CN111561414B - Method and device for measuring rotation speed fluctuation of camshaft of high-pressure oil pump - Google Patents
Method and device for measuring rotation speed fluctuation of camshaft of high-pressure oil pump Download PDFInfo
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- CN111561414B CN111561414B CN202010358435.9A CN202010358435A CN111561414B CN 111561414 B CN111561414 B CN 111561414B CN 202010358435 A CN202010358435 A CN 202010358435A CN 111561414 B CN111561414 B CN 111561414B
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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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Abstract
The invention aims to provide a method and a device for measuring the rotation speed fluctuation of a camshaft of a high-pressure oil pump, which are characterized in that: the crankshaft is driven by a gear set and an input end camshaft of the multi-cylinder combined pump connected in series; acquiring the rotating speed of a crankshaft and a camshaft at the input end of a multi-cylinder combined pump connected in series through a sensor to obtain rotating speed fluctuation; meanwhile, the rotation difference of the crankshaft, the camshaft at the input end of the multi-cylinder combined pump connected in series and the connecting shaft between the multi-cylinder combined pumps connected in series is detected through the detection unit, so that the motion state of the system is obtained. The method has the advantages of simplicity and reliability, and the device has a simple structure and high measurement accuracy and is suitable for production and use.
Description
Technical Field
The invention belongs to the technical field of diesel engine testing, and particularly designs a high-pressure oil pump camshaft rotation speed fluctuation measuring system and a testing method for series connection of a multi-cylinder combination pump.
Background
Diesel engines are widely used in various fields due to their excellent thermal efficiency and power performance, among which the "heart" of a diesel engine is a high pressure oil pump, which is the most important component in a fuel supply system of a diesel engine. Whether the high-pressure oil pump works normally or not plays an important role in the operation of the whole diesel engine. The driving force of the high-pressure oil pump of the diesel engine is supplied by a crankshaft, and the crankshaft transmits the rotating speed to a camshaft of the high-pressure oil pump according to a certain proportion through an intermediate gear set in a gear box to drive the high-pressure oil pump to work. Because the multi-cylinder diesel engine has a large number of cylinders, one high-pressure oil pump generally cannot meet the requirement, and therefore, a plurality of high-pressure oil pumps are connected together through a coupling for use. For the faults of uneven work of each cylinder, uneven oil supply of front and rear pumps, rotation speed fluctuation, coupling separation and the like of a multi-cylinder diesel engine, the common method is to stop the engine, carry out dismounting detection on an oil supply system and a gear system, determine the fault source, waste time and labor, have low efficiency and are not beneficial to the production and operation activities of diesel engine manufacturers.
Therefore, a method and a device for measuring the rotation speed fluctuation of the camshaft of the high-pressure oil pump are urgently needed to be researched and developed.
Disclosure of Invention
The invention aims to provide a method and a device for measuring the rotation speed fluctuation of a high-pressure oil pump camshaft, which are convenient for measuring the rotation speed fluctuation of the high-pressure oil pump camshaft and improve the production efficiency.
In order to achieve the purpose, the invention adopts the specific scheme that: a method for measuring the rotation speed fluctuation of a camshaft of a high-pressure oil pump is characterized by comprising the following steps: the crankshaft is driven by a gear set and an input end camshaft of the multi-cylinder combined pump connected in series; acquiring the rotating speed of a crankshaft and a camshaft at the input end of a multi-cylinder combined pump connected in series through a sensor to obtain rotating speed fluctuation; meanwhile, the rotation difference of the crankshaft, the camshaft at the input end of the multi-cylinder combined pump connected in series and the connecting shaft between the multi-cylinder combined pumps connected in series is detected through the detection unit, so that the motion state of the system is obtained.
Gears with one tooth missing are respectively arranged on connecting shafts among the crankshaft, the input end camshaft of the multi-cylinder combined pump connected in series and the multi-cylinder combined pump connected in series; the positions of the missing teeth of the three gears are unified; the rotating speed of the crankshaft, the input end camshaft of the multi-cylinder combined pump connected in series and the rotating speed of the connecting shaft between the multi-cylinder combined pumps connected in series are indirectly obtained by detecting the position of the notch.
