wire bridge unit and provides reference voltage for the four wire bridge unit, institute
It states four wire bridge unit and is separately connected the ADC AD conversion unit and fuel injector to be measured and by the impedance operator of fuel injector to be measured
Voltage to be measured is converted to, and the ADC AD conversion unit converts voltage, the ADC according to the reference voltage computing impedance
AD conversion unit is connected to second control unit and converts voltage to the second control unit output impedance, and described the
Two control units calculate the impedance of fuel injector to be measured according to impedance transformation voltage and voltage to be measured.
In fuel injector detection system of the present invention, the detection system includes electrical characteristic detection module, and institute
Stating electrical characteristic detection module includes reference voltage unit, four wire bridge unit and ADC AD conversion unit；The reference voltage
Unit is connected to the four wire bridge unit and provides reference voltage, the four wire bridge unit point for the four wire bridge unit
The ADC AD conversion unit and fuel injector to be measured are not connected and the impedance operator of fuel injector to be measured is converted into voltage to be measured,
And the ADC AD conversion unit converts voltage, the ADC AD conversion unit connection according to the reference voltage computing impedance
Voltage is converted to the first control unit and to the first control unit output impedance, the first control unit is according to resistance
Anti-rotation changes voltage and voltage to be measured calculates the impedance of fuel injector to be measured.
In fuel injector detection system of the present invention, the four wire bridge unit include first resistor, second resistance,
3rd resistor；The fuel injector to be measured and the first resistor be connected in series after with the second resistance, 3rd resistor is in parallel connects
It connects, and the second resistance, 3rd resistor are connected in series；Second control unit is according to impedance transformation voltage and voltage to be measured
And resistance value, the resistance value of second resistance, the resistance value of 3rd resistor of first resistor calculate the resistance of the fuel injector to be measured
It is anti-.
In fuel injector detection system of the present invention, the detection system includes push-button unit, the driving unit
Including multiple driving branches for being connected respectively to multiple and different fuel injectors to be measured；The push-button unit is connected to first control
Unit, and the first control unit is controlled to the multiple driving branch output first respectively according to the input of the push-button unit
Signal processed makes the multiple driving branch output drive signal control corresponding fuel injector injection fuel oil to be measured respectively；Described first
Control unit also according to the input of the push-button unit make the oil pressure cntrol unit to oil pump export second control signal so that
The oil pump provides the fuel oil of preset pressure to the fuel injector or makes the fuel oil in the oil pump emptying observing unit.
In fuel injector detection system of the present invention, the observing unit includes LED illumination lamp, transparent plastic amount
Cup, liquid control valve and fuel oil injector rail fixture, the first control unit make the LED according to the input of the push-button unit
Headlamp shines and the liquid control valve is made to measure distributive value.
In fuel injector detection system of the present invention, the detection system includes motor detection unit, the motor
Detection unit is connected to the first control unit, and the first control unit is according to the input control of the push-button unit
Motor detection unit provides power to the oil pump.
In fuel injector detection system of the present invention, the detection system includes Iiquid detection unit, the liquid
Detection unit is connected to the first control unit, and the first control unit is according to the input control of the push-button unit
The conducting of Iiquid detection unit.
In fuel injector detection system of the present invention, the driving signal is voltage signal or current signal, is used in combination
Fuel oil is sprayed in driving electromagnetic type direct-injection atomizer, CNG/LPG atomizer or multiple spot top spray atomizer；The first control signal
And second control signal is pwm signal.
In fuel injector detection system of the present invention, the physical property detection module further include indicator unit,
Display unit, alarm unit, burning program unit, the indicator unit, display unit, alarm unit and burning program unit
The first control unit is electrically connected.
