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Common Rail Adapters Between Past And Present


Common rail technology has advanced by light years over the last couple of decades. The black days of sulfur-laden, hotter diesel smoke spewing out of piles of semi-trucks are gone.

Diesel engines rely on simple and effective common rail adapters, which help the method of distributing fuel to the engine’s combustion chambers. The fuel of common rail adapters and injectors in early diesel was entirely mechanical.

Traditional Common Rail Adapters

Although it is precisely machined and robustly build, the operating pressure of the common rail adapters system was not high enough to make a consistent, well-defined spray pattern to the fuel.

In these old indirect common rail adapters, the pump had to do double duty. It was not only supposed to provide fuel system pressure, but also act as a timing and delivery device.

Their initial common rail adapters relied on simple mechanical inputs such as the fuel pump revolutions per minute and the throttle position of the fuel delivery gauge.

To make matters worse, it was necessary to inject low-pressure fuel into a pre-chamber to ensure proper charge dissolution before it could penetrate into the main common rail adapter to do its job.

If the engine is cold and the outside air is cold, things really go bad. Although the engine has glow plugs to help it operate, it may take a long time to run before the heat is absorbed enough to allow for a smooth start.

Why this massive multi-stage process? And why so much trouble with cold temperatures?

The main reason is the nature of the common rail adapters’ operation and the limitations of early diesel technology. Unlike gasoline engines, diesel do not have spark plugs to ignite the fuel mixture.

Diesel engines rely on the heat generated by the massive pressure of air in the cylinders to ignite the fuel when it is sprayed into the combustion chamber.

When it is cold, it needs the help of glow plugs to boost the heating process. Since there is no spark to start the combustion, the fuel must be introduced into heat as a very fine mist in order to ignite properly.

Modern Common Rail Adapters

Modern diesel vehicles have earned their resurgance from popularity to advances in fuel delivery and engine management systems that allow engines to return equivalent power, while at the same time producing superior fuel economy.

It is the high-pressure fuel rail and the common rail adapters and injectors that make this big difference in the modern common rail system. The fuel pump charges fuel at a pressure of up to 25,000 psi.

Unlike indirect injection pumps, modern common rail adapters do not participate in the discharge of fuel. Under the control of the onboard computer, the amount of fuel and pressure builds up in the rail independently of engine speed and load.

Each common rail adapter and the fuel injector are mounted directly above the piston inside the cylinder head and are connected to the fuel rail by solid steel lines capable of withstanding high pressure.

The high pressure allows for very fine common rail adapters that completely atomize the fuel and eliminate the need for a pre-chamber.

The injector is powered by a stack of piezoelectric crystal chips that move the jet needle in small increments that allow the fuel to be sprayed.

Piezo crystals work by expanding rapidly when an electrical charge is applied to them. As with a common rail adapter, the engine is controlled by the engine injector and can be fired in rapid succession several times during the injection cycle.

With this precise control of common rail adapters and injector firing, small and increased amounts of fuel delivery can be adjusted over the course of the power path to promote complete and accurate combustion.

In addition to controlling the time, the short-duration high-pressure injection and common rail adapters allow for a finer and better spray pattern that also supports a better and more complete atomizing and burning process.

Through these developments and improvements of modern common rail adapters, the modern common direct injection diesel engine is quieter, more fuel efficient, cleaner, and more powerful than the mechanical indirect injection units replaced.

Common Rail Adapters Products by Maktest

Maktest has manufactured many high-quality common rail adapters in compliance with the most important international quality standards. Here are some of the best common rail adapters by Maktest:



Regular and heavy-duty injectors can both use the TK1029. The TK1029 may be used to test Common rail continuously. It has improved filtration, a bigger and different design test oil tank, a cooling algorithm, a motor drive, and a choice of master pumps. It was made to withstand continuous testing.

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This common rail injector tester offers several modern and advanced features, as well as a quick measuring technique. The temperature may be controlled, and the TK1026 Injectester CRI can offer the most recent information on repair procedures. It contains the most recent control software, together with an instruction manual and a troubleshooting handbook.

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Prior to conducting a comprehensive test on the TK1026 injectester CRb, the TK1022 provides preliminary common rail injector test benches. The hand-operated, straightforward design of this apparatus makes it ideal for doing efficient yet accurate common rail testing. The new touch panel, which shows real-time pressure on a graph screen, is an added function.

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PT2012 CRe


This mechanical test bench has undergone extensive usage and testing. The PT2012.CRe distinguishes itself from its rivals and demonstrates why it is worthwhile to invest in by having the ability to test Common Rail Pumps. By precisely managing pressure, flow, and speed, it also evaluates common rail pumps.

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With each new generation of common rail systems, testing common rail pumps becomes increasingly challenging. Newer generations of Common Rail pumps may be tested using this device (TK1035). These pumps now need more precise pressure controls, precision metering, and more accurate speed control.

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