A high-pressure oil pump camshaft rotational speed fluctuation measuring device comprises a crankshaft for providing driving force, a high-pressure oil pump I and a high-pressure oil pump II which are connected in series, and a control assembly; the crankshaft is in meshing transmission with the driving shaft through a gear transmission mechanism; the driving shaft is connected with the input end of the high-pressure oil pump I through a shaft; the high-pressure oil pump I is connected with the high-pressure oil pump II through a coupling II; the control assembly comprises an upper computer, a data acquisition instrument, a first rotating speed sensor group for acquiring a crankshaft and a driving shaft and a second rotating speed sensor group for detecting the driving shaft, a front pump camshaft and a rear pump camshaft; the data acquisition instrument is electrically connected with the first rotating speed sensor group and the second rotating speed sensor group respectively to acquire data.
The first rotating speed sensor group comprises a shock absorber, an angle marking instrument I and an angle marking instrument II; wherein, the shock absorber is arranged at the end part of the crankshaft; the angle marking instrument I is arranged on the shock absorber; the angle marking instrument II is arranged at the end part of the driving shaft; wherein, angle mark appearance I, angle mark appearance II all with data acquisition appearance electric connection.
The second rotating speed sensor group comprises a positioning gear, a test gear I, a test gear II, a rotating speed sensor I, a rotating speed sensor II and a rotating speed sensor III; wherein, the positioning gear is arranged on the driving shaft; the test gear I is arranged on a front pump cam shaft; the test gear II is arranged on the rear pump cam shaft;
the positioning gear, the testing gear I and the testing gear II have the same modulus and are provided with a missing tooth, and the positions of the notches in the initial state are uniform; wherein, revolution speed sensor I, revolution speed sensor II, revolution speed sensor III all with data acquisition instrument electric connection.
Has the advantages that: the invention can synchronously acquire the rotating speed signals of the crankshaft, the camshaft driving shaft, the front pump camshaft and the rear pump camshaft: analyzing the rotation fluctuation conditions of the crankshaft and the front and back rotation transmitted by the intermediate gear, and analyzing the rotation speed change conditions of the camshaft driving shaft, the front pump camshaft and the back pump camshaft relative to the crankshaft; the device for analyzing the rotation speed change among the camshaft driving shaft, the front pump camshaft and the rear pump camshaft has the advantages of simple and reliable method, simple structure and high measurement accuracy, and is suitable for production and use.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
The device comprises a crankshaft 1, a crankshaft 2, transmission gears 3, a shock absorber 4, a corner mark instrument I, 5, a middle transmission gear set 6, a corner mark instrument II, 7, a driving gear 8, a driving shaft 9, a front pump camshaft 10, a rear pump camshaft 11, a positioning gear 12, a coupling I, 13, a testing gear I, 14, a high-pressure oil pump I, 15, a coupling II, 16, a testing gear II, 17, a high-pressure oil pump II, 18, a rotating speed sensor I, 19, a rotating speed sensor II, 20, a rotating speed sensor III, 21, a data acquisition instrument 22, an upper computer and a high-pressure oil pump camshaft 23.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1: a high-pressure oil pump camshaft rotation speed fluctuation measuring system and a test method for multi-cylinder combination pump series connection use are disclosed: a transmission gear 2, a vibration absorber 3 with the functions of adjusting the inherent frequency of the crankshaft and absorbing vibration and an angle indicator I4 are concentrically arranged at the free end of the crankshaft 1 of the diesel engine; the angle marking instrument I4 is concentrically arranged on the outermost side of the free end of the diesel engine crankshaft 1 and is used for measuring the rotating speed of the diesel engine crankshaft 1; the transmission gear 2 is meshed with the intermediate transmission gear set 5 to transmit the rotating speed and the torque; the middle transmission gear set 5 is meshed with the driving gear 7 to transmit the rotating speed and the torque; the driving gear 7 is concentrically arranged on the outer side of the high-pressure oil pump cam shaft 23; an angle indicator II 6 for measuring the rotating speed of the camshaft 23 of the high-pressure oil pump is concentrically arranged on the driving gear 7; the high-pressure oil pump camshaft 23 consists of a driving shaft 8, a front pump camshaft 9 and a rear pump camshaft 10; the driving shaft 8 is connected with a front pump camshaft 9 through a coupling I12; the front pump camshaft 9 is connected with the rear pump camshaft 10 through a coupling II 15; the coupling I12 and the coupling II 15 transmit rotating speed and torque, and meanwhile when one connecting piece of the driving shaft 8, the front pump camshaft 9 and the rear pump camshaft 10 suddenly bears overlarge load, other connecting