Fuel Injection Pump Research Articles

STUDYING THE EFFECT OF MAGNETIC FLUX ON DIESEL FUEL LINE ON SOME PERFORMANCE AND EMISSION OF DIESEL ENGINE

This study aimed to investigation was carried out to evaluate the performance and product emission of four cylinder 4- stroke water cooled direct injection (DI) diesel engine fueled by permanent magnet exposed diesel fuel compared with diesel fuel (DF). Three levels of magnet field intensity were used including Diesel fuel exposer to 3000 Gauss (DG3), Diesel fuel exposer to 5000 Gauss (DG5) and Diesel fuel exposer to 9000 Gauss (DG9) fuel respectively. Permanent magnetic device was employed and installed on fuel line before interring high pressure fuel injection pump . The engine run at constant speed 1500rpm(revolution per minute) and loaded by two levels 4.5 kW and 9 kW represented as L1and L2 respectively. Results obtained showed that fuel DG5 registered an increased in thermal efficiency(TE) about 20.09% at load L1 compared with DF. Maximum reduction in brake specific fuel consumption (bsfc) about 12.12%, when using DG5 fuel at load 1 compared to DF fuel. All exhaust emission Unburned Hydrocarbon (UHC), Carbon Monoxide (CO), Carbon Dioxide (CO2),Particular Maters (PM), and Nitrogen Oxides (NOx) are decreased when diesel fuel treated with different magnetic intensities 3000,5000 and 9000 Gauss. Compared with conventional diesel fuel. Maximum reduction in PM,HC,NOx,CO2,and CO about 16.56-27.08%, 3.89–64.26%, 4.79–7.91%, 4.05-5.71and 11.46-53.48% respectively. CO2 emission was increased by 1.65-4.28 at DG5 with L1 and L2 respectively due to the operating conditions.

Diesel Control Strategy in Dual-Fuel Engine

Dual-fuel engines are capable of operating using a mixture of two different fuels. Generally, the primary fuel is a gaseous fuel (CNG, LPG, Hydrogen), while diesel is used as a pilot ignition source, i.e. functioning on heat of compression and not a spark plug. There have been a few dual-fuel engine strategies to control the speed of the engine based on varying loads, but these require the addition of complex mechanisms to the existing systems. This paper discloses a methodology for controlling the diesel quantity during dual-fuel operation. According to the engine speed and accelerator pedal position, a gaseous fuel injector in the system injects a predetermined quantity of gaseous fuel. Based on the regulated quantity of gaseous fuel, the intake manifold creates an air-gas fuel mixture. The air-gaseous fuel mixture and a metered quantity of diesel are delivered to the combustion chamber via the intake manifold, fuel injection pump, and other components. The governor and fuel injection pump work together to measure the quantity of diesel according to speed and load conditions. During dual-fuel operation, the governor regulates engine speed by controlling the quantity of diesel delivered to the engine based on speed and load conditions. Keywords: Dual-fuel, Control Strategies, Off-Road Engines, Combustion, Emissions, Diesel Replacement

Investigation Lubricity Performance of Lubricating Oil Used in Marine Diesel Engine—Fuel Injection Pump

Diesel engines commonly suffer from oil contamination by fuel and other chemicals during operation and maintenance. This contamination alters the oil’s lubricating properties, leading to increased wear, corrosion, and other potential problems. Therefore, it is crucial to understand how oil degrades and becomes contaminated due to different replacement strategies is crucial for both engine operators and manufacturers. This study focuses on the impact of fuel dilution on specific properties of engine oil under real-world operating conditions in a marine diesel engine. Oil samples were collected regularly from the crankcase of the engine fuel injection pump and tribological tests were performed. These tests aimed to assess how marine gas oil affects the oil lubricity performance and how it maintains its useful life. The results confirm that diesel dilution primarily affects the oil lubricating abilities as well as overall performance.

Discussion on the Influence of Friction and Wear on the Reliability of Marine Diesel Engines

In view of the impact of friction and wear on the reliability of marine diesel engines, this article discusses the main causes of wear in marine diesel engines when analyzing the specific effects, including the impact of average effective pressure on friction loss, the impact of rotational speed on friction loss, the impact of cylinder number on friction loss, the impact of oil viscosity and cooling system temperature, and the impact of fuel injection pump pressure on friction loss The impact of the number of piston rings on diesel engines. In the analysis and discussion of the impact of friction and wear on the reliability of marine diesel engines, relevant suggestions were proposed for fault diagnosis, such as the application of the following diagnostic techniques: internal machine equipment gear wear fault analysis, bearing melting wear fault analysis, bearing wear deformation fault analysis, bearing pitting peeling fault analysis, diesel engine piston wear fault analysis, etc, And the following measures to avoid wear issues: reasonably reducing the speed of diesel engines, scientifically reducing the number of piston rings, and continuously optimizing the lubrication system.

