CN209115238U - Marine low speed diesel engine Cylinder lubricating system test platform - Google Patents
Marine low speed diesel engine Cylinder lubricating system test platform Download PDFInfo
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- CN209115238U CN209115238U CN201821791772.1U CN201821791772U CN209115238U CN 209115238 U CN209115238 U CN 209115238U CN 201821791772 U CN201821791772 U CN 201821791772U CN 209115238 U CN209115238 U CN 209115238U
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Abstract
The utility model discloses a kind of marine low speed diesel engine Cylinder lubricating system test platforms, including oil syringe servo oil system, industrial personal computer, oil syringe test TT&C system and corner signal generating device；Corner signal generating device is for simulating crankshaft of diesel engine corner and top dead centre；Oil syringe servo oil system is used to run the servo-fluid pressure oil provided for oil syringe, and measures the distributive value of oil syringe；Oil syringe tests TT&C system and is used to show each physical quantity according to the physical quantity in test instruction acquisition oil syringe injection process, store and be sent to industrial personal computer；Industrial personal computer is for issuing test instruction and driving signal.The utility model can carry out the test such as oil syringe performance test, oil syringe exfactory inspection test, oil syringe reliability, Consistency test, oil syringe solenoid valve control, have the advantages that integrated level is high, highly reliable, intelligent level is high, easy to remove.
Description
Technical field
The utility model relates to internal-combustion engine engineering technical fields, in particular to a kind of marine low speed diesel engine Cylinder lubricating system
System test platform.
Background technique
Oil syringe is as one of the critical component in common rail for diesel engine formula electronic control cylinder injection system, to marine diesel
Cylinder lubrication performance has great influence.The tests such as performance evaluation and the driving current control of oil syringe product (exemplar) need
Oil syringe comprehensive performance test bed (hereinafter referred to as testing stand) measures analysis, analyzes oil syringe control parameter to its entirety
The consistency of performance and reliability of oil syringe are evaluated in the influence of performance, verify the control strategy of oil syringe, and measurement result can be made
For the foundation of exfactory inspection.Development experiments platform is that technical foundation is established in the marine low-speed engine real machine application of oil syringe.
Tradition, which tests oil syringe, will often carry out multiple independent test, and whether test oil syringe various aspects of performance
It meets the requirements, test period is long, is unfavorable for shortening the oil syringe development cycle and improves test reliability.
Summary of the invention
Purpose of the utility model is to solve deficiencies existing for above-mentioned background technique, and propose a kind of integrated level it is high,
Marine low-speed machine cylinder of diesel engine injection system test platform highly reliable, easy to remove.
To achieve the above object, marine low speed diesel engine Cylinder lubricating system test platform designed by the utility model,
Including for simulating crankshaft of diesel engine corner and top dead centre Shaft angle signal generation apparatus, for issue test instruction and driving
The industrial personal computer of signal, for according to test instruction acquisition oil syringe injection process in physical quantity oil syringe test TT&C system and
Oil syringe servo oil system；It is characterized by: the oil syringe servo oil system includes cylinder oil circuit, servo oil circuit and note
Oil measurement device, the cylinder oil circuit include sequentially connected cylinder fuel tank, cylinder oil service pump, cylinder filter, the cylinder filter
The outlet of device is connected with the import of oil syringe；The servo oil circuit includes sequentially connected servo fuel tank, servo filter, servo oil
Pump, servo oil rail, servo oil rail are connected by solenoid valve with the import of oil syringe, and the cylinder oil service pump, servo oil pump are led to respectively
Variable-frequency motor engagement driving is crossed, the solenoid valve passes sequentially through driving circuit for electromagnetic valve, capture card and industry control mechatronics.
Further, the oil syringe test TT&C system includes the sensor for acquiring various physical quantitys and sensor
The signal conditioning module of output end connection, the output end of the signal conditioning module connect with capture card, the capture card it is defeated
Outlet is connect with industrial personal computer.
Further, the corner signal generating device drives the axis of fluted disc by the servo motor with frequency converter
Crank rotation is simulated to realize.
Further, the import of the servo oil pump is connect with filter outlets, the outlet connection servo oil of servo oil pump
The outlet of the import of rail and servo oil pressure regulating valve, servo oil pressure regulating valve is connect with servo fuel tank, on servo fuel tank also
Equipped with safety valve, accumulator is provided on servo oil rail.