Fuel injector detection system of the invention is detected when fuel injector to be measured works automatically by electrical characteristic detection module
Resistance value, and judge fuel injector to be measured with the presence or absence of abnormal according to resistance value.Meanwhile fuel injector detection system of the invention passes through
Physical property detection module can detect No. 6 fuel injectors under various operating conditions simultaneously, such as different fuel pressure and injection time
Under the conditions of, the physical performance datas such as the injection fuel atomization effect of fuel injector to be measured, distributive value pass through observation or and normal data
Comparison judges whether fuel injector physical property is normal.Fuel injector detection system of the invention can realize that GDI engine and CNG are started
The integration such as the functional characteristic of fuel injector, electrical characteristic, mechanical property detection, has detection function neat in the life cycle of machine
Entirely, using the features such as easy, application cost is low.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 shows the schematic diagram of the functional module of the fuel injector detection system of the first embodiment of the present invention；
Fig. 2 shows the schematic diagrames of the functional module of the fuel injector detection system of the second embodiment of the present invention；
Fig. 3 shows the circuit diagram of electrical characteristic detection module of the invention；
Fig. 4 shows the circuit diagram of push-button unit of the invention；
Fig. 5 shows the circuit diagram of first control unit of the invention；
Fig. 6 shows the circuit diagram of six driving branches of the invention；
The circuit diagram for the oil pressure cntrol unit of the invention that Fig. 7 is shown；
The circuit diagram for the motor detection unit of the invention that Fig. 8 is shown；
The circuit diagram for the Iiquid detection unit of the invention that Fig. 9 is shown；
The circuit diagram for the indicator unit of the invention that Figure 10 is shown；
The circuit diagram for the display unit of the invention that Figure 11 is shown；
The circuit diagram for the alarm unit of the invention that Figure 12 is shown；
The circuit diagram for the burning program unit of the invention that Figure 13 is shown.
Specific embodiment
In order to keep technical purpose of the invention, technical solution and technical effect apparent, so as to those skilled in the art
Member understands and implements the present invention, and the present invention will be further described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, showing the schematic diagram of the functional module of the fuel injector detection system of first embodiment of the invention.It should
Fuel injector detection system includes physical property detection module 11 and electrical characteristic detection module 12, the physical property detection module
11 and electrical characteristic detection module 12 be connected respectively to fuel injector 13 to be measured.Above-mentioned electrical characteristic detection module 12 is independently of physics
Performance detection module 11, i.e. fuel injector detection system only can carry out physical property detection by physical property detection module 11.
Physical property detection module 11 includes first control unit 112, oil pressure cntrol unit 111, observing unit 114, drives
Moving cell 113；The oil pressure cntrol unit 111 is connected to the first control unit 112 and in the first control unit 112
According to the rated pressure control oil pump fuel feeding of fuel injector 13 to be measured under control.The driving unit 113 is connected to first control
Unit 112 processed simultaneously drives fuel injector 13 to be measured to spray fuel oil under the first control unit 112 control；The observing unit
114 are connected to the first control unit 112, observing unit include LED illumination lamp, transparent plastic measuring cup, liquid control valve and
Fuel oil injector rail fixture, the first control unit make the LED illumination lamp shine in institute according to the input of the push-button unit
It states the lower auxiliary of the control of first control unit 112 and realizes uniformity/sprayability test that fuel injector 13 to be measured sprays, and make described
Liquid control valve measures distributive value.
Electrical characteristic detection module 12 includes reference voltage unit 121, four wire bridge unit 122, ADC AD conversion unit
123, the second control unit 124, the reference voltage unit 121 are connected to the four wire bridge unit 122 and are four line
Electric bridge unit 122 provides high-precision reference voltage source, it is ensured that measurement error；The four wire bridge unit 122 is separately connected described
ADC AD conversion unit 123 and fuel injector to be measured 13 are simultaneously turned the impedance operator of fuel injector 13 to be measured by electric bridge equivalency transform
Voltage to be measured is turned to, and the ADC AD conversion unit 123 converts voltage, the ADC according to the reference voltage computing impedance
AD conversion unit 123 is connected to second control unit 124 and converts electricity to 124 output impedance of the second control unit
Pressure, second control unit 124 calculate the impedance of fuel injector 13 to be measured according to impedance transformation voltage and voltage to be measured.Such as Fig. 2
It is shown, show the schematic diagram of the functional module of the fuel injector detection system of second embodiment of the invention.The fuel injector detection system
System includes physical property detection module 21 and electrical characteristic detection module 22, the physical property detection module 21 and electrical characteristic
Detection module 22 is connected respectively to fuel injector 23 to be measured.Above-mentioned electrical characteristic detection module 22 is independently of physical property detection module
21, i.e. fuel injector detection system only can carry out physical property detection by physical property detection module 11.