ВОЗМОЖНЫЕ МЕРЫ ПОВЫШЕНИЯ СРОКА СЛУЖБЫ ОСНОВНЫХ ЭЛЕМЕНТОВ ТОПЛИВОВПРЫСКИВАЮЩЕГО НАСОСА ДИЗЕЛЯ

During the operation of a high-pressure fuel injection pump, the friction surfaces of the main elements are subjected to various mechanical, thermophysical and hydroabrasive effects, which increases the wear rate of precision elements and reduces the cyclic fuel supply through the cylinders. The purpose of the research is to increase the resource of the main elements of in-line high-pressure fuel pumps by modernizing the power supply system. The main factor affecting the performance of precision elements is the presence of carbovalt in hydrocarbon fuel, that is, mechanical impurities in the form of an abrasive that circulate throughout the entire circuit of the power supply system, can pass through the filter element and get into the junction of precision elements during the injection cycle, where they are pinched and abraded work surfaces. In addition to mechanical impurities, hydrocarbon fuels may contain surfactants such as sulfur, phosphorus, etc. Under certain conditions, this also accelerates the wear rate of friction pairs, especially at temperatures above 50°C. With an increase in temperature, the lubricity of hydrocarbon fuels decreases, since sulfur compounds are activated, which destroy the structured surface at the boundary of friction pairs. To reduce this effect, it is proposed to limit the increase in temperature in the diesel power system by installing a radiator with a fan. With temperature limitation in the diesel fuel system, the wear intensity will be lower, the viscosity will be consistently higher by 2 times or more, which will reduce fuel leakage in mating surfaces. The above analytical expressions indicate that the size of the fuel leakage depends on the Reynolds number. With an increase in viscosity, the Reynolds number decreases several times, while the consumption coefficient and fuel leakage through the gaps of the friction pairs are significantly reduced. The proposed measure makes it possible to preserve the lubricity of the fuel, reducing wear and increasing the service life of the main elements of the fuel injection pump.

Numerical Analysis of the Structural and Flow Rate Characteristics of the Fuel Injection Pump in a Marine Diesel Engine

A reciprocating fuel pump system was investigated using a modeling approach. The diesel pump system comprises a variable-sized barrel and plunger. This study investigates the effect of diesel, propane, and DME fuels on the plunger barrel’s deformation and flow rate characteristics. It compares the barrel and plunger displacement as a function of working pressure. Based on the multi-field coupling theory, a numerical fluid–solid thermal coupling model was developed to characterize the operational fluctuations in deformation and clearance. Due to the distinct deformation patterns of the two components, the appropriate clearance for the pump’s head and stem must be set independently. In addition, significant AMESim parameters compared and confirmed the discharge flow rates of three distinct fuels. The results show that the maximum displacement for the plunger stem was 0.00266 mm at 7.5 mm from the top of the stem, which was 6.94% lower than the literature result. The DME fuel showed flow stability initially (from 0.0 to 0.4 s) when using a plunger diameter of 23.85 mm. According to the plunger diameters, the marine fuel injection pump’s discharge flow rates increased, minimizing the wearing between the barrel/plunger. The research findings revealed that the suggested structural and flow rate model is recommended for alternative marine fuel applications.

