CN109139323B - Device and method for detecting phase and oil supply time of cam shaft of composite oil injection pump - Google Patents
Device and method for detecting phase and oil supply time of cam shaft of composite oil injection pump Download PDFInfo
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- CN109139323B CN109139323B CN201811316276.5A CN201811316276A CN109139323B CN 109139323 B CN109139323 B CN 109139323B CN 201811316276 A CN201811316276 A CN 201811316276A CN 109139323 B CN109139323 B CN 109139323B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention belongs to the technical field of diesel engine testing, and provides a device and a method for detecting the phase and the oil supply time of a cam shaft of a compound oil injection pump by an oil pump test bed. The device for detecting the phase and the oil supply time of the cam shaft of the compound oil injection pump by the oil pump test bed is provided, wherein the compound oil injection pump is formed by compounding an oil injection pump I and an oil injection pump II; the driving end of the fuel injection pump I is connected with the output end of the stepping driving motor; the output end of the stepping driving motor is provided with a gear disc I with a missing tooth, and the gear disc I corresponds to a magneto-electric sensor I; a gear disc II with teeth missing is arranged between the coupling I and the driving end of the fuel injection pump I; a magneto-electric sensor II is arranged corresponding to the gear plate II; the output end of the fuel injection pump I is connected with the driving end of the fuel injection pump II through a coupling II, and an angle indicator is arranged at the output end of the fuel injection pump II; the invention improves the accuracy of the oil pump test bed in measuring and evaluating the oil injection pump and the oil injector.
Description
Technical Field
The invention belongs to the technical field of diesel engine testing, and particularly describes a device and a method for detecting the phase and the oil supply time of a cam shaft of a compound oil injection pump by an oil pump test bed.
Background
The fuel injection pump is the most important part of the diesel engine, is regarded as the heart part of the diesel engine, once the fuel injection pump goes wrong and can cause the work of the whole diesel engine, the fuel injection pump of the high-speed high-power diesel engine with more than 12 cylinders is generally connected together by adopting a multi-cylinder fuel injection pump through an elastic coupling with flexibility to form a compound multi-cylinder fuel injection pump, the high-speed high-power diesel engine increases with the increase of the rotating speed and the load of the diesel engine along with the increase of the required fuel supply quantity in the test process, the load born by the compound multi-cylinder fuel injection pump is increased, meanwhile, the load born by each fuel injection pump of the compound multi-cylinder fuel injection pump is not completely consistent, the adjusting action of the elastic coupling is limited, the rotating speed of each fuel injection pump of the compound multi-cylinder fuel injection pump is uneven, the consistency of each fuel injection pump cam shaft phase is changed, and the fuel supply moment of each cylinder of the high-speed high-power diesel engine is influenced.
The traditional oil pump test bed can be used for completing the functions of oil supply quantity detection of a single multi-cylinder oil injection pump, pre-stroke adjustment of the oil injection pump, oil quantity non-uniformity detection of the oil injection pump and an oil injector and the like. However, due to the limitation of the functions of the equipment, the phase detection and the oil supply time test of the cam shaft of the compound multi-cylinder oil injection pump cannot be performed, and further analysis of the phase difference of the cam shaft and the difference of the oil injection time after the compound multi-cylinder oil injection pump is connected together through the connecting shaft joint cannot be performed on the oil injection pump.
Disclosure of Invention
The invention aims to solve the problems and provide a device and a method for detecting the phase and the oil supply time of a cam shaft of a compound oil injection pump by an oil pump test bed.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the device for detecting the phase and the oil supply time of the cam shaft of the compound oil injection pump by the oil injection pump test bed comprises an oil injection pump I and an oil injection pump II; the driving end of the fuel injection pump I is connected with the output end of the stepping driving motor through a coupling I; the output end of the stepping driving motor is provided with a gear disc I with a missing tooth, and a magneto-electric sensor I for detecting the rotating speed and phase signals of the output end of the stepping driving motor is arranged corresponding to the gear disc I; a gear disc II with teeth missing is arranged between the coupling I and the driving end of the fuel injection pump I; the structure of the gear plate II is the same as that of the gear plate I; a magneto-electric sensor II for detecting the rotating speed and phase signals of the driving end of the fuel injection pump I is arranged corresponding to the gear plate II; the output end of the fuel injection pump I is connected with the driving end of the fuel injection pump II through a coupling II, and an angle indicator is arranged at the output end of the fuel injection pump II and used for detecting the rotating speed and phase signals of the output end of the fuel injection pump II; the top of the oil injection pump I and the top of the oil injection pump II are respectively provided with a plurality of oil outlet valves, and each oil outlet valve is communicated with an oil injector through a corresponding high-pressure oil pipe; a pressure measuring joint I communicated with the high-pressure oil pipe is arranged between the high-pressure oil pipe and the corresponding oil outlet valve, and a pressure sensor I used for detecting the oil pipe pressure at the pump end of the high-pressure oil pipe is arranged on the pressure measuring joint I; a pressure measuring joint II communicated with the high-pressure oil pipe is arranged between the high-pressure oil pipe and the corresponding oil sprayer, and a pressure sensor II used for detecting the pressure of the oil pipe at the nozzle end of the high-pressure oil pipe is arranged on the pressure measuring joint II; and the phase consistency of each pump camshaft in the actual connection state of the two fuel injection pumps is judged by comparing the consistency of the rotation speed and phase signals of the output end of the motor, the driving end of the fuel injection pump I and the output end of the fuel injection pump II.
