What are the disadvantages of diesel vehicles?

1. The disadvantages of diesel vehicles are as follows: 1. Diesel cars are noisy and vibrate, which affects driving comfort, so passenger cars are relatively seldom used. However, with the continuous progress of technology, some middle and high-grade diesel vehicles are quite close to gasoline engines, and many major automobile manufacturers at home and abroad have also introduced many diesel vehicles and SUVs. 2. High manufacturing cost, high requirements for fuel quality and heavy weight: the fuel injection device of diesel engine is extremely precise and difficult to manufacture. If inferior fuel is used, the life of the fuel injection device will be seriously shortened. Because of the high compression ratio and structural strength of diesel engine, its weight and volume will be relatively large. 3. Cold start in winter is not as good as gasoline engine: due to the volatility and compression ignition of diesel, cold start in winter is not as good as gasoline engine. Even if there is a startup preheating device, it will take tens of seconds to start. Second, the advantages of diesel vehicles are as follows: 1, long service life, economy and durability: the diesel engine has low speed, the related parts are not easy to age, and its service life is relatively longer than that of gasoline engines, so the failure rate of diesel engines is much lower than that of gasoline engines. Some imported diesel engines can reach 800- 1 10,000 kilometers without overhaul, while gasoline engines only have 400,000-500,000 kilometers. The fuel consumption of electronically controlled turbocharged diesel engine is 2.8 liters, which is equivalent to the fuel consumption of electronically controlled gasoline engine 1.6 liters. 2. Low speed and large torque: Diesel engines usually get high torque at a small speed, which is more important than gasoline engines in the case of complex roads, climbing and loading. However, the performance of accelerating and high-speed driving on the expressway is not as good as that of gasoline vehicles. 3. High safety: compared with gasoline, it is not easy to ignite or explode due to unexpected circumstances, so using diesel is more stable and safer than using gasoline. 4. More environmental protection: the greenhouse effect produced by diesel engine is 45% lower than that of gasoline, and the emissions of carbon monoxide and hydrocarbons are also lower, but during the service life of the whole vehicle, the emissions of nitrogen oxides and PM (particulate matter) are higher than that of gasoline engine.