pieces are protected from being influenced; the front end of the driving shaft 8 is concentrically provided with a driving gear 7, the middle of the driving shaft is concentrically provided with a positioning gear 11, and the rear end of the driving shaft is connected with a coupling I12; the positioning gear 11 is used for measuring the rotating speed of the driving shaft 8; the positioning gear 11 measures 1 missing tooth, and the position of the missing tooth is used for positioning; a rotating speed sensor I18 for measuring the rotating speed of the driving shaft 8 is arranged on one side of the positioning gear 11 in a matched mode; the front end of the front pump camshaft 9 is connected with a coupling I12, and the rear end of the front pump camshaft is connected with a coupling II 15; the middle part of the front pump camshaft 9 is provided with a high-pressure oil pump I14 and a test gear I13; the test gear I13 is used for measuring the rotating speed of the front pump camshaft 9; 1 tooth of the test gear I13 is omitted, and the test gear I13 is located between the coupling I12 and the high-pressure oil pump I9; a rotating speed sensor II 19 for measuring the rotating speed of the front pump camshaft 9 is installed on one side of the test gear I13 in a matched mode; the front end of the rear pump camshaft 10 is connected with a coupling II; a high-pressure oil pump II 17 and a test gear II 16 are mounted on the rear pump camshaft 10; the test gear II 16 is used for measuring the rotating speed of the rear pump camshaft 10; 1 tooth of the test gear II 16 is omitted, and the test gear II is positioned between the coupling II 15 and the high-pressure oil pump II 17; a rotating speed sensor III 20 for measuring the rotating speed of the rear pump camshaft 10 is arranged on one side of the test gear II 16 in a matched mode; when the positioning gear 11, the testing gear I13 and the testing gear II 16 are installed, the tooth missing positions are kept consistent; when the rotating speed sensor I18, the rotating speed sensor II 19 and the rotating speed sensor III 20 are installed, the space positions are kept consistent, and the distances of the tooth missing positions relative to the positioning gear 11, the testing gear I13 and the testing gear II 16 are kept consistent.
The invention transmits the rotating speed of the diesel engine to the high-pressure oil pump camshaft 23 according to a certain proportion through gear engagement after the diesel engine is started: the crankshaft 1 rotates, and the rotating speed is transmitted to the intermediate transmission gear set 5 through meshing transmission of the transmission gear 2 and the intermediate transmission gear set 5; the middle transmission gear set 5 transmits the rotating speed to the driving gear 7 through the transmission of the middle transmission gear set 5; the driving gear 7 transmits the rotating speed to a front pump camshaft 9 through a coupling I12; the front pump camshaft 9 transmits the rotational speed to the rear pump camshaft 10 via a coupling ii 15.
The invention synchronously collects the rotating speed of each mechanism part when the diesel engine is started: the data acquisition instrument 21 synchronously acquires rotating speed signals of an angle indicator I4, an angle indicator II 6, a rotating speed sensor I18, a rotating speed sensor II 19 and a rotating speed sensor III 20: the data acquisition instrument 21 processes the rotating speed signal and then transmits the rotating speed signal to the upper computer 22, and the upper computer 22 processes and analyzes the data again: the angle marking instrument I4 collects a rotating speed signal of the crankshaft 1; the angle marking instrument II 6 is used for acquiring a rotating speed signal of the high-pressure oil pump camshaft 23; the rotating speed sensor I18 acquires a rotating speed signal of the positioning gear 11; the rotating speed sensor II 19 acquires a rotating speed signal of a rotating speed signal test gear I13 of the positioning gear 11; and the rotating speed sensor III 20 acquires a rotating speed signal of the test gear II 16.
The invention analyzes the gear transmission structure as follows: performing torsional vibration calculation analysis on the rotating speed signals of the crankshaft 1 and the high-pressure oil pump camshaft 23 acquired by the angle indicator I4 and the angle indicator II 6, analyzing the torsional vibration characteristics of the crankshaft 1 and the high-pressure oil pump camshaft 23, and analyzing the states of the crankshaft 1 and the high-pressure oil pump camshaft 23 according to the torsional vibration characteristics; calculating and analyzing the actual rotation speed ratio of the rotation speed of the crankshaft 1 and the rotation speed of the high-pressure oil pump camshaft 23, comparing and analyzing the actual rotation speed ratio with the designed rotation speed ratio, and determining whether the gear transmission mechanism meets the requirements, whether the motion state is normal, whether a fault exists and whether the fault causes and the fault positions are convenient to analyze after the fault occurs; the rotation speed fluctuation situation of the high-pressure oil pump camshaft 23 relative to the crankshaft rotation speed 1 and the rotation speed ratio fluctuation situation are analyzed.
