Diesel cars are not easy to start in winter, because the temperature is relatively low in winter, and various factors are easy to cause poor starting. Here are the reasons why the diesel car I carefully sorted out for you doesn't work well. Let's have a look.
1. Carbon deposition
Engine carbon deposition is an old problem. It is almost impossible to completely solve it. A large amount of carbon deposition is the main reason for poor starting. Specifically, throttle carbon deposition affects throttle response and idle speed, fuel injection nozzle carbon deposition affects fuel injection quantity, inlet carbon deposition affects mixture concentration, spark plug carbon deposition affects ignition, etc.
2. Battery
There is no need to talk about the problem of the battery. Battery power loss, poor contact at the terminal, battery management system problems, etc. will have a certain impact on the car.
3. ambient temperature
The low temperature has a great impact on the whole car, not only on engine oil and gasoline, but also on the starting power of the battery due to low temperature.
4. Starter
The aging starter will also lead to poor starting, which should be distinguished from non starting. In general, after the starter has been used for a long time, there will be weak starting. The solution is to replace the starter.
5. ignition system
Because the components of the ignition system do have a great impact on the start-up. I think too large spark plug gap, low ignition voltage caused by ignition coil failure and some circuit problems will have an impact on the car.
6. Low pressure oil circuit
Insufficient starting oil pressure is one of the reasons why the car is difficult to start. There are many reasons for insufficient oil pressure, which are generally caused by fuel pressure regulator, fuel pump or internal pipeline. The specific reasons must be checked in the repair shop.
First, check whether the diesel engine has a burst sound when starting and whether there is smoke from the exhaust pipe. If there is neither sound nor smoke, it means that there is no diesel entering the cylinder at all. It is necessary to find out the reason from the aspect of diesel transmission.
Second, you can hear the occasional explosion sound and smoke from the exhaust pipe. No matter how much, it means that the fuel has entered the cylinder, but the normal combustion process can not be completed. In this case, the reasons need to be found from the aspects of fuel supply timing, fuel injection atomization quality and temperature and pressure at the end of compression.
Third, remove the oil pipe on the high-pressure pump, try to pump oil with the hand pump and observe the oil outlet valve. If there is oil overflow, it indicates that the oil outlet valve is faulty. Under normal circumstances, the governor can also be adjusted to the maximum oil supply position, and the plunger can be pried with a screwdriver to see whether there are bubbles in the oil, or the fuel injection nozzle can be directly installed to check the atomization. An experienced master touches down the high-pressure oil pipe when starting. If there is pulsation but it cannot be started, the reason is the fuel injection nozzle. If there is no pulsation, the reason is the high-pressure pump.
The torque advantage in the low speed area is better than that of the gasoline engine, that is, the acceleration performance is better. Moreover, the engine of our Lingzhi diesel car is still turbocharged with T. Another big reason is to save fuel. Let's say, diesel cars with the same displacement can save one third than gasoline cars. In today's era of high fuel consumption and high prices, saving fuel is saving money.
However, a friend told me why when driving a diesel car, he just thought it was more fuel-efficient than a gasoline car, but it didn't save much. Here are some experiences:
First, pay attention to the hot car. First, idle for a while and wait until the car is hot.
Second, it is very important to step on the accelerator gently and brake less when running, so as to keep driving at a constant speed.
Another point is that it is not fuel-efficient for diesel vehicles to shift to high-grade at low speed. It is best to use low-grade and high-grade fuel.
Another thing is maintenance. Pay attention to the maintenance of the engine and often check the tires. If the tire pressure is insufficient, the service life of the tires will be reduced and the fuel consumption of the car will increase.
Guess you're interested:
1. Troubleshooting of excavator weakness
2. Reasons for excessive exhaust gas pressure in diesel engine crankcase
3. What are the skills and secrets of starting without stalling
4. What are the reasons for the non circulation of high temperature water in diesel vehicles and what should be done
5. What is the reason why the high-pressure oil pump of diesel vehicle does not inject fuel? What should be done
6. What is the reason why the diesel car is powerless