China Yuchai Lauches 10 Diesel and 4 Gas New Engines – S,K and Y Platforms
China Yuchai Founded in 1951, GYMCL has established a reputable brand name, strong research and development team and significant market share in China with high-quality products and reliable after-sales support. In 2017, GYMCL sold 367,097 engines and is recognized as a leading manufacturer and distributor of engines in China. China Yuchai, Guangxi Yuchai Machinery Company Limited ("GYMCL"), engages in the manufacture, assembly, and sale of a wide variety of light-, medium- and heavy-duty engines for trucks, buses, passenger vehicles, construction equipment, marine and agriculture applications in China. GYMCL also produces diesel power generators. The engines produced by GYMCL range from diesel to natural gas and hybrid engines. Through its regional sales offices and authorized customer service centers, the Company distributes its engines directly to auto OEMs and retailers and provides maintenance and retrofitting services throughout China. Yuchai International SINGAPORE, Jan. 12, 2018 /PRNewswire/ -- China Yuchai International Limited (NYSE: CYD) ("China Yuchai" or the "Company"), a leading manufacturer and distributor of engines for on- and off-road applications in China through its main operating subsidiary, Guangxi Yuchai Machinery Company Limited ("GYMCL"), announced today that it has launched 14 new engines compliant with China's more stringent National VI emission standards. GYMCL's new National VI engines include 10 diesel and 4 natural gas engines with a power range from 100 to 650 horsepower among 3 platforms, namely S, K, and Y, which together stands for "blue sky", which symbolizes GYMCL's commitment to developing clean and efficient engines. The S platform engines address the market for medium- and light-duty engines with models YCS04, YCS06 and YCS04N. The K platform engines cater to the medium- and heavy-duty markets with models YCK05, YCK08, YCK09, YCK11, YCK13, YCK13N, YCK15N and YCK07N. The Y platform engines are for the light-duty engine market with models YCY20, YCY24 and YCY30. Launching engines that meet or exceed next generation emission standards has been a key strategy for China Yuchai to create a technological edge and market leadership in the market for commercial vehicle ("CV") engines in China, the largest CV market in the world. Representatives of original equipment manufacturers ("OEMs"), suppliers, vendors as well as government and industry officials attended the launch ceremony hosted by GYMCL's Chairman, Mr. Ping Yan and President, Mr. Qiwei Wu. They include senior executives from leading CV OEMs such as Dongfeng Commercial Vehicle Co., Ltd., Liuzhou Motor, C&C Truck, Foton Motor, Jianghuai Automobile (JAC), Shaanxi Automotive Group and Yutong Bus. Other prestigious guests include Dr. Wanhua Su of the China Academy of Engineering, Mr. Gang Hou, Deputy Director of Guangxi Ministry of Industry, Mr. Kaiguo Li, Chairman of the China Automotive Engineering Research Institute, Mr. Michael Laske, CEO of AVL China, Mr. Thomas Reinhart, Director of the Southwest Research Institute, Mr. Yu-ming Miao, Deputy General Manager of Bosch Automotive Diesel Systems Co., Ltd. and Mr. Tobias Posner, Director of the ThyssenKrupp Forging Technology Group. At the ceremony, GYMCL signed strategic partnership agreements with 22 truck OEMs including Dongfeng Commercial Vehicle Co., Ltd., and 8 bus OEMs including Yutong Bus, as well as 52 key components suppliers. China's National V emission standards were fully implemented across the nation in 2017. The more stringent National VI emission standards are expected to be implemented by mid-2020 according to the Ministry of Environmental Protection. Mr. Weng Ming Hoh, President of China Yuchai, commented, "We are committed to the development of environmental-friendly technologies. The launch of our new product portfolio demonstrates that we are at the forefront of emission technologies, and our R&D and engineering expertise enhances our leadership in the CV engine market. In addition, our strong sourcing capability continues to enable us to fulfil our system design and engineering with world-class components." Safe Harbor Statement This news release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The words "believe", "expect", "anticipate", "project", "targets", "optimistic", "confident that", "continue to", "predict", "intend", "aim", "will" or similar expressions are intended to identify forward-looking statements. All statements other than statements of historical fact are statements that may be deemed forward-looking statements. These forward-looking statements including, but not limited to, statements concerning the Company's operations, financial performance and condition are based on current expectations, beliefs and assumptions which are subject to change at any time. The Company cautions that these statements by their nature involve risks and uncertainties, and actual results may differ materially depending on a variety of important factors such as government and stock exchange regulations, competition, political, economic and social conditions around the world and in China including those discussed in the Company's Form 20-Fs under the headings "Risk Factors", "Results of Operations" and "Business Overview" and other reports filed with the Securities and Exchange Commission from time to time. All forward-looking statements are applicable only as of the date they are made and the Company specifically disclaims any obligation to maintain or update the forward-looking information, whether of the nature contained in this release or otherwise, in the future. Starlight Power factory is a manufacturer in diesel generator set focused on high quality product for more than 44 years. Genset power range is from 20kw to 3000kw. Welcome to send inquiry by email [email protected].
