How does a car diaphragm gasoline pump work?

The petrol pump is installed in the car's fuel tank and is powered by electricity, which means that after you twist the key and before the car starts, the petrol pump is already working.

The oil pump is driven by the power of the engine, and its working process is completed by gears. Only after the car is started does the pump start working!

Diaphragm pumps, also known as control pumps, are the main type of actuators, which receive the control signals output by the modulation unit. Diaphragm pumps use power operation to change fluid flow. Diaphragm pumps are available in four materials:

Plastic, aluminum, cast iron and stainless steel. According to different liquid media, the diaphragm pump adopts nitrile rubber, neoprene, fluorine rubber, polyvinylidene fluoride and polytetrafluoroethylene. Meet the demand.

It can pump a variety of media that cannot be pumped by conventional pumps in various special occasions.

According to the power used by the actuator, diaphragm pumps can be divided into pneumatic, electric and hydraulic, that is, pneumatic diaphragm pumps with compressed air as the power source, electric diaphragm pumps with electricity as the power source, and electro-hydraulic diaphragm pumps with liquid medium (such as oil) as the power source with pressure as the power source. In addition, according to its functions and characteristics, there are solenoid valves, electronics, intelligent fieldbus diaphragm pumps, etc. Diaphragm pumps are available in a variety of product types and constructions, constantly updated and changing.

In general, valves are universal and can be matched with pneumatic actuators, electric actuators, or other actuators. There are five materials commonly used in air-operated diaphragm pumps: plastic, aluminum alloy, cast iron, stainless steel, and PTFE diaphragm gasoline pumps are representative of mechanical gasoline pumps.

It is used in carburetor engines.

It is usually driven by an eccentric wheel on the camshaft. Its working conditions are as follows:

When the eccentric wheel rotates at a certain angle and does not jack the rocker arm, the pump diaphragm spring stretches out, jacks the pump diaphragm and rises, pressing the gasoline from the outlet valve into the carburetor float chamber. Diaphragm gasoline pumps are characterized by a simple structure, but due to the thermal influence of the engine, special attention should be paid to ensure the performance of the pump oil at high temperatures and the heat and oil resistance of the rubber diaphragm.

Oil suction: When the cam rotates, the eccentric device pushes the pump oil rocker arm. The pump membrane is pulled down and the spring is compressed.

At this time, the volume above the pump membrane increases, the pressure decreases, and the suction force is generated, so that the oil outlet valve is closed, and the gasoline enters the pump chamber from the fuel tank through the gasoline filter inlet valve. Oil Delivery: The cam continues to rotate.

After the eccentric wheel rotates, the ordinary oil rocker arm spring is pushed back, and the pump diaphragm spring pushes the pump diaphragm upward. The gasoline in the pump chamber is delivered from the oil outlet flash pressure to the carburetor float chamber.

The role of the gasoline pump is to suck the gasoline out of the tank and press it into the carburetor float chamber through the tubing and the gasoline filter. It is because of the gasoline pump that the gasoline tank can be placed in the rear of the car, away from the engine and below the engine. According to the different driving methods, gasoline pumps can be divided into mechanically driven diaphragm type and electric drive type.

The role of the gasoline pump is to suck the gasoline out of the tank and press it into the carburetor float chamber through the tubing and the gasoline filter. It is because of the gasoline pump that the gasoline tank can be placed in the rear of the car, away from the engine and below the engine.

The diaphragm gas and oil pump works like this: oil suction: when the cam rotates, the eccentric wheel pushes the pump oil rocker arm, and the oil is fed: after the cam continuously rotates the eccentric wheel, the oil rocker arm spring pushes back the pump membrane spring, pushes the pump membrane upward, and the gasoline in the pump chamber will come up.

I don't know how the diaphragm gasoline pump works, because I don't know much about this kind of gasoline pump, and I don't usually pay much attention to it, so I will go to some books to learn.

I think this is a more professional working principle, which means that in the process of the cam rotation, the top of the eccentric wheel will shake, the spring will be compressed, and the pressure will be reduced to produce suction, and then the gasoline will be pushed into the filter.

I know that the contact between the corrosive material and the live column can be prevented during the working process, and the work and operation of the cylinder cavity can be promoted.

The air compressor is used, and the compressed air becomes the power source to absorb various corrosive liquids.

I don't want to know, because I'm not particularly interested in promotion, and I'm not particularly optimistic overall.

The working principle of a mechanical diaphragm gasoline pump.

On one side of the diaphragm is the oil chamber. The mechanical movement is connected to the diaphragm movement. The volume of the oil chamber is expanded, the vacuum level is increased, the oil inlet valve is opened, and gasoline enters.

