DIESEL INJECTORS: EVERYTHING THERE IS TO KNOW
1. WHAT ARE DIESEL INJECTORS?
2. HOW DIESEL ENGINES INJECTORS WORK
3. CLEANING INJECTORS: HOW TO PERFORM MAINTENANCE
4. WHEN SHOULD DIESEL INJECTORS BE REPLACED?
5. REPAIRS AND SPARE PARTS FOR REDAT INJECTORS
6. REDAT DIESEL INJECTORS: QUALITY guaranteed to customers
1. WHAT ARE DIESEL INJECTORS?
The injector is one of the components of the fuel system of a combustion engine. Its function is extremely important, namely to introduce the correct quantity of fuel into the combustion chamber. In fact, unlike a simple transfer, the injectors allow the gradual and calibrated passage of the fuel towards the engine. It is essential that the injector is always able to spray the fuel evenly and precisely to ensure efficient combustion and to avoid malfunctions or damage to the engine.
A diesel injector must be able to operate precisely and reliably under conditions of high pressure and temperature. For this reason, maintenance and periodic checks of this mechanical part of the engine are extremely important.
Diesel injectors consist of several elements, including nozzle, plunger, springs, body and solenoid: each of these components is subject to wear over time and it may be necessary to replace worn or damaged components with equally efficient and guaranteed spare parts. REDAT S.p.A. offers its customers a wide range of spare parts suitable for all the main diesel injectors on the market, with a quality that is difficult to distinguish from the original components!
2. HOW DIESEL ENGINES INJECTORS WORK
Diesel injectors are used to introduce the correct quantity of fuel into the engine combustion chamber, through the gradual and calibrated passage of the fuel. In order to understand how they work, first we need to differentiate them according to the type:
a) Mechanical injectors: they were the first injectors to be applied on diesel engines and they work quite simply. Inside the injector there is a spring which keeps the nozzle pin pressed so that the diesel does not come out when the engine is not running. Once the pressure inside the injector body overcomes the force of the spring, the needle rises, starting the injection of nebulised fuel into the combustion chamber.
b) Electrically operated injectors which are in turn divided into:
• Common Rail Injector: this is the most advanced diesel injection system which - thanks to the use of a common rail fed by a high pressure pump - ensures the injectors have a constant internal pressure until the solenoid is energised thus attracting the underlying valve to itself. It is at this point that the injector begins to introduce atomised fuel into the combustion chamber.
• EUI Injector: these pump-injectors (Electronic Unit Injector) are characterised by a large spring directly connected to the camshaft. They do not need a high pressure pump because they are able to generate pressure independently thanks to the internal components such as the plunger, springs and valve.
• HEUI Injector: these are the injectors that are applied in fuel systems that use engine oil to manage the actuation part of the injector (Hydraulic Electronic Unit Injector). Inside the injector, engine oil acts as a hydraulic force that brings the fuel under pressure and causes the injector to gradually atomise it into the combustion chamber.
3. CLEANING INJECTORS: HOW TO PERFORM MAINTENANCE
Over time, impurities inevitably deposit inside the diesel which can cause malfunctions or compromise the performance of the injectors and fuel consumption of the diesel engine. It is therefore very important to clean the injectors to keep the engine running smoothly and to reduce emissions.
To ensure the cleaning and maintenance of diesel injectors, it is good to have the right tools, as well as periodically requesting the intervention of professional technicians.
There are specific products for cleaning diesel injectors, which can be added to the fuel in the tank to help remove the encrusted fuel deposits, dirt and other debris that have built up in the injectors. These products undoubtedly promote better maintaining of the optimal conditions of the injectors, but they cannot work miracles when the components become compromised.
In these cases it may be useful to remove the injectors to proceed with inspection and cleaning of the components. Disassembling, cleaning and reassembling of the injectors are delicate and important operations and it is advisable to periodically use qualified personnel who are able to quickly restore the injector's operation using specific equipment such as ultrasound washing tanks and calibration test benches.