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New Joint Venture Germany MTU & China Yuchai
MTU is world famous engine, Germany engine brand. China Yuchai, Guangxi Yuchai Machinery Company Limited ("GYMCL"), engages in the manufacture, assembly, and sale of a wide variety of light-, medium- and heavy-duty engines for trucks, buses, passenger vehicles, construction equipment, marine and agriculture applications in China. GYMCL also produces Yuchai diesel power generators. MTU Yuchai Power, a joint venture between Rolls-Royce Power Systems and Chinese diesel engine manufacturer Guangxi Yuchai Machinery Company, has unveiled its first engine. Yan Ping, chairman of Guangxi Yuchai Machinery, and Andreas Schell, president of the Rolls-Royce Power Systems, launched the first MTU Series 4000 engine, which has been manufactured in Yulin in southern China. The joint venture received all regulatory approvals last year, and since then, Rolls-Royce said “preparations for the start of production have been in full swing”. “Modifications to an existing production building in Yulin have been completed, production facilities installed and logistics and quality processes agreed on. “Members of the workforce from Yuchai with the required experience have completed training in MTU engine production in Friedrichshafen that will enable them to fulfil their future responsibilities. In future, they will manufacture MTU engines in Yulin in accordance with the same quality standards that apply in Germany and the US.” Andreas Schell added: “With the MTU Series 4000 engine, we have precisely the kind of product the market in China requires.” “The constant increase in the demand for energy in China and the neighbouring countries, in addition to the strong demand for energy resources, have created a market for power generation facilities and for the oil and gas industry. “The first engine manufactured in Yulin is an expression of the excellent working relationship and commitment of the joint teams. We are delighted that, in Guangxi Yuchai Machinery Company, we have found a partner that meets our needs precisely.” Yan Ping said: “We much value the partnership that is aligned with our group strategy of growing international competitiveness. We are committed to delivering optimal quality products for a growing customer base in the Chinese and international markets and looking forward to bringing our partnership to the next level.” The components needed to produce the engines at MTU Yuchai Power will initially come from Germany. Suppliers in China capable of delivering parts of the same quality will gradually be added at a later stage. “We will accept no compromises in terms of quality and delivery reliability. It is a responsibility we have towards the MTU generator and our customers,” said Schell. If have purchase plan, welcome to contact us by email [email protected]. Today Starlight will share the reason of fuel injector burning, hope it is helpful for you.