Further, the oiling measuring device includes bracket, and catchment cup, the oil-collecting are provided on the bracket
The upper end of cup and the jet of oil syringe connect, and lower end is connected to the first oil conducting tube, the second oil conducting tube respectively by oil guide pipe, institute
It states and is provided with weighing cup body below the outlet of the first oil conducting tube, the weighing cup body is set to above weighing device and lifting jack,
The outside of the weighing cup body is equipped with service tank, is equipped with the oil well pump and oil drain pump being attached thereto outside the service tank,
The entrance of the oil well pump protrudes into the first oil conducting tube intracavity bottom by conduit；Graduated cylinder is provided with below second oil conducting tube
Bogey is provided with oil-break disk between graduated cylinder bogey and the second oil conducting tube, between weighing cup body and the first oil conducting tube,
The oil-break disk slant setting, low side are placed in the top of funnel, and the lower section of funnel is opposite with the draw-off tray being set on bracket.
Further, the sensor includes servo oil pump speed probe, servo oil pump outlet pressure sensor, watches
Take fuel pump outlet temperature sensor, cylinder oil service pump speed probe, cylinder oil service pump outlet pressure sensor, cylinder oil service pump outlet temperature
Spend sensor, oil syringe main plunger displacement signal sensor, oil syringe pilot valve position sensor, oiling quantity sensor, note
Oily device side pressure force snesor, steam cylinder oil rail temperature sensor, servo oil rail pressure sensor, is watched steam cylinder oil rail pressure sensor
Take oily rail temperature sensor, crank angle generating device speed probe.
Utility model has the advantages that
(1) the developed test platform of the utility model can satisfy the test request of oil syringe exfactory inspection, have collection
At high, highly reliable, the easy to remove advantage of degree.
(2) the utility model can carry out oil syringe performance test, oil syringe exfactory inspection test, oil syringe reliability,
Consistency test, oil syringe solenoid valve control are tested, servo oil pump is tested, automatically controlled gas is tested and provided to " engine speed "
The physical varification test platform of cylinder injection system industrial personal computer control strategy.
(3) distributive value that the utility model passes through setting oiling measuring device precise measurement oil syringe to be detected.
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model marine low speed diesel engine Cylinder lubricating system test platform.
Fig. 2 is oil syringe servo oil system in the utility model marine low speed diesel engine Cylinder lubricating system test platform
Structural schematic diagram.
Fig. 3 is the structural schematic diagram of oiling measuring device in the utility model.
In figure: bracket 1, catchment cup 2, oil guide pipe 3, the first oil conducting tube 4, the second oil conducting tube 5, cup body 6 of weighing, weighing dress
Set 7, lifting jack 8, service tank 9, oil well pump 10, oil drain pump 11, graduated cylinder bogey 12, oil-break disk 13, funnel 14, draw-off tray
15, jet 16.
Fig. 4 is that oil syringe tests TT&C system in the utility model marine low speed diesel engine Cylinder lubricating system test platform
Sensor distribution schematic diagram.
Fig. 5 is the external structure schematic diagram of the utility model marine low speed diesel engine Cylinder lubricating system test platform.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
On marine low speed diesel engine Cylinder lubricating system testing testing stand, oil syringe is testing experiment object.Oil syringe
It is in the same oil syringe servo oil system with solenoid valve, the work pressure of solenoid valve is established by this hydraulic power source system
Power.When the work of driving circuit for electromagnetic valve drive magnetic valve, solenoid-driven oil syringe simulates marine low speed diesel engine oil syringe
Oiling process.
As shown in Figure 1, the utility model proposes a kind of marine low speed diesel engine Cylinder lubricating system test platform, including
Oil syringe servo oil system, industrial personal computer, oil syringe test TT&C system and corner signal generating device.
