The Dongfeng Yufeng generator suddenly cuts off the power and restarts. Check for abnormal noise. 1. Learn to distinguish abnormal noises that are reasonable noises.
For ordinary car owners, the problem of abnormal noises in cars is that it is difficult to tell which noises are faulty and which are legitimate. If you go to a repair shop to check for an abnormal noise, only about 20% of cars actually have a problem. There is obviously a difference between the noise of a model equipped with a turbocharged engine and the noise of a naturally aspirated engine; models equipped with a crankcase may also produce noise due to friction, some car owners may be affected by theirs; noise after contacting different cars. Lack of understanding of mechanical knowledge, confusing reasonable abnormal noises with a panne of the vehicle. So learn to identify abnormal car noises to avoid wasting time and energy.
2. How to identify car noise:
In actual work, due to the limitations of working conditions, it is difficult to use special instruments to measure car noise. the “click-click” sound of a small hammer tapping on the cement floor.
1. Correctly distinguish between normal and abnormal sounds.
When the car is running, the vibrations of various mechanisms will make sounds of different kinds, but the sound does not mean that the car is defective. In order to avoid unnecessary disassembly, you must first distinguish what is normal. abnormal sounds and sounds. Engine and exhaust noises from various system components, gear noise, etc. are all normal sounds. Abnormal noises (abnormal noises) can be divided into light noises, normal noises and noises smart depending on their impact on the performance of the car. Slight noises, such as the flashing sound of high-voltage electrical leakage, the slight rolling noise of bearings, etc., are generally small in volume, the degree of wear of the parts is not large, and it does not There is no significant change for a long time. Such defects can still keep the car without repair 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 sound part to amplify the sound , or use a single cylinder to cut off the fire to reduce the sound, to meet the needs ofdiagnostic. The monitoring site must remain quiet to minimize human interference.
3. Below we list some common abnormal car noises that are easy to eliminate along with simple methods of identification and elimination.
1. There are abnormal noises in the body
Explanation of symptoms: When you drive and step on the accelerator or when braking, there are always abnormal noises in some parts of the body. .The sound is not loud and does not affect normal operation, but there is always a little worry that something is wrong.
Problem analysis: This problem usually occurs because the rigidity of the body is insufficient, causing the vehicle to deform while driving, the door and frame to rub or shake, or desoldering to certain places causes friction between the steel plates. , etc. .
Some carss also have louder wind noise. To some extent this has to do with the shape of the car. In some cars, body parts are not properly secured and may be the cause. abnormal noise. Generally, tighten the screws. This can be resolved.
Solution:
First check whether there are any loose objects in the trunk or on the rear seats that are easy to roll and make noise, and remove the noise caused by certain elements that are not correctly fixed.
Alternator belt installation diagram
The fuel consumption of 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. This is a theoretical vehicle indicator. Fuel consumption per 100 kilometers refers to the conversion ofvalue measured by the generator installed on the vehicle chassis as the main speed parameter in an objective environment, driving at the specified speed and calculating fuel consumption data over 100 kilometers of the theoretical experiment. of the vehicle model. Here is the corresponding relationship between vehicle fuel consumption. 1. Fuel consumption and exhaust gas volume are also related, and fuel consumption and exhaust gas volume are also related. This relationship is not absolute. A larger cylinder volume (volumetric volume) can accommodate more combustible (air-fuel) mixture. Of course, if other conditions are the same, an engine with a larger cylinder volume (volumetric volume) must have higher power and fuel consumption. 2. Fuel consumption and speed. When driving a car, the speed range isgenerally between 1000 and 3000 rpm. The speed limit of an ordinary family car does not necessarily increase or decrease by more than 6,000 rpm if the speed is kept at twice the speed limit of a car. family car during a competition in traffic jams (10,000 laps), fuel consumption will, of course, be very high. 3. Change the fuel consumption and vehicle, widen the tires, increase tire friction, increase the load of the car, and directly increase the fuel consumption of the car. At the same time, some car owners have modified their car's rear spoilers, surrounds, etc. Adding rear spoilers will undoubtedly increase the car's wind resistance. When the car is driving at low speed, the rear spoiler has no effect, and the driving resistance needs to be increased to increase the load on the vehicle, which will affectincreased fuel consumption.
As shown below:
The generator belt of this model should drive the vehicle's generator and compressor. It is driven by the engine crankshaft, between the generator and the compressor. the compressor. There is an idler pulley, which is used to give belt pressure to the generator and compressor pulleys, and there is an idler pulley on top, which has the same function. The tensioner on the crankshaft pulley is an automatic tensioner, which generates real-time belt pressure according to the operation of the engine belt, allowing the belt to maintain the most precise tension.
Generator belt notes:
1. The grooved side of the pulley must match the groove of the belt, to ensure that the belt will not come loose from the pulley.
2. The flat side of the pulley must match theplane side of the idler pulley and the tensioner pulley to avoid excessive wear of the belt.
3. When replacing the belt, it is best to replace the tensioner at the same time.
4. The belt should be checked frequently for cracks, and if so, it should be replaced.