And a measuring cup for measuring the oil injection quantity of the oil injector is arranged corresponding to each oil injector.
The racks of the oil injection pump I and the oil injection pump II are connected together, and the oil injection pump I and the oil injection pump II are connected through a rack adjusting device
Controlling the stroke of the rack; the rack adjusting device is arranged at the input end of the oil injection pump I, and the extending racks penetrate through adjusting holes of the fixed bracket and fix the elongation of the racks through compression nuts at the front and rear sides of the adjusting holes; the determination of the amount of rack extension is the length of the rack at the front end of the lifting state adjusting hole minus the length of the rack at the front end of the free state adjusting hole.
The method for detecting the phase and the oil supply time of the camshaft of the compound oil injection pump by using the device for detecting the phase and the oil supply time of the camshaft of the compound oil injection pump by using the oil pump test bed comprises the following steps: the method comprises the steps of connecting water and oil-way related matched equipment required by completing an oil pump test bed test, determining the angle difference between a grating reference position of an angle indicator and the top dead center position of a last oil outlet valve cam shaft of an oil injection pump II, and determining the angle difference between each oil outlet valve of a high-pressure oil pipe I and the oil injection pump II relative to the top dead center position of the last oil outlet valve cam shaft of the oil injection pump II; starting a stepping driving motor, and setting a measurement rotating speed and a circulation number; the rack adjusting device is used for adjusting the rack stroke; synchronously acquiring rotation speed and phase signals measured by angle markers under different rotation speeds and different rack strokes by using an upper computer, and measuring by a pressure sensor I and a pressure sensor II 1 to obtain pressure data of a pump end and a mouth end; in order to ensure measurement accuracy and precision, when the high-pressure oil pipe of each oil outlet valve position of the high-pressure oil pipe I and the oil injection pump II is detected, the pressures of the pump ends and the nozzle ends of all the high-pressure oil pipes connected with the high-pressure oil pipe I and the oil injection pump II are synchronously measured; the rotation speed and phase signals measured by the magneto-electric sensor I, the magneto-electric sensor II and the angle marker are used as references, the missing tooth positions of the gear disc and the gear disc II and the grating reference positions of the angle marker are used as references, the consistency of the rotation speed and phase signals of each rotation of the stepping driving motor, the high-pressure oil pipe I and the oil injection pump II under different rotation speeds and different rack strokes is analyzed, and the consistency of the camshaft phases of the high-pressure oil pipe I and the oil injection pump II in the actual installation state of the compound oil injection pump is judged; obtaining pressure curves of a high-pressure oil pipe pump end and a nozzle end based on corner signals under different rotation speeds and different rack strokes of the high-pressure oil pipe I and the oil injection pump II under the condition of not replacing the oil injector; the racks of the injection pump I and the injection pump II are connected together and are adjusted by the rack adjusting device
And controlling the stroke of the rack. The rack adjusting device is arranged at the input end of the oil injection pump I, and the extending rack penetrates through the adjusting hole of the fixed support and fixes the elongation of the rack through the compression nuts around the adjusting hole. The determination of the amount of rack extension is the length of the rack at the front end of the lifting state adjusting hole minus the length of the rack at the front end of the free state adjusting hole.