The present invention analyzes the high-pressure oil pump camshaft 23 as follows: according to the rotating speed signals of the driving shaft 8, the front pump camshaft 9 and the rear pump camshaft 10 synchronously acquired by the rotating speed sensor I18, the rotating speed sensor II 19 and the rotating speed sensor III 20, firstly, the rotating speed numerical values displayed by the driving shaft 8, the front pump camshaft 9 and the rear pump camshaft 10 at each moment are analyzed, the rotating speed fluctuation conditions among the driving shaft 8, the front pump camshaft 9 and the rear pump camshaft 10 are analyzed, whether the requirements are met or not, whether the motion state is normal or not, whether faults exist or not and whether the fault reasons and fault positions are convenient to analyze or not after the faults occur are analyzed; analyzing the relative position of the tooth missing position of a test gear I of a front pump camshaft 9 and a test gear II 16 of a rear pump camshaft 10 relative to the tooth missing position of a positioning gear 11 of a driving shaft 8 and the relative position change condition of the tooth missing position between the front pump camshaft 9 and the rear pump camshaft 10 at different moments, analyzing whether the requirements are met or not, analyzing whether the motion state is normal or not, analyzing whether the fault exists or not and analyzing the fault reason and the fault position conveniently after the abnormity occurs, analyzing the transmission capacity of a coupling I12 and a coupling II 15, analyzing whether the requirements are met or not, analyzing whether the motion state is normal or not, whether the fault exists or not and analyzing whether the fault reason and the fault position conveniently after the abnormity occurs or not.
The invention can be used for real-time monitoring the rotating speed of each mechanism of the crankshaft 1, the intermediate transmission gear set 5 and the high-pressure oil pump camshaft 23, fault early warning, analyzing whether the requirements are met, whether the motion state is normal, whether faults exist and conveniently analyzing the fault reasons and fault positions after the faults occur.
In the specific embodiment I, assuming that the rotation speed of the diesel engine is 1800 rpm, the transmission ratio of the gear mechanism is 2:1, the rotation speed signals of the crankshaft 1, the high-pressure oil pump camshaft 23, the drive shaft 8, the front pump camshaft 9 and the rear pump camshaft 10 within 10min are synchronously acquired through the angle indicator I4, the angle indicator ii 6, the rotation speed sensor I18, the rotation speed sensor ii 19 and the rotation speed sensor iii 20, and the step of acquiring the rotation speed fluctuation is as follows: synchronously acquiring rotating speed signals of the crankshaft 1 and the high-pressure oil pump camshaft 2310 min through an angle indicator I4 and an angle indicator II 6; calculating the rotating speed ratio of the crankshaft 1 and the high-pressure oil pump camshaft 23 collected by the angle indicator I4 and the angle indicator II 6 at each moment, converging the rotating speed ratio into a curve, analyzing the change condition of the rotating speed ratio according to the curve, and if the rotating speed ratio is greater than 2.06:1 or less than 1.94:1 at some moments, determining that the gear transmission mechanism does not meet the requirement or fails, and checking the gear transmission mechanism; according to a rotation speed signal of the crankshaft 110 min acquired by an angle marking instrument I4, calculating the maximum value and the minimum value of the rotation speed of the crankshaft 1 within 10min, and calculating the rotation speed fluctuation rate of the crankshaft 1 within 10min according to the maximum value and the minimum value, if the rotation speed fluctuation rate is more than 2%, the crankshaft 1 is considered not to meet the requirement or to have a fault, the crankshaft 1 needs to be checked, meanwhile, the torsion angle of the crankshaft 1 is calculated according to the rotation speed signal of the crankshaft 1, the stress of the crankshaft 1 is calculated according to the torsion angle, and the stress is not more than a specified; acquiring a rotating speed signal of the high-pressure oil pump camshaft 2310 min according to an angle indicator II 6, calculating the maximum value and the minimum value of the rotating speed of the high-pressure oil pump camshaft 23 within 10min, calculating the rotating speed fluctuation rate of the high-pressure oil pump camshaft 23 within 10min according to the maximum value and the minimum value, if the rotating speed fluctuation rate is more than 3%, determining that the high-pressure oil pump camshaft 23 does not meet the requirement or fails, checking the gear transmission mechanism and the high-pressure oil pump camshaft 23, calculating the torsion angle of the high-pressure oil pump camshaft 23 according to the rotating speed signal of the high-pressure oil pump camshaft 2310 min, calculating the stress of the high-pressure oil pump camshaft 23 according.
