CN209244713U - A kind of combined type fuel injection camshaft phase and fuel feeding timing detection device - Google Patents
A kind of combined type fuel injection camshaft phase and fuel feeding timing detection device Download PDFInfo
- Publication number
- CN209244713U CN209244713U CN201821823279.3U CN201821823279U CN209244713U CN 209244713 U CN209244713 U CN 209244713U CN 201821823279 U CN201821823279 U CN 201821823279U CN 209244713 U CN209244713 U CN 209244713U
- Authority
- CN
- China
- Prior art keywords
- injection pump
- pressure
- fuel
- toothed disc
- output end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Fuel-Injection Apparatus (AREA)
- Testing Of Engines (AREA)
Abstract
The utility model belongs to diesel engine test technical field, and a kind of of proposition detects compound fuel injection camshaft phase and the device at fuel feeding moment for Fuel Injection Pump Test-Bed, and compound injection pump is combined by injection pump I and injection pump II；The driving end of injection pump I is connected with stepper drive motors output end；The output end of stepper drive motors is equipped with the toothed disc I of hypodontia, I magnetoelectric transducer I of corresponding teeth wheel disc；The toothed disc II of hypodontia is installed between shaft coupling I and the driving end of injection pump I；Corresponding teeth wheel disc II is provided with magnetoelectric transducer II；The output end of injection pump I is connected with the driving end of injection pump II by shaft coupling II, and the output end of injection pump II is equipped with corner marking instrument；The utility model improves the accuracy that Fuel Injection Pump Test-Bed is measured and evaluated to injection pump and fuel injector.
Description
Technical field
The utility model belongs to diesel engine test technical field, specifically describes a kind of for the compound spray of Fuel Injection Pump Test-Bed detection
The device at cam of injection pump axis phase and fuel feeding moment.
Background technique
Injection pump is the most important component of diesel engine, is considered as " heart " component of diesel engine, and injection pump once goes out
Problem can make entire diesel engine work not normal, and the injection pump of High speed and heavy duty diesel engines more than 12 cylinders generally uses multi-cylinder oil spout
Pump by linking together with elastic coupling flexible forms combined type multi-cylinder fuel injection pump, High speed and heavy duty diesel engine with
As the increase of diesel engine speed and load, required fuel delivery increase during test, combined type multi-cylinder fuel injection pump is caused to be held
The load received increases, while the load that each injection pump of combined type multi-cylinder fuel injection pump is born is not fully consistent, elastic coupling joint
Adjustment effect it is limited, the revolving speed that will lead to each injection pump of combined type multi-cylinder fuel injection pump is uneven, causes each fuel injection camshaft
The consistency of phase issues the fuel feeding moment for changing, and then influencing each cylinder of High speed and heavy duty diesel engine.
Traditional Fuel Injection Pump Test-Bed can complete the pretravel tune of the fuel delivery detection of single multi-cylinder fuel injection pump, injection pump
The functions such as whole, injection pump and the detection of fuel injector oil mass inhomogeneities.But since the limitation of functions of the equipments makes it to can not carry out
The function of the detection of combined type multi-cylinder fuel injection pump camshaft phase and the test of fuel feeding moment, can not pass through combined type multi-cylinder fuel injection pump
Camshaft phase difference, the difference of oil injection time are further analyzed injection pump after shaft coupling links together.
Utility model content
The utility model to solve the above-mentioned problems, purpose be to provide and a kind of detect compound oil spout for Fuel Injection Pump Test-Bed
Pump camshaft phase and the device and method at fuel feeding moment.