Fuel injector working principle The injector atomizes the diesel fuel and sprays it into the combustion chamber. The injector consists mainly of the nozzle and nozzle holder. The main parts of fuel injector are as follows: 1. Rod type filter 2. Cap nut 3. Compressing spring 4. Compression pin 5. Cap nut for fixed nozzle 6. Nozzle holder 7. Connect hole for fuel delivery 8. Nozzle holder 9. Connect tube for overflow 10. Shim 11. Pin 12. Nozzle bush There is no doubt that fuel injection nozzle burning will definitely influence the normal operation of generator set. If you find the related causes, you can quickly solve the problems. 1. Long time idling operation Due to the diesel engine keeps running slowly for a long time, the temperature in the cylinder is low, the fuel combustion is not sufficient, the combustion chamber and fuel injection nozzle are easy to form carbon deposition. So it leads to the deterioration of working conditions for fuel injection nozzle. Especially in winter, it is even more serious under the condition of cold climate. Because the combustion chamber has carbon deposition, heat dissipation is slow, which may cause spray orifice obstruction of the fuel injection nozzle and the oil drip phonomenon may happen. The fuel stays in the nozzle head for a long time, the local high temperature will make the nozzle and thermal insulation jacket burned. 2. The fuel is not clean Due to there are small particles of impurities in the fuel, the needle valve and needle valve body of the fuel injector will wear. It is possible that the needle valve will be stuck in the needle valve body.Because of needle valve lag, the fuel can’t be periodically, quantitatively and quickly sprayed into the combustion chamber, the oil drip phenomenon will appear, which may cause the fuel atomization is not good and the combustion speed is reduced. Due to the burning time of the nozzle is extended, which will make the fuel injection nozzle and the thermal insulation jacket burned. When such fault occurs, there will be black smoke and chattering phenomenon. 3. Fuel injection time is too late The fuel injection advance angle is too small which may cause the fuel injection time is too late. If it can’t be adjusted for a long time, the local high temperature will make the fuel injection nozzle and thermal insulation jacket burned. 4. Improper assembly If the nozzle insulation sheath is installed without cleaning, there will be a gap between the fuel injection nozzle and the insulation sheath. The gas enters into the gap, the heat insulation and cooling effect is reduced, which will cause the fuel injection nozzle and the insulation sheath burned. If the thermal insulation sheath is too tight, the nozzle will generate additional stress. Under the combined action of heat alternating load and high pressure of fuel injection, the nozzle will be broken and the needle valve will be stuck. In addition, if the insulation sheath can’t get installed during maintenance, the nozzle extends into the combustion chamber more than 4mm above the cylinder head bottom, the heat absorbed by the fuel injection nozzle will increase, which make the nozzle melted. 5. Improper use of generator set If it lacks of coolant liquid while the diesel generator is at work, the combustion chamber can’t be in good state of cooling, which will lead to the high temperature. This is also an important reason to cause the burning of fuel injection nozzle. Prevention As mentioned above, the fuel injection nozzle is one of the important equipment of diesel genset. For the nozzle maintenance, it is necessary to keep the fuel system clean and avoid purchasing the fuel from unreliable sources. If you also have purchase plan of diesel generator, please contact us by [email protected]. Today Starlight Power tells you which is better for Single Generator and Paralleling Generator.
If your power needs are large enough, you may wonder whether it’s better to go with a single, huge diesel generator, or split the burden between two or more smaller generators. For example, instead of a 1200kW generator, you could install three 400kW generators. This is called paralleling, and it can be a great option in the right circumstances. Here’s why: #1. Greater flexibility. It’s very likely the reason you’re buying a generator at all is the additional reliability, a hedge against an interrupted power supply causing a slowdown or halt to your business’s operations. With multiple generators, you don’t have to worry if one has to be shut down for maintenance. You simply shift the burden to the others and keep right on working. With just one generator, if it has to stop, so do you. 2. Can be more cost-effective. Obviously the economics will vary widely depending on brands, new vs. used generators, prices in your geographic location, etc. But all things being equal, once you breach a certain generator size, it becomes more economical to parallel than use a single unit. Specifically, once you go over the sizes of gas or diesel engines mass-produced for use in cars, as well, those engines are harder to come by and are thus more expensive. And the engine comprises more than half the cost of a generator. The threshold for diesel engines is 600kW and for gas engines it’s 150kW. 3. Can be more practical. Depending on your physical space, it may be easier to fit two or three parallel generators into a room than one oversized unit. Among large commercial generators, smaller capacities can mean the difference in 25 or more square feet per unit. 4. Easier on the generators. Load sharing among two or more generators can extend the life of each generator and avoid the risk of overburdening a single unit. For continuous usage, loads up to 80% generator capacity are ideal. If you have purchase plan of diesel generators, please contact us by email [email protected] or call us by phone +8613481024441 ( same as WeChat). Air blockage and elimination method