Corner signal generating device is for simulating crankshaft of diesel engine corner and top dead centre, by top dead centre signal, crankshaft
Position signal, tach signal are sent to industrial personal computer and oil syringe test TT&C system.Corner signal generating device passes through band
The Axle mould of the servo motor driving fluted disc of frequency converter is intended crank rotation and is realized.Corner signal and top dead centre signal are automatically controlled systems
The reference signal of system (third party ECU), marine low speed diesel engine is the crankangle marker assembly (light by being mounted on free end
Photoelectric coder) or be mounted on flywheel fluted disc generate corner signal.Oil syringe test platform for comprehensive performance is quasi- to select band to become
The Axle mould of the servo motor driving fluted disc of frequency device intends crank rotation (0r/min~200r/min), mountable absolute type photoelectric coding
Device or multiple groups close toothed disc and provide corner signal for diesel engine electric control system and testing bench control system, and as testing stand
The reference signal of TT&C system synchronous acquisition and control.
Oil syringe servo oil system is used to be that oil syringe runs the servo-hydraulic provided according to the driving signal of industrial personal computer
Oil, and measure the distributive value of oil syringe.As shown in Fig. 2, oil syringe servo oil system includes cylinder oil circuit, servo oil circuit and note
Oil measurement device.Cylinder oil circuit includes sequentially connected cylinder fuel tank, cylinder oil service pump, cylinder filter, the outlet of cylinder filter
It is connected with the import of oil syringe.Servo oil circuit includes sequentially connected servo fuel tank, servo filter, servo oil pump, servo oil rail.
Servo oil rail is connected by solenoid valve with the import of oil syringe, and cylinder oil service pump, servo oil pump are engaged by variable-frequency motor drive respectively
Dynamic, solenoid valve passes sequentially through driving circuit for electromagnetic valve, capture card and industry control mechatronics.The import of servo oil pump and filter outlets
Connection, the import of outlet connection the servo oil rail and servo oil pressure regulating valve of servo oil pump, servo oil pressure regulating valve go out
Mouth is connect with servo fuel tank, and safety valve is additionally provided on servo fuel tank, is provided with accumulator on servo oil rail.
Servo oil rail keeps the stabilization of pressure, provides test job pressure for oil syringe.The outlet of plunger pump of oil syringe connects
Connect servo oil rail.Variable-frequency motor driving axial plunger pump gives pressure oil to servo oil rail, which is adjusted by servo oil pressure
Valve is adjusted.If oil pressure be more than allowable pressure, servo oil pressure regulating valve can draining return servo oil fuel tank, to guarantee system
Reliably working.
Cylinder oil service pump and servo oil pump use WRY65-50-180 crescent gear pump oil pump, discharge capacity 15L/min, specified
Pressure is 31.5MPa, working speed 1500r/min.
Accumulator uses NXQ-A-16 model, swept volume 16L.
Variable-frequency motor uses Siemens's threephase asynchronous machine, voltage rating 220V, rated power 7.5KW.
For driving circuit for electromagnetic valve for driving oil syringe to act and demarcate the electrically driven parameter of oil syringe, principle is electric current
Sampling section acquires current signal；The current signal of output loop is acquired, and compared with the current signal of setting, to two signals
Between error amplify, by amplified error signal be given to voltage pulse control chip, voltage pulse control chip pass through
Change the voltage duty cycle of output to change output electric current, until error meets the requirements between the electric current of output and the electric current of setting.
As shown in figure 3, oiling measuring device includes bracket 1, catchment cup 2, the upper end of catchment cup 2 are provided on bracket 1
It being connect with the jet 16 of oil syringe, lower end is connected to the first oil conducting tube 4, the second oil conducting tube 5 respectively by oil guide pipe 3, and first
Weighing cup body 6 is provided with below the outlet of oil conducting tube 4, weighing cup body 6 is set to 8 top of weighing device 7 and lifting jack, cup of weighing
The outside of body 6 is equipped with service tank 9, is equipped with the oil well pump 10 and oil drain pump 11 being attached thereto, oil well pump 10 outside service tank 9
Entrance 4 intracavity bottom of the first oil conducting tube is protruded by conduit；The lower section of second oil conducting tube 5 is provided with graduated cylinder bogey 12,
It is provided with oil-break disk 13 between graduated cylinder bogey 12 and the second oil conducting tube 5, between weighing cup body 6 and the first oil conducting tube 4, is broken
13 slant setting of food tray, low side are placed in the top of funnel 14, the lower section of funnel 14 and 15 phase of draw-off tray being set on bracket 1
It is right.
