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汽车维修中残存的误区要知道

来源:http://www.sdjnltqf.com发布时间:2022-10-20 14:40:42

虽然如今汽车维修工艺也在不断更新。但是,人们的认识滞后于科学技术的发展,汽车维修中残存的误区还有很大影响,济南大众汽车维修哪里有厂家认为其表现主要有以下几种:
Although the car maintenance process is also constantly updated. However, people's understanding lags behind the development of science and technology, and the remaining misunderstandings in automobile maintenance still have a great impact. Where do Jinan Volkswagen's maintenance manufacturers think that their performance mainly includes the following:
a.滑动轴承的轴瓦须刮削。认为发动机的曲轴轴承,连杆轴承换新时轴瓦须刮削,不削轴承不能保证有良好的接触面,甚至把刮削轴瓦当成汽车修理中的良好技术。而现代汽车,尤其是小型发动机,其曲轴轴承和连杆轴承上轴瓦的耐磨合金涂层很薄,不允许刮削,只能按相应的尺寸选配。如没有合适尺寸的曲轴承,则必要时可用基孔制的方法磨削曲轴,以求得合适的配合间隙。
a. The bearing bush of the sliding bearing must be scraped. It is considered that when the crankshaft bearing and connecting rod bearing of the engine are replaced, the bearing bush must be scraped, and the good contact surface cannot be guaranteed without cutting the bearing bush. Even scraping the bearing bush is regarded as a good technology in automobile repair. For modern cars, especially small engines, the wear-resistant alloy coating on the bearing shells of crankshaft bearings and connecting rod bearings is very thin, and scraping is not allowed. They can only be selected according to the corresponding size. If there is no suitable size of the crankshaft bearing, the crankshaft can be ground with the basic hole method when necessary to obtain a suitable fit clearance.
b.发动机水温怕高不怕低。水温高千方百计查找原因,而水温低则认为是正常的。其实现代汽车发动机水温偏低危害很大,会使混合气燃烧不充分,功率降低,油耗增加,并造成润滑不良,还会引起排放超标。
b. The engine water temperature should not be too high or too low. If the water temperature is high, do everything possible to find the cause, while if the water temperature is low, it is considered normal. In fact, the low water temperature of modern automobile engines is very harmful, which will lead to insufficient combustion of the mixture, lower power, increased fuel consumption, poor lubrication, and excessive emissions.

济南大众汽车维修哪里有
c.气门间隙大点比小点有劲。其实气门间隙大,气门升程小、开度不够,使进气量不足或排气不畅,恰恰降低了发动机功率。
c. The valve clearance is stronger when it is larger than when it is smaller. In fact, the valve clearance is large, the valve lift is small, and the opening is not enough, which causes insufficient air intake or poor exhaust, just reducing the engine power.
d.加机油愈多愈好。认为发动机加机油宁多勿少,加少了容易烧轴承,加多点关系不大。其实机油加多了对发动机照样造成危害,斜置式发动机和V型发动机尤甚。它即增加曲轴、连杆的转动阻力,又使其飞溅到缸壁上的机油增多,造成燃烧室积炭增加。所以机油加多了,会降低发动机功率,增加磨损,也会引起排放超标。
d. The more oil you add, the better. It is believed that more engine oil is better than less, and less engine oil will easily burn the bearing, so more engine oil does not matter much. In fact, too much oil will do harm to the engine, especially the inclined engine and V-type engine. It not only increases the rotation resistance of the crankshaft and connecting rod, but also increases the amount of oil splashed on the cylinder wall, resulting in increased carbon deposition in the combustion chamber. Therefore, if the engine oil is added too much, the engine power will be reduced, the wear will be increased, and the emissions will also exceed the standard.
e.空毂润滑不可靠。认为轮毂内塞满润滑脂,可保证轮毂轴承的润滑,只在轴承上涂覆润脂的空毂润滑不保险,须把轮毂中间的空隙装满润滑脂。其实这样做不但浪费润滑脂,而且影响轴承散热,对轴承的润滑有害而无利。
e. Loose hub lubrication is not reliable. It is considered that the hub is filled with grease to ensure the lubrication of the hub bearing. It is not safe to lubricate the empty hub that is only coated with grease on the bearing. The gap between the hubs must be filled with grease. In fact, this not only wastes grease, but also affects bearing heat dissipation, which is harmful to bearing lubrication.
此外随着制造水平的提高,现代的汽车零部件寿命已大大延长,随意拆检势必破坏已经磨合好的配合状态,使零件的使用寿命大大地缩短,所以说如果没有发现部件或总成具有明显的故障时一般不要拆检。关注我们http://www.sdjnltqf.com带您了解更多汽车维修内容!
In addition, with the improvement of manufacturing level, the service life of modern automobile parts has been greatly extended, and random disassembly and inspection will inevitably destroy the running in matching state, which will greatly shorten the service life of parts. Therefore, if no obvious fault is found in components or assemblies, generally do not disassemble and inspect them. Follow us http://www.sdjnltqf.com Learn more about car maintenance!