Physical property detection module 11 includes first control unit 212, oil pressure cntrol unit 211, observing unit 214, drives
Moving cell 213；The oil pressure cntrol unit 211 is connected to the first control unit 212 and in the first control unit 212
According to the rated pressure control oil pump fuel feeding of fuel injector 23 to be measured under control.The driving unit 213 is connected to first control
Unit 212 processed simultaneously drives fuel injector 23 to be measured to spray fuel oil under the first control unit 212 control；The observing unit
214 are connected to the first control unit 212, observing unit include LED illumination lamp, transparent plastic measuring cup, liquid control valve and
Fuel oil injector rail fixture, the first control unit make the LED illumination lamp shine in institute according to the input of the push-button unit
It states the lower auxiliary of the control of first control unit 212 and realizes uniformity/sprayability test that fuel injector 23 to be measured sprays, and make described
Liquid control valve measures distributive value.
Electrical characteristic detection module 22 includes reference voltage unit 221, four wire bridge unit 222, ADC AD conversion unit
223, the reference voltage unit 221 is connected to the four wire bridge unit 222 and provides height for the four wire bridge unit 222
Precision voltage reference source, it is ensured that measurement error, the four wire bridge unit 222 are separately connected the ADC AD conversion unit 223
And fuel injector 23 to be measured and the impedance operator of fuel injector 23 to be measured is converted to by the ADC AD conversion unit 223 to be measured
Voltage, and the ADC AD conversion unit 223 converts voltage, the ADC analog-to-digital conversion according to the reference voltage computing impedance
Unit 223 is connected to the first control unit 212 and converts voltage and to be measured to 212 output impedance of first control unit
Voltage, the first control unit 212 calculate the impedance of fuel injector 23 to be measured according to impedance transformation voltage and voltage to be measured.It is above-mentioned
Fuel injector detection system detects fuel injector to be measured by using physical property detection module and electrical characteristic detection module automatically
Resistance value and uniformity/sprayability of fuel injector to be measured injection, measurement distributive value, can effectively improve the detection of direct-injection fuel injector
System detection efficiency realizes functional characteristic, electrical characteristic, the machine of fuel injector in GDI engine and the life cycle of CNG engine
The integration detection such as tool characteristic has the characteristics that detection function is complete, low using simplicity, application cost.
As shown in figure 3, being the circuit diagram of fuel injector detection system electrical characteristic detection module.The four wire bridge unit includes
First resistor R1, second resistance R2,3rd resistor R3；The fuel injector Rx to be measured and the first resistor R1 be connected in series after with
The second resistance R2,3rd resistor R3 are connected in parallel, and the second resistance R2,3rd resistor R3 are connected in series.In electric bridge
Both ends apply voltage, according to impedance transformation voltage and voltage to be measured and first resistor R1, second resistance R2 and 3rd resistor R3
Resistance value calculate the impedance Rx of the fuel injector to be measured, wherein the electricity of first resistor R1, second resistance R2 and 3rd resistor R3
Resistance value equal impedance converts voltage and calculates acquisition according to reference voltage into ADC AD conversion unit, and voltage to be measured is that ADC modulus turns
It changes unit and acquisition is converted according to the impedance operator of fuel injector to be measured.