When the air bubbles from the oil outlet valve, it is judged that there is the air blockage fault in the engine fuel supply system, the starter can be continued to hit until the air in the pipeline is exhausted, indicating that the pipeline is not damaged and the engine can work normally. If during hitting the starter, there is always air exhausted, indicating that there is a leak in the oil supply pipeline. The method of eliminating air blockage is to find the leak site, seal well to eliminate the leak, and then eliminate the air in the system. If the air in the oil supply pipeline is blocked by evaporation of fuel molecule into fuel vapor due to very hot weather and low air pressure, this is a special case. People call it high temperature air blockage, this is another case. Foreign body blockage and elimination method When check out there is no oil or less oil from the oil valve, foreign body blockage can be judged. Check the blockage parts, you can use the method of hand oil pump to continue to check, when pulling the handle of the hand oil pump feel great resistance, can focus on inspection of fuel supply pipeline from fuel tank to hand oil pump, the blockage may be at the inlet of the fuel pipe in the fuel tank, foreign matter in the fuel tank blocked the oil inlet, the blockage part maybe is fuel filter, impurities or colloids in the fuel block the filter If the resistance is greater when pushing the hand oil pump, can focus on checking the oil supply pipeline from the hand oil pump to the high-pressure pump. The blockage may occur in the fine fuel filter. The way to check whether the centrifugal oil filter is working properly is to monitor the "buzz" of the diesel engine when its rotor continues to rotate just after shutdown. If the sound is working normally for a long time, if the sound of rotation is not heard, indicating that the fault occurs. When check ice blockage fault, it must be in Winter, maybe there is water in diesel oil. Common ice blockage fault part is in pipelines and fittings, the situation is more complex, warm pipeline, melting and freezing, if the pipeline is naturally open, it is not necessary to find the exact location of the ice blockage. After removing the foreign matter blockage, the fuel supply system should also be thoroughly cleaned, even the fuel tank should be cleaned. In order to prevent material resistance, attention should be paid to long-term injection of clean fuel oil in fuel tank. Water blockage and elimination method When the diesel engine is not stable enough, there is a fire phenomenon, even when the engine stops suddenly during operation, it can be judged that the diesel engine is blocked. Observing the exhaust pipe will find that the exhaust pipe continuously emits white smoke. When the exhaust pipe receives water droplets or drips more, the water blockage fault of the diesel engine can generally be judged. Water blockage means that there is water in fuel supply system and fuel tank. If can sure water blockage fault, should release water and oil which in bottom, and the engine should be started continuously by the starter to see if the water blockage fault can be eliminated. If it can not be removed, all remaining fuel should be discharged, and the fuel tank and fuel supply system should be thoroughly cleaned, and the fuel filter (core) should be replaced. After that, should pay attention to the addition of clean and anhydrous fuel and the possibility of water entering the fuel system should be excluded. The performance of water blockage is complex, which should be distinguished from the difficult faults of diesel engines such as leakage of combustion chamber. For example, the damage of the cylinder gasket leaks into the combustion chamber, and the moisture is discharged from the exhaust pipe. The diesel engine also works unsteadily. According to the degree of water leakage and the number of cylinders, the amount of drainage is different, and the working condition of diesel engine is also different. Therefore, it is necessary to apply experience and judge comprehensively according to many factors, such as engine operating time, common working conditions, medium consumption and so on. Hope the article can help you to solve the leakage faults in Perkins diesel generator set. If you are interested in diesel generator set, welcome to contact us by email [email protected], we will guide you to select the most suitable product. It’s important to get a qualified engineer to look after your diesel generators. However there are some things that you can do to reduce the chance of problems when you need your diesel gen set to work.
