Qichen t90 explains what an engine fault is.

Qichen t90 shows the cause of engine failure: 1, sensor failure; 2. Engine maintenance is not in place; 3, poor combustion of mixed gas; 4. Poor oil quality; 5. The air filter element is not clean.

1. If the engine oil is added too much, the instantaneous working resistance of the engine will increase, which will increase the rotating resistance of the crankshaft and reduce the output power of the engine;

2. Excessive engine oil will break into the combustion chamber to participate in combustion. In this way, the vehicle will burn engine oil and emit blue smoke, resulting in an increase in fuel consumption;

3. The oil model is wrong. For example, it used to be fully synthetic, but now it is changed to mineral oil. You must go to a regular store to change the genuine engine oil. Fake or inferior engine oil does great harm to the engine. According to the recommended engine oil model in the maintenance manual, there is basically no problem.

An Feng, certified expert, certified automobile master, years of working experience in the industry+asking him questions to explain that the problem can be found in various noises of the engine, and the radiated noise on the engine surface is the main one. . The radiated noise on the engine surface consists of combustion noise and mechanical noise, which are produced by combustion and mechanical vibration inside the engine. Combustion noise refers to the noise generated by the outward radiation of cylinder combustion pressure through piston, connecting rod, crankshaft and cylinder. Kong Chengtian, a certified expert, has many years of industry experience+there are many factors that can make the engine sound louder. First, determine whether there are other abnormal noises or the volume is just as loud as the normal working sound (it is best to test multiple speeds). If there are no other abnormal noises, there are several common possibilities. There are more carbon deposits in the engine, air intake and throttle. In addition, when the maintenance period approaches, engine noise will increase due to weak oil wear.

(Photo/Text/Photo: Ask and Answer Animals) @20 19