Dongfeng Yufeng generator suddenly cuts off the power and starts again. Check if there is any abnormal noise. 1. Learn to distinguish abnormal noises that are reasonable noises
For ordinary car owners, the problem of abnormal noises in cars is It's hard to tell which noises are faulty and which are legitimate. If you go to a repair shop to check for abnormal noise, only nearly 20% of the cars actually have a problem. There is bound to be a difference between the sound of a model equipped with a turbocharged engine and the sound of a naturally aspirated engine; models equipped with an engine guard may also produce noise due to friction; some car owners may be affected by their own noise after contacting different cars. Lack of understanding of mechanical knowledge, mistaking reasonable abnormal noises for vehicle failure. Therefore, learn to identify abnormal car noises to avoid wasting time and energy.
2. How to identify car noise:
In actual work, due to limitations of working conditions, it is difficult to use special instruments to measure car noise. The sound is similar to the "click-click" sound of a small hammer tapping on the cement floor.
1. Correctly distinguish between normal sounds and abnormal sounds.
When the car is working, the vibrations of various mechanisms will emit sounds of various natures, but the sound does not mean that the car is faulty. In order to avoid unnecessary disassembly, we must first distinguish between normal sounds and abnormal sounds. Normal sound. The engine and exhaust sounds of various system components, gear meshing noise, etc. are all normal sounds. Abnormal noises (abnormal noises) can be divided into slight noises, normal noises and malignant noises according to their impact on car performance. Slight noises, such as the flashing sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., are generally small in volume, the degree of wear of the parts is not large, and there is no significant change for a long time. Such faults can still maintain the car without repair. of normal driving.
3. When diagnosing abnormal car noises, attention should be paid to creating good auscultation conditions and trying to eliminate interference from other noises so as not to affect the accuracy of judgment.
It is best to consciously amplify or reduce the sound, that is, use a screwdriver or other metal rod as a stethoscope to contact the sounding part to amplify the sound, or use a single cylinder to cut off the fire to reduce the sound. , to meet diagnostic needs. The auscultation site should be kept quiet to minimize human interference.
3. Below we list some common abnormal car noises that are easy to eliminate and simple identification and elimination methods.
1. There are abnormal noises in the car body
Explanation of symptoms: When driving and stepping on the accelerator or braking, there are always some abnormal noises from certain parts of the car body. The sound is not loud and does not affect normal operation. Driving, but there is always a little worry that something is wrong.
Analysis of the problem: This problem usually occurs because the body stiffness is insufficient, causing the vehicle to deform while driving, the door and the frame rub or shake, or desoldering in some places causes friction between steel plates, etc. .
There are also some cars that have louder wind noise. To a certain extent, this is related to the shape of the car. In some cars, the body parts of some cars are not fixed well and may cause abnormal noise. Generally, tighten the screws. It can be solved.
Solution:
First check whether there are any unfixed objects in the trunk or rear seats that are easy to roll and make noise, and exclude the noise caused by some items not being fixed properly.
How to replace the Dongfeng Yufeng compressor belt
The fuel consumption of the Dongfeng Yufeng diesel version is 9-10L per 100 kilometers. Fuel consumption per 100 kilometers refers to the fuel consumption per 100 kilometers of a vehicle traveling at a certain speed on the road. It is a theoretical indicator of the vehicle. The 100-kilometer fuel consumption refers to converting the value measured by the generator installed on the vehicle chassis into the main parameter of speed in an objective environment, driving at the specified speed, and calculating the 100-kilometer fuel consumption data of the theoretical experiment of the vehicle model. The following is the corresponding relationship between vehicle fuel consumption. 1. Fuel consumption and exhaust volume are also related, and fuel consumption and exhaust volume are also related. This relationship is not absolute. A larger cylinder volume (displacement volume) can accommodate more combustible mixture (air fuel). Of course, if other conditions are the same, an engine with a larger cylinder volume (displacement volume) must have higher power and fuel consumption. . 2. Fuel consumption and speed. When driving in a car, the speed range is mostly between 1,000 and 3,000 rpm. The limit speed of an ordinary family car does not necessarily move up or down by more than 6,000 rpm. If the speed is maintained at twice the limit speed of a family car during a traffic jam competition, (10,000 revolutions), the fuel consumption will of course be very high. 3. Modify fuel consumption and vehicles, widen tires, increase tire friction, increase vehicle load, directly increase vehicle fuel consumption. At the same time, some car owners have modified their car's rear fins and car surrounds. Adding rear fins will undoubtedly increase the car's wind resistance. When the car is at low speed, the rear wing does not work at all, and the driving resistance must be increased to increase the load on the entire vehicle, which will affect the increase in fuel consumption.
1. Loosen the generator fixing screw and the belt tightness adjusting screw.
2. Push the generator against the engine so that the distance between the pulleys is the shortest, and then put the belt on and straighten it.
3. Adjust the tightness of the belt to the appropriate level and tighten the engine fixing screws and adjusting screws.