Oil syringe is tested TT&C system and is used for according to the physical quantity in test instruction acquisition oil syringe injection process, by each object
Reason amount shows, stores and is sent to industrial personal computer.TT&C system is realized using NI high-speed collection card hardware platform.Oil syringe test
The signal conditioning module that TT&C system includes the sensor for acquiring various physical quantitys, is connect with the output end of sensor, signal tune
The output end of reason module is connect with capture card, and the output end of capture card is connect with industrial personal computer.Capture card using NI9215,
NI9203, NI9216, NI9266, NI9375, NI9381 and NI9751 input-output card.It is connected by its input interface each
Then sensor connects industrial personal computer, then connects pressure regulation valve-driving circuit and driving circuit for electromagnetic valve by its output interface.Point of sensor
Cloth is as shown in Fig. 4.
When test instruction is performance test, the physical quantity of acquisition is oil syringe end pressure；Test instruction is Consistency test
When, the physical quantity of acquisition is injection flow；When test instruction is reliability test, the physical quantity of acquisition is oil syringe end pressure；It surveys
When examination instruction is the test of oil syringe solenoid valve control, the physical quantity of acquisition is injection flow, oil syringe end pressure；Test instruction is to watch
When taking oil pump test, the physical quantity of acquisition is servo oil pump revolving speed；When test instruction is engine speed test, physical quantity is song
Shaft angle generating device revolving speed.
Industrial personal computer receives the letter from each sensor through interface board for issuing test instruction and driving signal, industrial personal computer
Number, judged according to these signals, then acquired card issues control signal.Servo oil rail controls signal via pressure regulation electrohydraulic valve actuator
Road is converted to respective drive signal to servo oil pressure regulating valve, to control the servo oil pressure in servo oil rail.Industrial personal computer hair
Solenoid-driven signal realizes the control to solenoid-driven to driving circuit for electromagnetic valve out.
The external structure of the utility model marine low speed diesel engine Cylinder lubricating system test platform is as shown in Figure 5.
(1) inside testing stand: servo oil hydraulic system and testing & measuring system needed for arrangement oil syringe work.To avoid
The hydraulic oil corrosion contamination cable of leakage, using servo oil circuit and circuit mode arranged apart, left area is measurement and control system
Electrical equipment, such as: industrial personal computer, capture card, each sensor power supply, transmitter and charge amplifier；Right area is test
The auxiliary hydraulic system of platform, such as motor, hydraulic pump, accumulator and servo oil rail.
(2) testing stand operating surface: being disposed with oil syringe clamping and fixing device, the installation for oil syringe exemplar and sensor
With positioning；Test platform panel is from left to right sequentially arranged display, motor control button, display lamp, each sensor power supply electricity
Source switch and indicator light, connector, the servo oil rail pressure pressure gauge of each sensor, return pressure table and oil inlet and oil return pipe fitting etc..
Entire test-bed is the removable entirety of provided with wheels, mobile when convenient for test.
The utility model is suitable for oil syringe performance test, oil syringe exfactory inspection test, oil syringe reliability, consistency
Test, the test of oil syringe solenoid valve control, servo oil pump test, " engine speed " test and offer electronic control cylinder oiling system
Industrial personal computer control strategy of uniting is tested.
Oil syringe performance test: first by top dead centre signal, the crankshaft of 9375 collecting crankshaft corner generating device of capture card
Position signal, tach signal, the cylinder inside crankshaft pistons work situation simulated；In servo oil system, industrial personal computer passes through
Hydraulic oil is pumped into common rail pipe by oil pump through filter by Frequency Converter Control motor, controls flow by way of proportional pressure control valve；When
When the output card 9751 of industrial personal computer gives the output of oil syringe end solenoid valve control current signal, oil syringe work is infused at this time
Oily device end pressure.
Oil syringe exfactory inspection test: oil syringe performance test and Consistency test, reliability test are completed.
Oil syringe reliability: by the oil syringe performance test of 500h, the situation of change of oil syringe end pressure is obtained.
