Open the engine hood of the gasoline generator parking air conditioner and leak oil. Check for abnormal noises. 1. Learn to distinguish abnormal noises from reasonable noises.
For car abnormal noises, it is difficult for ordinary car owners to distinguish which are defective abnormal noises and which are defective. which are reasonable abnormal noises. 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 vehicle breakdown. Learn to identify abnormal car noises to avoidter 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 the judgment of sounds to describe. and compare car noises. For example, the "squealing" noise caused by dry friction of the bearing, the "clicking" noise produced by excessive valve clearance, which is similar to the "clicking" sound of a small hammer hitting the ground in cement, etc.
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 noiseage, etc. are all normal sounds. Abnormal noises (abnormal noises) can be divided into light noises, normal noises and malignant noises according to their impact on car performance. 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 psound part in order to amplify the sound, or use a single cylinder to cut off the fire to reduce the sound, to meet the diagnostic needs. 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
Symptom description: 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 ou are shaking, or desoldering in certain places causes friction between the steel plates. , etc. .
Some cars also have more wind noise. To some extent this has to do with the shape of the car. There are also some cars where the body parts are not well fixed and can cause anomalies. Generally, tightening the screws will do the trick.
Solution:
First check whether there are any loose objects in the trunk or on the rear seats that are easy to roll and make sounds, and exclude some items that are not securely attached and emit sounds. . noise.
If you find that the friction between doors and windows causes abnormal noises, you can stick tape on the doors and windows or put rubber on the friction parts. You may be able to reduce or eliminate abnormal noises. , but the result is only a solutionion temporary and not the root cause of the problem. If none of the above problems are found, you should go to a regular repair shop for inspection and troubleshooting.
2. There are abnormal noises in the engine
Explanation of the symptom: There is a greater possibility of abnormal noises in the engine compartment. Most people also judge that abnormal noises come from the engine. engine compartment depending on the source of the sound, usually a metallic screech or hiss.
Problem Analysis: Abnormal noise coming from the engine compartment will include a loud whistling sound from the belt, which is usually caused by belt slippage. There will also be a sharp sound of dry rubbing of metal parts when the engine is running, which is usually due to damage to the bearings of the generator, water pump, and power steering pump. If the sound of ahe air leak is caused by the engine running, this may be the result of a blocked engine; exhaust system, vacuum tube leak or rupture.
Solution: Abnormal engine noise indicates that the technical condition of a certain engine mechanism has changed. This is mainly due to excessive wear of certain parts or poor assembly and adjustment. Certain abnormal noises can predict the possibility of accidental engine damage. Therefore, when abnormal noises occur in the engine, they should be repaired in time to prevent the fault from extending.
It is worth remembering that if there are abnormal noises in the engine, the car owner is unlikely to be able to solve it himself and it is better to send it to the factory for maintenance.
3. There is an abnormal noise in the gearbox
Explanation of symptoms: If there is a “rusting” noise inside the gearboxspeeds while the car is driving, but it disappears after the clutch or accelerator is depressed, replace it. A whistling sound will be heard when changing gears.
Problem analysis: If the source of the noise encountered while driving comes from the gearbox, it may be due to wear of the gearbox bearings or gears, or to rolling points. If the transmission makes an abnormal noise when accelerating and changing gears, the transmission oil may contain metallic powder, indicating excessive wear of components such as the clutch belt. brake of the gearbox.
4. There are abnormal noises in the tires
Symptom description: The tires emit rhythmic noises, and the faster the vehicle speed, the higher the frequency.
Analysis Problem: When a car tire comes into contact with the ground, it will producevarious noises of different strengths and weaknesses depending on the type or irregularities of the road, the speed of the car, the type of tire and the air pressure of the tire itself. Therefore, no matter how perfect a car is, it cannot completely eliminate the noise generated by tires and ground while driving.
5. The engine guard makes an abnormal noise.
Explanation of symptoms: The engine guard has been installed for some time, but after a ride in the suburbs, there was a noise at the skid plate at my return. Strange noise.
Solution: Screws tend to move on cars that move frequently. If you often hear something like the air intake grille. If the grille makes an abnormal "crunching" noise, in addition to the grille being really loose, the car owner should always check whether the screws of the engine protection plate are loose, or if the engine protection plateThe motor protection and film are loose, causing abnormal noise. . In addition to tightening the screws, you should also place cardboard-like objects on the abnormal sound areas to easily eliminate the abnormal noise.
6. Brakes make abnormal noises
Symptom description: The vehicle makes relatively loud noises and abnormal noises when the brakes are applied.
Problem Analysis: Of course, abnormal noise when braking may also be caused by other reasons, such as improper use or deformation of the brake disc material, hardness, porosity, friction characteristics and compression characteristics are not qualified, the brake pads and brake discs are wet and rusty, the metal wire in the brake pad formula is too hard, and the mechanical scrapers of the pads brakes are among the reasons. To resolveTo resolve this problem, simply brake vigorously several times in succession to eliminate the abnormal noise.