Specific example II: the step of obtaining the motion state is as follows: synchronously acquiring 10min rotation speed signals of a driving shaft 8, a front pump camshaft 9 and a rear pump camshaft 10 through a rotation speed sensor I18, a rotation speed sensor II 19 and a rotation speed sensor III 20; calculating the difference value of the 10min rotating speeds of the front pump camshaft 9 and the rear pump camshaft 10 synchronously acquired by the rotating speed sensor II 19 and the rotating speed sensor III 20 at each moment relative to the driving shaft 8 acquired by the rotating speed sensor I18, compiling into a curve, analyzing the change condition of the rotating speed ratio according to the curve, and if the rotating speed difference value is larger than 10r/min at certain moment, determining that the coupling I12 or the coupling II 15 does not meet the installation requirement or fails, and checking the condition; calculating the maximum value and the minimum value of the rotating speed of the driving shaft 8 within 10min according to the rotating speed signal of the driving shaft 810 min acquired by the rotating speed sensor I18, and calculating the rotating speed fluctuation rate of the driving shaft 8 within 10min according to the maximum value and the minimum value, wherein if the rotating speed fluctuation rate is more than 3%, the driving shaft 8 is considered to be not satisfactory or failed, and needs to be checked; calculating the maximum value and the minimum value of the rotating speed of the front pump camshaft 9 within 10min according to the rotating speed signal of the front pump camshaft 910 min acquired by the rotating speed sensor II 19, and calculating the rotating speed fluctuation rate of the front pump camshaft 9 within 10min according to the maximum value and the minimum value, wherein if the rotating speed fluctuation rate is more than 3%, the front pump camshaft 9 is considered not to meet the requirements or to be in failure, and the examination needs to be carried out; calculating the maximum value and the minimum value of the rotating speed of the rear pump camshaft 10 within 10min according to a rotating speed signal of the rear pump camshaft 1010 min acquired by a rotating speed sensor III 20, and calculating the rotating speed fluctuation rate of the rear pump camshaft 10 within 10min according to the maximum value and the minimum value, wherein if the rotating speed fluctuation rate is more than 3%, the rear pump camshaft 10 is considered not to meet the requirements and needs to be checked;
when the positioning gear 11, the test gear I13 and the test gear II 16 are installed, the tooth missing positions are kept consistent, the 10min rotating speeds of the driving shaft 8, the front pump cam shaft 9 and the rear pump cam shaft 10 are synchronously acquired by the rotating speed sensor I18, the rotating speed sensor II 19 and the rotating speed sensor III 20 through the positioning gear 11, the test gear I13 and the test gear II 16, rotating speed change curves at all times are recorded, the change situation of the tooth missing position acquired by each rotation of the rotating speed sensor II 19 and the rotating speed sensor III 20 relative to the change of the tooth missing position of the rotating speed sensor I18 relative to the positioning gear 11 is analyzed, theoretically, the tooth missing positions are kept consistent with the initial state, if the phenomenon of delaying or advancing occurs, the connection of the coupling I12 or the coupling II 15 is.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily change or replace the present invention within the technical scope of the present invention. Therefore, the protection scope of the present invention is subject to the protection scope of the claims.
Claims (4)
1. A method for measuring the rotation speed fluctuation of a camshaft of a high-pressure oil pump is characterized by comprising the following steps: the crankshaft is driven by a gear set and an input end camshaft of the multi-cylinder combined pump connected in series; acquiring the rotating speed of a crankshaft and a camshaft at the input end of a multi-cylinder combined pump connected in series through a sensor to obtain rotating speed fluctuation; meanwhile, the rotation difference of the crankshaft, the camshaft at the input end of the multi-cylinder combined pump connected in series and the connecting shaft between the multi-cylinder combined pumps connected in series is detected through a detection unit;
gears with one tooth missing are respectively arranged on connecting shafts among the crankshaft, the input end camshaft of the multi-cylinder combined pump connected in series and the multi-cylinder combined pump connected in series; the positions of the missing teeth of the three gears are unified; the rotating speed of the crankshaft, the input end camshaft of the multi-cylinder combined pump connected in series and the rotating speed of the connecting shaft between the multi-cylinder combined pumps connected in series are indirectly obtained by detecting the position of the notch.
