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The heavy-duty engine link of China National Heavy Duty Truck Co., Ltd. has experienced a "batch fracture problem," which is a recent report by a media in the south, entitled "Study on batch failure of China National Heavy Duty Truck Engines." The survey pointed out that the trucks of China National Heavy Duty Truck recently suffered a mass accident - "The big roots of the engine's connecting rods broke, resulting in the destruction of the engine's main body, crankshaft and other important components." On July 20 after the incident, China National Heavy Duty Truck convened on this matter. The press conference stated that the incident was a "process change" rather than a "bulk failure," and it accused the related report of "seriously misrepresented." On the same day, some domestic investment research institutions such as CITIC Securities, Everbright Securities, and Shenyin Wanguo, etc., commented that "small faults do not affect major developments," and they still remain high on G.Zhongqi (SZ 000951). However, the reporter noticed that various clarified news reports and investment analysis were based on China National Heavy Duty Truck, and people did not hear the authority of the national quality inspection agency. How much is the hidden danger? The automobile engine connecting rod refers to the connecting part between the piston and the crankshaft in the automobile engine. During high-speed operation of the engine, once the connecting rod breaks, it may crush the entire engine and cause the vehicle to lose power while traveling. This situation is most feared to occur during the downhill process of the vehicle. According to the driver's words, if the connecting rod breaks downhill, the consequences are "inconceivable."
Fortunately, the trucks of Sinotruk have not yet appeared "unthinkable" consequences, but this matter has now become the focus of heavy truck industry. Talking about the problem of connecting rod breakage in the engine, Cai Dong, General Manager of CNHTC Group, explained at the press conference that last year Sinotruk hosted the Hangzhou Automobile Engine Plant (referred to as Hangfa) to Weichai Power Co., Ltd. ( Chai). Before that, Hangfa had been using the "tapping" process in the engine connecting rod process, while Weichai adopted the "squeeze" process. Since Weichai hoped that the process would be unified, Hangfa also changed to the "squeeze" process. . Cai Dong said that after CNHTC's production in Jinan, China National Heavy Duty Truck started process docking from March 29 to April 2 this year. During the process conversion process in the past few days, we found a certain percentage of connecting rods. problem. Afterwards, the company promptly took measures to change back to the “tapping†process that the original Steyr engines had been using. As "squeeze" is the technology of Weichai, China National Heavy Duty Trucks cannot handle it proficiently and it seems to be excusable. However, when reporters consulted professionals in this regard, they got less optimistic conclusions. According to experts, it is almost impossible to find problems with the connecting rods only within a few days of the “process changeâ€; only after assembly to the vehicle and driving for thousands of kilometers, the link fracture phenomenon may become prominent. In addition, according to Cai Dong, the problematic connecting rod was only produced for 5 days. But the question is, why do some of the vehicles with broken connecting rods have a factory date before March 29? In the same incident, the engine's date of delivery is more than half a month after April 2nd. If still according to Cai Dong, "In the follow-up experiments found that the new process is not perfect," then why does China National Heavy Duty Truck still assemble these links to the vehicle? Even if only 5 days were produced, how many links with quality problems were produced between 5 days? How many are assembled to the vehicle? China National Heavy Duty Truck has not released data. It is understood that after CNHTC's suspension of Weichai engines, they have been using engines from either Hangfa or CNHTC Jinan Power Co., Ltd. (which entered after 2006), but when did they start? Abandoning the “squeeze†process and returning to a “tapping†process, it is difficult for reporters to be accurately informed. In addition to Cai Dong’s statement “March 29 to April 2â€, there are claims that it was at the end of May this year, and some people even said that it was June 25 this year.
According to data released by China National Heavy Duty Truck Group, 31,303 vehicles of various types were sold and sold in the first half of this year. The number of vehicles in the end of the year has hidden dangers. The reporter has no way of knowing. However, one thing is almost certain: due to the quality problems of the connecting rods, Sinotruk's car sales have started to decline. Do not take it lightly Cai Dong said that as of this year (July 20), there were 31 breaks in the connecting rod. Each engine has six connecting rods. In the first half of this year, it produced a total of more than 30,000 engines, with nearly 200,000 connecting rods. The percentage of fractures is very low, only one in seven thousandth. Liu Wei, director of China National Heavy Duty Truck Technology Center, also explained that "in the mechanical production process, there are quality defects that are difficult to avoid." Some analysts even said, "Small faults do not affect the development." However, the reporter saw the following statement on the internal quality standard of China National Heavy Duty Truck “QZZ11082-93JT†(Steady-Steyr WD615 series (quoting; picture) diesel engine technical conditionsâ€): The warranty period of the connecting rod must not be low In the car warranty period. Does this mean that the engine should not easily break the connecting rod? It is understood that the engine connecting rod break is a serious taboo in the industry. Therefore, Liu Wei's "unavoidable" argument is hardly the same as that of the industry. In the industry's view, there are six connecting rods in the engine, any one
Root fractures can crush the entire engine, while engines are scrapped, and the consequences are unimaginable, especially for high-speed trucks. A user in Henan told the reporter that the trucks of China National Heavy Duty Truck recently suffered a series of accidental breakages of connecting rods, causing them to worry very much. They think that for drivers who often run long distances and run on mountain roads, this is just like “no†Timing bomb." Cai Dong gives an algorithm, and marketers also have their own algorithms. According to market participants, 31 of the 200,000 connecting rods were broken, and the accident rate was only 1 in 3,000. However, for 30,000 vehicles, 31 vehicles had problems and the accident rate would be as high as 1 in 1,000. Therefore, they reminded that China National Heavy Duty Truck must attach great importance to the issue. "Any attempt to disguise an understatement will be misunderstood as a company's disdain."
Where do things go? Now that things have developed so far, where can China Heavy Duty Truck go? Some industry insiders suggested that since it is clear which links have quality problems, CNHTC should recall vehicles to handle hidden dangers. It should even actively request an authoritative quality inspection agency to supervise the implementation and openly face the public through the media. But now, China National Heavy Duty Truck still leaves many mysteries to the outside world. In addition to some of the above problems, is the breakdown of engine connecting rods a common problem in the heavy truck industry, or is it accidental in the special period of China Heavy Duty Truck? "Why is the ratio of connecting rods broken very low" based on who is the reference? "Tapping" process and "squeeze" process in the end is better or worse? This is what users are very concerned about. China National Heavy Duty Truck Co., Ltd. needs to explain it. This is crucial to the long-term development of the company. Recently, Futian Auman has launched a new commitment: “If our engine has a broken connecting rod, we will replace the new car for free and give a compensation of 10,000 yuan.†As the direct challenge of the industry's opponents, as the Chinese brand Is it also necessary to have such confidence? It depends on the comprehensive heritage of a company.
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