6. Brakes make abnormal noises
Symptom description: The vehicle makes relatively loud noises and abnormal noises when the brakes are applied.
Problem Analysis: Of course, abnormal noise when braking may also be caused by other reasons, such as improper use or deformation of the brake disc material, hardness, porosity, friction characteristics and compression characteristics are not qualified, the brake pads and brake discs are wet and rusty, the metal wire in the brake pad formula is too hard, and the mechanical scrapers of the pads brakes are among the reasons. To resolve this problem, simply brake vigorously several times in succession to eliminate the abnormal noise.
Solution:
The plateBrake lever is one of the most important parts of the brake system. Generally, the lifespan of the front brake pad is 30,000km and the lifespan of the rear brake pad is 30,000km. the brake pad is 30,000 km. The lifespan of dynamic friction plates is 120,000 km. If there is a "squealing" sound when applying the brakes, it is most likely a warning sound coming from the brake pad wear indicator, which indicates that the brake pad brake has exceeded its usage limit. When this happens, car owners should go to the car dealership for maintenance as soon as possible, otherwise the brake pads will be exhausted, causing damage to brake components, abnormal braking effect and accidents.
Why does the chimney of a gasoline generator emit fire and make a loud noise?
1. First, check if the engine oiland gasoline were recently added. If not, what was added. added before? If it is more than three months old, the engine oil and gasoline should be drained and replaced. Since engine oil and gasoline are only valid for three months, oil and gasoline used for more than three months have lost their viscosity and have no effect.
2. It is difficult for old gasoline generators to ignite. The reason is that the spark plugs have carbon deposits. They either have to clean them or replace them with new ones. too dirty, resulting in lack of air. To clean or replace. If the engine oil has melted, because if the machine is not used for a long time, the engine oil should be drained, and if the gasoline is qualified and it has evaporated, resulting in purity insufficient. Difficulty catching fire.
3. Check if the boot method is correct, for example if the interruptoil sensor is on, whether the shock absorber is closed when the cold engine starts for the first time, whether the starting method is correct, and whether it reaches the starting speed, etc., then troubleshoot in the order to first check the oil circuit, then the circuit, then the cylinder compression. First, turn on the crankcase oil drain switch, quickly pull the engine and identify the faulty area by observing the oil flow. If no or little oil flows from the oil switch, the mixture is not entering the cylinder or is too thin. If there is a lot of oil leaking from the oil switch, the mixture is too rich. The reason may be that there is a problem with the oil supply system or the starting method is incorrect.
4. Remove the high voltage wire from the spark plug and test the fire: if there is no spark or if theincelle is very low, this means there is a fault with the magneto or high voltage. thread ; If the spark is strong, it means there is a fault with the spark plug or the cylinder is leaking and the mixture is poorly compressed. Next, check or replace the spark plug. If it is confirmed that the spark plug is functioning normally, further check the compression condition of the cylinder. Poor mixture compression in the cylinder may be due to a leak in the cylinder or a leak in the crankcase. The location of the leak can be detected through external inspection. If the air leak is caused by excessive mounting clearance (such as mounting clearance between the piston and the cylinder wall or various parts of the piston ring, etc.) or damage to the parts, the machine must be dismantled and inspected. For certain magneto and multi-cylinder gasoline engines using battery ignition systems, once the ecarment and turntable angle adjusted, it is necessary to check and adjust the ignition time and correct the ignition sequence, because if the ignition sequence is disturbed, the machine will not easy to start.
The German generator from Rennes is long. is used, the better. A qualified generator is not worn out, but worn out, so it is better to start the generator 1-2 times a month.
Is it normal for a car generator to heat up?
This and other generator tips: This is mainly because your generator may be overloaded!
Causes of chimney fires in gasoline generators
Chimney fires in gasoline engines are usually caused by unburned fuel or oily deposits released from the engine.heminated with gas at high temperature then burned. in the air, that is, the continuation of the fuel combustion process in the cylinder. Let’s take a look at the detailed explanation from generator accessories manufacturer Sardon.
1. Sparks formed by burning oil mist are difficult to detect during the day, but small, short light pink sparks can be seen coming out of the chimney at night. Most of the sparks go out in the stream of smoke that follows them, without any scale or black particles falling. This situation often occurs when the gasoline engine is overloaded, the fuel atomization in some cylinders is poor, or the air supply to the cylinder is insufficient. The fuel injected into the cylinder cannot be completely burned and there is excessive oil mist or fine oil droplets. in the cylinder are evacuated by the high tempperature. When gas is fed directly out of the chimney, it burns when it encounters oxygen.