Comparing the rotation angle value removal interval angle corresponding to each pressure value point of the pressure curve of the pump end and the mouth end of the high-pressure oil pipe corresponding to each oil outlet valve under the same rotation speed and the same rack stroke, and obtaining the opening time, the ending time and the duration of the oil outlet valve according to the opening pressure and the closing pressure of the oil outlet valve; analyzing the consistency of oil discharge rules of all oil outlet valves of the high-pressure oil pipe I and the oil injection pump II; as shown in fig. 4, this is a pump end pressure curve of a first oil outlet valve high-pressure oil pipe of the oil injection pump i, the opening pressure of the oil outlet valve is 400bar, the corresponding cam shaft rotation angle is-23 deg, the closing pressure is 340 bar, the corresponding cam shaft rotation angle is-1 deg, and the oil injection duration of the oil outlet valve is-1- (-23) =22 deg; the method is used for obtaining the opening pressure and the closing pressure of all the oil outlet valves of the oil injection pump I and the oil injection pump II, and obtaining the opening time, the ending time and the duration of the oil outlet valves, namely the consistency of the oil outlet rules of the oil outlet valves of the high-pressure oil pipe I and the oil injection pump II; the method comprises the steps of replacing different types of oil injectors for testing, and obtaining pressure curves of a pump end and a nozzle end of the high-pressure oil pipe based on corner signals under different rotation speeds and different rack strokes of the high-pressure oil pipe I and the oil injection pump II under the condition of replacing various oil injectors; in the test process, measuring cups are arranged at the tail ends of all the oil injectors, and the consistency of the oil quantity of the high-pressure oil pipe I and the oil outlet valve of the oil injection pump II under different rotating speeds and different rack strokes can be analyzed.
The device for detecting the phase and the oil supply time of the composite oil injection pump cam shaft by the oil pump test bed provided by the invention can realize the functions of detecting the atomization quality of the oil injector, detecting the flow of the oil injector, detecting the oil mass non-uniformity of the oil injector and the like, and can also realize the phase consistency of the cam shafts of the composite oil injection pump in different rotating speeds and different rack strokes under the actual working state, and the consistency of the pressures of the pump end and the nozzle end of the high-pressure oil pipe; the application range of the device is expanded, and the accuracy of the oil pump test bed in measuring and evaluating the oil injection pump and the oil injector is improved.
Drawings
FIG. 1 is a schematic view of a compound injection pump mounted to an oil pump test stand:
fig. 2 is a schematic diagram of a gear disc structure:
FIG. 3 is a cross-sectional view A-A of FIG. 2;
fig. 4 is a schematic view of a rack stroke adjustment device:
FIG. 5 is a schematic diagram of a pump end pressure curve;
fig. 6 is a schematic diagram of a tip pressure curve.
In the figure: 1. step driving motor, 2, gear disc I, 3, coupling I, 4, gear disc II, 5, injection pump I, 6, coupling II, 7, injection pump II, 8, angle marker appearance, 9, high-pressure oil pipe, 10, pressure measurement joint I, 11, pressure measurement joint II, 12, sprayer, 13, measuring cup, 14, slide rail, 15, photoelectric sensor II, 16, photoelectric sensor I, 17, host computer, 18, pressure sensor I, 19, pressure sensor II, 21, rack adjusting device, 22, delivery valve, 23, fixed bolster, 24, front end rack, 25, compression nut.
Detailed Description
The following detailed description of the invention is given with reference to the accompanying drawings, and is made by those skilled in the art to which the invention pertains.
As shown in FIG. 1, a device for detecting the phase and the oil supply time of a cam shaft of a compound oil injection pump by an oil injection pump test bed, wherein the compound oil injection pump is formed by compounding an oil injection pump I5 and an oil injection pump II 7; the driving end of the fuel injection pump I5 is connected with the output end of the stepping driving motor 1 through a coupling I3; the output end of the stepping driving motor 1 is provided with a gear disc I2 with a missing tooth, and a magneto sensor I16 for detecting the rotating speed and phase signals of the output end of the stepping driving motor is arranged corresponding to the gear disc I2; a gear disc II 4 with a missing tooth is arranged between the coupling I3 and the driving end of the fuel injection pump I5; the structure of the gear plate II 4 is the same as that of the gear plate I2; the structures of the gear plate II 4 and the gear plate I2 are shown in fig. 2 and 3; a magneto-electric sensor II 15 for detecting the rotating speed and phase signals of the driving end of the fuel injection pump I is arranged corresponding to the gear plate II 4; the output end of the fuel injection pump I5 is connected with the driving end of the fuel injection pump II 7 through a coupling II 6, and an angle indicator 8 is arranged at the output end of the fuel injection pump II 7 and is used for detecting the rotating speed and phase signals of the output end of the fuel injection pump II 7; the top of the fuel injection pump I5 and the top of the fuel injection pump II 7 are respectively provided with a plurality of oil outlet valves 22, and each oil outlet valve 22 is respectively communicated with the fuel injector 12 through a corresponding high-pressure oil pipe 9; a pressure measuring joint I10 communicated with the high-pressure oil pipe is arranged between the high-pressure oil pipe 9 and the corresponding oil outlet valve 22, and a pressure sensor I18 for detecting the oil pipe pressure at the pump end of the high-pressure oil pipe is arranged on the pressure measuring joint I; a pressure measuring joint II 11 communicated with the high-pressure oil pipe is arranged between the high-pressure oil pipe and the corresponding oil injector, and a pressure sensor II 19 for detecting the pressure of the oil pipe at the nozzle end of the high-pressure oil pipe is arranged on the pressure measuring joint II; the magneto-electric sensor I16, the magneto-electric sensor II 15, the pressure sensor I18 and the pressure sensor II 19 are all communicated with the upper computer 17, and the magneto-electric sensor I16 and the magneto-electric sensor II 15 are used for measuring the rotating speed and phase signals of the gear plate I2 and the gear plate II 4, are communicated with the pressure sensor I10 and the pressure sensor II 11 and are synchronously collected with the upper computer 17. The phase consistency of each pump cam shaft under the actual connection state of the two fuel injection pumps is judged by comparing the consistency of the rotating speed and the phase signals of the output end of the motor 1, the driving end of the fuel injection pump I5 and the output end of the fuel injection pump II 7.