The mechanical movement causes the oil chamber to shrink, the inlet valve to close, and the outlet valve to open, thus pumping the gasoline up. There are many forms of oil valves, collectively known as check valves.

There are two main forms of operation of diaphragm air pumps:

1.Oil suction: When the cam rotates, the eccentric device pushes the pump oil rocker arm, pulls down the pump membrane, and the spring is compressed. At this point, the volume above the pump membrane increases, the pressure decreases, and a suction force is generated, which causes the outlet valve to close, and the gasoline enters the pump chamber from the tank through the inlet valve of the gasoline filter.

2.Oil supply: The cam continues to rotate, pushing the diaphragm up and down. After the eccentric wheel rotates, the oil supply rocker arm spring pushes backwards, and the oil pump diaphragm spring pushes the oil pump diaphragm upward, so that the gasoline in the pump chamber is transported to the carburetor float chamber.

During operation, the flow rate of the gasoline pump should not only provide the fuel consumption required for the operation of the engine, but also ensure sufficient return oil flow to ensure the pressure stability and sufficient cooling of the fuel system. The maximum fuel supply of an ordinary gasoline pump is times the maximum fuel consumption of a gasoline engine. When the pump oil volume is greater than the fuel consumption and the needle valve in the carburetor float chamber is closed, the pressure in the oil pump outlet line rises and reacts to the oil pump, shortening the diaphragm stroke or stopping the operation.

The maintenance method of the gasoline pump is as follows:

1.Do not use aqueous substances for vacuuming;

2.After removing most of the solvent in the oven, vacuum is evacuated;

3.Use the vacuum pump in the correct order;

4.Add the specified brand of lubricating oil;

5.Fuel must be clean and free of impurities and moisture.

The reasons for the abnormal noise of the gasoline pump are as follows:

1.The check valve of the gasoline pump is damaged, there is no residual pressure, and it is difficult to start;

2.The impeller of the centrifugal pump is worn, the oil supply pressure drops, and the acceleration is weak;

3.The carbon brushes are worn out, and the gasoline pump stops running;

4.Mechanical failures such as rotor jamming and rising operating current of the oil pump lead to damage to the relay or fuse.

Actually, I don't know exactly how this petrol pump works, and I certainly don't know because I don't know at all, and one of the things I focus on on a day-to-day basis is not these things.

Obviously, the work is carried out by mechanical movement, and the movement is connected so that the volume is expanded, and the gasoline can be entered, so that it can work normally.

It's not really clear, it's a particularly professional concept, the working principle is difficult to read, and this accessory is a particularly important part of the engine.

Aware. It's not clear, people who have studied car maintenance know about this, people who don't know about cars don't.

Aware. It's not very clear, because I never cared about that, although I had a car, but I never drove it.

Oil absorption: When the cam rotates, the eccentric wheel pushes the pump oil rocker hole. Pull down the pump membrane, the spring is compressed, at this time, the volume of the pump membrane increases, the pressure decreases, and the suction force is generated, so that the oil outlet valve is closed, and the gasoline enters the pump room from the fuel tank through the gasoline filter inlet valve.

Oil supply: the cam continues to rotate, after the eccentric wheel rotates, the oil rocker arm spring pushes back, the pump membrane spring pushes the pump membrane upward, and the vapor-sensitive oil in the pump chamber is sent to the carburetor float chamber from the oil flash pressure.

For many people who like to know about cars or maintain cars, they will also know about some cars and their devices in their daily lives. For example, like a diaphragm gasoline pump, many netizens actually don't know what kind of way he works in the process of hearing such a term. A diaphragm gasoline pump like this mainly works in two directions, such as oil suction or oil delivery.

Work in two directionsFirst of all, if you look at the gasoline, he is when his cam is turning, like his eccentric wheel is nailing this rod oil rocker, and through such a movement will pull down the pump membrane. And the spring will also be compressed at this time, in which case a volume above the pump membrane may also increase at this time, and the pressure will also decrease. So there is also an attraction through these activities that causes the oil valve to close, and the gasoline can also enter the oil valve through the tank and through the filter of the gasoline.

Gasoline can also be sent through this fuel tank, and finally can enter such a pump chamber again, such a process, it is also through this cam in the process of continuing to rotate, this bias wheel can be rotated after the oil rocker arm can be bounced back. And then push back, and then such a pump membrane spring, it pushes the burst membrane upward, in the case of such a series of actions, this kind of gasoline in the pound chamber can be sent from its oil flash pressure to the float type of the carburetor.

The oil enters the working environment, and such a set of operations can allow the entire gasoline oil to enter the working environment, so that the whole car can be started accordingly. Therefore, after understanding these aspects of knowledge, you can also do a good job of maintaining your car in daily life, and it is also very necessary for some people who understand and learn the automotive industry. And a working principle like this can also allow everyone to choose different oil pumps in daily life, such as electric oil pumps or grinding disc oil pumps such as unloading.

Oil suction: When the cam rotates, the eccentric wheel pushes the pump oil rocker arm. Pull down the pump membrane, the spring is compressed, at this time, the volume above the pump membrane increases, the pressure decreases, and the suction force is generated, so that the oil outlet valve is closed, and the gasoline enters the pump room through the oil inlet valve of the gasoline filter from the fuel tank.

Oil feeding: the cam continues to rotate, after the eccentric wheel rotates, the oil rocker arm spring pushes back, the pump membrane spring pushes the pump membrane upward, and the gasoline in the pump chamber is sent to the carburetor float chamber from the oil flash pressure.

There are two main forms of operation of diaphragm gas and oil pumps.

1. Oil suction: When the cam rotates, the eccentric wheel pushes the pump oil rocker arm, pulls down the pump membrane, and the spring is compressed, at this time, the volume above the pump membrane increases, the pressure decreases, and the suction force is generated, so that the oil outlet valve is closed, and the gasoline enters the pump room from the fuel tank through the gasoline filter oil inlet valve.

2. Oil feed: the cam continues to rotate, pushes the diaphragm up and down, after the eccentric wheel rotates, the oil supply rocker arm spring pushes back, and the oil pump diaphragm spring pushes the oil pump diaphragm upward, so that the gasoline in the pump room is sent to the carburetor float room.

Oil suction: When the cam rotates, the eccentric wheel pushes the pump oil rocker arm. Pull down the pump membrane and the spring is compressed, at this time above the pump membrane.

The volume increases, the pressure decreases, and the suction force is generated, so that the oil outlet valve is closed, and the gasoline enters the pump from the fuel tank through the oil inlet valve of the gasoline filter.

Room. Oil supply: the cam letter continues to turn the hail preparation, after the eccentric wheel rotates, the oil rocker arm spring pushes back, the pump membrane spring pushes the pump membrane upward, and the gasoline in the pump chamber is sent from the oil flash pressure to the carburetor float source chamber.

Oil suction: When the cam rotates, the eccentric wheel Qi Xun pushes the pump oil rocker arm. When the pump membrane is pulled down, the slippery spring is compressed, and the volume on the pump membrane increases, the pressure decreases, and the suction force is generated, so that the oil outlet valve is closed.

When the cam rotates, the eccentric wheel pushes the pump oil rocker arm. Pull down the pump membrane, the spring is compressed, at this time, the volume above the pump membrane is increased, the pressure is reduced, and the suction force is generated, so that the oil outlet valve is closed and not, and the gasoline enters the pump room through the oil inlet valve of the gasoline filter from the fuel tank. Fuel Delivery:

The cam continues to rotate, after the eccentric wheel rotates, the oil rocker spring pushes back, the pump membrane spring pushes the pump membrane upward, and the gasoline in the pump chamber is sent from the oil flash pressure to the carburetor float chamber.

Through the movement of the diaphragm and the check valve, a vacuum is formed to suck the oil into the cavity, and then extrude under pressure to realize the pumping of oil. If it helps.

The general direction of the corresponding work first of all from the gasoline point of view, he only searched when his cam was rotating, like his eccentric wheel in nailing this rod oil rocker, and through such a movement boy will pull down the pump membrane. And the spring will also be compressed at this time, in which case a volume above the pump membrane may also increase at this time, and the pressure will also decrease. So there will also be a kind of through these activities.

How is the diaphragm gas and oil pump made of oil absorption: when the cam rotates, the eccentric wheel pushes the pump oil rocker arm. Pull down the pump membrane, the spring is compressed, the volume above the pump membrane increases, the pressure decreases, and the wheel pants produce suction, so that the oil outlet valve is closed.

(1) Oil absorption.

The eccentric wheel pushes the outer rocker arm, drives the inner rocker arm to rotate, the tie rod moves downward, the diaphragm spring is compressed, and the lower arch of the pump membrane increases the oil cavity above, forming a certain vacuum degree and absorbing oil.

2) Pump oil. The eccentric wheel does not push the rocker arm, and under the action of the return spring, the diaphragm is bent upward, the volume of the upper cavity is reduced, the pressure increases, and the oil is produced.

3) Oil volume adjustment The oil pressure in the pump chamber is equal to the spring force of the pump membrane, and the pump membrane stops going up.

4) Pump oil pressure: It is determined by the diaphragm spring rate.