Petrol injectors

Our offer includes cleaning and performance testing of petrol injectors. We deal with both designs used in indirect injection (MPI/PFI) and direct injection (GDI) engines. We use state-of-the-art equipment and technology to clean and test injectors such as dedicated equipment with an injector backwash function, software that simulates operation under different engine load conditions and an accurate measuring system that measures injected fuel doses.

If you have a problem with defective petrol injector, come to us - we will perform a comprehensive cleaning, check the quality of the spray and the correct operating parameters.

Genesis and application.

The fuel supply of petrol engines has undergone considerable evolution over recent decades. Since the early days of this type of engine, engineers have sought to improve the efficiency of their power supply in order to achieve greater efficiency, power and reduced fuel consumption. From simple carburettors to mechanical and electronic injection systems to advanced direct injection technologyEach solution had its unique advantages and disadvantages. Current direct injection (GDI) technologies represent the pinnacle of precision and efficiency, although developments in this field are still ongoing, striving for even greater efficiency and eco-friendliness. Advanced injection systems are able to better control the combustion process, leading to a significant reduction in harmful emissions. As a result, the cars are more environmentally friendly and meet stricter emission standards. 

A landmark in the development of fuel injection technology was the introduction of fuel injection systems in the 1960s. Bosch then presented the D-Jetronic, the first electronic fuel injection system, which allowed more precise fuel metering through the use of sensors and an electronic controller. The technology was gradually improved over the following decades, with more advanced systems appearing in the 1980s, such as the L-Jetronic, which was the first to use an air mass flow meter. 

There were systems on the market with only one central injector The first injector replaced the carburettor (hence the name single-point injection), but this was relatively quickly replaced by systems in which fuel is supplied to each cylinder via a separate injector (so-called multi-point injection). The need for precise engine control and reduced fuel consumption resulted in the development of sequential injector control, i.e. the individual opening and closing of each injector. This was followed by the development of series-produced petrol direct injection systems, further reducing fuel consumption and contributing to lower exhaust emissions. However, impurities in the fuel or intensive use can lead to a situation where it becomes necessary to repair of petrol injectors through thorough cleaning.

Construction and principle of operation.

The injection system of a petrol engine consists of several basic components:

1. Fuel tank
2. Fuel pump
3. Fuel filter
4. High pressure pump (in direct injection systems)
5. Fuel pressure control valve
6. Fuel rail
7. Fuel pressure and temperature sensor(s)
8. Fuel injectors
9. Electronic engine controller and a range of sensors and actuators 

The petrol injector contains the following components:

1. Injector housing
2. Control valve (solenoid or piezo element)
3. Needle
4. Nozzle
5. Inlet filter and seals

Petrol injectors are the final link in the injection system and are responsible for the precise delivery of the correct dose of fuel to the engine cylinders. Fuel drawn in from the tank is pumped under pressure into the system and then purified by passing through a filter. In indirect injection systems, the fuel goes into the reservoir and from there to the injectors. In direct injection systems, there is a pump between the fuel filter and the accumulator (rail), which generates high fuel pressure. Fuel injection occurs when the injector is opened, which is achieved by energising the actuator, which is usually the coil. In some solutions, particularly in direct injection systems, there are piezo injectors. The process starts with the engine's electronic control unit (ECU), which decides on the amount of fuel to be injected into the engine based on signals from various sensors (such as the mass airflow sensor, crankshaft position sensor, engine temperature sensor, etc.). The ECU sends an electrical pulse to the coil of the injector solenoid, which generates an electromagnetic field. The magnetic field attracts the core of the electromagnet, which is connected to the needle (needle valve). The magnetic force overcomes the resistance of the spring, which normally holds the firing pin in the closed position, and lifts it, opening the injector. When the needle is raised, the flow path for the fuel opens. Fuel under high pressure flows through the injector nozzle and is sprayed into the combustion chamber or intake manifold. Injector nozzle is designed to create a fine mist of fuel for better mixing with the air and more efficient combustion. When the electrical pulse sent by the ECU ends, the current stops flowing through the solenoid. The magnetic field disappears and a spring returns the needle to the closed position. In this way, the injector closes, interrupting the flow of fuel.

The main task of the injector is to deliver a properly measured dose of fuel to the engine cylinder. A portion of the fuel must be accurately atomised and fragmented to ensure proper evaporation, mixing with air and combustion. To achieve this, the injector must be precisely and quickly controlled and supplied with fuel at a sufficiently high pressure. 

Petrol injector reconditioning and repair - what does it involve?

Unfortunately, regeneration of a petrol injector is not possible in the full sense of the word. This is mainly due to their design - most of them cannot be taken apart without irreparable damage, so access to the components is impossible. For this reason there are no regeneration proceduresand manufacturers do not supply spare parts.

For most repair of petrol injectors consists of cleaning them and checking the fuel dosage and atomisation quality.

The injectors removed from the engine are subjected to an initial visual assessment. At this stage, the external condition of the injectors is checked and any visible damage is looked for. The injectors are placed in an ultrasonic bath, which effectively removes accumulated dirt and deposits. The process uses ultrasonic waves to generate microscopic bubbles, which implode to strip contaminants from the surface of the injector. We use injector test benches are also equipped with a backwash function to remove sediment and deposits from inside the injector.

After cleaning, the injectors are tested on special test benches that simulate the operating conditions in the engine. Here, leakage, fuel dosage and fuel atomisation quality are checked. Tests are carried out at various pressures to ensure that the injector is operating correctly throughout its operating range.

If the injector is not damaged or worn mechanically and is electrically efficient, its cleaning will bring satisfactory results and will allow it to be used for a long time.

Professional repair of petrol injectors w Turbo-Tec is a safe and effective alternative to replacement.

Causes and types of damage.

Defective petrol injector manifests itself most often as:

1. Uneven engine running
2. Loss of engine performance
3. Increased fuel consumption
4. Misfire
5. Check engine light on

The most common causes of petrol injector failure:

1. Contamination, poor fuel quality
2. Sediment accumulation
3. Overheating
4. Mechanical wear
5. Problems with eclectic components

If you notice the above symptoms, it is worth checking the condition of the injectors. Petrol injector regeneration through cleaning and testing is the most effective way to restore its efficiency.

Turbo-Tec - your partner for petrol injectors

W Turbo-Tec We combine knowledge, experience and modern technology. This enables us to effectively diagnose and clean even the most challenging systems. Our procedures include everything from ultrasonic cleaning to backwashing to precision fuel atomisation tests.

Make use of our services - petrol injector regeneration at Turbo-Tec is a guarantee of precision, safety and reliability.

Models and parts available

We currently stock one of the more interesting A2C6064072777 VDO / Siemens petrol injector models for use in BMW models.

Other alternative injector numbers: 13537589048-09, 13537565137-02, 13537589048-07, 13537565137-03, 13537589048, 13537589048-11, 7584681, 13537584681, 7589048, A2C60640727, 13537565137, A2C6064072777 ,13534548853, 13537589048-03, A2C9521220280, 7565137, A2C59517061.

If you are interested - please feel free to contact us.