And a measuring cup for measuring the oil injection quantity of the oil injector is arranged corresponding to each oil injector.
As shown in fig. 4, racks of the fuel injection pump I and the fuel injection pump II are connected together, the stroke of the racks is controlled by a rack adjusting device 21, the rack adjusting device 21 is arranged at the input end of the fuel injection pump I5, and a front end rack 24 extending out penetrates through an adjusting hole of a fixed bracket 23 and fixes the elongation of the racks by a compression nut 25 in front of and behind the adjusting hole. The determination of the amount of rack extension is the length of the rack at the front end of the lifting state adjusting hole minus the length of the rack at the front end of the free state adjusting hole.
The method for detecting the phase and the oil supply time of the camshaft of the compound oil injection pump by using the device for detecting the phase and the oil supply time of the camshaft of the compound oil injection pump by using the oil pump test bed comprises the following steps: and (3) connecting relevant matched equipment such as water, oil ways and the like required by the oil pump test bed test, and adjusting the tooth missing positions of the gear wheel disc I2 and the gear wheel disc II 4 to the same angle with the grating reference position of the angle indicator 8. The stepping motor 1 is started, and the measurement rotation speed and the cycle number are set. The rack adjusting device 21 is adjusted to set the rack stroke. The upper computer 17 is used for synchronously collecting rotation speed and phase signals measured by the magneto-electric sensor I16, the magneto-electric sensor II 15 and the angle marker 8 under different rotation speeds and different rack strokes, and analyzing the consistency of rotation speed and phase signals of the stepping motor 1, the high-pressure oil pipe I5 and the injection pump II 7 under different rotation speeds and different rack strokes by taking the tooth missing positions of the gear plate 2 and the gear plate II 4 and the grating reference position of the angle marker 8 as references, so as to judge the consistency of camshaft phases of the high-pressure oil pipe I5 and the injection pump II 7 under the actual installation state of the compound injection pump, and the judging method comprises the following steps: before the test, the gear wheel I2, the gear wheel II 4 and the missing tooth position of the angle indicator 8 are adjusted to the same position, an oil pump test bed is started, and the rotating speed is fixed to 900r/min. Assuming that the number of teeth of the gear wheel I2 and the gear wheel II 4 is 90 and 1 tooth is lacked, the number of gratings of the angle marker 8 is 720 and 1, signals obtained by the gear wheel I2 and the gear wheel II 4 through the magneto-electromagnetic sensor I16 and the magneto-electric sensor II 15 are positive rotation signals, one tooth is a positive rotation signal, 90 and 1 tooth should appear in one circle, the signal obtained by the angle marker 8 is a square wave signal, and 720 and 1 tooth should appear in one circle. The square wave signal of an angle indicator is eight times of the positive rotation signal of the gear wheel I2 and the gear wheel II 4, the number of teeth of the gear wheel I2 and the gear wheel II 4 are the same, so that when the rotating speed and the phase signal of the output end of the stepping driving motor 1, the driving end of the oil injection pump I5 and the output end of the oil injection pump II 7 are the same, except for the tooth missing position, when the gear wheel I4 collects a positive rotation signal, the gear wheel II 4 also just collects a positive rotation signal, and the angle indicator 8 just collects 8 square wave signals. When the positive rotation signal acquired by the gear plate II 4 is more or less than one, the rotation speed of the gear plate II is considered to be increased or decreased, and the time difference is recorded. When the square wave signals acquired by the corner marker 8 are more or less than 8, the rotating speed of the square wave signals can be considered to be increased or reduced, and the time difference is recorded. And obtaining the consistency of the rotation speeds of