For up to the above purpose of utility model, the utility model adopts the following technical solution:
It is a kind of to detect compound fuel injection camshaft phase and the device at fuel feeding moment, compound injection pump for Fuel Injection Pump Test-Bed
It is combined by injection pump I and injection pump II；The driving end of the injection pump I is exported by shaft coupling I and stepper drive motors
End is connected；The output end of the stepper drive motors is equipped with the toothed disc I of hypodontia, and the corresponding toothed disc I is arranged useful
With to stepper drive motors output end revolving speed and phase signal carry out detection magnetoelectric transducer I；The shaft coupling I and injection pump
The toothed disc II of hypodontia is installed between I driving end；Structure of the structure of toothed disc II with the toothed disc I；Described in correspondence
Toothed disc II be provided with to detect injection pump I drive end revolving speed and phase signal magnetoelectric transducer II；The oil spout
The output end of pump I is connected with the driving end of injection pump II by shaft coupling II, and the output end of the injection pump II is equipped with footmark
Instrument, to detect the revolving speed and phase signal of II output end of injection pump；The injection pump I, injection pump II top be provided with
Multiple delivery valves, each delivery valve pass through corresponding high-pressure oil pipe respectively and are connected with fuel injector；High-pressure oil pipe with
The pressure measurement connector I being connected with high-pressure oil pipe is installed between corresponding delivery valve, and is connect in the pressure measurement
Pressure sensor I to detect high pressure oil tube pump end tubing pressure is installed on first I；High-pressure oil pipe and corresponding fuel injector
Between the pressure measurement connector II being connected with high-pressure oil pipe is installed, and install on the pressure measurement connector II useful
To detect the pressure sensor II of high-pressure oil pipe nozzle end tubing pressure；The magnetoelectric transducer I, magnetoelectric transducer II with
It is connected with pressure sensor I, pressure sensor II and host computer, and carries out synchronous acquisition;By comparison motor output end,
Injection pump I drives the consistency of end, II output end revolving speed of injection pump and phase signal to judge two practical connection status of injection pump
Under it is each pump camshaft phase equalization.
Corresponding each fuel injector is provided with the measuring cup to measure fuel injector distributive value.
The rack gear of the injection pump I and injection pump II links together, and passes through rack regulating device
Control rack stroke；The rack regulating device is mounted on I input terminal of injection pump, and the rack gear of stretching passes through fixed branch
The adjustment hole of frame, and pass through the clamping nut stationary rack elongation before and after adjustment hole；Being determined as of the rack gear amount of being stretched into draws high shape
The rack gear length of state adjustment hole front end subtracts the rack gear length of free state adjustment hole front end.
The utility model proposes one kind detect compound fuel injection camshaft phase and fuel feeding moment for Fuel Injection Pump Test-Bed
Device, can realize the detection of fuel injector atomization quality, the flow detection of fuel injector, fuel injector oil mass by adopting the above technical scheme not
The functions such as uniformity detection, and can realize combined type injection pump different rotating speeds, different rack stroke inspections under actual working state
Survey the phase equalization of each fuel injection camshaft, high pressure oil tube pump end, mouth end pressure consistency；Extend equipment uses model
It encloses, improves the accuracy that Fuel Injection Pump Test-Bed is measured and evaluated to injection pump and fuel injector.
Detailed description of the invention
Fig. 1 is that combined type injection pump is installed to the schematic diagram on Fuel Injection Pump Test-Bed:
Fig. 2 is toothed disc structural schematic diagram:
Fig. 3 is the A-A cross-sectional view of Fig. 2；
Fig. 4 is rack stroke regulating device schematic diagram:
Fig. 5 is pump end pressure curve synoptic diagram；
Fig. 6 is mouth end pressure curve synoptic diagram.
In figure: 1, stepper drive motors, 2, toothed disc I, 3, shaft coupling I, 4, toothed disc II, 5, injection pump I, 6, shaft coupling
II, 7, injection pump II, 8, corner marking instrument, 9, high-pressure oil pipe, 10, pressure measurement connector I, 11, pressure measurement connector II, 12, oil spout
Device, 13, measuring cup, 14, sliding rail, 15, magnetoelectric transducer II, 16, magnetoelectric transducer I, 17, host computer, 18, pressure sensor I,
19, pressure sensor II, 21, rack regulating device, 22, delivery valve, 23, fixed bracket, 24, front end rack gear, 25, compression spiral shell
Cap.