Here a few self-help ideas. Regular Start-Ups Implement a monthly generator test schedule. It will enable you to test for generator faults and make sure that systems and people are all ready to to their jobs. Check the battery and replace it if there are any signs of deterioration. Filters The fuel and lubricating oil filters in your generator will degrade whether or not it has been running. So make sure that they are changed in line with maintenance schedules at the minimum or more frequently if the operating environment demands it. Check Fuel Quality It’s easy for moisture to build up in the fuel tank of your generator and that can cause algae growth. You can buy algae inhibitors to stop the build-up from affecting the performance of your generator. If greater quantities of water get into the fuel tank then you may need to get a specialist fuel polishing company to pump out the fuel and clean it. Always check the tank for the sources of water infiltration before adding the fuel back. Supplier Check Make sure you have good relationships with suppliers of fuel, consumables and maintenance services, and the right contracts for your requirements. If there is a problem you might not want to rely on good will to get fuel supplies on the night of a long holiday in the winter. Hope above information is helpful for you during the use of diesel generator sets. Starlight Power also provides good quality diesel generator, such as open type genset, silent genset, trailer mobile genset, container generator. Welcome to send us your inquiry by our email [email protected] 640kw diesel generator manufacturer will answer for you.For person who use diesel generator, at some time, the purchased cost is less than usage cost, especially fuel consumption. Therefore, it is important key to save diesel fuel.
Base on the cognition of car diesel engine, many people think the fuel consumption of the generator set is in direct proportion to the load, and the greater the load, the more fuel is consumed. But is that really the case? Usually, fuel consumption of generator set is related to two aspects: one is the fuel consumption rate of the unit itself, which is usually unable to have a greater change; the other is the size of the load. For the purpose of fuel saving, many people control the load within the standard range of rated load, but the fuel consumption is still not ideal, why? What is relationship between fuel consumption and load on diesel generator set? In normal situation, when brand and engine model of diesel generator is same, the greater the load, the more fuel is consumed. Otherwise, the smaller the load, the less fuel is consumed. However, in special situation, it has to be another matter. The common operation is that when the load of the diesel generator set is 80% of the rated load, the fuel consumption is the lowest. If the load of the diesel generator set is 80% of the rated load, one liter of fuel will generate 3.5 kwh electricity. If the load progresses, the fuel consumption will increase. This is what people often say that the fuel consumption of diesel generator set is directly proportional to the load. But if the load is lower than 20%, the diesel generator set will be affected, not only the fuel consumption of the unit will be greatly improved, but also the generator set will be damaged. Therefore, it is not absolute that fuel consumption and load are positive. If you want to reduce the fuel consumption of diesel generator set, you can make the unit operate at about 80% of the rated load. If you operate at low load(lower than 50%) for a long time, the fuel consumption will increase and even damage the unit. The long-term operation of diesel generator set under 50% load will cause the following harms: 1) The unit is easy to deposit carbon 2) High failure rate of unit 3) Unit overhaul will be advanced 4) Oil consumption increases. So, it is very important to correctly treat the relationship between fuel consumption and load of diesel generator set. Which four aspects will mainly affect fuel consumption of generator? 1.Pressure inside the high pressure fuel pomp. The better the sealing, the greater the pressure, which will save fuel. If fuel pump is with low pressure and poor sealing, will make the effective stroke of the high-pressure fuel pump larger when it is working, and the fuel consumption is large due to insufficient diesel combustion. 2.Atomization of fuel injector. The better atomization, the smaller fuel injection hole, which will save fuel. When the nozzle is wear, its seal will be not good, and the fuel injection will be linear, which is obviously more than that of atomization. When the diesel fuel enters the engine, it will be discharged before combustion, so the fuel consumption is large. 3.Air pressure inside diesel engine cylinder. If cylinder pressure is low, the valve is poor, the fuel consumption will be large. If the water temperature in the diesel engine is too high, the compression ratio of the engine will be reduced, and some diesel oil will be discharged through high temperature, which will lead to high fuel consumption. 4.Turbocharged diesel engine has air leakage. Pressurized air pipe has air leakage, which causes the air pressure pushed into the high-pressure oil pump too low during exhaust gas recirculation. When the throttle is increased, the fuel pump can not reach the required fuel quantity of the engine, resulting in insufficient engine power, and the fuel consumption is large if the power is not enough.( Note: this only for turbocharged diesel engine). Here are some methods for you to save diesel oil on diesel generator set: 1.Increase the temperature of diesel engine cooling water. 2.Keep the best oil supply angle. 3.Ensure that the unit does not leak oil. 4.Diesel Oil purification before use. Jiangsu Starlight is a professional manufacturer in diesel generator set for more than 43 years, covering Cummins generator, Volvo, Perkins, Deutz, Yuchai, Shangchai, Doosan, Deutz, Ricardo, Weichai etc. Power range is from 20kw to 2500kw, frequency options 50Hz/60Hz. Alternator options: Stamford, Leroy Somer, ENGGA, Marathon, Siemens, Shangchai Kepu, as well as its own brand Starlight, protection level IP22~IP23. Welcome to contact us by email [email protected] or call us by mobile phone +8613481024441. Today Starlight Power generator manufacturer shares the difference among alternator and generator with you.