KAJIAN EKSPERIMEN PENGARUH DIAMETER PLUNGER POMPA INJEKSI BAHAN BAKAR PADA PERFORMA DAN GAS BUANG MESIN DAIHATSU TAFT DIESEL DL62

For classic car lovers, the appearance of the Daihatsu Taft in the nineties was no less interesting than today's SUVs. However, the power is not comparable, because the Daihatsu Taft diesel engine still uses old technology. This research is an attempt to improve the performance of old diesel engines, which do not use common rail systems. Specifically, to determine the effect of modifying the size of the plunger of the fuel injection pump, on engine power and torque, fuel consumption and exhaust gas opacity. The analysis was carried out through a comparative study of the performance of standard machines and machines with modified plunger sizes I and II which were larger than the standard plunger diameter. Testing the performance of the machine using a Dastek Dynamometer 2WD Plate Roller. The results showed that the larger the plunger diameter of the injection pump, the effect of increasing power, torque, fuel consumption rate and exhaust gas opacity as well as the efficiency of the Daihatsu Taft DL62 diesel engine. The increase in exhaust gas opacities of modified engines does not exceed and is still far below the maximum threshold according to the Regulation of the State Ministry of Environment No. 5 of 2006 concerning Thresholds of Exhaust Emissions of Old Motor Vehicles. The emission test method uses ISO 11614

Varnish Formation and Removal in Lubrication Systems: A Review.

This study presents the current literature regarding the investigation of varnish contamination among the various types of lubricant contaminations. As the duration of use of lubricants increases, the lubricant deteriorates and may become contaminated. Varnish has been known to cause filter plugging, sticking of the hydraulic valves and fuel injection pumps, flow obstruction, clearance reduction, poor heating and cooling performance, and increased friction and wear in various lubrication systems. These problems may also result in mechanical system failures, performance degradation, and increased maintenance and repair costs. To improve the problems caused by varnish contamination, an adequate understanding of varnish is required. Therefore, in this review, the definitions and characteristics, generating machinery, generating mechanisms, causes, measurement methods, and prevention or removal methods of varnish are summarized. Most of the data presented herein are reports from manufacturers related to lubricants and machine maintenance that are included in published works. We expect that this summary will be helpful to those who are engaged in reducing or preventing varnish-related problems.

Impact of Emission Control Systems for Heavy Equipment and Power Plants on Global Warming

The article outlines the study on emission control systems from various diesel engines. The study was carried out for the heavy equipment and power plants operations to meet the environmental regulations. The purpose of this paper is to examine various emission control systems, how it operate at low emission level and their malfunctions. As the world strive for global warming regulations, there is a need to consider various emission control systems operating at low emission level to minimize the problems of the environment hazards. Internal combustion engines are characterized for producing exhaust emissions, mainly used in industries, transportation, power production and machinery. CAT Caterpillar ET 2019C Diagnostic Electronic Tool was used on heavy equipment and Perkins EST 2018A v1.0 Diagnostic Tool used on the power generating plants to detect various faults on emission control systems. Most of the emission produce were from the defective emission control systems thus fuel injection pump, fuel injectors, induction and exhaust manifolds design, positive crankcase ventilating systems, turbocharger and catalytic convertors. The Study was conducted in Mali-Tombouctou Region within UN Mission area and to examine various types of heavy equipment and different capacity of power plants emission control systems, under Ghana Engineer Company serving and providing engineer support for the Mission. The study recommend that the replacement of component or system used for repair be genuine service part to maintain the quality for emission control systems. All emission control system parts must be scheduled for regular inspections. Any part that fails under operation need to be replaced or repaired to reduce emission. Owners and operators normally don’t comply with and report emission issues. The study adds to the existing knowledge of emission control in our environment to reduce associated environmental health issues and global warning.

Retracted: Extraction Methods and Implementation Technologies of Fuel Injection Pump Cam Profile Characteristics

Retracted: Extraction Methods and Implementation Technologies of Fuel Injection Pump Cam Profile Characteristics

Concept of Vibroacoustic Diagnostics of the Fuel Injection and Electronic Cylinder Lubrication Systems of Marine Diesel Engines

Abstract Although direct measurements of the fuel injection pressure and the travel of the injector needle in conjunction with measurements of the valve train mechanism timing can provide complete diagnostic information about the technical conditions of the fuel injection and valve train systems, this requires the installation of sensors and other equipment directly into the systems, which is possible within research laboratories but is generally forbidden during operation of the ship. Malfunctions in the fuel injection and valve train systems can also be identified from the indicator diagrams of an engine operating cycle, expressed as P(V) and P(deg) diagrams. The basic parameters of the engine operating cycle, such as the maximum combustion pressure Pmax, compression pressure Pcompr, and indicated mean effective pressure IMEP, can also be used to indicate deviations from proper engine operation. Using a combination of a vibration sensor with an in-cylinder gas pressure sensor widens the capabilities of diagnostics for marine diesel engines under operational conditions. A vibration sensor with a magnetic base can help in determining the timings of the lifting and landing of the injector needle, fuel delivery by the fuel injection pump, opening and closing of the circulation of heated heavy fuel oil, and opening and closing of the gas distribution valves. This also offers a promising solution for diagnostics of the cylinder lubrication oil injectors. The proposed approach allows valuable information to be received during engine operation in accordance with the principle of non-destructive control, and can help in early detection of possible engine malfunctions.