Specific embodiment
Specific embodiment shown in the utility model is described in detail below with reference to attached drawing, those skilled in the art
Some nonessential modifications and adaptations of the member according to the content of the present invention to the utility model, still fall within the utility model.
As shown in Figure 1, a kind of detect compound fuel injection camshaft phase and the device at fuel feeding moment for Fuel Injection Pump Test-Bed,
Compound injection pump is combined by injection pump I 5 and injection pump II 7；The driving end of the injection pump I 5 passes through shaft coupling I 3 and step
It is connected into 1 output end of driving motor；The output end of the stepper drive motors 1 is equipped with the toothed disc I 2 of hypodontia, it is corresponding described in
Toothed disc I 2 be provided with to stepper drive motors output end revolving speed and phase signal carry out detection magnetoelectric transducer I
16；The toothed disc II 4 of hypodontia is installed between the shaft coupling I 3 and the driving end of injection pump I 5；The structure of toothed disc II 4 is same
The structure of the toothed disc I 2；Toothed disc II 4, the structure of toothed disc I 2 are as shown in Figure 2 and Figure 3；The corresponding toothed disc II 4
It is provided with and drives the revolving speed at end and the magnetoelectric transducer II 15 of phase signal to detect injection pump I；The injection pump I 5 it is defeated
Outlet is connected with the driving end of injection pump II 7 by shaft coupling II 6, and the output end of the injection pump II 7 is equipped with corner marking instrument 8,
To detect the revolving speed and phase signal of II 7 output end of injection pump；The injection pump I 5, injection pump II 7 top be provided with
Multiple delivery valves 22, each delivery valve 22 are connected by corresponding high-pressure oil pipe 9 with fuel injector 12 respectively；In high pressure
The pressure measurement connector I 10 being connected with high-pressure oil pipe is installed, and described between oil pipe 9 and corresponding delivery valve 22
Pressure sensor I 18 to detect high pressure oil tube pump end tubing pressure is installed on pressure measurement connector I；High-pressure oil pipe and institute
The pressure measurement connector II 11 being connected with high-pressure oil pipe is installed between corresponding fuel injector, and is connect in the pressure measurement
Pressure sensor II 19 to detect high-pressure oil pipe nozzle end tubing pressure is installed on first II；The magnetoelectric transducer I
16, magnetoelectric transducer II 15, pressure sensor I 18, pressure sensor II 19 are connected with host computer 17, and the magnetoelectricity passes
Sensor I 16, magnetoelectric transducer II 15 are for measuring toothed disc I 2, the revolving speed of toothed disc II 4 and phase signal and and pressure sensing
Device I 10, pressure sensor II 11 are connected with host computer 17, and carry out synchronous acquisition.By comparing 1 output end of motor, oil spout
The consistency for pumping I 5 driving ends, II 7 output end revolving speed of injection pump and phase signal judges under two practical connection status of injection pump
The phase equalization of each pump camshaft.
Corresponding each fuel injector is provided with the measuring cup to measure fuel injector distributive value.
As shown in figure 4, the rack gear of the injection pump I and injection pump II links together, controlled by rack regulating device 21
Rack stroke processed;The rack regulating device 21 is mounted on I 5 input terminal of injection pump, and the front end rack gear 24 of stretching passes through fixed branch
The adjustment hole of frame 23, and pass through the 25 stationary rack elongation of clamping nut before and after adjustment hole.The rack gear amount of being stretched into is determined as drawing
The rack gear length for rising status adjustment hole front end subtracts the rack gear length of free state adjustment hole front end.