the output end of the stepping driving motor 1, the driving end of the fuel injection pump I5 and the output end shaft system of the fuel injection pump II 7 at all positions in one circle. The rotation speed signals of the output end of the stepping driving motor 1, the driving end of the fuel injection pump I5 and the output end of the fuel injection pump II 7 are converted into long angle domain signals, and the phase angle difference is calculated according to the time difference among the gear wheel I2, the gear wheel II 4 and the angle indicator 8 in each positive rotation signal in one rotation according to the gear wheel I2, the gear wheel II 4 and the angle indicator 8 when the rotation speeds are inconsistent. The consistency of phase angles of all positions of one circle of rotation of an output end of the stepping driving motor 1, the driving end of the fuel injection pump I5 and the output end shaft system of the fuel injection pump II 7 is obtained;
the method comprises the steps of obtaining a high-pressure oil pipe pump end and nozzle end pressure curve by using an oil injection pump II corner signal as an abscissa through signals of a rotating speed of an oil injection pump II 7, a pressure sensor I18 and a pressure sensor II 19 detected by an angle indicator 8, wherein the corner signal is obtained by the rotating speed of the angle indicator 8, the angle indicator is 720 gratings lacking 1, one circle 720 of square wave signals lack 1, each square wave signal represents 0.5deg, determining the tooth lacking position of the angle indicator 8 and the included angle of the upper dead center position of a cam shaft at each oil outlet valve 22 of the oil injection pump I5 and the oil injection pump II 7 before a test, starting an oil pump test bed, and measuring the pressure curve at the high-pressure oil pipe pump end and the nozzle end and the rotating speed signal of the angle indicator. The rotation speed signal of the angle indicator 8 is converted into an angle signal, the angle signal is used as an abscissa, the pressure value is used as an ordinate, and the angle signal is led into the pressure data of the oil pipe pump end and the nozzle end to form a high-pressure oil pipe pump end and nozzle end pressure curve taking the rotation angle signal of the oil injection pump II as an abscissa.
For each oil outlet valve 22 of the oil injection pump, a fixed oil outlet opening pressure is provided, the opening pressure is assumed to be 400bar, the crank angle value corresponding to 400bar is recorded when the left side pressure of the pump end pressure curve of all high-pressure oil pipes of the oil injection pump I5 and the oil injection pump II 7 rises, the difference value is calculated, namely the actual oil injection interval angle of each oil outlet valve of the oil injection pump I5 and the oil injection pump II 7, the theoretical oil injection interval angle is provided for the oil injection pump I and the oil injection pump II, and the consistency of the oil injection opening time of each oil outlet valve 22 of the oil injection pump can be judged by comparing the difference between the actual oil injection interval angle and the theoretical oil injection interval angle. And the corresponding crank angle value is obtained according to the oil outlet closing pressure of the oil outlet valves 22 of the oil injection pump I5 and the oil injection pump II 7, the crank angle difference value between the crank angle value of the oil outlet closing pressure of the oil outlet valves 22 and the crank angle value of the oil outlet opening pressure of the oil outlet valves 22 is calculated, the oil injection duration of each oil outlet valve 22 of the oil injection pump I5 and the oil injection pump II 7 is obtained, the consistency of the oil injection duration of each oil outlet valve 22 of the oil injection pump I5 and the oil injection pump II 7 is compared, the consistency of the oil injection duration of each oil outlet valve 22 of all the oil injection pumps of the oil injection pump I5 and the oil injection pump II 7, the oil injection pressure and the oil injection time data are judged, and the consistency of the oil injection pressure and the phase of each oil outlet valve position of all the oil injection pumps is judged.