Damage Analysis of Plunger Barrel on Performance of Fuel Oil Injection Pump on Generator Ship MT. Vijayanti

Diesel generator is a machine that can convert mechanical energy into electrical energy, diesel generator has an important role in supporting operational activities on board. The function of the diesel generator is to supply electrical energy, which is comprehensive in the electrical equipment on board. The work process of each part and component on the diesel generator must be properly maintained and checked and maintained so that each part and component of the engine can work optimally according to their respective functions. The purpose of this research is to find out and analyze and find a solution to why the working hours of the plunger barrel component exceed the usage limit and why the maintenance of the fuel oil injection pump pressure area for leaks is still lacking. The research method with research approach uses qualitative methods. Sources of data collected and used in this study were obtained from case studies, problem-solving and qualitative descriptive. Methods of collecting and withdrawing data using observation, interviews, literature study, and documentation. The discussion of this study carried out observations of checking to start from the plant maintenance system (PMS) by the previous crew to the fuel system starting from the fuel tank to the purifier which is directly related to the running of the fuel system at the fuel oil injection pump, as well as checking the fuel injection pump leaking which hinders from performance fuel oil injection is not optimal and makes the fuel pressure drop. The results of the discussion set and reschedule PMS and perform plunger barrel maintenance as well as overhaul the fo purifier and perform maintenance based on working hours. The conclusion is that the plunger barrel working hours exceed the usage limit due to delays in the implementation of PMS and the occurrence of leaks in the fuel oil injection pump area due to: damage to the bowl and main seal ring on the fo purifier, causing the process of separating fuel and dirt from the storage tank to the daily tank into a lot of mixed mud.

Vibrodiagnostics of marine diesel engines in IMES GmbH systems

ABSTRACT A vibration sensor as a part of the IMES GmbH diagnostic systems provides enhanced diagnostic capabilities for marine engines. Although direct measurements of the fuel injection and valve train system parameters could give complete diagnostic information about their technical conditions, such measurements usually are forbidden at navigation. Application of the vibration sensor provides reasonable alternative to direct measurements as it enables detection of the injector’s needle rise and landing timing, as well as the timing of the start of a fuel delivery and fuel cut-off by the high-pressure fuel injection pump. The heated heavy fuel oil circulation opening and closing timing together with the intake and exhaust valves closing and, for some cases, opening timing could also be measured by vibration sensor. This article shows examples of diagnostics of the fuel injection and the valve-train system various malfunctions using vibration diagrams and a mathematical simulation of the engine operating process.

Experimental Investigation into the Effects of Fuel Dilution on the Change in Chemical Properties of Lubricating Oil Used in Fuel Injection Pump of Pielstick PA4 V185 Marine Diesel Engine

The engine oil contamination caused by various chemical elements and fuel is an important problem. As a consequence, the engine oil loses its tribological properties, engine lubrication worsens and may lead to potential problems such as excessive wear, corrosion, etc. For that reason, the study of oil degradation and contamination due to the replacement strategies is of special interest to the engine operators and engine manufacturers. In this paper, the chemical elements and fuel dilution of engine oil are analyzed under real engine operating conditions. This research is focused on the fundamental question: how is the chemical performance of lubricant components impacted by diesel dilution? Various tribological tests were performed on regularly collected samples from the fuel injection pump of a Pielstick PA4 V185 marine diesel engine. These tests assessed the influence of fuel on the lubricating oil chemistry performance and useful residual life. Tests included variations in lubricant density, viscosity, flash point temperature and chemical components for 10 samples taken in the following hours of engine operation. Results suggest that diesel dilution only slightly affects chemical additive performance. Most of the examined chemical elements remained at a negligible level (below 1 ppm) in the case of elements whose content was greater, and the changes were either negligible (Al, Fe, MG, Si) in the grits from 1 to 5 ppm or higher (Ca, P, Zn, C), ranging from tens to several hundred ppm. On the other hand, the kinematic viscosity changed significantly from 89.8 to 12.0 cSt at 40 °C or from 9.8 to 2.9 cSt at 100 °C. The change in flash point, although significant from 236 (for fresh oil) to a value below 100, does not exceed the limit values. To sum up, the study concluded that the reduction in oil change intervals for this engine is worth considering under the given operating conditions.