Compound fuel injection camshaft phase and the device at fuel feeding moment are detected to compound for Fuel Injection Pump Test-Bed using a kind of
The method that fuel injection camshaft phase and fuel feeding moment are detected are as follows: water, oil needed for Fuel Injection Pump Test-Bed test is completed in connection
The correlation corollary equipment such as road, the grating base position of toothed disc I 2, the edentulous site of toothed disc II 4 and corner marking instrument 8 is adjusted
To same angle.Start stepper motor 1, setting measurement revolving speed and recurring number.Rack gear row is arranged in adjusting gear rack regulating device 21
Journey.Use magnetoelectric transducer I 16, magnetoelectric transducer II 15, angle under 17 synchronous acquisition different rotating speeds of host computer, different rack strokes
Revolving speed and phase signal that instrument 8 measures are marked, with the grating benchmark of toothed disc 2, the edentulous site of toothed disc II 4 and corner marking instrument 8
On the basis of position, analysis stepper motor 1, high-pressure oil pipe I 5 and every turn one of injection pump II 7 under different rotating speeds, different rack strokes
The consistency for enclosing revolving speed and phase signal, judges combined type injection pump high-pressure oil pipe I 5 and injection pump II under actual installation state
The consistency of 7 camshaft phases;Judgment method: by the edentulous site tune of toothed disc I 2, toothed disc II 4 and corner marking instrument 8 before test
Whole to start Fuel Injection Pump Test-Bed to same position, revolving speed is fixed to 900r/min.Assuming that the number of teeth of toothed disc I 2, toothed disc II 4 is
90 lack 1 teeth, and the grating quantity of corner marking instrument 8 is 720 to lack 1, toothed disc I 2, toothed disc II 4 by magnetoelectricity magnetoelectric transducer I 16,
The signal that magnetoelectric transducer II 15 obtains is dextrorotation signal, and a tooth is a dextrorotation signal, and a circle should occur 90 and lack 1, angle
The signal that mark instrument 8 obtains is square-wave signal, and a circle should occur 720 and lack 1.The square-wave signal of one corner marking instrument is toothed disc I 2, tooth
Eight times of the dextrorotation signal of wheel disc II 4, toothed disc I 2 is identical with II 4 number of teeth of toothed disc, therefore when stepper drive motors 1 export
When end, injection pump I 5 drive end, II 7 output end revolving speed of injection pump and identical phase signal, in addition to edentulous site, when toothed disc I 4
When collecting a dextrorotation signal, toothed disc II 4 also should just collect a dextrorotation signal, and corner marking instrument 8 just collects 8
Square-wave signal.When the dextrorotation signal that toothed disc II 4 is collected is extra or less than one, it is believed that its revolving speed increases or subtracts
It is small, and record time difference.When the square-wave signal that corner marking instrument 8 is collected is extra or less than 8, it is believed that its revolving speed liter
High or reduction, records time difference.Obtain 1 output end of stepper drive motors, injection pump I 5 drives end, II 7 output end of injection pump
Shafting revolves the consistency for each position revolving speed that turns around.1 output end of stepper drive motors, injection pump I 5 are driven into end, injection pump II 7
The tach signal of output end converts long angular domain signal, and toothed disc I 2, toothed disc II 4 and corner marking instrument 8 exist when inconsistent according to revolving speed
In rotation is turned around, toothed disc I 2, toothed disc II 4 in each dextrorotation signal and the time difference between corner marking instrument 8 calculate phase
Angular difference.Obtain 1 output end of stepper drive motors, injection pump I 5 drives end, the rotation of II 7 output end shafting of injection pump turns around everybody
Set the consistency at phase angle;
Pass through the revolving speed of the injection pump II 7 detected of corner marking instrument 8, the letter of pressure sensor I 18 and pressure sensor II 19
Number, it obtains using II angular signal of injection pump as the high pressure oil tube pump end of abscissa, mouth side pressure force curve, wherein angular signal is logical
The revolving speed for crossing corner marking instrument 8 obtains, and corner marking instrument is 720 scarce 1 gratings, and a circle 720 lacks 1 square-wave signal, each square-wave signal generation
Table 0.5deg before test, determines 8 edentulous site of corner marking instrument and injection pump I 5 and each 22 position camshaft of delivery valve of injection pump II 7
The angle of top dead center position starts Fuel Injection Pump Test-Bed, measurement high pressure oil tube pump end, mouth side pressure force curve and corner marking instrument revolving speed letter
Number.The tach signal of corner marking instrument 8 is converted into angle signal, using angle signal as abscissa, pressure value as ordinate,
Oil-line pump end, mouth side pressure force data are imported, is formed using II angular signal of injection pump as the high pressure oil tube pump end of abscissa, mouth side pressure
Force curve.