Alternator vs Generator Alternators and generators are two devices which generate electricity. An alternator can be called a type of generator. Although both these devices serve the same function, they are quite different in every other aspect. An alternator is a charging system for cars that produces electricity. Generators are used in the production of large-scale electricity. Both alternators and generators convert mechanical energy into electrical energy. The main difference between them is in regard to what spins and what is fixed. In an alternator, electricity is produced when a magnetic field spins inside the stator (windings of wire). In a generator, on the other hand, the armature or windings of wire spin inside a fixed magnetic field to generate electricity. Alternators are considered more efficient than generators. Alternators conserve energy by using only the energy that is needed, while generators use all the energy that is produced. Alternators have a higher output than generators. When it comes to polarization, alternators and generators are very different. While generators have to be polarized after installation, there is no need for polarization in alternators. Alternator brushes last longer than those of generators. This is because the brushes in an alternator are used only for carrying current to power the rotor and the slip rings they ride are smooth. There is another difference between generators and alternators when it comes to charging. An alternator will not charge a dead battery and if you do try to charge it, there is a possibility that it will burn out. A generator, however, can be used for charging a dead battery. There is also a difference in size as alternators can fit into a small space, while generators are larger. Summary: 1. An alternator, electricity is produced when a magnetic field spins inside the stator (windings of wire). On the other hand, the armature or the windings of wire in a generator spin inside a fixed magnetic field to generate electricity. 2.Alternators conserve energy by using only the energy that is needed. Generators use all the energy that is produced. 3.Alternators produce voltage when needed and generators produce voltage at all times. 4.Alternators generate a higher output than generators. Starlight Power has focused on high quality diesel generator set for more than 43 years. If you are interested or have purchase plan, please contact us by email [email protected]. When we consider purchase cost, we can buy used diesel generator, but we should also check its quality.
1) Typically used generators do not come with a warranty, however, it can be very advantageous to purchase a used model for a number of reasons. One of these advantages is, of course, cost. Often used generators, even with low hours on the engines, are substantially less than the cost of new generators with savings of anything up to about 50% compare to the cost of a new one. 2) Availability and quick installation: Another benefit of opting for used generators is that of availability. They can be bought and installed very quickly, you can simply purchase and arrange to ship immediately. 3) Diesel generators are built to last. Also, it is important to bear in mind that big name manufacturers build industrial strength equipment that is built to last so the risk is negligible. Generators have a long lifespan, built to carry out their function of providing essential power, whether it be prime, standby or emergency. Also depending on the age of the generator, it may still have some manufacturer’s warranty and in some cases, the dealer will provide some sort of guarantee. 4) Always use a trusted seller: The only potential downside of buying a used generator is just that, it is used and not new. You, therefore, have to trust the seller to provide such details, as when buying a used car, like history, condition and previous usage. This makes it essential to purchase from a reputable dealer, with experience and technical expertise, who have tested and repaired where necessary. Starlight Power is a manufacturer of diesel generator set in China, we have focused on high quality product for more than 43 years. We produce Cummins, Volvo, Perkins, Yuchai, Shangchai, Deutz, Ricardo. Power range is from 20kw to 2000kw. If you have purchase plan, welcome to contact us by [email protected] or call us by phone number +8613481024441 (sames as WeChat No.). Today Starlight Power generator manufacturer shares the abnormal sound of diesel generator.