2. Sparks formed by burning residual oil. These sparkles are slightly longer in shape and darker in color than those above. They rush into the sky from the chimney and drift with the wind before dying out. fine carbon particles and soot ribbons. This usually occurs when some injectors in a gasoline engine drip oil or have poor combustion during low load operation. Especially when the temperature and pressure of the exhaust system are low for a long time, unburned oil often accumulates in the exhaust tract even though. it is also removed from the chimney. It is difficult to ignite with gas at low temperatures. Some old gasoline engines use the exhaust gas boiler bypass method.ent to vent the gas directly to avoid contamination of the heating coil in the boiler. On modern ships, most bypass smoke exhaust pipes have been removed. The gas can only be discharged through the exhaust gas boiler, and the exhaust back pressure increases. Therefore, the accumulation of oil in the flue of a two-stroke gasoline engine operating at low load will gradually increase. The accumulated residual oil has undergone a physical and chemical preparation process before ignition. If there is enough air, when the exhaust temperature is higher than 210°C or an open flame is encountered, it will catch fire at the chimney outlet inside the exhaust. pipe.
3. Sparks formed by the combustion of soot deposits. Most sparks emitted from the chimney are plate-shaped. Sparks usually occur for a short timeafter the trip and 10 to 15 days after the trip, and the duration of the flame varies from half an hour to three hours. During the day it is not noticeable because of the light, but at night it is very shocking. This type of sparkle has a large bright spot, is black and red, and lasts a long time. Ashes and solid particles of different shapes come out of the chimney with the spark. They often fall onto the deck and continue to burn. which can easily cause fires. Generally speaking, in the exhaust system, there is little fire in the pipeline section from the compressor outlet to the exhaust gas boiler inlet, and there is no not much soot on the superheated steam coil of the exhaust gas boiler. However, dense heating fins are often found on saturated steam coils and numerous solid deposits on the funnel-shaped parts of gas boilers ofexhaust. These deposits are the main source of sparks.
Here are the reasons for chimney fires from gasoline generators. I hope this information can be useful to you. Below we will focus on preventive measures and solutions:
Gasoline Generator chimney fire preventive measures:
1. Maintain combustion in the cylinder of the gasoline engine in good condition
2. Strengthen monitoring of the combustion process of each cylinder; detect abnormal conditions in time;
3. Strengthen the management of exhaust gas boilers to maintain good combustion effects;
4. Put suitable carbon remover and other chemicals into the tailpipe or exhaust; gas boiler regularly, in order to prevent scale and clean the system, carbon deposits on the pipe wall can be softened, removed and evenburned after lowering the ignition point
5. the tanker, the chimney is equipped with a sprinkler fire extinguishing device.
Emergency treatment for gasoline generator chimney fire
1. If the first type of spark occurs, immediately reduce the load on the gasoline engine or slowly stop it, find the cause and eliminate it. the fault before continuing. Use it, then increase it to the required load once the smoke evacuation is normal.
2 If the second and third types of sparks appear, they must be allowed to continue “spraying”. if the environment permits, so that the exhaust gas blows and burns the oily deposits in the system as much as possible, but the maintenance management and fire prevention work of the gasoline engine and gas boiler exhaust must be reinforced;
3. In addition to fires excessive, individual cylinders or local exhaust pipes should be reduced to overheat off-speed, the gasoline engine should operate at high load as much as possible; >4. Do not use fire extinguishing equipment, especially CO2 fire extinguishing equipment, to prevent high temperature metal from exploding due to a sharp drop in temperature.crack.
References:
I hope this is helpful!
It is normal for the generator to generate heat during operation.
The automobile generator is the main source of power for the car. Its function is to power all electrical equipment (except the starter) and to charge the battery when the engine is running normally.
Based on the three-phase stator winding of an ordinary alternatore, the number of winding turns is increased and the terminals are taken out, and a set of three-phase rectifier bridge is added. At low speed, the original winding and the additional winding are output in series, while at higher speed, only the original three-phase winding is output.
Detailed information:
1. Principle of gasoline generator:
< p>The gasoline engine operates the generator, converting gasoline energy into electrical energy.In the cylinder of the gasoline engine, the mixed gas burns violently, expands rapidly in volume, and pushes the piston down to do work.
Whether it is a diesel generator or a gasoline generator, each cylinder performs work in a certain order. The thrust acting on the piston becomes the force that causes the crankshaft to rotate through the connecting rod, thus driving the engine. crankshaftto turn. By installing the brushless synchronous alternator coaxially to the crankshaft of the electric machine, the rotation of the electric machine can be used to drive the generator rotor. Using the principle of "electromagnetic induction", the generator will produce induced electromotive force. and a current can be generated through the closed charging loop.
2. Precautions for use:
① Frequently clean the scale and dust on the appearance of the generator and keep it clean and well ventilated.
② Frequently check the tightening condition of the generator-related fasteners and tighten the screws in time.
③The tension of the transmission belt must be appropriate. If it is too loose, it will slip easily and result in insufficient power production; if it is too tight, it will easily damage the belt and generator bearings.
④When installing the battery, be careful not toinstall it incorrectly. Usually, install the positive wire first and not the ground wire, otherwise the diode will burn out easily.
⑤ When using an integrated circuit regulator, the ignition switch should be turned off immediately when the engine is not running.
⑥ It is never allowed to use the “scraping” method to test whether to produce electricity.
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