Further, the detection system includes push-button unit, the driving unit include it is multiple be connected respectively to it is multiple
The driving branch of different fuel injectors to be measured；The push-button unit is connected to the first control unit, and first control is single
Member exports first control signal to the multiple driving branch respectively according to the input of the push-button unit, makes the multiple driving
Branch output drive signal controls corresponding fuel injector injection fuel oil to be measured respectively.
Specifically, as shown in figure 4, the circuit diagram of the push-button unit for fuel injector detection system.The push-button unit includes
First input end P1-0, the first output end P1-8, second output terminal P1-9, third output end P1-10, first switch SW1, second
Switch SW2, third switch SW3, the 4th switch SW4, the 5th switch SW5, the 6th switch SW6, the 7th switch SW7, the 8th switch
SW8, the 9th switch SW9；The first switch SW1, the 4th switch SW4, the 7th switch SW7 are connected in series in institute after being connected in parallel
It states between first input end P1-0 and third output end P1-10, the second switch SW2, the 5th switch SW5, the 6th switch SW6
It is connected in series in after being connected in parallel between the first input end P1-0 and the first output end P1-8, the third switch SW3,
Eight switch SW8, the 9th switch SW9 be connected in series in after being connected in parallel the first input end P1-0 and second output terminal P1-9 it
Between；The first input end P1-0, the first output end P1-8, second output terminal P1-9, third output end P1-10 electrically connect respectively
The first control unit is connect, and is opened in first switch SW1, second switch SW2, third switch SW3, the 4th switch SW4, the 5th
Close SW5, the 6th switch SW6, the 7th switch SW7, the 8th switch SW8, when being respectively turned on of the 9th switch SW9, second control
The corresponding pin output control signal of unit processed.
Specifically, as shown in figure 5, being the circuit diagram of first control unit.The 76th pin of first control unit U1 connects
Meet the first input end P1-0 of push-button unit, it is first defeated to be separately connected push-button unit for the 73rd pin, the 72nd pin, the 71st pin
Outlet P1-8, second output terminal P1-9, third output end P1-10.As shown in fig. 6, being the circuit diagram of six driving branches.One
In a embodiment, the driving unit includes six driving branches, input terminal P0-0, P0-1 of six driving branches, P0-2,
P0-3, P0-6, P0-7 are separately connected the 37th pin, the 38th pin, the 79th pin, the 80th pin, of first control unit U1
64 pins, the 63rd pin, and output end INJ1, INJ2, INJ3, INJ4, INJ5, INJ6 of six driving branches respectively with
Corresponding fuel injector connection, driving branch includes light-coupled isolation device and high-power MOS FET device.Pass through operation button unit
Switch, make pin corresponding with first control unit U1 to corresponding driving branch export first control signal, drive branch
According to fuel injector type to be measured to fuel injector output drive signal to be measured, fuel injector is opened to provide required voltage or electric current
Solenoid valve realizes fuel oil injection.Preferably, the driving signal is voltage signal or current signal, and the first control signal is
Pwm signal.
As shown in fig. 7, being the circuit diagram of oil pressure cntrol unit.The input terminal P0-8 connection of the oil pressure cntrol unit described
62nd pin of one control unit makes the 62nd pin of first control unit U1 control institute by the switch of operation button unit
It states oil pressure cntrol unit and exports second control signal to oil pump, so that the oil pump provides the combustion of preset pressure to the fuel injector
Oil.Preferably, the second control signal is pwm signal.
As shown in figure 8, being the circuit diagram of motor detection unit.The detection system includes motor detection unit, the motor
The 61st pin that the input terminal P0-9 of detection unit connects the first control unit is made by the switch of operation button unit
The 61st pin of first control unit U1 controls the motor detection unit and provides power to the oil pump.
As shown in figure 9, being the circuit diagram of Iiquid detection unit.The detection system includes Iiquid detection unit, the liquid
The input terminal P0-10 of detection unit connects the 39th pin of the first control unit U1, by the switch of operation button unit,
The 39th pin of first control unit U1 is set to control the conducting of the Iiquid detection unit.