2. A high-pressure oil pump camshaft rotational speed fluctuation measuring device applying the method of claim 1, comprising a crankshaft (1) for providing driving force, a high-pressure oil pump I (14) and a high-pressure oil pump II (17) which are connected in series, and a control assembly; wherein, the crankshaft (1) is in meshing transmission with the driving shaft (8) through a gear transmission mechanism; the driving shaft (8) is in shaft connection with the input end of a high-pressure oil pump I (14); the high-pressure oil pump I (14) is connected with the high-pressure oil pump II (17) through a coupling II (15); the control assembly comprises an upper computer (22), a data acquisition instrument (21), a first rotating speed sensor group for acquiring the crankshaft (1) and the driving shaft (8) and a second rotating speed sensor group for detecting the driving shaft (8), the front pump camshaft (9) and the rear pump camshaft (10); the data acquisition instrument (21) is electrically connected with the first rotating speed sensor group and the second rotating speed sensor group respectively to acquire data.
3. The rotation speed fluctuation measuring device of the camshaft of the high-pressure oil pump according to claim 2, characterized in that: the first rotating speed sensor group comprises a shock absorber (3), an angle marking instrument I (4) and an angle marking instrument II (6); wherein the damper (3) is arranged at the end part of the crankshaft (1); the angle marking instrument I (4) is arranged on the shock absorber (3); the angle marking instrument II (6) is arranged at the end part of the driving shaft (8); wherein, the angle marking instrument I (4) and the angle marking instrument II (6) are electrically connected with the data acquisition instrument (21).
4. The rotation speed fluctuation measuring device of the camshaft of the high-pressure oil pump according to claim 2, characterized in that: the second rotating speed sensor group comprises a positioning gear (11), a testing gear I (13), a testing gear II (16), a rotating speed sensor I (18), a rotating speed sensor II (19) and a rotating speed sensor III (20); wherein the positioning gear (11) is arranged on the driving shaft (8); the test gear I (13) is arranged on the front pump camshaft (9); the test gear II (16) is arranged on the rear pump camshaft (10); the positioning gear (11), the testing gear I (13) and the testing gear II (16) have the same modulus and are provided with a missing tooth, and the positions of the notches in the initial state are uniform; wherein, rotational speed sensor I (18), rotational speed sensor II (19), rotational speed sensor III (20) all with data acquisition instrument (21) electric connection.
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| CN202010358435.9A CN111561414B (en) | 2020-04-29 | 2020-04-29 | Method and device for measuring rotation speed fluctuation of camshaft of high-pressure oil pump |
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| CN202010358435.9A CN111561414B (en) | 2020-04-29 | 2020-04-29 | Method and device for measuring rotation speed fluctuation of camshaft of high-pressure oil pump |
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| CN111561414A CN111561414A (en) | 2020-08-21 |
| CN111561414B true CN111561414B (en) | 2021-05-04 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4021886A1 (en) * | 1990-07-10 | 1992-01-16 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
| CN1298986C (en) * | 2005-04-29 | 2007-02-07 | 清华大学 | Method for detecting phases of camshaft and engine in four cylinders motor electromechanical controlled |
| DE112006002739A5 (en) * | 2005-08-09 | 2008-07-10 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Reciprocating internal combustion engine and method for determining the wear of a arranged between the crankshaft and camshaft transmission element |
| CN101881233B (en) * | 2010-03-19 | 2013-02-13 | 清华大学 | Engine misfire detection method and detection system thereof |
| CN206194273U (en) * | 2016-10-13 | 2017-05-24 | 北京电子科技职业学院 | Engine signal wheel sensor semi -physical simulation teaching system |
| CN206608239U (en) * | 2017-02-06 | 2017-11-03 | 山东鑫亚工业股份有限公司 | A kind of automatically controlled single cylinder diesel signal pickup assembly |
| CN109236483A (en) * | 2018-11-02 | 2019-01-18 | 湖北康利安动力科技有限公司 | A kind of diesel engine EFI control synchronous signal acquisition device |
| CN109238731B (en) * | 2018-11-07 | 2023-12-01 | 河南柴油机重工有限责任公司 | Online timing detection device for gas distribution and oil injection of internal combustion engine |
| CN109139323B (en) * | 2018-11-07 | 2023-09-01 | 河南柴油机重工有限责任公司 | Device and method for detecting phase and oil supply time of cam shaft of composite oil injection pump |
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