4HK2 piston ISUZU excavator engine parts
Product Description
The automobile piston is like the central part of the automobile engine, which occupies an extremely important position when the engine is started. The automobile piston is used to bear the gas pressure and make the connecting rod drive the crankshaft to rotate through the piston pin. The top of the piston is also an integral part of the combustion chamber. The general automobile piston is divided into three categories: diesel engine piston, gasoline engine piston and general-purpose piston.
Detailed Photos
The piston crown is an integral part of the combustion chamber, so it is often made into different shapes. The piston crown of gasoline engine usually adopts flat or concave crown, so as to make the combustion chamber compact in structure, small in heat dissipation area and simple in manufacturing process. Crown piston is often used in two stroke gasoline engine. The piston crown of diesel engine is often made into various pits. The piston head is the part above the piston pin seat. The piston ring is installed on the piston head to prevent the high temperature and high pressure gas from entering the crankcase and the engine oil from entering the combustion chamber; Most of the heat absorbed by the top of the piston is also transferred to the cylinder through the piston head, and then through the cooling medium. The number of piston rings depends on the sealing requirements, which is related to the engine speed and cylinder pressure. The number of rings of high-speed engine is less than that of low-speed engine, and the number of rings of gasoline engine is less than that of diesel engine. General gasoline engine adopts two gas rings and one oil ring; The diesel engine has three gas rings and one oil ring; Low speed diesel engine adopts 3-4 gas rings. In order to reduce the friction loss, the height of the ring should be reduced as far as possible, and the number of rings should be reduced under the condition of ensuring the sealing. All parts below the piston ring groove are called piston skirt. Its function is to guide the piston to make reciprocating motion in the cylinder and bear the side pressure. When the engine is working, the piston will bend and deform because of the gas pressure in the cylinder. After the piston is heated, the expansion of the piston pin is greater than that of other parts because of the more metal at the piston pin. In addition, the piston will produce extrusion deformation under the action of side pressure. As a result of the above deformation, the cross section of the piston skirt turns into an ellipse of the long axis in the direction of the piston pin. In addition, due to the uneven distribution of temperature and mass along the axis of the piston, the thermal expansion of each section is large at the top and small at the bottom.
Packaging & Shipping
details1. Our packing uses export wooden cases, plastic boxes, cartons or pallets. All the package are very strong, the wooden box is firmly bound, the package is covered with a waterproof film to prevent water or damage during transportation.Before packing, we can also stick corresponding labels and shipping marks according to your needs. All our goods are well packed.
2. According to the quantity, we can use express delivery, air transportation or ocean transportation, automobile transportation, railway transportation, etc. we have our own freight forwarders, and we can also use the designated freight forwarders of customers, which can meet various delivery requirements of customers, such as EXW, FOB, CIF, etc.It can also be exported from many ports in China.
Such as Qingdao port, Ningbo port, Lianyungang port, Tianjin port, Suifenhe River and Alashankou in China.
3. We can also send the goods by express if the customers have less goods. According to customer's request, we can use express.such as DHL, TNT, EMS, FedEx, etc. the delivery time is 3-7. Safe, fast and convenient. It's also a good choice for you.
Jinan Carman International Trade Co., Ltd. is located in economically developed, beautiful and rich Jinan, Shandong Province, with convenient industrial environment, close to Qingdao and Yantai freight ports by sea and convenient and fast land. The company was founded in 2013. Through the unremitting efforts of all employees, the company has become today's high-tech enterprise integrating product design, non-ferrous metal casting, machining and high-pressure oil pump assembly product manufacturing. The company is located in Jinan high tech Industrial Park, covering an area of 5000 square meters, with international standardized plants and perfect and optimized production lines. It has all kinds of advanced casting, processing and testing equipment, gravity pouring machine, core shooting machine, cutting machine, grinding, polishing and other hot processing equipment, large CNC machining center, CNC lathe, high-precision grinder, modular machine tool and other cold processing equipment, precision direct reading spark spectrometer, Rockwell / Brinell hardness tester, tensile testing machine, high-pressure oil pump test bench and other high-precision testing equipment. The company pays attention to product technology research and development and intellectual property protection, has long-term cooperation with domestic key universities and scientific research institutions, and has a number of national patents for products. The company has advanced casting technology and abundant and perfect machining capacity. It has successively developed P9 series, ps7100 series, ps8500 series and ep9 series high-pressure oil pumps. It is focusing on the development of diesel engine electronic fuel injection system with world-class technology. Our oil pump products are of reliable quality, and the product market is all over the country and exported to overseas markets. Adhering to technology R & D and management innovation, the company has further established and improved the modern enterprise management mechanism after years of development and efforts, and obtained the ISO9001 international quality management system certification in 2020. "Valuing promises, keeping promises and taking customer satisfaction as the service purpose" is the belief of the enterprise. In line with the purpose of "quality for survival, sincerity for reputation, service for image, management for benefit and innovation for development", we continue to innovate, improve production technology and product quality, so as to become an enterprise that customers can rest assured. The chairman of the company and all the staff sincerely welcome new and old customers to visit and guide!
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