How does a carburetor type gasoline engine work.

The carburetor must do two things: one is that it must vaporize the fuel; The second is to mix the vaporized fuel with a certain proportion of air to form a mixture.

The air from the outside world is filtered and enters the carburetor, and the amount of air intake is controlled by the change in the position of the choke. Air rushes through the throat inside the carburetor to create a suction force that draws the fuel out of the float chamber through the nozzle and atomizes it. The atomized fuel and air are mixed and sucked into the cylinder without an intake manifold.

The gas intake of the mixture is controlled by a throttle pedal, which is located inside the carburetor (throttle). The amount of oil pumped into the float chamber by the gasoline pump is controlled by the float in the float chamber. The float rises and falls in the float chamber with the amount of oil, and when the float chamber is filled with gasoline, the float floats up and blocks the oil inlet with its needle valve.

The driver changes the engine speed by controlling the size of the throttle opening, which is how the simple carburetor works (Fig. 3). The concentration of the mixture gradually becomes thicker as the throttle is opened.

The working condition of the automobile engine should often change in a wide range, such as before the car starts and before waiting for the green light to be released at the intersection, the engine is idling, the load at this time is zero, the throttle opening is the smallest, and the speed is the lowest; When the car is fully loaded and climbing, the throttle is fully open, but the rev is not high; On flat roads, the throttle does not have to be fully open, the engine emits a medium load, and the speed and revs are medium; Driving on the highway, the engine may be at full load and the revs are at its maximum. In so many complex operating conditions, the requirements for gas mixtures cannot be one-size-fits-all. For example, at idle speed and under small loads, the former requires the mixture to be very thick, while the latter requires the concentration to gradually thin; Under medium load, in order to save fuel, the carburetor is required to supply the mixture with the smallest fuel consumption; At full load, in order for the engine to produce maximum power, the carburetor is required to provide a concentrated mixture.

In addition, if the car starts cold, it is required to have a thicker mixture; When accelerating, the carburetor is required to supply additional fuel when the throttle is suddenly opened, etc.

acceleration devices; When the throttle is suddenly opened, it can supply additional fuel for a short time, so that the engine speed and power can be increased rapidly. Thickening device; The main oil supply device can be used to work with economic mixture in a wide range of throttle openings, so as to achieve the purpose of fuel saving. Idle speed device; This ensures that the engine is supplied with a thick and low mixture at idle speed and at very low load.

with carburetor. Compared with gasoline engines, electronically controlled gasoline injection systems have the following advantages:

The electronically controlled gasoline injection system makes it easy to control the fuel supply, and realizes the precise control of the mixture's air-to-air ratio and ignition advance angle, so that the engine can be in the best operating condition no matter what the situation.

An electronically controlled gasoline injection system can increase engine power.

Since the gasoline injection system does not heat the intake air, the compression temperature is low and detonation is not easy to occur, so a higher compression ratio is used.

to improve thermal efficiency.

The fuel atomization of the electronically controlled gasoline injection system is determined by the characteristics of the injector and has nothing to do with the engine speed, so the starting performance is good.

Degrees of freedom for electronically controlled gasoline injection systems.

large, multi-objective control can be achieved for power, economy and emissions; Due to the change of working conditions, altitude.

Temperature changes and other effects on the return of the oil supply system can be easily corrected by leaking the hood.

The electronically controlled gasoline injection system has good heat resistance.

When driving, the function of the carburetor is to mix air and gasoline together, atomize the gasoline, and spray it onto the engine. It can also control the start and stop of the engine to avoid the phenomenon that the engine is still rotating after the engine stalls, which provides a guarantee for the normal driving of the car. The carburetor is called the heart of the car engine, and the car engine needs the right amount of oil to lubricate the engine after it is driven.

This is where the carburetor comes into play, and the carburetor can spray a small amount of atomized oil to lubricate the engine. If you don't have a carburetor, your engine will be soaked in oil, which will inevitably cause waste. Due to the excessive amount of oil absorbed by the car engine, it will emit black smoke, which will cause a large amount of carbon to accumulate throughout the cylinder body, which will damage the car engine.