It as shown in Figure 10, is the circuit diagram of indicator unit.The detection system includes indicator unit, the indicator light list
Member input terminal P0-11, P0-22, P0-25, P0-26, P4-28, P4-29, P1-14, P2-2, P2-3, P2-4, P2-5, P2-6,
P2-7 is separately connected the 40th pin, the 44th pin, the 7th pin, the 6th pin, the 65th pin, of the first control unit U1
68 pins, the 70th pin, the 58th pin, the 55th pin, the 54th pin, the 53rd pin, the 52nd pin, the 51st pin, described
One control unit U1 shines according to corresponding LED of operating condition control instructions lamp unit of said detecting system etc..
It as shown in figure 11, is the circuit diagram of display unit.The detection system includes display unit, the display unit it is defeated
Enter to hold P1-18, P1-19, P1-20, P1-22, P1-23, P1-24, P1-25, P1-26 to be separately connected the of first control unit U1
25 to 32 pins, output end P1-28, P1-29, P2-0, P2-1 of the display unit are separately connected the of first control unit U1
35 pins, the 36th pin, the 60th pin, the 59th pin, the testing result of the display unit real-time display detection system.It is preferred that
Ground, the display unit are digital display.
It as shown in figure 12, is the circuit diagram of alarm unit.The detection system includes alarm unit, the alarm unit it is defeated
Enter to hold the 69th pin of BEEP connection first control unit U1, when abnormal failure occurs in fuel injector, alarm unit is given a warning.
Preferably, which is buzzer.
It as shown in figure 13, is the circuit diagram of burning program unit.The detection system includes burning program unit, the program
Input terminal FLASH_CS1, FLASH_MISO of burning unit are connected respectively to the 48th pin of first control unit U1, the 46th draw
Foot, output end FLASH_SCK, FLASH_MOSI of burning program unit are connected respectively to the 47th of first control unit U1 and draw
Foot, the 45th pin.The function of detection system can be expanded and upgraded by burning program unit.
Above-mentioned fuel injector detection system is single by multiple driving branches, oil pressure cntrol unit, observing unit, the first control
The functional modules such as member, reference voltage unit, four wire bridge unit, the second control unit can detect No. 6 fuel injectors various simultaneously
Under operating condition, such as under the conditions of different fuel pressure and injection time, the injection fuel atomization effect of fuel injector to be measured, distributive value
Equal physical performance datas realize that GDI starts by observing or judging whether fuel injector physical property is normal compared with standard data
The integration such as functional characteristic, electrical characteristic, mechanical property of fuel injector detection, has in the life cycle of machine and CNG engine
Detection function is complete, uses the features such as easy, application cost is low.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of fuel injector detection system, which is characterized in that the detection system includes physical property detection module；The physics
Performance detection module includes first control unit, oil pressure cntrol unit, observing unit, driving unit；The oil pressure cntrol unit
It is connected to the first control unit and is controlled under first control unit control according to the rated pressure of fuel injector to be measured
Oil pump feed or oil extraction；The driving unit is connected to the first control unit and drives under first control unit control
Move fuel injector injection fuel oil to be measured；The observing unit is connected to the first control unit and in the first control unit control
The lower auxiliary of system realizes that uniformity/sprayability of fuel injector injection to be measured tests and measures distributive value.
2. fuel injector detection system according to claim 1, which is characterized in that the detection system includes electrical characteristic inspection
Survey module, and the electrical characteristic detection module include reference voltage unit, four wire bridge unit, ADC AD conversion unit and
Second control unit；The reference voltage unit is connected to the four wire bridge unit and provides base for the four wire bridge unit
Quasi- voltage, the four wire bridge unit are separately connected the ADC AD conversion unit and fuel injector to be measured and by fuel injectors to be measured
Impedance operator be converted to voltage to be measured, and the ADC AD conversion unit converts electricity according to the reference voltage computing impedance
Pressure, the ADC AD conversion unit are connected to second control unit and convert to the second control unit output impedance
Voltage, second control unit calculate the impedance of fuel injector to be measured according to impedance transformation voltage and voltage to be measured.
