In the hot summer, due to high temperature, heavy rainfall, large dust and strong radiant heat, the car, especially the engine, is very easy to change due to high temperature, resulting in engine failure, which seriously affects the transportation work of the card friend.
As a well-known engine company in the industry, FAW Jiefang Engine Division (hereinafter referred to as the Business Department) adheres to the principle of careful research and development, patience and user confidence, and always strives to create advanced, safe and reliable engine products for users. In the hot summer, what guarantees the high temperature resistance of the Xichai engine, so that the transportation work of the card friend is so smooth?
Strict selection of key components to ensure the quality of tin diesel core in high temperature environment
"Material-Determining Strength" The engine structure is complex, involving many parts, and it is important to determine the high-temperature resistance of the components, non-cylinder cover, piston and exhaust pipe. As the national emission standards became more and more stringent, the R&D team of the business department repeatedly analyzed and confirmed that the cylinder head material was replaced by the original gray iron into vermicular cast iron. The compacted graphite cast iron has high adaptability and can withstand the ultra-high temperature of 380 °C. It is very suitable for heavy-duty machines with large burst pressure in the cylinder. At present, the cylinder head of the Austar L-type engine of the national six-stage has been fully used. Cast iron material. At the same time, the use of ferrosilicon combined with high temperature resistance characteristics, the business unit has carried out a new upgrade of the exhaust pipe material, the use of medium silicon wrought iron material, up to 700 ° C high temperature.
FAW Jiefang Division develops Xichai engine
In addition, at this stage, the engine products are developing towards the trend of high horsepower and light weight. The increase of the combustion gas expansion force in the cylinder has higher requirements on the wear resistance and flexibility of the piston, so the R&D personnel of the business unit will Actively investing in research and development, the use of steel pistons, replacing the original aluminum pistons, strictly guarantees the reliability of the reciprocating motion of the piston components of the engine parts of the business unit under high temperature and high pressure.
During the working process of the engine, high temperature, high pressure and high vibration are the normal state of operation, which requires the engine to pay attention to the reliability of the quality between each component in the production process, and strictly control the precise operation between the various components. In addition, the person in charge of R&D of the business department emphasized: “The R&D work must not only be precise, but also keep up with the general trend and continuously upgrade and rebuild the overall performance and components.â€
The simulated working condition experiment is where the firewood of Xichai is not afraid of high temperature.
In order to ensure the durability and reliability of the engine products of the division, the most demanding tests will be carried out before the mass production of each engine. The test engine is required to pass the first generation test of 2000 hours of overload cycle performance test, the second generation test of 3000 hours of simulated complex road mixed cycle and the third generation test of thermal shock of nearly 10,000 times of simulated acceleration and deceleration. After three generations of development and testing, it took more than 20,000 hours, and the engine is equivalent to actually driving 3.5 million kilometers...
FAW Jiefang Division develops test personnel to inspect Xichai engine
In addition, in order to ensure the stability of the engine under the hot and high temperature conditions of the card friends, the development and test personnel of the business department have carried out the three high tests of "high intake air temperature, high water temperature and high oil temperature". In the summer, during the actual driving process, the engine's intake air temperature is up to 40 °C, the water temperature is up to 75 °C - 85 °C, and the oil temperature is generally about 8 °C higher than the water temperature. However, in order for the engine to be universally applicable to the actual driving conditions of various users, the development tester takes into account the extreme operating conditions and allows the engine to be exposed to the inlet temperature of 45 ° C for a long time, constant 95 ° C by simulating the extreme limit environment. The water temperature and the oil temperature of 103 ° C, the continuous durability and high temperature test for up to 3000 hours to ensure the reliability and durability of the engine under high temperature conditions.
Not only that, but the development and test personnel of the business department will also carry out multiple tests such as thermal shock test, rated power operation test and heavy load and light load power test in super acceleration and deceleration within 3 minutes to comprehensively test the performance of the engine.
Strict and realistic test is the performance of Xicai's conquering high temperature
"There is no problem that can't be overcome." In the test work of the National Sixth, the business department constantly inspires everyone's fighting spirit and ignites the enthusiasm of everyone. All engine products undergo a test of simulated conditions and are subject to vehicle performance testing in harsh environments.
After the extreme cold test in Huadian, Jilin, and the plateau calibration test in Qinghai Golmud last year, in order to obtain more comprehensive live test data, the vehicle testing team of the business unit will be known as the “Chinese stove†at the end of June this year. In Turpan, Xinjiang, the high-temperature verification of the national six engines, such as the 4DB1 4DLD 6DLD 6DM2 6SL equipped with the whole vehicle, was carried out. The vehicle testing team of the business unit selected the high temperature test in the Turpan area with an ambient temperature of 45 ° C and high heat. In the worst high-temperature working environment, it is planned to carry out test work such as continuous high-speed driving, long-term climbing and high-temperature exposure in full-load driving for the assembled vehicle. For the engine part, the tester will also complete the test work of start-up, booster thermal protection, exhaust temperature thermal protection and engine intake air temperature control to verify the reliability and adaptability of the whole vehicle and engine in high temperature environment. Sex.
So, how to maintain the summer heat to better protect the engine?
1, regular oil change: long-term non-replacement of oil is easy to produce harmful sludge, in serious cases will cause oil passage blockage, if not cleaned in a timely manner will seriously affect the service life.
2, regular inspection and cleaning of the water tank: the water tank is an important part of the engine cooling, easy to scale and rust in summer.
3. Regularly check the important parts of the engine: the valve clearance of the engine, the valve timing, and the injection pressure should be checked and adjusted regularly to ensure that the engine is in good condition.
A core of the world, the mission is even more glorious! In the next few months, the National Six Engines, which have undergone multiple “honedingâ€, will gradually assemble various models and gradually approach the card friends to help the card friends create a better life. The business department will continue to work forward and bravely to create a safe and reliable national "core dirty" as its mission, and help the vigorous development of China's power industry!
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