After each part is installed, relevant supporting equipment such as water, oil circuit and the like required by oil pump test bed test are connected, the angle difference between the grating reference position of the angle indicator 8 and the top dead center position of the last oil outlet valve cam shaft of the oil injection pump II 7 is determined, and the angle difference between each oil outlet valve of the high-pressure oil pipe I5 and the oil injection pump II 7 relative to the top dead center position of the last oil outlet valve cam shaft of the oil injection pump II 7 is determined. The stepping motor 1 is started, and the measurement rotation speed and the cycle number are set. The rack adjusting device 21 is adjusted to set the rack stroke. The upper computer 17 is used for synchronously collecting the rotation speed and phase signals measured by the angle marker 8 with different rotation speeds and different rack strokes, and the pressure data of the pump end and the nozzle end are obtained by measuring the pressure sensor I18 and the pressure sensor II 19, and in order to ensure the measurement precision and accuracy, the pressures of the pump end and the nozzle end of all the high-pressure oil pipes connected with the high-pressure oil pipe I5 and the oil injection pump II 7 are synchronously measured when the high-pressure oil pipes 9 at the positions of the oil outlet valves 22 of the high-pressure oil pipe I5 and the oil injection pump II 7 are detected. The rotation speed and phase signals measured by the magneto-electric sensor I16, the magneto-electric sensor II 15 and the angle indicator 8 are used for analyzing the consistency of the rotation speed and phase signals of each turn of the stepping motor 1, the high-pressure oil pipe I5 and the oil injection pump II 7 under different rotation speeds and different rack strokes by taking the tooth missing positions of the gear disc 2 and the gear disc II 4 and the grating reference position of the angle indicator 8 as references, and judging the consistency of the camshaft phases of the high-pressure oil pipe I5 and the oil injection pump II 7 under the actual installation state of the composite oil injection pump. Obtaining pressure curves of a pump end and a nozzle end of the high-pressure oil pipe 9 based on corner signals under different rotation speeds and different rack strokes of the high-pressure oil pipe I5 and the oil injection pump II 7 under the condition of not replacing the oil injector 12; as shown in fig. 5 and 6, fig. 5 is a high-pressure oil pipe pump end curve based on a rotation angle signal, and fig. 6 is a high-pressure oil pipe nozzle end curve based on a rotation angle signal, wherein the two curves take the rotation angle signal of an oil injection pump ii as an abscissa and take a pressure value as an ordinate.
The angular value removal interval angle corresponding to each pressure value point of the pressure curve of the pump end and the nozzle end of the high-pressure oil pipe 9 corresponding to each oil outlet valve 22 under the same rotation speed and the same rack stroke is compared, meanwhile, the opening time, the ending time and the duration of the oil outlet valve are obtained according to the opening pressure and the closing pressure of the oil outlet valve 22, and the consistency of the oil outlet rules of the high-pressure oil pipe I5 and the oil outlet valve 22 of the oil injection pump II 7 is analyzed.
And (3) replacing different types of fuel injectors for testing, and obtaining pressure curves of the pump end and the nozzle end of the high-pressure fuel pipe based on corner signals under different rotating speeds and different rack strokes of the high-pressure fuel pipe I5 and the fuel injection pump II 7 under the condition of replacing various fuel injectors.
And comparing the angular value removal interval angle corresponding to each pressure value point of the pressure curve of the pump end and the mouth end of the high-pressure oil pipe 9 corresponding to each oil outlet valve 22 under the same rotation speed and the same rack stroke, and obtaining the opening time, the ending time and the duration of the oil sprayer 12 according to the opening pressure and the closing pressure of the oil sprayer 12. The consistency of the injection schedule of each injector 12 is analyzed.
In the test process, the tail end of each oil sprayer 12 is provided with a measuring cup 13, and the consistency of the oil quantity of the high-pressure oil pipe I5 and the oil outlet valve of the oil injection pump II 7 under different rotation speeds and different rack strokes can be analyzed.
The angle marker adopted by the device and the method for detecting the phase and the oil supply time of the cam shaft of the compound oil injection pump is 365C of AVL List test equipment limited company.
Claims (3)
1. A device that is used for oil pump test bench to detect compound injection pump camshaft phase place and oil feed moment, its characterized in that: the compound fuel injection pump is formed by compounding a fuel injection pump I and a fuel injection pump II; the driving end of the fuel injection pump I is connected with the output end of the stepping driving motor through a coupling I; the output end of the stepping driving motor is provided with a gear disc I with a missing tooth, and a magneto-electric sensor I for detecting the rotating speed and phase signals of the output end of the stepping driving motor is arranged corresponding to the gear disc I; a gear disc II with teeth missing is arranged between the coupling I and the driving end of the fuel injection pump I; the structure of the gear plate II is the same as that of the gear plate I; a magneto-electric sensor II for detecting the rotating speed and phase signals of the driving end of the fuel injection pump I is arranged corresponding to the gear plate II; the output end of the fuel injection pump I is connected with the driving end of the fuel injection pump II through a coupling II, and an angle indicator is arranged at the output end of the fuel injection pump II and used for detecting the rotating speed and phase signals of the output end of the fuel injection pump II; the top of the oil injection pump I and the top of the oil injection pump II are respectively provided with a plurality of oil outlet valves, and each oil outlet valve is communicated with an oil injector through a corresponding high-pressure oil pipe; a pressure measuring joint I communicated with the high-pressure oil pipe is arranged between the high-pressure oil pipe and the corresponding oil outlet valve, and a pressure sensor I used for detecting the oil pipe pressure at the pump end of the high-pressure oil pipe is arranged on the pressure measuring joint I; a pressure measuring joint II communicated with the high-pressure oil pipe is arranged between the high-pressure oil pipe and the corresponding oil sprayer, and a pressure sensor II used for detecting the pressure of the oil pipe at the nozzle end of the high-pressure oil pipe is arranged on the pressure measuring joint II; the phase consistency of each pump camshaft in the actual connection state of the two fuel injection pumps is judged by comparing the consistency of the rotation speeds and phase signals of the output end of the motor, the driving end of the fuel injection pump I and the output end of the fuel injection pump II; the rack of the oil injection pump I and the rack of the oil injection pump II are connected together, and the stroke of the rack is controlled by the rack adjusting device; the rack adjusting device is arranged at the input end of the oil injection pump I, and the extending racks penetrate through adjusting holes of the fixed bracket and fix the elongation of the racks through compression nuts at the front and rear sides of the adjusting holes; the determination of the amount of rack extension is the length of the rack at the front end of the lifting state adjusting hole minus the length of the rack at the front end of the free state adjusting hole.