3. fuel injector detection system according to claim 1, which is characterized in that the detection system includes electrical characteristic inspection
Module is surveyed, and the electrical characteristic detection module includes reference voltage unit, four wire bridge unit and ADC AD conversion unit；
The reference voltage unit is connected to the four wire bridge unit and provides reference voltage for the four wire bridge unit, and described four
Line electric bridge unit is separately connected the ADC AD conversion unit and fuel injector to be measured and converts the impedance operator of fuel injector to be measured
For voltage to be measured, and the ADC AD conversion unit converts voltage, the ADC modulus according to the reference voltage computing impedance
Converting unit is connected to the first control unit and converts voltage, first control to the first control unit output impedance
Unit processed calculates the impedance of fuel injector to be measured according to impedance transformation voltage and voltage to be measured.
4. fuel injector detection system according to claim 2, which is characterized in that the four wire bridge unit includes the first electricity
Resistance, second resistance, 3rd resistor；The fuel injector to be measured and the first resistor be connected in series after with the second resistance, the
The connection of three resistor coupled in parallel, and the second resistance, 3rd resistor are connected in series；Second control unit is according to impedance transformation electricity
The resistance value of pressure and voltage to be measured and first resistor, the resistance value of second resistance, the resistance value of 3rd resistor calculate it is described to
Survey the impedance of fuel injector.
5. fuel injector detection system according to claim 1, which is characterized in that the detection system includes push-button unit,
The driving unit includes multiple driving branches for being connected respectively to multiple and different fuel injectors to be measured；The push-button unit is connected to
The first control unit, and the first control unit is propped up to the multiple driving respectively according to the input of the push-button unit
Road exports first control signal, and the multiple driving branch output drive signal is made to control corresponding fuel injector injection combustion to be measured respectively
Oil；The first control unit makes the oil pressure cntrol unit to the second control of oil pump output also according to the input of the push-button unit
Signal processed is so that the oil pump provides the fuel oil of preset pressure to the fuel injector or makes in the oil pump emptying observing unit
Fuel oil.
6. fuel injector detection system according to claim 5, which is characterized in that the observing unit include LED illumination lamp,
Transparent plastic measuring cup, liquid control valve and fuel oil injector rail fixture, the first control unit are defeated according to the push-button unit
Enter to make the LED illumination lamp to shine and the liquid control valve is made to measure distributive value.
7. fuel injector detection system according to claim 5, which is characterized in that the detection system includes that motor detection is single
Member, the motor detection unit are connected to the first control unit, and the first control unit is according to the push-button unit
Motor detection unit described in input control provides power to the oil pump.
8. fuel injector detection system according to claim 5, which is characterized in that the detection system includes liquid detecting list
Member, the Iiquid detection unit are connected to the first control unit, and the first control unit is according to the push-button unit
The conducting of Iiquid detection unit described in input control.
9. fuel injector detection system according to claim 5, which is characterized in that the driving signal is voltage signal or electricity
Signal is flowed, and for driving electromagnetic type direct-injection atomizer, CNG/LPG atomizer or multiple spot top spray atomizer injection fuel oil；It is described
First control signal and second control signal are pwm signal.
10. fuel injector detection system according to claim 1, which is characterized in that the physical property detection module also wraps
Include indicator unit, display unit, alarm unit, burning program unit, the indicator unit, display unit, alarm unit
The first control unit is electrically connected with burning program unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811025892.5A CN109723591B (en) | 2018-09-04 | 2018-09-04 | Oil sprayer detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811025892.5A CN109723591B (en) | 2018-09-04 | 2018-09-04 | Oil sprayer detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109723591A true CN109723591A (en) | 2019-05-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565661A (en) * | 2021-07-23 | 2021-10-29 | 武汉天富海科技发展有限公司 | Electromagnetic valve drive control device of intelligent electric control booster pump |
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