Last week, a netizen asked Xiao Bian a very anxious question. When I was refueling, I accidentally added gasoline fuel into a full box of diesel fuel. I also drove one kilometer away. Afterwards, what should I do if my car stalled?
First, why petrol vehicles can not add diesel
1, the difference between gasoline and diesel
Gasoline has a low carbon content, while diesel has a relatively high density and a large difference in density. It is equivalent to light and heavy water. Gasoline and diesel are the difference between light and heavy oil. Therefore, compared to gasoline, diesel fuel has a low ignition point and is not easily volatile, while gasoline has a flash point of 410° to 430° and is volatile.
Therefore, the diesel engine adopts a compression ignition method, which does not require a spark plug to ignite. By heating the compressed air to the ignition point of diesel fuel, it can be burned by itself. In the gasoline engine, after the gasoline injected by the injector and the air introduced by the throttle valve enter the cylinder, it is ignited by the spark plug at the end of the contraction stroke, and it also becomes an ignition type.
2. What are the consequences of adding wrong diesel oil?
On the one hand, the injector pressure of the gasoline engine is much smaller than that of the diesel engine. After the diesel is added to the gasoline, due to the insufficient pressure of the injector, the diesel can not be fully atomized and the combustion is not sufficient. The engine is felt to be powerless and the accelerator pedal is not used. It will also seriously increase carbon deposition and block fuel injectors.
On the other hand, the ignition point of diesel oil is low, and the ordinary gasoline engine is ignited by a spark plug. In this way, before the spark plug is ignited, the diesel itself begins to burn violently, causing abnormal pressure in the combustion chamber, which is commonly known as knocking.
Second, gasoline vehicles plus diesel should be how to do?
This can be divided into two situations:
Case 1: After adding the wrong oil (add a full case of diesel oil), remember not to ignite the car and avoid the diesel entering the oil circuit. Then drag the car to the 4S shop or repair shop, put the diesel clean, and then add gasoline.
If diesel is only added a little (not more than 5-10% of the tank's capacity), if it is discovered in time, it is actually not a big problem. Refilling the petrol will do nothing and will not have any impact.
Situation 2: Actually, most of the small partners who add the wrong oil will not be discovered in time, but they will find that the vehicle has been abnormal for a period of time (the most obvious phenomenon is severe vibration or poor acceleration), or it has been turned off. Only then realized.
This situation was immediately called rescue. In addition to the dry cleaning of diesel oil in the repair shop, it also needed to clean the oil circuit, replace the fuel filter, and conduct a thorough inspection.
In most cases, before the knocking is severe enough to destroy the engine, the engine has been turned off. Generally, the tragic situation shown below does not occur. If 4S shop or repair shop flickers you say you want to change the engine, you have to let him look at the engine.
Before that, foreign car programs have also been tested. Gasoline plus diesel, diesel and gasoline are added. Look at what will happen. Diesel vehicles will add gasoline. The consequences may be even more serious.
Although the wrong oil is not as horrible as it should be, it is still necessary to remind the younger partner to seriously determine the oil before refueling. Do not make this mistake.
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