Why is it difficult to start diesel cars in winter?

Diesel cars are difficult to start in winter, and the main reasons for this are:

1) Due to the low gas temperature and fast heat dissipation in the near future, coupled with the low speed of the crankshaft, the temperature and pressure in the cylinder are too low at the end of the compression stroke, and the spontaneous combustion and ignition temperature of the fuel cannot be reached. Generally, the temperature in the cylinder after compression is required to reach more than 400, and the minimum temperature cannot be lower than 350.

2) The viscosity of the lubricating oil greatly increases at low temperatures, and even solidifies, so that the engine starting resistance increases, and it cannot reach the minimum speed required to start the engine (generally more than 100r min** minutes).

3) At low temperature, the terminal voltage of the battery decreases, the capacity decreases and the charge is insufficient, so that the starting motor cannot reach the starting speed when driving the crankshaft, or even cannot be carried at all.

What should I do if the diesel car is not good to start in winter? Teach you a trick.

In the north of the Yangtze River in China, diesel vehicles are not easy to start in winter because the temperature is low, the diesel is not easy to atomize in the machine, and the diesel ignition point is low, so it is not easy to start. You can park your car in a garage with relatively warm temperatures and make full use of the pre-heating device on the car to warm up before starting. Of course, the battery and starter must be reliable.

Diesel cars are difficult to start in winter, which is related to the technical state of the engine, the temperature and the fuel label. Of course. It is also related to whether the battery capacity is sufficient.

Landlord, how many diesel fuel do you have? I think the current temperature, -10 is considered the most basic!

What's there, just add some antifreeze.

Add oil and antifreeze.

What should I do if the diesel car is not good to start in winter? Teach you a trick.

1.Preheating should be carried out in the season when the temperature is low.

When the diesel initiator starts cold, the main reason affecting the starting performance is that it cannot reach the compression ignition temperature of the diesel fuel. In this regard, the hot water can be preheated by the cooling system of the initiator, which is an effective way to improve the starting performance.

The detailed method is to continue to heat the water (let the water flow out of the cylinder) and gradually increase the water temperature to preheat. When the temperature of the outgoing water is high, close the water discharge switch.

In addition, the oil pan can be heated with an open flame such as a blowtorch to improve the activity of the oil and increase the stationary resistance of the parts.

2.Improve the sealing performance of cylinders.

One of the differences between diesel engines and gasoline engines is the compression-ignition type, so the cylinders are required to have high sealing performance. In the summer, when the engine is started cold, because there is little oil on the piston ring and cylinder wall, the sealing effect is not good, and the scene of repeated start and cannot catch fire will appear. Sometimes the sealing performance of the cylinder is significantly affected by heavy cylinder wear, making it more difficult to start.

In this regard, the injector can be removed, and 30 40ml of oil can be added to each cylinder to strengthen the sealing performance of the cylinder and improve the pressure of the car during maintenance and contraction.

3.Eliminate air from the oil circuit.

Unscrew the air release screw on the high-pressure oil pump, and pump the oil by hand to drain the air in the high-pressure oil circuit; Then, the air in the high-pressure oil circuit is discharged. The detailed method is: loosen the oil pipe joints on each injector, so that the throttle is in the maximum oil supply position, and rotate the crankshaft until the oil pipe joints of each cylinder injector are in a hurry.

Due to the cold weather, fast heat dissipation, and low crankshaft speed, the natural ignition temperature of the fuel cannot be hit. At low temperatures, the battery voltage decreases, the capacity decreases and the charging is insufficient, and the starting speed cannot be reached when the crankshaft is driven by the starting appliance, or even cannot be driven at all.

The reason is mainly due to the low temperature in winter, fast heat dissipation, increased oil viscosity, and low crankshaft speed, resulting in too low temperature and pressure in the cylinder when the piston is compressed, and the spontaneous ignition temperature of diesel cannot be reached. Generally, the temperature in the cylinder after compression is required to reach more than 400 degrees after compression.

Diesel fuel can wax. The temperature is too low and the diesel waxes up, the delivery pipeline is blocked, and the engine can't get the diesel**, so it can't start.

1.It is possible to add an intake air heating device at the air intake.

2.The fuel tank can be retrofitted with a device for preheating diesel.

3.Give the engine a bath with boiling water before starting.

4.Add antifreeze oil!

In winter, diesel is generally added with negative No. 35 diesel. When the temperature of diesel is low, it will form wax, and if the temperature is continued to be lowered, it will solidify, and minus 35 diesel can be used at a low temperature of minus 35 degrees, so it is easier for zero diesel to make the car not catch fire. In winter, remember to keep your car warm, park in the indoor parking lot as much as possible, remember to keep warm manually if you don't have the conditions, and put a quilt on the hood of your car.

Have a great day! Happiness and well-being!

According to what you said, diesel cars are not easy to start in winter, and the main reasons are as follows: 1Oil circuit problems (diesel fuel is not available).

2.High-pressure oil pump problem (you can go to calibrate the pump) 3There is something wrong with the grease nozzle.

4.Whether the glow plug works well.

You can open the throttle first to heat the body for three to five minutes, and this is the case in winter, and the diesel freeze point is low. I hope to click on the good reviews.

Diesel cars often have a bad start in winter. The temperature in winter is very low, but the heat dissipation is fast, resulting in the temperature and pressure in the cylinder at the end of the compression stroke are too low, and the temperature of diesel spontaneous combustion cannot be reached.

What should I do if the diesel car is not good to start in winter? 1.The fuel tank can be equipped with a preheating diesel state;

2.It is possible to add an intake air heating device at the air intake.

3.Strengthen the sealing performance of the cylinder;

4.Eliminate the empty source gas in the oil circuit, and use the hand pump oil to discharge the air in the high-pressure oil circuit.

5.Make sure that the battery is sufficient, especially for diesel vehicles, it is very difficult to start after a loss of power.

Many people will add hot water to the body when the diesel car is difficult to start, but it is strictly forbidden to add boiling water. Because the sudden addition of boiling water to the originally cold body can easily cause the cylinder head and body to crack.

1. If the temperature in the area is relatively low in winter, you can install a preheating device, and some high-end diesel vehicles will be equipped with a preheating device when they leave the factory. It is relatively normal for diesel vehicles to be difficult to open and close in winter, and the working principle of diesel engines is different from that of gasoline engines.

2. Gasoline engines have spark plugs, which are used to ignite combustible mixtures.

3. The diesel engine relies on compression ignition, so this engine does not have a spark plug ignition. In winter, the outdoor temperature is relatively low, and the temperature of the air is also relatively low, so it is normal for the diesel engine to be difficult to start in winter.

4. However, some high-end diesel cars have pre-heating devices on the fuel injector and diesel filter, which can make it easier to start.

5. Another reason why diesel vehicles are not good to start in winter is that the oil is not right, diesel is also marked, and the fluidity of diesel in different grades is different in low temperature environment.

6. Everyone must use the correct number of diesel according to the area where they are buried.

7. Before entering the winter, it is recommended that you replace the diesel filter element, and wash the carbon deposits in the oil circuit and engine in a clean state.

8. Carbon deposition is relatively harmful to the engine, and carbon deposition will affect the air intake and combustion of the engine.

9. The more effective way to remove carbon deposits is the walnut sand removal method, some repair shops will use the method of hanging bottles to clean up carbon deposits, it is recommended not to use this method, this method has a very poor effect.