This has attracted the enthusiasm of major international companies for diesel engines and greatly promoted the sales of diesel vehicles abroad. At present, diesel vehicles in Europe have accounted for half of gasoline vehicles, and some models such as Land Rover are diesel versions in Europe. The advantages of diesel vehicles are so outstanding that our government began to support this project. In this context, the long-standing oil problem has also been solved. From June 65438+1 October1last year, Beijing began to provide diesel oil that meets the "national four" standards. According to the new policy issued by the State Council in May this year, by 20 10, all vehicle diesel will meet the national third standard. Obviously, the pace of diesel vehicles entering the domestic market is getting faster and faster.
Judging from the actions of manufacturers, diesel vehicles have become the next target market for many manufacturers. Generally speaking, the average fuel consumption per kilometer of diesel vehicles is about 25% less than that of gasoline vehicles, and diesel itself is relatively cheap, so diesel vehicles can save a lot of money.
But most consumers buy gasoline cars, so few people know about the maintenance of diesel cars. If you plan to buy a diesel car, the potential owner must follow the following points:
Note 1: Diesel oil is a complex mixture of hydrocarbons, which is difficult to ignite, so it is a relatively safe choice as a fuel. Diesel quality is the guarantee of "healthy" operation of diesel engine. Inferior diesel oil containing moisture or impurities will seriously damage the high pressure distribution pump. Therefore, for users, the best way is to carefully choose gas stations and ask for bills after refueling.
Never refuel a diesel car by mistake. If the staff at the gas station mistakenly add gasoline, the owner should not start the car, but should immediately contact the maintenance station or 4S shop for technical support.
Note 2: Diesel engines are durable, with relatively low rotational speed and relatively little wear of engine parts. In addition, the diesel engine has no high-pressure ignition system and throttle body, so the engine failure rate is low and its service life can reach about 850 thousand kilometers. However, the requirements of diesel engines for engine oil are different from those of gasoline, and special engine oil is needed. And its maintenance time is related to the engines produced by various manufacturers and local oil products. For example, Land Rover diesel engine, when the fuel sulfur content exceeds 0.7%, the oil change time cannot exceed 6,000 kilometers. Of course, if the diesel oil is lower than this value, the maintenance cycle can reach 12000 km.
In the process of use, we should also strengthen the maintenance of air filter, oil filter and diesel filter and give full play to their functions.
Note: Diesel engine has good power and saves fuel. Diesel engines with the same displacement have much higher power and lower fuel consumption than gasoline engines. However, the diesel engine must not refuel after consuming diesel oil, because in this case, the engine will be at idle speed and inhale air, which will seriously damage the engine.
Note: Most new diesel engines are equipped with glow plug device. This indicator light reminds the user that glow plug is heating. When the engine is cold, turn on the ignition switch, the light will turn on, the indicator light will turn off, and start the engine. If the engine is in a warm-up state, the light will not light up and the engine can be started directly. At the same time, the lamp also has an alarm function. The indicator light is on while driving, indicating that the engine management system is out of order.
Note: Don't step on the accelerator when starting a diesel car, don't start too fast, and don't spin too fast. When the engine is running at high speed for a long time, don't turn off the engine immediately. Keep idling for about 2 minutes, and turn it off after the temperature drops to avoid heat accumulation.
Note 6: Finally, understand a concept-condensation point. The temperature at which diesel oil loses fluidity and begins to solidify is called freezing point. If the freezing point is too high, the oil circuit will be blocked easily at low temperature. In China, the label of diesel oil is compiled according to the freezing point, which is the main basis for choosing diesel oil, so it is necessary to choose suitable diesel oil according to different regions and seasons. The following table shows the applicable zone temperatures corresponding to different diesel labels. 10 light diesel oil is suitable for diesel engines with preheating equipment.
No.5 light diesel oil is suitable for areas where the accident rate is 10% and the lowest temperature is above 8℃.
0 # light diesel oil is suitable for areas where the risk rate is 10% and the lowest temperature is above 4℃.
-10 light diesel oil is suitable for areas where the lowest temperature is above -5℃ and the accident rate is 10%.
-20 light diesel oil is suitable for areas where the lowest temperature is above-14℃ and the accident rate is 10%.
-35 light diesel oil is suitable for areas with the lowest temperature above -29℃, and the accident rate is 10%.
-50 light diesel oil is suitable for areas with the lowest temperature above -44℃, and the accident rate is 10%.
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