2. The device for detecting the phase and the oil supply time of the camshaft of the compound oil injection pump by using the oil pump test bed as claimed in claim 1, wherein: and a measuring cup for measuring the oil injection quantity of the oil injector is arranged corresponding to each oil injector.
3. The method for detecting the phase and the oil supply time of the composite oil injection pump camshaft by using the device for detecting the phase and the oil supply time of the composite oil injection pump camshaft by the oil pump test stand according to any one of claims 1-2 comprises the following steps:
the method comprises the steps of connecting water and oil-way related matched equipment required by completing an oil pump test bed test, determining the angle difference between a grating reference position of an angle indicator and the top dead center position of a last oil outlet valve cam shaft of an oil injection pump II, and determining the angle difference between each oil outlet valve of a high-pressure oil pipe I and the oil injection pump II relative to the top dead center position of the last oil outlet valve cam shaft of the oil injection pump II; starting a stepping driving motor, and setting a measurement rotating speed and a circulation number; the rack adjusting device is used for adjusting the rack stroke; synchronously acquiring rotation speed and phase signals measured by angle markers under different rotation speeds and different rack strokes by using an upper computer, and measuring by a pressure sensor I and a pressure sensor II 1 to obtain pressure data of a pump end and a mouth end; in order to ensure measurement accuracy and precision, when the high-pressure oil pipe of each oil outlet valve position of the high-pressure oil pipe I and the oil injection pump II is detected, the pressures of the pump ends and the nozzle ends of all the high-pressure oil pipes connected with the high-pressure oil pipe I and the oil injection pump II are synchronously measured; the rotation speed and phase signals measured by the magneto-electric sensor I, the magneto-electric sensor II and the angle marker are used as references, the missing tooth positions of the gear disc and the gear disc II and the grating reference positions of the angle marker are used as references, the consistency of the rotation speed and phase signals of each rotation of the stepping driving motor, the high-pressure oil pipe I and the oil injection pump II under different rotation speeds and different rack strokes is analyzed, and the consistency of the camshaft phases of the high-pressure oil pipe I and the oil injection pump II in the actual installation state of the compound oil injection pump is judged; obtaining pressure curves of a high-pressure oil pipe pump end and a nozzle end based on corner signals under different rotation speeds and different rack strokes of the high-pressure oil pipe I and the oil injection pump II under the condition of not replacing the oil injector; the rack of the oil injection pump I and the rack of the oil injection pump II are connected together, and the stroke of the rack is controlled by a rack adjusting device; the rack adjusting device is arranged at the input end of the oil injection pump I, and the extending racks penetrate through adjusting holes of the fixed bracket and fix the elongation of the racks through compression nuts at the front and rear sides of the adjusting holes; the determination of the extension amount of the racks is that the length of the racks at the front end of the lifting state adjusting hole is subtracted by the length of the racks at the front end of the free state adjusting hole; comparing the rotation angle value removal interval angle corresponding to each pressure value point of the pressure curve of the pump end and the mouth end of the high-pressure oil pipe corresponding to each oil outlet valve under the same rotation speed and the same rack stroke, and obtaining the opening time, the ending time and the duration of the oil outlet valve according to the opening pressure and the closing pressure of the oil outlet valve; analyzing the consistency of oil discharge rules of all oil outlet valves of the high-pressure oil pipe I and the oil injection pump II; the oil injection valve is characterized in that the oil injection valve is a high-pressure oil pipe pump end pressure curve of a first oil outlet valve of an oil injection pump I, the opening pressure of the oil outlet valve is 400bar, the corresponding cam shaft rotation angle is-23 deg, the closing pressure is 340 bar, the corresponding cam shaft rotation angle is-1 deg, and the oil injection duration of the oil outlet valve is-1- (-23) =22 deg; the method is used for obtaining the opening pressure and the closing pressure of all the oil outlet valves of the oil injection pump I and the oil injection pump II, and obtaining the opening time, the ending time and the duration of the oil outlet valves, namely the consistency of the oil outlet rules of the oil outlet valves of the high-pressure oil pipe I and the oil injection pump II; the method comprises the steps of replacing different types of oil injectors for testing, and obtaining pressure curves of a pump end and a nozzle end of the high-pressure oil pipe based on corner signals under different rotation speeds and different rack strokes of the high-pressure oil pipe I and the oil injection pump II under the condition of replacing various oil injectors; in the test process, measuring cups are arranged at the tail ends of all the oil injectors, and the consistency of the oil quantity of the high-pressure oil pipe I and the oil outlet valve of the oil injection pump II under different rotating speeds and different rack strokes can be analyzed.