Moreover, the car carburetor can also control the amount of oil injected, so that the engine can be lubricated and save gasoline, so that the car can run normally.

1. The carburetor of the car can play the role of lubricating the engine and helping the engine to drive the car normally.

The car's carburetor fuses and disassembles gasoline and air together, then atomizes the gasoline and slowly sprays it onto the engine. At this point, the engine will be lubricated to help the engine drive the car properly. And when the engine does not need gasoline, the car's carburetor will also reduce the amount of gasoline that is sprayed, thus helping the car engine to operate normally.

Second, the carburetor of the car can also control the amount of oil used by the engine, which provides a guarantee for the safety of the car.

We all know that if the engine of the car fails, it is easy to induce spontaneous combustion of the car. Without a carburetor, the car's engine would run the shed on gasoline without restraint. At this time, the engine will emit thick smoke, and the vacuum state in the cylinder will be destroyed, causing safety hazards.

The carburetor of a car is the heart of the engine, and the engine cannot do without the carburetor during operation. So, do you know how carburetors work?

Summary. Hello, I'm glad to be able to answer your questions, since typing takes time, please wait a moment to sort out the information for you!

Hello, I'm glad to be able to answer your questions, since typing takes time, please wait a moment to sort out the information for you!

The carburet-powered bright engine has experienced the era of carburetor, single-point injection, and multi-point injection, and the technology has become more and more advanced. According to the fuel injection position, there are in-cylinder and out-of-cylinder injection, in which single-point injection and multi-point injection fuel are injected in the intake manifold, and the in-cylinder direct injection fuel type wide oil is directly injected in the cylinder.

In terms of technology, in-cylinder direct injection is better than multi-point injection, multi-point injection is better than single-point injection, from the cost, maintenance and other aspects of the travel factors, different including early song injection methods have their own advantages, in general, different price models will match the ** and the level of the corresponding injection technology.

Do you still have to buy this carburetor.

The state stipulates that carburetor cars will be eliminated in 2002, and now only motorcycles have carburetors, and cars have long been eliminated.

Now the device that replaces the carburetor is the engine EFI technology, or the in-cylinder direct injection technology.

This is used by a 2-inch gasoline sprinkler for watering the ground.

Do you want to change accessories?

That's right. It's hard to replace this kind now.

There are no more accessories, do you?

Well, the accessories are not easy to buy, and there are very few domestic ones to do this, let alone change them.

The carburetor is actually a tube with an adjustable plate in the middle of the tube called the bridge throttle plate that controls the flow of air through the tube. There is a shrinkage part in the tube called a venturi that creates a vacuum in this shrinkage section. This shrink part has a measuring hole from which fuel can be sucked in using a vacuum.

A carburetor is a mechanical device that mixes a certain proportion of gasoline with air under the action of vacuum generated by the operation of the engine. The carburetor is a delicate mechanical device that uses the kinetic energy of the inhaled air stream to atomize gasoline. Its important role in the engine can be called the "heart" of the engine.

Its complete device should include a starting device, an idle device, a medium-load device, a full-load device, and an acceleration device. The carburetor will automatically mix out the corresponding concentration according to the different working state requirements of the engine, and output the corresponding amount of nano-late mixture, in order to make the mixture mix more evenly, the carburetor also has the effect of atomizing the fuel for the normal operation of the machine. Carburetors are divided into simple carburetors and complex carburetors.

The carburetor can also be divided into down-suction and flat-suction. The carburetor is divided into the type of throttle, and can be divided into rotary type and lifting type. The rotary throttle valve is a disc-shaped throttle valve that rotates around an axis between the carburetor throat and the intake pipe to change the flow area of the intake channel.

The lifting throttle is constructed as a barrel plate throttle, which moves up and down at the throat to change the channel area of the throat, and the motorcycle carburetor mostly adopts this form. There is also a carburetor that is a hybrid of the two, with a person to control the rotating throttle and a diaphragm to control the lifting throttle, which is also often used on motorcycles, called CV type.

Photo by Luo Ting1) @2019