Oil syringe Consistency test: while carrying out oil syringe performance test, oil syringe end passes through pump nozzle for cylinder
In oil injection testboard bay, the energy storage pressure at oil syringe end is used to simulate the pressure in cylinder at this time；It is filled in oiling measurement
In setting, cylinder oil approach catchment cup 2 is connected to the first oil conducting tube 4, and weighing cup body 6 is provided with below the outlet of the first oil conducting tube 4,
Weighing cup body 6 is set to 8 top of weighing device 7 and lifting jack, obtains injection flow at this time.
The test of oil syringe solenoid valve control: for driving, oil syringe acts driving circuit for electromagnetic valve and calibration oil syringe is electrical
Parameter is driven, acquires the current signal of output loop, and compared with the current signal of setting, the error two signals is carried out
Amplified error signal is given to voltage pulse control chip by amplification, and voltage pulse controls chip and passes through the electricity of change output
Duty ratio is pressed to change output electric current, until error meets the requirements between the electric current of output and the electric current of setting, by capture card 9375
Top dead centre signal, the crankshaft-position signal of crank angle generating device are collected, the output card 9751 of industrial personal computer gives oil syringe end
The output of solenoid valve control current signal.Oiling end pressure and flow signal are obtained at oil syringe end.
Servo oil pump test: in carrying out oil syringe performance test, the motor at frequency converter end carries photoelectric encoder, in real time
Motor speed is transmitted to capture card 9375, and then obtain motor speed signal.
" engine speed " test: corner signal generating device is used to simulate crankshaft of diesel engine corner and top dead centre,
Top dead centre signal, crankshaft-position signal, tach signal are sent to industrial personal computer and oil syringe test TT&C system.Crank angle letter
Number generating device, which passes through the servo motor with frequency converter the Axle mould of fluted disc is driven to intend crank rotation, to be realized.Corner signal and upper
Endstop signal is the reference signal of electric-control system (third party ECU), and marine low speed diesel engine is the angle by being mounted on free end
Mark generator assembly (photoelectric encoder) or the fluted disc for being mounted on flywheel generate corner signal.Oil syringe all-round property testing
The Axle mould of the quasi- servo motor driving fluted disc selected with frequency converter of platform intends crank rotation (0r/min~200r/min), mountable
Absolute optical encoder or multiple groups close toothed disc and provide crank angle letter for diesel engine electric control system and testing bench control system
Number, and the reference signal as testing bench control system synchronous acquisition and control.
The test of electronic control cylinder injection system industrial personal computer control strategy: in completing the test of oil syringe solenoid valve control, by
The control current signal back production of 9751 boards output obtains control current signal into capture card.
It will be understood by those of skill in the art that specific embodiments described herein is only special with explanation the utility model
Benefit is not intended to limit the utility model patent.The utility model patent spirit and principle within make any modification,
Equivalent replacement and improvement etc., should be included among the protection scope of the utility model patent.
Claims (6)
1. a kind of marine low speed diesel engine Cylinder lubricating system test platform, including for simulate crankshaft of diesel engine corner and it is upper only
The Shaft angle signal generation apparatus of point, the industrial personal computer for issuing test instruction and driving signal are adopted for being instructed according to test
Collect the oil syringe test TT&C system and oil syringe servo oil system of physical quantity in oil syringe injection process；It is characterized by:
The oil syringe servo oil system includes cylinder oil circuit, servo oil circuit and oiling measuring device, and the cylinder oil circuit includes
The outlet of sequentially connected cylinder fuel tank, cylinder oil service pump, cylinder filter, the cylinder filter is connected with the import of oil syringe；Institute
Stating servo oil circuit includes sequentially connected servo fuel tank, servo filter, servo oil pump, servo oil rail, and servo oil rail passes through electromagnetism
Valve is connected with the import of oil syringe, and the cylinder oil service pump, servo oil pump are engaged by variable-frequency motor drive respectively, the solenoid valve
Pass sequentially through driving circuit for electromagnetic valve, capture card and industry control mechatronics.
2. marine low speed diesel engine Cylinder lubricating system test platform according to claim 1, it is characterised in that: the note
Oily device test TT&C system includes the sensor for acquiring physical quantity, the signal conditioning module connecting with the output end of sensor, institute
The output end for stating signal conditioning module is connect with capture card, and the output end of the capture card is connect with industrial personal computer.