Экспериментальная оценка работы топливных насосов газодизельных ДВС с использованием аппаратно-программного и диагностического комплексов «Газодизель-Pro» и «MT Pro 4.1»

The main aspects of testing modern high-pressure fuel pumps (fuel injection pumps) of gas-diesel internal combustion engines are considered. A hardware and software complex based on a test bench for the fuel injection pump of a gas-diesel engine is proposed. The research is carried out in order to determine and register the fuel injection pump parameters necessary to optimize the process of diesel fuel injection into gas diesel. The block diagram of the hardware and software complex and the results of bench tests of the working process of a gas-diesel internal combustion engine are presented. Keywords: GAS DIESEL, TESTS, INSTALLATION, STAND, IGNITION DOSE, HIGH-PRESSURE FUEL PUMP, PIPELINE, COMBUSTIBLE MIXTURE, ENERGY INDICATORS

РЕЗУЛЬТАТЫ СТЕНДОВЫХ ИСПЫТАНИЙ ПЛУНЖЕРНЫХ ПАР ВОССТАНОВЛЕНЫХ С ПРИМЕНЕНИЕМ НАНОКОМПОЗИЦИОННОГО ХРОМИРОВАНИЯ

The article presents the results of bench tests of serially manufactured plunger pairs of high-pressure fuel pumps (fuel injection pumps) of YAMZ-238ND3 diesel, restored using existing technology with the use of chromium-based electroplating and restored using the proposed technology with the use of chromium-based nanocomposition electroplating. The studies were conducted according to the OST 23.1-364-81 on mass-produced plunger pairs, plunger pairs restored according to the standard technology of restoration at repair enterprises and plunger pairs restored according to the proposed technology in the laboratory of applying hardening coatings of the Saratov State Agrarian University named after N. I. Vavilov. The method of bench accelerated wear tests implied the addition of abrasive particles to diesel fuel. The abrasive material consisted of quartz particles with dimensions of 3...5 microns at an abrasive concentration of 0.015 g/kg. The tests were carried out using the stand KI-22205-01 GOSNITI at the number of revolutions of the cam shaft 830 min-1. The test time was 130 hours. Every 10 hours, the starting cycle fuel supply was recorded on the reference fuel pump, which did not participate in the testing process. After the tests, the plunger pairs were checked for water tightness using the installation of the KI-759 model. The limiting value limiting the operability of the plunger pairs of the YAMZ-238ND3 injection pump was the starting cyclic fuel supply, which should not be lower than 180 mm3/cycle. As a result of the tests, it was found that all the tested fuel injection pumps did not reach the limit state. At the end of the tests, the cyclic starting supply of plunger pairs restored by nanocomposition galvanic chrome plating decreased by an average of 7.6%; restored by base chrome plating – by an average of 10.5%; serial – by an average of 13.8%. The hydraulic density of plunger pairs restored by nanocomposition galvanic chrome plating averaged 18 s, restored by base galvanic chrome plating – 16 with, serial – 15 s.

Formation of a Flow-Line Technical Diesel Engine by the Method of Safety-Free Diagnostics

The analysis of diagnostic methods of diesel engines is given. The principle of diagnostics by certain methods, parameters, by which the diagnostics of fuel injection equipment is conducted, as well as disadvantages of one or another method are considered. The main causes of derangements in the nodes of the fuel injection equipment of diesel engines are determined. The examples have proved that the direct diagnostics methods are the most effective in determining correlation dependencies, for example, indicating the workflow in a diesel cylinder. It is particularly established that the methods of technical diagnostics do not require dismantling of the fuel injection equipment and have proven themselves to be versatile and operative, allowing to comprehensively evaluate the condition of the diesel. The methods of non-separable diagnostic of the condition of a diesel engine are described in detail, the features of such indirect diagnostic methods as vibration, acoustic, indirect indicating by determining the voltage in the cylinder head studs, estimation of the wear rate of component parts with a metal content in engine oil, as well as diagnosing with uneven rate speed of the crankshaft. The vibro-acoustic diagnostic method of a diesel engine can be used to determine the technical condition of such elements as a diesel fuel injection pump , nozzles, and a fuel-priming pump. In addition, the characteristics of motor testers, highly specialized testers and auto scanners are given. A diagnostic feature using a computer auto scanner is that it allows evaluating the condition of nodes in a comprehensive manner, that is, taking into account the mutual influence of derangements on each other. It is noted that the methods that do not require disassembling can be considered the most effective, and the most accurate assessment of the technical condition of the diesel fuel system can be given using the diagnostic method according to the parameters of work processes.

Experimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle

The fuel injector is an important component of the diesel engine. It has a great influence on the atomization of diesel fuel injection, the formation of mixed gas, and combustion emissions. Due to the current nozzle structure, processing level, and the internal hydraulic conditions of each nozzle, there are certain differences between the injection rules of each hole, and there are few methods to quantify the quality of the injector using mathematical methods in engineering. Based on the principle of spray momentum, this paper measures the injection characteristics of each hole of four five-hole pressureless chamber injectors of the same model and analyzes the circulating fuel injection volume and flow coefficient of each injector and each hole under different working conditions. It is proposed to evaluate the quality of the injector with the average circulating fuel injection volume, average flow coefficient, and nonuniformity as indicators. The test results are as follows: there are differences in the circulating fuel injection volume and flow coefficient between each hole of the same fuel injector. With the increase of the fuel injection pump speed, the average circulating fuel injection volume of each hole differs by 2.8%–47.5%, and the average flow coefficient differs by 3.7%–30%; as the fuel injection volume increases, the average circulating fuel injection volume of each injector differs 1.8%–36%, and the average flow coefficient difference is 2.5%–28.7%. The circulating fuel injection volume and flow coefficient of different fuel injectors of the same model are different. With the increase of the fuel injection pump speed, the average circulating fuel injection volume of each injector differs by 3.5%–9.6%, and the average flow coefficient differs by 1.4%–5.7%; as the fuel injection volume increases, the average circulating fuel injection volume of each injector differs 0.3%–5.5%, and the average flow coefficient difference is 2.8–4.2%. The relative flow coefficient of each hole differs from 0 to 0.02, and the nonuniformity differs from 1.8% to 16.9%. The relative circulating fuel injection amount of each hole differs from 0.02 to 0.1, and the nonuniformity differs from 1.1% to 6.9%. The relative flow coefficient of each hole and its nonuniformity is smaller than the relative circulating fuel injection volume of each hole and its nonuniformity.

Дослідження змащувальної здатності дизельного та авіаційного палива на паливному насосі високого тиску

This paper presents comparative experimental study’s results of diesel fuel and aviation fuel effect on operational properties of a high-pressure fuel pump of a common rail injection system. The two identical fuel injection systems mounted on a test bed of the fuel injection pumps were prepared for the experimental durability tests. The lubricity properties of diesel fuel and aviation fuel (Jet-A1) were studied using the High-Frequency Reciprocating Rig (HFRR) method. The values of wear scar diameter (WSD) obtained with Jet-A1 fuels were compared to the respective values measured with the reference diesel fuel. The microscopic photographs of the wear scar diameters obtained on above mentioned fuels are presented in the paper. The test results showed that long-term (about 300 hours) using aviation fuels produced a negative effect on the durability of the high-pressure fuel pump. Due to the wear of plunger-barrel units the decrease in the fuel delivery rate occurred of about 6.7 % operating with aviation fuel. The average friction coefficients of Jet-A1 fuels were higher than that of the normal diesel fuel.
 Keywords: diesel fuel, aviation Jet-A1 fuel, lubricity, plunger-barrel units, wear scar diameter

Extraction Methods and Implementation Technologies of Fuel Injection Pump Cam Profile Characteristics

Because the traditional camshaft measurement methods cannot be applied to the injection pump cam, in order to improve the measurement automation of injection camshaft, an accurate extraction method of the characteristic parameters of the injection cam profile is proposed in this paper. In this method, the phase error optimization is realized by the angle precise rotation matching of the actual lift data. The optimization is realized by the Lagrangian polynomial interpolation algorithm based on the moving window. The goals of precise measurement of the peach point phase of single high point cam and accurate acquisition of the back dead point phase of high point arc segment cam are realized. Compared with the precision of high-precision measuring equipment, the method can extract the lift and phase angle error of the cam accurately and stably.