The world s leading high pressure common rail diesel engine

At present, there are three major companies in the world that develop and produce high-pressure common rail systems for diesel engines, Denso in Japan, Bosch in Germany and Ford in the United States. If the single pump diesel injection technology is compared to the revolution of diesel technology, then the common rail can be called a rebellion, because it deviates from the traditional diesel system and approximates the sequential gasoline injection system. Common rail systems open up new ways to reduce emissions and noise in diesel engines.

Due to its strong technical potential, manufacturers today are already setting their sights on the third generation of common rail systems – piezo common rail systems, in which piezo actuators replace solenoid valves and thus achieve more precise injection control. Without the return pipe, it is simpler in structure. The pressure is elastically adjusted from 200 to 2000 Pa.

The minimum injection amount can be controlled, which reduces the smoke and NOx emissions.

The increasingly serious energy crisis has become the focus of attention in the internal combustion engine industry around the world, and diesel engines are more and more favored by users. Compared with gasoline engines, diesel engines have many advantages: they can reduce CO2 emissions by 20% to 25%, accelerate at lower speeds, and have an average fuel consumption of 25% to 30% less, which can provide more driving pleasure.

Therefore, some people have boldly carried out the development trend of diesel engines in global automobile production, and divided the proportion of diesel engines in world automobile production by region. However, compared with gasoline engines, emission control of diesel engines is another difficulty. In order to meet the emission standards, the advanced fuel injection system ——— high-pressure common rail technology of diesel engines have become the focus of attention of industry insiders.

A few years ago, high-pressure common rail technology was dominated by foreign capital, and now this situation has been broken.

The three major companies are developing and producing high-pressure common rail systems for diesel engines, including Denso of Japan, Bosch of Germany and Ford of the United States.

The principle of high-pressure common rail diesel engine refers to a kind of oil supply machine that completely separates the generation of injection pressure and the injection process from each other in a closed-loop system composed of a high-pressure oil pump, a pressure sensor and an electronic control unit (ECU). By separating fuel pressure generation from fuel injection, the common rail system opens up new ways to reduce emissions and noise in diesel engines.

It is a high-pressure oil pump to deliver high-pressure fuel to the public fuel supply pipe (rail), through the public oil supply pipe to achieve precise control of the oil pressure, so that the pressure of the high-pressure oil pipe (pressure) has nothing to do with the speed of the engine, can greatly reduce the degree of diesel engine fuel supply pressure with the engine speed.

Summary. Dear dear, it's a pleasure to answer your <>

The advantages of electronically controlled high-pressure common rail diesel engine are; 1.Good fuel economy, reduced noise, and improved exhaust emission standards. 2.

The electronically controlled diesel engine runs smoothly. 3.The electronically controlled diesel engine works reliably.

In the electronically controlled diesel engine control system, the ECM monitors whether the operating parameters input by the sensor are correct at any time. 4.The system structure is easy to transplant, and the adaptation range is wide and <>

Advantages of electronically controlled high-pressure common rail diesel engine.

Dear dear, it's a pleasure to answer your <>

The advantages of electronically controlled high-pressure common rail diesel engine are; 1.Good fuel economy, reduced noise, and improved exhaust emission standards. 2.

The electronically controlled diesel engine runs smoothly. 3.The electronically controlled diesel engine works reliably.

In the electronically controlled diesel engine control system, the ECM monitors whether the operating parameters input by the sensor are correct at any time. 4.The system structure is easy to transplant, and the adaptation range is wide and <>

<> Qinqin Data development: Electronically controlled high-pressure common rail uses diesel engine common rail electronically controlled fuel injection technology, which is a relatively successful new technology to control pollution emissions. The use and maintenance method of high-pressure common rail diesel engine:

1. Carefully check the condition of each sensor connector before starting. If it is loose, it should be connected in time to ensure that there is no poor contact and short circuit of the vehicle wiring harness. 2. Check whether the radiator is in good condition, and ensure that the oil level of the fuel tank must be read to a certain fault**, which is the fault of the B141 evaporator surface temperature sensor circuit.

3. The system characteristics of high-pressure common rail diesel vehicles require the use of high-quality and viscous diesel oil, and avoid adding inferior oil mixed with impurities<>

Hello dear and happy to serve you: the advantages of electronically controlled high-pressure common rail diesel engine; 1.Good fuel economy, reduced noise, and improved exhaust emission standards The high-pressure diesel injection system has high injection pressure, and the injection process is divided into pre-injection, main injection and secondary injection to make the fuel atomized well and fully combusted, which can reduce combustion noise and fuel consumption, and can reduce NOx emissions.

