Analysis of the structure of the main oil supply unit in the carburetor

Category:Fault example - Date:2015-11-19

original video: the structure and working principle of carburetor main oil supply device and the control principle of dual chamber separate operation.

in the carburetor age, with the increase of the throttle opening at small and medium load, the engine needs to be gradually dilute mixed gas, and when the load is large, the mixture needs to be thickened. The main oil supply device of carburetor realizes the mixture of gradually dilute mixture by increasing the opening of throttle valve, and the change of mixture concentration is always lean. After the heavy load, the carburetor is equipped with the enrichment device and the main oil supply device to realize the enrichment of the mixture.

The working principle of the carburetor

The composition of the main oil supply unit:

carburetor main oil supply device is composed of main oil volume hole, main nozzle, main air volume hole, foam tube and seepage hole. The important part is the design of the foam tube, the foam tube is a hollow copper tube, and the upper end has a small hole called the main air quantity hole, and the lower part has several gas holes.



The structure diagram of the main oil supply unit

from the chart, we can see that the air chamber, foam tube and air hole of carburetor main oil supply device.

Carburetor The working principle of the main oil supply unit:

When the engine is not working, the oil surface of the air chamber and the float room is high. After the engine is working, the main nozzle is injected and the oil surface of the air chamber drops, but the gas of the float chamber is filled with the main oil hole to fill the air chamber and maintain the oil surface of the air chamber and the float room.



throttle opening hours, air chamber and float chamber oil surface height.

When the opening of the throttle is increased, the main nozzle fuel injection accelerates, and the flow velocity of the main oil hole gasoline increases. When the main oil supply is not satisfied with the main nozzle, the oil surface of the air chamber drops and the air hole is exposed, a little air is entered into the air chamber by the main air volume hole and the air hole, thus reducing the vacuum degree of the main oil volume hole. Suction) reduces the oil output, thereby increasing the opening of throttle valve and increasing the supply of dilute mixture.



when the throttle opening is large, the oil level of the air chamber decreases, and the air is compensated.


The role of the main oil supply unit in carburetor:

Through the analysis of the structure and principle of the main oil supply device, it can be seen that the function of the main oil supply device is to supply the gradually dilute mixed gas with the increase of the opening of the throttle, so as to meet the working needs of the small and medium load of the engine.

the car carburetor generally adopts a double chamber method, because there are main cavity and two throttle, which means that there are two sets of main oil supply units. Their main oil size, main air volume aperture and foam tube porosity are not the same, and the cleaning carburetor must be distinguished in advance.

Car safety knowledge and safety belt and headrest must not be careless
Regular cleaning of throttle can prevent high risk of idle speed
Vehicle acceleration is weak. How to clean throttle idle motor?
The reason why the car accelerates its weakness is carbon dioxide cleaning and throttle
Turbochargers start with idle speed for three minutes after starting
Turbochargers should be idle for three minutes after starting
Improper use of turbocharged driving skills - vulnerable engine
Improper use of turbocharged driving skills can easily damage the engine
Improper use of driving technology for turbocharged vehicle
The trade-off between price and performance should choose which tire
4S shop loves you, is not easy to repairman explosion 5 big screen
Car maintenance in summer moving and static combined effect is better
Winter snowy travel difficult, safe driving three keys
In winter driving, attention should be paid to external circulation and closing of air conditioners
Winter cold driving needs to know how to prevent frosting
A car with less mileage but has been driving for a year should not be maintained
Mileage does not decide whether to maintain for half a year
Three months or a certain mileage, less driving and maintenance
Minor defects should be repaired in time, buzzing and bearing problems
On rainy days, scientific driving is the key. Immediate cleaning and maintenance can not be forgotte
Search
Search

Category

Recommend

Hotspot


Car6s car maintenance technology website Copyright @ 2017-2022