Below, let's take a look at the car knowledge that diesel car owners need to know.
The biggest headache for diesel engine owners: serious carbon deposition in the engine, poor throttle with big feet, high fuel consumption, short oil life, high maintenance cost and egr need to be blocked! In fact, what I want to say is: building a car.
The cause of the problem has a lot to do with the poor diesel products in China, but most of us ignore another main reason of carbon deposition in the engine of our car, that is, we are not correct.
Master the driving essentials of diesel engine.
Let's briefly talk about the characteristics of diesel engines: in fact, diesel engines are very interesting. Although the ideal air-fuel ratio of diesel engine is "air: fuel = 14.9: 1", it is impossible to maintain the actual diesel engine.
Under this air-fuel ratio, the actual air-fuel ratio of diesel engine varies between "16~300". Moreover, the air-fuel ratio of low load condition is much higher than that of high load condition.
When there is enough oxygen in the air and little fuel, the fuel is "fully burned", and the diesel engine saves fuel and has plenty of low-speed torque. So when we suddenly received the order: go in at once
During the 100-meter sprint, the body suddenly needs more oxygen to help break down energy, but the oxygen supply has not changed. Students with strong hearts and healthy bodies will soon "urgently breathe without oxygen" in their bodies.
Suction "to extract the energy source to complete the 100 meter sprint task, but the result is" anaerobic incomplete combustion produces a large amount of lactic acid accumulated in the body ",which is the reason for our limb pain after strenuous exercise.
For diesel engines, the diffusion speed of combustion is relatively slow due to compression ignition diffusion combustion. Under the condition of constant gas supply, a large amount of fuel is suddenly injected, which will lead to an oxygen-deficient area in the combustion chamber.
Domain, easy to produce incomplete combustion soot (equivalent to lactic acid in our body), naturally, these soot will waste fuel! At the same time, it will cause carbon deposition and pollute the lubricating oil. How to avoid this "sudden anoxic combustion"
Combustion is the key to avoid carbon deposition in diesel engines!
In the process of long-term diving, I found that many friends who complained about many problems with diesel engines often "drive diesel cars in the way and habit of driving gasoline cars". We need to understand that gasoline engines
Different from diesel engine, gasoline engine is "ignition combustion", and the supply of air and fuel is adjusted according to needs to keep it near the ideal air-fuel ratio 14.7: 1. So the gasoline engine "slammed on the gas pedal =
"Speed up immediately, quick response! However, the diesel engine is compression ignition, and the air-fuel ratio cannot be adjusted. Only by "stopping and gradually supplying a small amount of fuel" can the engine speed be gradually increased, and the power can be improved.
"Stepping on the floor oil" is harmful to the diesel engine, "causing the engine to suddenly lack oxygen, resulting in a decrease in combustion temperature, an increase in black smoke and a decrease in power".
Although high-pressure rail and electromagnetic injection can alleviate the negative effects of "sudden oxygen-deficient combustion" to a great extent. But long-term wrong driving habits will lead to this "sudden hypoxia burning day"
Constant occurrence ",will form a great burden on the nozzle and engine, and the nozzle will also be blocked by carbon deposition due to low combustion temperature." Unless it is overloaded or "cross-country obstacle clearing and dredging"
In addition to the overload condition, the engine is basically in the "medium and low load condition which is easy to produce carbon deposit", especially the diesel h6, so it can't run in the wild. Therefore, the egr open state of h6 is compared.
More, more can't "throw floor oil".
Speaking of which, can you understand? In fact, apart from oil products, the main reason why we generally complain about "engine carbon deposition" is that we use the throttle of gasoline vehicles to control our habits.
The wrong driving habit of "driving a diesel car" and "driving a diesel car with a large pedal or a lot of floor oil" leads to "sudden decrease of air-fuel ratio in the engine due to sudden injection of a large amount of fuel >: > > induced incomplete combustion.
burn >； > > black smoke > > the vicious circle of carbon deposition.
The throttle skills for correctly driving diesel vehicles are as follows:
1, in order to save face, try to avoid or even put an end to "one foot with a big accelerator and one foot with floor oil".
2. Use the correct gear according to the vehicle speed, and change gears frequently! Keep the engine speed around "ideal rpm 1300~ 1800rpm". Avoid engine speed being too low or rising sharply. Because of firewood
Oil engine is diffusion combustion, and the combustion speed should not be too fast. Excessive revolutions will only increase fuel consumption and carbon deposition.
3. Accelerate if necessary, and downshift appropriately >> First lightly step on the accelerator by about 30% > > Release it > > Then step on it by 40%>；; & gt Loosen it again >> Step on it for about 60% more >> Loosen it again, so you can pass the "light step-oil loosening-light" for about three times.
Step on the refueling cycle to increase the engine rpm.
4. When you feel that the power is enough, "upshift"-lightly step on the throttle of 50% to keep the number of revolutions, and keep the throttle cruising appropriately according to the acceleration state of the car.
The torque of Lv Jing is 3 10nm, which is equivalent to the torque output of a 3.5l naturally aspirated gasoline engine. If you can master the throttle skills correctly, driving will be very enjoyable.
. Mastering this driving skill can avoid unnecessary fuel waste and engine carbon deposition as much as possible. Even if egr is not blocked, the maintenance cost of the engine will be very low. Remember the formula: Stop Bigfoot Oil!
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