There is a fixed fuel-displaced cracking pressure for the delivery valve 22 of each injection pump, it is assumed that cracking pressure is
400bar reaches for the first time when recording injection pump I 5 and the rising of all high pressure oil tube pump end pressure curve left pressures of injection pump II 7
Difference to the corresponding crank angle numerical value of 400bar, and between calculating, difference are each of injection pump I 5 and injection pump II 7
The actual fuel injection angular interval of delivery valve has theoretical injection interval angle for injection pump I and injection pump II, compares actual fuel injection interval
Angle and theoretical injection interval angular difference can determine whether each 22 oil spout start-up time consistency of delivery valve of injection pump.Also according to injection pump
I 5 and the fuel-displaced closing pressure of II 7 delivery valve of injection pump 22 obtain corresponding crank angle numerical value, calculate the fuel-displaced closing of delivery valve 22
Crank angle difference between the crank angle numerical value and the fuel-displaced cracking pressure crank angle numerical value of delivery valve 22 of pressure, is sprayed
The oil injection duration of oil pump I 5 and each delivery valve 22 of injection pump II 7 compares injection pump I 5 and each 22 oil spout of delivery valve of injection pump II 7
The consistency of duration judges the one of injection pump I 5 and each 22 position oil injection duration of delivery valve of all injection pumps of injection pump II 7
Cause property, injection pressure and oil injection time data, judge the consistency of each fuel-displaced valve position injection pressure of all injection pumps, phase.
All parts are completed after installing, the correlation such as water, oil circuit needed for connecting completion Fuel Injection Pump Test-Bed test, which is matched, to be arranged
It is standby, determine the angle of the last one delivery valve camshaft upper dead center position of the grating base position Yu injection pump II 7 of corner marking instrument 8
Difference determines high-pressure oil pipe I 5 and each delivery valve of injection pump II 7 relative to the last one the delivery valve camshaft top dead-centre of injection pump II 7
The differential seat angle of position.Start stepper motor 1, setting measurement revolving speed and recurring number.Rack gear row is arranged in adjusting gear rack regulating device 21
Journey.Using 17 synchronous acquisition different rotating speeds of host computer, the revolving speed of 8 measurement of different rack stroke subscript instrument and phase signal and
Pressure sensor I 18, the measurement of pressure sensor II 19 obtain pump end, mouth side pressure force data;To guarantee measurement accuracy and accuracy,
When being detected to the high-pressure oil pipe 9 of high-pressure oil pipe I 5 and each 22 position of delivery valve of injection pump II 7, synchronize to I 5 He of high-pressure oil pipe
All high pressure oil tube pumps end that injection pump II 7 is connected, mouth end pressure measure.Magnetoelectric transducer I 16, magnetoelectric transducer II
15, revolving speed and phase signal that corner marking instrument 8 measures, with the grating of toothed disc 2, the edentulous site of toothed disc II 4 and corner marking instrument 8
On the basis of base position, analysis stepper motor 1, high-pressure oil pipe I 5 and injection pump II 7 under different rotating speeds, different rack strokes is every
Turn around the consistency of revolving speed and phase signal, judges combined type injection pump high-pressure oil pipe I 5 and oil spout under actual installation state
Pump the consistency of II 7 camshaft phases.It is different at fuel injector 12 being changed without to obtain high-pressure oil pipe I 5 and injection pump II 7
The high-pressure oil pipe 9 based on angular signal pumps end, mouth side pressure force curve under revolving speed, different rack strokes；As shown in Figure 5 and Figure 6, scheme
5 be the high pressure oil tube pump end curve based on angular signal, Fig. 6 be the high pressure oil nipple end curve based on angular signal, this two
Curve is using the angular signal of injection pump II as abscissa, using pressure value as ordinate.