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| CN201811316276.5A CN109139323B (en) | 2018-11-07 | 2018-11-07 | Device and method for detecting phase and oil supply time of cam shaft of composite oil injection pump |
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| CN111561414B (en) * | 2020-04-29 | 2021-05-04 | 河南柴油机重工有限责任公司 | Method and device for measuring rotation speed fluctuation of camshaft of high-pressure oil pump |
| CN112065624B (en) * | 2020-09-10 | 2021-10-08 | 潍柴动力股份有限公司 | High-pressure oil pump mounting method, engine and vehicle |
| CN112213110A (en) * | 2020-09-29 | 2021-01-12 | 上汽通用五菱汽车股份有限公司 | Method and system for measuring phase of driving cam of high-pressure oil pump of gasoline engine and storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0129776A1 (en) * | 1983-06-27 | 1985-01-02 | Siemens Aktiengesellschaft | Control device for an internal combustion engine |
| JP2000314361A (en) * | 1999-05-06 | 2000-11-14 | Nissan Motor Co Ltd | Fuel injection timing measuring device for diesel engine |
| JP2001082298A (en) * | 1999-09-17 | 2001-03-27 | Kubota Corp | Measuring method for injection initiation timing in fuel injection pump |
| CN2727432Y (en) * | 2004-05-18 | 2005-09-21 | 河南科技大学 | Test stand for automatically measuring oil mass of injection pump |
| CN101021193A (en) * | 2007-03-20 | 2007-08-22 | 湖北省机电研究设计院 | Method for measuring injection pump pretravel and fuel supply included angle |
| DE102010030447A1 (en) * | 2010-06-23 | 2011-12-29 | Bayerische Motoren Werke Aktiengesellschaft | Method for determining position of top dead point in HDP5 in combustion engine for direct injection of petrol, involves determining opening point by measuring electrical variable in electrical current supply path for solenoid coil |
| CN102506001A (en) * | 2011-11-23 | 2012-06-20 | 北京理工大学 | Oil injection characteristic calibration method on basis of electrically controlled monoblock pump prestrokes |
| CN102588180A (en) * | 2012-02-23 | 2012-07-18 | 北京理工大学 | Calibration method of oil injection characteristic of fuel system on unit pump test bed |
-
2018
- 2018-11-07 CN CN201811316276.5A patent/CN109139323B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0129776A1 (en) * | 1983-06-27 | 1985-01-02 | Siemens Aktiengesellschaft | Control device for an internal combustion engine |
| JP2000314361A (en) * | 1999-05-06 | 2000-11-14 | Nissan Motor Co Ltd | Fuel injection timing measuring device for diesel engine |
| JP2001082298A (en) * | 1999-09-17 | 2001-03-27 | Kubota Corp | Measuring method for injection initiation timing in fuel injection pump |
| CN2727432Y (en) * | 2004-05-18 | 2005-09-21 | 河南科技大学 | Test stand for automatically measuring oil mass of injection pump |
| CN101021193A (en) * | 2007-03-20 | 2007-08-22 | 湖北省机电研究设计院 | Method for measuring injection pump pretravel and fuel supply included angle |
| DE102010030447A1 (en) * | 2010-06-23 | 2011-12-29 | Bayerische Motoren Werke Aktiengesellschaft | Method for determining position of top dead point in HDP5 in combustion engine for direct injection of petrol, involves determining opening point by measuring electrical variable in electrical current supply path for solenoid coil |
| CN102506001A (en) * | 2011-11-23 | 2012-06-20 | 北京理工大学 | Oil injection characteristic calibration method on basis of electrically controlled monoblock pump prestrokes |
| CN102588180A (en) * | 2012-02-23 | 2012-07-18 | 北京理工大学 | Calibration method of oil injection characteristic of fuel system on unit pump test bed |
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