What is common rail fuel injection system?

Common rail is a fuel injection system found in modern diesel engines. In common rail systems, the fuel is supplied to the engine under pressure with electronically controlled precision. This provides a level of flexibility which can be exploited for class leading levels of emission control, power and fuel consumption.

Can common rail injectors be serviced?

Being able to fully repair injectors opens up whole new avenues for car repair garages when it comes to saving money on diesel repairs. The repair of Common Rail injectors requires maximum cleanliness. Repair stage 1 only involves replacement of the nozzle.

Is Common Rail Diesel better?

Studies have shown that vehicles with a common rail diesel engine will produce 25% more power than a traditional diesel engine. This means the overall performance of the diesel engine will be improved.

Why is it called a common rail?

The term “common rail” refers to the fact that all of the fuel injectors are supplied by a common fuel rail which is nothing more than a pressure accumulator where the fuel is stored at high pressure. This accumulator supplies multiple fuel injectors with high-pressure fuel.

What is the difference between common rail and direct injection?

Simply, common rail injection sprays fuel into the port before the intake valve. Direct injection sprays fuel after the intake valve, directly into the combustion chamber. Direct injection relies on much higher fuel pressure besides. This pertains to gasoline engines.

What is the function of common rail?

The common rail is a long metal cylinder. It receives the fuel from the pump and distributes it to the injectors under extremely high pressure. The increase in the fuel pressure is a result of the latest engines’ design.

Why do common rail injectors fail?

Water contamination: Another common cause of Common Rail injector failure is contamination from excess water in the fuel. If not stored or handled correctly, water can enter the fuel and will react with the chemicals in it to corrode metal surfaces and reduce lubrication between the moving parts.

Why are common rail injectors so expensive?

In order to move diesel fuel and withstand the high pressure of combustion, diesel injectors need to be much more robust. Naturally, the more complex and beefy design requirements make diesel injectors more expensive. Unlike gasoline injectors operating under lower tolerance.

Is direct injection better than common rail?

A common rail is one of the most important components in a diesel and gasoline direct injection system. The main advantages of the common rail direct fuel injection can be summarized in reduction of exhaust and noise emissions, better fuel efficiency and improved overall engine performance.

What does Mitsubishi did mean?

Acronym DI-D (Direct Injection for Denso) stands for Japanese Mitsubishi diesel engines equipped with Common Rail direct fuel injection system. These are turbocharged inline 4-cylinder engines. The engines are economical, have high efficiency, and meet modern emission standards.

What is Cummins common rail?

The Cummins HD XPI System is a common rail system that provides the highest injection pressure of any other common rail system. The XPI provides industry-leading injection pressure and, as a tailored system, delivers optimal engine performance and improved fuel economy to mid-range applications.

How long do common rail injectors last?

The average lifespan of a diesel fuel injector is around 100,000 miles. A typical fuel injector has two basic parts: the nozzle and the injector body. If either of these components gets clogged or damaged, it will compromise the entire performance of the vehicle.

How do you check DENSO fuel injectors?

Identification of Denso Fuel Injectors Casting Numbers are always located on the sides of the fuel injector body. Depending upon the years manufactured Denso fuel injectors will have a configuration of numbers like this.

What is DENSO injector?

Denso fuel injector is not just another injector but rather a precision instrument and features like welded seals allow DENSO fuel injectors to meet the most rigorous emissions requirements in the world, including those for Super Ultra Low Emissions Vehicles (SULEV) and Partial Zero Emissions Vehicles (PZEV).

How does common rail injector work?

Abstract: In the common rail system, fuel is distributed to the injectors from a high pressure accumulator, called the rail. The rail is fed by a high pressure fuel pump. The pressure in the rail, as well as the start and end of the signal that activates the injector for each cylinder are electronically controlled.

Why do Common Rail injectors fail?

Why are Common Rail injectors so expensive?

Where is the injector code located?

These are generally found on the injector solenoid, or in the case of some Delphi injectors, found on the parts sticker located on the injector body.

How does a common rail pump work?

What is a diesel common rail fuel injection system?

A diesel common rail system is the mainstream fuel injection system for diesel engines. The fuel, which is highly compressed by the fuel pump, is stored in an accumulator called a common rail. Then it is sprayed through the electrically controlled injectors into the combustion chambers.

Why choose Denso diesel common rail systems?

DENSO was able to accomplish this by reducing the workload of the fuel pump. DENSO was the first in the world to commercialize diesel common rail systems in 1995. In 2002, DENSO offered an 1800 bar common rail system, the world’s highest injection pressure at the time. In 2008, DENSO released a 2,000 bar model into the market.

How does the Denso fuel injection system work?

To generate a higher fuel injection pressure, DENSO redesigned components and used new materials. These changes allowed the fuel to atomize into finer droplets, which improved fuel ignition and combustion efficiency, resulting in increased fuel economy and cleaner exhaust emissions.

What is the world’s highest common rail injection pressure?

Denso Corporation announced a new diesel common rail fuel injection system with 2,500 bar pressure capacity—the world’s highest common rail injection pressure, according to Denso.