Consult our guide to cleaning Diesel injectors here https://www.redat.com/news/news/cleaning-of-diesel-injectors and contact us without obligation for further information on products and services on 011 979 1111 or by e-mail at [email protected] or [email protected].
4. WHEN SHOULD DIESEL INJECTORS BE REPLACED?
In particular circumstances, however, it may be necessary to replace diesel injectors. This decision depends on several factors, including their age, the number of miles the vehicle has been driven and the use the engine has been subjected to. In these circumstances, it may not be sufficient to clean or repair individual injector components and therefore the entire injector must be replaced with a new spare part.
In order not to be caught unprepared and risk serious damage to the engine, there are some signs that can indicate a potentially faulty injector or one at risk of damage that requires replacement:
- difficulty starting the engine
- black smoke emitted by the vehicle
- reduction in diesel engine power
- excessive fuel consumption while using the vehicle
- unusual noises when driving
Once it has been ascertained that the problem is attributable to the diesel injectors, they can be replaced with new or reconditioned ones. Alternatively it is also possible to request the intervention of qualified personnel who are able to select the individual damaged components to be replaced and then proceed with refurbishment of the injector using test benches for calibration and flow control.
5. REPAIRS AND SPARE PARTS FOR REDAT INJECTORS
REDAT offers a wide range of toolboxes for the correct disassembly and assembly of Diesel injectors. Each box contains specific tools for a precise type of injector.
All tools are designed and tested at our workshop in order to provide our customers with a complete kit of all the tools needed to ensure the quality and efficiency of injector disassembly/reassembly and repair.
In addition to these kits, REDAT also supplies a wide range of tools for the remanufacturing of diesel injectors that you can find in our catalogues: https://www.redat.com/it/news/notizie/riparazione-degli-iniettori-diesel-attrezzature-per-lo-smontaggio-e-rimontaggio
Each catalogue also shows exploded views of the injectors, with the relative spare parts: o-rings, gaskets, valves, plungers, solenoids, bushes, kits, nozzles and everything that can be used for diesel injection, including special tools.
Through our e-commerce (https://www.redat.com/it/38-ricambi-diesel) it is possible to determine the availability and price of each product, as well as view the interactive exploded views and the product sheet of each Diesel injector.
6. REDAT DIESEL INJECTORS: QUALITY guaranteed to customers
REDAT S.p.A. specialises in the production and sale of diesel injector spare parts, injection pumps, remanufactured injectors and injector repair equipment. We have been dealing with the Aftermarket of spare parts for diesel injectors and pumps for over 50 years and thanks to our decennial experience, we are able to satisfy customers by providing them with a quality comparable to original spare parts at competitive prices.
Our products cover most of the injection systems on the market for all sectors – Automotive, Industrial, Marine, Agricultural – and in our aftermarket catalogues you will find all the spare parts of the main brands: Caterpillar - Perkins, Denso, Bosch, Delphi, L’Orange - MTU, Cummins, Unit Injector, Siemens. In this section you can find our injector catalogues: https://www.redat.com/it/51-diesel-cataloghi
If you are interested in L'Orange - MTU injectors, REDAT offers you a wide choice of models and spare parts: https://www.redat.com/it/news/notizie/iniettori-l-orange
If you are looking for Bosch injectors, pumps or spare parts, you can find them in our Bosch catalogue injectors - gaskets - shims or in the dedicated section: https://www.redat.com/it/news/notizie/iniettori-e-pompe-bosch
For anyone interested in Denso brand injectors, REDAT offers many models and spare parts: https://www.redat.com/it/news/notizie/iniettori-denso
If you need Cummins injectors, pumps or spare parts, we can source spare parts and special tools: https://www.redat.com/it/news/notizie/iniettori-e-pompe-cummins
If you are interested in Caterpillar-Perkins injectors and pumps, REDAT offers you a wide choice of spare parts, models and special tools: https://www.redat.com/it/news/notizie/iniettori-e-pompe-caterpillar-perkins