Delivery valve 22 each under same rotational speed, identical rack stroke corresponding high-pressure oil pipe 9 pump end, mouth side pressure force curve is every
The corresponding corner numerical value removal angular interval of a pressure value point compares, while being pressed according to 22 cracking pressure of delivery valve and closing
Power obtains delivery valve start-up time, finish time and duration;Analysis high-pressure oil pipe I 5 and each delivery valve 22 of injection pump II 7 go out
The consistency of fuel oil meter rule.
Replacement different type fuel injector is tested, and is obtained high-pressure oil pipe I 5 and injection pump II 7 and is being replaced various fuel injectors
In the case where high pressure oil tube pump end under different rotating speeds, different rack stroke based on angular signal, mouth side pressure force curve.
Delivery valve 22 each under same rotational speed, identical rack stroke corresponding high-pressure oil pipe 9 pump end, mouth side pressure force curve is every
The corresponding corner numerical value removal angular interval of a pressure value point compares, while being pressed according to 12 cracking pressure of fuel injector and closing
Power obtains 12 start-up time of fuel injector, finish time and duration.Analyze the consistency of each 12 fuel injection characteristic of fuel injector.
During above-mentioned test, each 12 end of fuel injector is equipped with measuring cup 13, can analyze in different rotating speeds, different rack gear rows
The consistency of II 7 delivery valve oil mass of high-pressure oil pipe I 5 and injection pump under journey.
Corner marking instrument used by this combined type fuel injection camshaft phase and fuel feeding timing detection device and method is Lee AVL
The 365C of Si Te test equipment Co., Ltd.
Claims (3)
1. a kind of detect compound fuel injection camshaft phase and the device at fuel feeding moment for Fuel Injection Pump Test-Bed, it is characterised in that:
Compound injection pump is combined by injection pump I and injection pump II；It is driven by shaft coupling I and stepping at the driving end of the injection pump I
Dynamic motor output end is connected；The output end of the stepper drive motors is equipped with the toothed disc I of hypodontia, the corresponding toothed disc
I be provided with to stepper drive motors output end revolving speed and phase signal carry out detection magnetoelectric transducer I；The shaft coupling
The toothed disc II of hypodontia is installed between I and the driving end of injection pump I；Structure of the structure of toothed disc II with the toothed disc I；
The corresponding toothed disc II, which is provided with, drives the revolving speed at end and the magnetoelectric transducer II of phase signal to detect injection pump I；
The output end of the injection pump I is connected with the driving end of injection pump II by shaft coupling II, the output end peace of the injection pump II
Equipped with corner marking instrument；The injection pump I, injection pump II top be provided with multiple delivery valves, each delivery valve leads to respectively
Corresponding high-pressure oil pipe is crossed to be connected with fuel injector；It is equipped between high-pressure oil pipe and corresponding delivery valve and high pressure oil
The pressure measurement connector I that pipe is connected, and be equipped on the pressure measurement connector I to detect high pressure oil tube pump end oil
The pressure sensor I of pipe pressure；The pressure being connected with high-pressure oil pipe is installed between high-pressure oil pipe and corresponding fuel injector
Connector II is measured, and the pressure to detect high-pressure oil pipe nozzle end tubing pressure is installed on the pressure measurement connector II
Force snesor II；The magnetoelectric transducer I, magnetoelectric transducer II with pressure sensor I, pressure sensor II and upper
Machine is connected.
