carburetor for suzuki,How the carburetor works
01 Jan

carburetor for suzuki,How the carburetor works

The carburetor is a mechanical device that mixes a certain proportion of gasoline and air under the action of the vacuum generated by the operation of the engine.

The gasoline enters the carburetor from the fuel tank through the gasoline filter, which can filter out the impurities mixed in the gasoline and the oxide skin in the fuel tank. If the quality of the filter is defective, some impurities still enter the carburetor through the filter. In addition, gasoline contains components that can form colloids. After long-term deposition, the colloid will condense and adhere to carburetor parts (such as measuring holes), oil passages and float chamber surfaces.

Air enters the carburetor through the air filter. Considering that the intake resistance cannot be too large, the filter device cannot be too dense, so some tiny impurities in the air will still enter the carburetor through the air filter. If the filter quality is defective, it will cause more serious effects.

There are many parts in the oil channel and air channel of the carburetor, such as the main measurement hole, idle speed measurement hole, main air measurement hole, idle speed air measurement hole, main foam tube, etc. (~1.5mm), gasoline impurities, gum and Impurities in the air entering the carburetor will often change or block these apertures, resulting in poor air and oil passages in the carburetor, changing the characteristics of the oil supplied by the carburetor, and even causing carburetor performance failures.

 

Normal maintenance of the carburetor

 

The normal maintenance of the carburetor is actually to maintain the cleanliness of the carburetor when it leaves the factory. This is controlled by professional carburetor manufacturers such as our company as a key indicator for carburetor quality evaluation. The company's control standards, using a variety of advanced equipment and technology, strictly control each link of production. Therefore, in order to ensure the normal use of the motorcycle, we must pay attention to the normal maintenance of the carburetor: clean the carburetor regularly, keep the oil passage and air passage of the carburetor clean, and the small aperture is unobstructed. This is also very important for extending the life of the carburetor. As a rule of thumb, many carburetor performance failures can be resolved by cleaning the carburetor regularly.

Carburetor normal maintenance precautions:

1: The carburetor is a key component of the engine, and minor changes may affect the performance of the vehicle. Therefore, during the disassembly and assembly of the carburetor, appropriate tools should be used, and the force should be moderate to prevent deformation of the parts. Disassembled parts should be neatly placed to prevent loss or misassembly during assembly.

2: The cleaning of the carburetor should be carried out in a clean place. Start by wiping the outside surfaces of the carburetor and clean the interior parts with a carburetor or industrial gasoline-specific cleaner. In addition to impurities, pay attention to cleaning the gasoline glue on the surface of the parts. The cleaned parts should be blown clean with compressed air, and cannot be wiped with cloth or paper to avoid burrs and prevent recontamination. Blocked holes should not be opened by hard objects such as steel wire to prevent changes in carburetor performance caused by changing the hole diameter. Gasoline or compressed air should be used for cleaning and flushing.

3: During the assembly process of the carburetor, the connecting screws of the float chamber, the connecting screws of the carburetor and the engine should not be tightened at one time, but must be tightened several times. Usually, the tightening torque is between 12N.m and 15N.m. Otherwise, the joint surface will be deformed, and air or oil leakage will occur. The tightening torque of the measuring hole parts is generally between 1.5N.m~3.0N.m. Excessive tightening torque will damage the thread, cause deformation of parts, and even produce metal debris, causing secondary pollution and affecting the performance of the carburetor.

4: In the process of cleaning the carburetor, if there is a lot of sediment in the float chamber of the carburetor, it is often caused by the failure of the gasoline filter. At this point, the gasoline filter should be checked, and if it is confirmed to be invalid, it needs to be cleaned or replaced with a new one.

5: If the motorcycle is not used for a long time, the fuel needs to be drained in the carburetor float chamber to prevent the colloidal deposition of gasoline from condensing and causing the carburetor to malfunction. Furthermore, it should be emphasized that the position of the idle speed adjustment screw has a significant impact on the performance of motorcycle emissions, idle speed, transition and fuel consumption. When cleaning the carburetor, it is generally forbidden to move the idle air adjustment screw (see picture). If you need to remove the idle air adjustment screw, screw the adjustment screw to the end first, remember the number of turns (accurate to 1/8 of a turn), and return to the original number of turns during assembly.

 

Typical Carburetor Failure Analysis and Removal Carburetor

 

As a precise mechanical device, it plays an important role in the engine and can be called the "heart" of the engine. From a professional point of view: the failure rate of the carburetor itself is extremely low. But why is the failure rate of carburetors often not low in actual use? There are two reasons for this: (1) Since all the working characteristics of the engine are related to the carburetor, such as acceleration, transition, fuel consumption, etc. Therefore, when judging the cause of motorcycle performance failure, the failure of electrical components or other mechanical components is often confused with the carburetor, and the carburetor is wrongly judged as the failure of the carburetor, and the carburetor is replaced. For example, a faulty filter causes impurities to clog the carburetor, and replacing the carburetor with a new one eliminates the fault, but does not solve the underlying problem. (2) The quality problems of related parts greatly shorten the service life of the carburetor. Such as reduced cleanliness, increased wear and tear of carburetor parts, etc. As a professional carburetor manufacturer, we often encounter similar problems in our cooperation with motorcycle manufacturers. The following introduces the analysis and elimination of some typical faults of the carburetor.

  • start up

Difficulty • Idling

unstable • transition

Bad • Motivation

Insufficient • Carburetor leaking oil

  • fuel consumption

High The above are several common fault phenomena of motorcycles, only the faults of the carburetor are selected for analysis. But in fact, from the perspective of the whole machine, there are many factors that cause the above-mentioned failure phenomenon. Such as difficulty in starting: the disorder of the ignition system and the change of the spark plug electrode gap will cause difficulty in starting. Such as unstable idle speed: In order to reduce the sound of the engine cylinder head, motorcycle manufacturers often adjust the engine valve clearance too small, which leads to the deterioration of engine intake and exhaust conditions, and the occurrence of unstable or even no idle speed. The user needs to analyze the fault condition of the vehicle in detail.