1. Mechanical knocking Due to the wear of the moving parts of the diesel engine, the fit clearance is increased, and a large impact is generated during operation to generate a knocking sound. This knocking sound began to be slight and gradually became worse as the wear increased. Such knocking sounds generally occur periodically, accompanied by increased vibration of the diesel engine. In addition, the diesel engine parts are damaged, or the installation is improperly adjusted, there is an uncoordinated phenomenon during work, and abnormal knocking sound may occur, and this kind of sound generally appears suddenly. a. The knocking sound of main bearing When the main bearing nut is not tightened or loose, the main bearing bush wears seriously or burns out, or the improper adjustment of the assembly will increase the clearance between the bearing bush and the neck shoulder of the main shaft bushing. When the diesel engine is working, it will have an impact effect and knocking sound. b. The knocking sound of connecting rod bearing shell When the connecting rod bolt is not tightened, loose or broken, the connecting rod bearing bush is badly worn or burned, which will increase the gap between the connecting rod bearing bush and the connecting rod pin. When the diesel engine is working, a large impact load is generated between the connecting rod pin and the bearing bush, and an abnormal knocking sound is emitted. The knocking sound of the connecting rod bearing is similar to that of the main bearing, but it is lighter than that of the main bearing, and the tone is clear and a "bong" sound is emitted. When the diesel engine raises the speed or increases the load, the sound is more obvious, but it is not obvious when there is no load. c. The knocking sound of piston pin When the clearance between the piston pin and the connecting rod small head bushing is too large or the piston pin and the pin seat are too loose, there will be an impact effect and abnormal impact sound. It is a very sharp, high-pitched and obvious metal knocking sound. When the speed of the diesel engine changes, especially from a high speed sudden drop to a low speed, a sharp "bong" metal impact sound can be heard from the upper position of the cylinder. When the speed is low, the sound is slow and obvious. When the speed is raised, the sound will also increase. When the temperature of the diesel engine rises, the sound will not weaken. d. Piston ring knocking Because the piston ring is broken; the gap between the piston ring and the ring groove is too large; or because the cylinder liner wears, the convex shoulder appears on the top of cylinder sleeve, which causes the first piston ring to collide with the cylinder sleeve shoulder. If the piston ring breaks, it will make a "Shua shua" sound; if the gap between the piston ring and the ring groove is too large, it will give out a dull hammering sound, and as the rotation speed increases, the sound will also increase, and will become a noisy sound; e. The impact sound between valve and piston Because the valve clearance is not adjusted correctly, the valve is stuck in the open position; or the piston connecting rod group is not installed correctly, causing the valve to collide with the top surface of the piston, emitting a heavy and uniform, rhythmic knocking sound. The diesel engine is running with load for a period of time, and the sound is louder after the temperature rises. If the valve collides with the piston, the valve clearance should be re-adjusted and the installation position of the piston connecting rod group should be checked. f. Valve knock Because the valve clearance is too large; the clearance between the valve rod and the valve guide is too large; the valve is stuck; the cam wear is severe. When the diesel engine is running at a low speed, it is easier to hear continuous, rhythmic, and slightly "Tap-tap" sound. As the speed increases, so does the sound. If the valve knocking sound is found, the valve clearance should be checked and adjusted in time. g. The knocking sound of the valve spring The knock is caused by the valve spring being too soft or broken. In severe cases, the valve falls and collides with the top of the piston to make a loud noise. At the same time, a large amount of black smoke is generated in the intake pipe and the exhaust pipe, causing a destructive accident of the piston and the cylinder head. If the knocking sound of the valve spring breaking is found, the qualified spring should be replaced immediately. Starlight Power has focused on high quality diesel generator for more than 43 years, power range is from 20kw to 3000kw, if you have purchase plan recently, welcome to contact us by email [email protected]. |
作者
dieselgenerator 存档
July 2022
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