2. as described in claim 1 a kind of compound fuel injection camshaft phase and fuel feeding moment are detected for Fuel Injection Pump Test-Bed
Device, it is characterised in that: corresponding each fuel injector is provided with the measuring cup to measure fuel injector distributive value.
3. as described in claim 1 a kind of compound fuel injection camshaft phase and fuel feeding moment are detected for Fuel Injection Pump Test-Bed
Device, it is characterised in that: the rack gear of the injection pump I and injection pump II links together, and controls tooth by rack regulating device
Stroke；The rack regulating device is mounted on I input terminal of injection pump, and the rack gear of stretching passes through support bracket fastened adjustment hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821823279.3U CN209244713U (en) | 2018-11-07 | 2018-11-07 | A kind of combined type fuel injection camshaft phase and fuel feeding timing detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821823279.3U CN209244713U (en) | 2018-11-07 | 2018-11-07 | A kind of combined type fuel injection camshaft phase and fuel feeding timing detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209244713U true CN209244713U (en) | 2019-08-13 |
Family
ID=67527253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821823279.3U Active CN209244713U (en) | 2018-11-07 | 2018-11-07 | A kind of combined type fuel injection camshaft phase and fuel feeding timing detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209244713U (en) |
-
2018
- 2018-11-07 CN CN201821823279.3U patent/CN209244713U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109139323A (en) | A kind of combined type fuel injection camshaft phase and fuel feeding timing detection device and method | |
| CN100343502C (en) | Common-rail fuel oil injection system injector failure diagnosing method | |
| US4277830A (en) | Diagnosis of engine turbocharger performance | |
| EP1972780A1 (en) | Vehicle diagnosis system and method | |
| CN113431680B (en) | Full-period acquisition and instantaneous speed calculation method of engine monitoring signals based on tooth pulse of tooth-lacking fluted disc | |
| CN102072064A (en) | Engine fuel supply advance angle measuring system and measuring method | |
| CN209244713U (en) | A kind of combined type fuel injection camshaft phase and fuel feeding timing detection device | |
| CN105910828B (en) | A kind of circulation polar diagram diagnostic method of multi-cylinder diesel engine combustion failure | |
| CN113670242A (en) | Measuring device and method for quickly measuring top dead center deviation of piston | |
| RU2455519C1 (en) | Testing method of high pressure instruments of fuel system of diesel on operating engine, and device for its implementation | |
| CN208140031U (en) | A kind of roller pumping unit displacement acquisition device | |
| CN103590915A (en) | Method for measuring and calculating cycle fuel injection quantity of diesel through fuel pressure in real time | |
| RU2648175C1 (en) | High pressure fuel pump testing device | |
| RU2313689C1 (en) | Method to determine angle of commencement of fuel injection by nozzle | |
| CN208921042U (en) | Precise measurement crankshaft of diesel engine dead-center device | |
| CN105737750A (en) | Method and apparatus for measuring arm span of ship diesel engine based on photoelectric encoder and laser range finding sensor | |
| CN202266356U (en) | Microcomputer high-precision gauging digital-display oil injection pump test bed | |
| CN103670862B (en) | A kind of diesel engine fuel injecting timing detection method based on AT89C52 single-chip microcomputer | |
| CN110160799A (en) | Timing mark circuit for determining oil injection time of diesel engine | |
| CN108519237B (en) | Test system for measuring inflation efficiency of each cylinder of multi-cylinder internal combustion engine | |
| CN115288903B (en) | Working method of vehicle-mounted oil consumption detection equipment calibration device | |
| CN209115239U (en) | A kind of fuel injection pump tester detection system | |
| US20240200504A1 (en) | Systems and methods of fuel injection timing drift detection and compensation | |
| CN113803184B (en) | Method for detecting whether pressure limiting valve is clamped at closed position | |
| RU2429373C1 (en) | Test bench for diesel engine fuel hardware |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |