The Bosch fuel pump is an essential component of a vehicle’s power system. With their help, fuel is fed into the car engine. This important part is used to connect the fuel tank and the engine, which are at some distance from each other. In previous brands, fuel pumps were not provided, since fuel entered the engine through a gas hose under the influence of gravity.
Varieties of gas pumps
Nowadays, car manufacturers equip their products with mechanical or electric type fuel pumps. The first are used in carburetor type cars. In them, fuel under reduced pressure is in the carburetor. Electric fuel pumps, in contrast, organize the supply of fuel to the engine when exposed to high pressure.
Now fuel pumps do not break often. As a rule, sloppy car drivers are to blame for this.
The main causes of breakdowns:
- clogged fuel filters;
- Riding with empty gas tanks.
Given these reasons, the Bosch fuel pump operates at its full capacity, which means it wears out much faster.
Drivers must comply with the requirements:
- provide at least half filling the gas tank;
- monitor the health of fuel filters.
Mechanical fuel pumps allow fuel from the fuel tank to enter the engine. They do not require high pressure, because they are located close to each other.
Electric fuel pump
Bosch's electric fuel pump uses a higher pressure than mechanical. High pressure allows fuel to be pushed directly into the engine. In previous-generation car models, the fuel pump functioned continuously. In modern gas pumps, its speed is determined only by the requirements of the device. The operation of fuel pumps of this type is controlled by the electronic system of the car. It automatically calculates the throttle position, exhaust composition and the proportion of fuel in the air mixture.
It should be noted that electric fuel pumps work loudly and heat up, since the engine is supplied with fuel under pressure. Therefore, such pumps are located in a gas tank, which makes it possible to achieve cooling of the fuel pump using fuel. Additionally, it can be noted that such an arrangement of the gas pump makes its operation almost silent.
The electric pump is driven by a motor signal. After setting the ignition switch to the on mode, the car computer gives a signal that the gas pump is running and a charge of electricity is supplied to it. The engine, which is located inside the gasoline pump, rotates for some time, raising the pressure in the fuel system. If there is no signal from the computer to start the engine for more than two seconds, the fuel pump is immediately turned off for safety reasons.
It is in the first seconds after the engine starts to work that the driver hears how the pump works. Further, the fuel enters the fuel pump through a special tube, after which it enters the gas filter, which cleans the fuel mixture from contamination. It is for this purpose that the fuel filter needs to be changed periodically. This allows you to achieve effective cleaning of fuel. In the next step, pre-cleaned fuel enters the engine. The fuel pump runs until the engine is turned off.
VAZ pump
For a VAZ-2110 car, the Bosch electric fuel pump is most often used, since it has universal dimensions, is constantly on sale and is not very expensive.
Bosch model for VAZ
For each type of fuel supply system, the manufacturer supplies an independent device.
The performance of the Bosch fuel pump for the VAZ-2110 is 3-3.8 bar.
A significant number of car owners after the failure of a regular gasoline pump change it to a Bosch pump operating in high pressure modes. This parameter of the fuel pump is not able to affect fuel consumption, since the car is equipped with a return line, due to which excess fuel must be returned back to the tank. Additionally, a fuel pressure regulator is provided. Fuel costs may increase when the ramp fails to create optimal pressure. As a result, nozzles are already functioning incorrectly - they do not spray, but simply pour fuel that does not burn.
Design
The design of the Bosch fuel pump is as follows. The main part is the housing, which has fittings for intake and exhaust.
Inside it is an electric DC motor with a roller pump, two valves and two threaded rods for connecting power.
Model Parameters 0580453453
The fuel pump 2110 Bosch can have various parameters. Different models may have different length or diameter of the case. The diameter of the housing can be adjusted by gaskets made of rubber resistant to gasoline. In addition, fuel pump options may have different pressures and chip locations on the terminals. The mesh of the device has the same number of seats, but may have a different shape.
The chip can be converted to a terminal or an option with a VAZ car is installed. The length of the fuel pump determines its functioning in the conditions of a small amount of fuel in the gas tank.
For example, for the Bosch model 0580453453, the length is 105 mm, 0580453449 is 6.5 cm long, 0580453465 is 9.0 cm long.
The fuel pump is located in the gas tank of a car, being immersed in fuel. Inside is an electric motor that drives the pump element. The combination of fuel pump assemblies delivers fuel under high pressure. As a result, the fuel pump is noisy and requires cooling. This problem is solved by immersion of the pump in the fuel tank. Fuel cools the heated equipment and suppresses noise.
The right choice of fuel pump
A fuel pump for the VAZ-2110, purchased on the market, will cost two times cheaper than the same model purchased in a specialized car shop. However, the store is more likely to get a quality part.
The Bosch high-pressure fuel pump is enclosed in a tight, sealed package. The package contains highly refined gasoline. If you smell a gasoline, it means that there is a violation of the tightness of the package, and there is a risk of corrosion damage in the gasoline pump.
Submerged equipment is lubricated and cooled with fuel. If low quality additives are used in the fuel, the electrical mechanisms of the fuel pump can be corroded. If the device is operated dry without the use of additional substances, then the brushes are erased and it overheats.
Many car owners intend to replace the Bosch fuel pump, the characteristics of which deviated from normal values due to prolonged use. Pump pressure should correspond to 7 atmospheres.
Fuel Pump Failures
Let's talk about malfunctions of fuel pumps, methods for their search and elimination.
The least susceptible component of the pump is the motor. The explanation for this is the mode of its operation, which allows for intensive cooling and constant washing. The most common breakdown is a centrifugal slide hydraulic pump. Due to the presence of the smallest solid impurities that appear in the gas tank along with gasoline, the rubbing parts of the supercharger (rotor, stator, rollers) undergo significant wear over time. At the same time, the seals between them become weaker. As a result, operating efficiency is lost and the operating pressure provided by the fuel pump drops. This problem occurs due to the aging of the fuel pump. In the initial period of use, it is practically not detected. It is possible to determine it on a special stand to check the drop in performance and the pressure provided at the outlet fitting. If the fuel pump accumulates defects as a result of aging, the car loses its throttle response and the engine starts to interrupt when it goes through transient conditions. If wear becomes significant, the pressure drop in the supply circuits can reach such a size that the motor cannot start.
Signs of damage
The malfunction of the fuel pump is indicated by an increase in noise during its operation. This indicates the natural wear of the supercharger or severe scoring of its rubbing parts. This trouble often manifests itself in the winter due to the fact that moisture gets into gasoline, which then becomes ice. The resulting ice crystals fall into the millstone of the fuel pump, abrading and tearing the supercharger parts, forming deep cavities on their surface. Often defects also appear in the guide grooves of the supercharger rotor.
The plain bearings included in the electric fuel pump infrequently become unusable before the supercharger parts. The main cause of problems with the normal functioning of the fuel pump is the abrasion of the friction parts of the supercharger.
Repair of gas pumps
In the general case, the VAZ Bosch fuel pump, along with any other, is not recommended to be repaired. In the event of a malfunction, they usually need to be replaced. But in real life, if it is possible to skillfully open the rolling of the pump casing from aluminum, the subsequent steps to repair and restore the fuel pump are not a big problem.
When the Bosch high-pressure fuel pump is opened and completely disassembled, all components must be carefully inspected. Particular attention should be paid to the hydraulic pump. If it is maintainable, then you can decide to repair the fuel pump.
Be sure to replace the brushes in the electric motor. They can be taken from a similar gasoline pump. You also need to grind the collector. If damage to the motor armature winding is detected, it must be rewound. When rewinding, you need to pay special attention to preserving the fuel channels available in the anchor grooves. Centrifugal supercharger is collapsible. It is necessary to grind the damaged surfaces of the rubbing parts of the supercharger assembly.
The grain of the grinding stone should not exceed 50 microns. Slight wear of the rotor slots is not essential for the operation of the engine, and they can not be processed. Just when the reassembly will be carried out, the rotor of the vane pump is placed in its stator by the other side. If there are large scoring of the rollers, they must be changed using domestic bearings as donors. If it is not possible to change the rollers, the ends must be polished on a magnetic table in a screwed mandrel.
There is one more detail, often during severe frosts leading to the breakdown of a completely new fuel pump. This is a coupling fork. This component is considered non-replaceable. But even the coupling fork can be replaced. This requires complex turning repair work with the pump motor armature.
It is necessary with maximum care and accuracy, with a special cutter, to make a groove in the body of the fork from plastic and to tightly fit a new groove in the resulting groove.
The updated fork is fixed with dental cement or with micro screws. A combination of these two mounting methods is also possible. Do not grind the plastic replacement fork. It is better if it is aluminum or bronze.
A well-made repair of the inner filling can go down the drain if the outer cup of the electric fuel pump is not rolled up reliably. Usually, it is only possible to open and roll the glass back once. And then, it requires the highest qualification in carrying out these operations. The opening of the glass is preferably carried out manually, for example, using a blunt screwdriver. Since under the rolling is a rubber gasket having the shape of a flagellum with a circular cross section. We must strive to ensure that it does not suffer. Reverse rolling can be carried out by the break-in method using a lathe. It is possible to fix the fuel pump on a lathe, and also to achieve pressing the glass against the body, by making special equipment.
Repair kit
Repair repair will help the Bosch fuel pump repair kit, consisting of rubber products.
Everything described above shows that your desire alone is not enough in order for the fuel pump to be properly repaired. Requires the presence of high professionalism of the master and special equipment. This repair technique is only feasible on equipped service stations. In addition, large stations have a large number of used parts that can be used. Under these conditions, two-thirds of the total number of failed fuel pumps can be repaired.
Real life proves that after restoration, fuel pumps are able to work for quite some time.
Reviews
Car owners who have used the Bosch fuel pump respond mostly favorably. Among the advantages of it is called low price, reliability, durability. The disadvantages are noisy work.