3. marine low speed diesel engine Cylinder lubricating system test platform according to claim 1, it is characterised in that: the song
Shaft angle signal generation apparatus drives the Axle mould of fluted disc to intend crank rotation and realizes by the servo motor with frequency converter.
4. marine low speed diesel engine Cylinder lubricating system test platform according to claim 1, it is characterised in that: described to watch
The import for taking oil pump is connect with filter outlets, servo oil pump outlet connection servo oil rail and servo oil pressure regulating valve into
Mouthful, the outlet of servo oil pressure regulating valve connect with servo fuel tank, safety valve is additionally provided on servo fuel tank, is arranged on servo oil rail
There is accumulator.
5. marine low speed diesel engine Cylinder lubricating system test platform according to claim 1, it is characterised in that: the note
Oil measurement device includes bracket (1), is provided with catchment cup (2) on the bracket (1), the upper end of the catchment cup (2) and note
The jet (16) of oily device connects, and lower end is connected to the first oil conducting tube (4), the second oil conducting tube (5) respectively by oil guide pipe (3),
Weighing cup body (6) is provided with below the outlet of first oil conducting tube (4), the weighing cup body (6) is set to weighing device (7)
With above lifting jack (8), the outside of weighing cup body (6) is equipped with service tank (9), is equipped with outside the service tank (9)
The oil well pump (10) and oil drain pump (11) being attached thereto, the entrance of the oil well pump (10) protrude into the first oil conducting tube by conduit
(4) intracavity bottom；Be provided with graduated cylinder bogey (12) below second oil conducting tube (5), graduated cylinder bogey (12) with
It is provided with oil-break disk (13) between second oil conducting tube (5), between weighing cup body (6) and the first oil conducting tube (4), the oil-break disk
(13) slant setting, low side are placed in the top of funnel (14), the lower section of funnel (14) and the draw-off tray being set on bracket (1)
(15) opposite.
6. marine low speed diesel engine Cylinder lubricating system test platform according to claim 2, it is characterised in that: the biography
Sensor includes servo oil pump speed probe, servo oil pump outlet pressure sensor, servo oil pump outlet temperature sensor, cylinder
Pump speed sensor, cylinder oil service pump outlet pressure sensor, cylinder oil service pump outlet temperature sensor, the displacement of oil syringe main plunger
Signal transducer, oil syringe pilot valve position sensor, oiling quantity sensor, oil syringe side pressure force snesor, steam cylinder oil rail
Pressure sensor, steam cylinder oil rail temperature sensor, servo oil rail pressure sensor, servo oil rail temperature sensor, crank angle
Generating device speed probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821791772.1U CN209115238U (en) | 2018-11-01 | 2018-11-01 | Marine low speed diesel engine Cylinder lubricating system test platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821791772.1U CN209115238U (en) | 2018-11-01 | 2018-11-01 | Marine low speed diesel engine Cylinder lubricating system test platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209115238U true CN209115238U (en) | 2019-07-16 |
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ID=67203342
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821791772.1U Active CN209115238U (en) | 2018-11-01 | 2018-11-01 | Marine low speed diesel engine Cylinder lubricating system test platform |
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| Country | Link |
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| CN (1) | CN209115238U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374778A (en) * | 2019-07-29 | 2019-10-25 | 武汉理工大学 | Marine low speed diesel engine common rail fuel injection system solenoid valve reliability test platform |
| CN110486206A (en) * | 2019-08-12 | 2019-11-22 | 中车资阳机车有限公司 | A kind of measuring device and measurement method of electronic injection diesel engine fuel supply advance angle |
-
2018
- 2018-11-01 CN CN201821791772.1U patent/CN209115238U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374778A (en) * | 2019-07-29 | 2019-10-25 | 武汉理工大学 | Marine low speed diesel engine common rail fuel injection system solenoid valve reliability test platform |
| CN110486206A (en) * | 2019-08-12 | 2019-11-22 | 中车资阳机车有限公司 | A kind of measuring device and measurement method of electronic injection diesel engine fuel supply advance angle |
| CN110486206B (en) * | 2019-08-12 | 2024-04-19 | 中车资阳机车有限公司 | Measuring device and measuring method for oil supply advance angle of electronic injection diesel engine |
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