Natural wear and tear of respective components proportional to distanceįuel contamination in the fuel system (corrosion particles, dust, small metallic shards, water, and other unwanted liquids) At the same time, they can use the same service life. In this way, we help customers from all over Europe save the cost of purchasing new injectors, often by tens of percent. We at Autonorm are able to repair / overhaul them thanks to hand-developed technologies and procedures. The only disadvantage is that piezo injectors are currently largely unrepairable, as their manufacturers do not supply the data and components needed for overhaul. The advantage is also the saving of approximately 75% of moving masses on the nozzle needle. Thanks to this, the gaps between the individual injections can be shortened and thus the injection process can be made more efficient. Piezoelectrically operated injectors have about four times higher switching speeds than electromagnetically operated injectors. Their main advantage is the short activation time (approx. Piezoelectric injectors enable more precise dosing of the amount of fuel injected and better fuel atomization in the combustion chamber of the engine. This results in reduced fuel consumption, quieter engine operation and a lower content of hazardous substances in the exhaust gases. With new generation CR systems, it is possible to make several injections during a single engine duty cycle. The fuel in the tank is constantly under high pressure, so it is possible to adjust the injection by sending electrical impulses to the injectors. This makes the injection system more flexible and adaptable to the engine than traditional bag-driven systems. They allow the division of functions to create high pressure and perform fuel injection. Common Rail systems use two variants of injectors according to the cell that moves the nozzle: electromagnetic and piezoelectric.Įlectromagnetic (solenoid) injectors are the most widely used type of high-pressure fuel supply for diesel engines. Unfortunately, any contamination of diesel can contribute to their damage. These components are responsible for accurate fuel metering into the cylinders. Proper common rail operation ensures perfect operation of the rail-mounted injectors. Well-known manufacturers of common rail injection systems include Bosch, Siemens, Delphi, Denso and Zexel. This is possible thanks to the high injection pressures, which exceed 2,000 bar (200 MPa), as well as the possibility to adapt the injection pressure to the current operating state. The Common Rail injection system allows high flexibility to adapt the fuel injection to the engine. Their task is to dose / inject the fuel mixture from the injection pump into the combustion chamber of the individual cylinders under high pressure, in the best possible combustible state (= the smallest possible particles). As of 2010 (and Euro 5 emission standards), you will no longer find another injection system in passenger diesel cars.Ĭommon Rail injectors are an integral part of the high pressure system. Compared to older technologies, Common Rail systems have significantly lower carbon emissions, quieter and quieter operation, higher efficiency and lower fuel consumption. In a very short time, other vehicle manufacturers began to use it. Common Rail injectors - what are they for and how to know that they do not workĬommon Rail (CR) technology conquered the world as early as 1997, when it debuted in Alfa Romeo car engines.
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