2.The electronically controlled diesel engine runs smoothly in the high-pressure common rail system, and its fuel injection pressure has nothing to do with the speed, but only depends on the fuel pressure in the accumulator, and the fuel injection pressure is monitored by the pressure sensor to keep the pressure consistent. It solves the problem of excessive pressure difference between high and low speed of traditional fuel injection pumps, and also solves the problem of unstable operation of diesel oil engine.

3.Electronically controlled diesel engine works reliably In the electronically controlled diesel engine control system, ECM monitors whether the working parameters input by the sensor are correct at any time. When certain parameters exceed the set value, the ECM immediately alarms, and at the same time controls the actuator to adjust and correct until the engine is working properly.

If the ECM detects that some important parameters are incorrect and will affect the reliability of the diesel engine, the ECM will make the fuel injection high-speed solenoid valve cut off the fuel path, so that the engine runs into self-protection to avoid losses. 4.With fault diagnosis function, reduce the maintenance workload ECM monitors the sensors, actuators and connection lines in the engine electronic control system, and when the sensor and its connection circuit fail, ECM will confirm the fault and store it in the form of fault code, which brings convenience to troubleshooting.

5.The speed regulation of the diesel engine can be accurately controlled In the electronically controlled diesel engine injection system, the mechanical centrifugal governor is replaced by the electronic governor, and the amount of fuel injection is only related to the load and speed of the engine, and has nothing to do with the throttle adjustment, so the speed control accuracy of the electronically controlled diesel engine is high. 6.

Fast response speed, more accurate control In the high-pressure common rail injection system, the piezoelectric injector is adopted, which has a fast response speed, solves the problem of time lag of the solenoid valve, and makes the fuel injection fast, the oil cut-off time is accurate, and the control accuracy is high. 7.Electronically controlled diesel engine is widely used in passenger cars, light buses, large city buses and medium and heavy trucks due to the use of direct injection, turbocharging, and four valves per cylinder, which greatly reduces the emission of particulate matter.

Summary. Hello dear, glad to answer for you! <>

The advantage of electronically controlled high-pressure common rail diesel engine is that the fuel injection pressure in the high-pressure common rail system can be flexibly adjusted, and the optimal required fuel injection pressure can be determined for different working conditions, so as to improve the comprehensive performance of the diesel engine. <>

The fuel injection timing can be controlled independently and flexibly, and at higher injection pressure (120MPa 200MPa), NOx and PM can be controlled together to a small value to meet the emission requirements. <>

<> can flexibly control the change of fuel injection volume to achieve the ideal injection law, and it is easy to realize pre-injection and multiple injection, which can not only reduce the NOX of the diesel engine, but also ensure excellent power and economy. <>

Advantages of electronically controlled high-pressure common rail diesel engine.

Hello dear, glad to answer for you! <>

The advantage of electronically controlled high-pressure common rail diesel engine is that the fuel injection pressure in the high-pressure common rail system can be flexibly adjusted, and the optimal required fuel injection pressure can be determined for different working conditions, so as to improve the comprehensive performance of the diesel engine. <>

The fuel injection timing can be controlled independently and flexibly, and at higher injection pressure (120MPa 200MPa), NOx and PM can be controlled together to a small value to meet the emission requirements. <>

<> can flexibly control the change of fuel injection volume to achieve the ideal injection law, and it is easy to realize pre-injection and multiple injection, which can not only reduce the NOX of the diesel engine, but also ensure excellent power and economy. <>

<> kiss <>

Related Expansion: A diesel engine is an engine that burns diesel fuel to release energy. It was invented in 1892 by the German inventor Rudolf Diesel, and in honor of the inventor, diesel fuel is represented by his surname Diesel, and diesel engines are also known as Diesel engines.

<> bulky, noisy, and spewing black smoke make many people have a bad intuitive impression of diesel engines, and after years of research and application of new technologies, the status quo of modern diesel engines has been incomparable. Modern diesel engines generally adopt technologies such as electronically controlled injection, common rail, turbocharging and intercooling, and have made major breakthroughs in weight, noise and smoke, reaching the level of gasoline engines. In terms of electronically controlled injection, the main difference between diesel engine and gasoline engine is that the electronically controlled injection system of gasoline engine only controls the air-fuel ratio (the ratio of gasoline to air), while the electronically controlled injection system of diesel engine adjusts the load by controlling the injection time.

The injectors of traditional diesel engines work passively, that is, when the oil pump is under pressure, it will inject diesel fuel into the cylinder due to pressure. This fuel injection process is completely controlled by the oil pump. Naturally, it is not possible to achieve computer-controlled fuel injection, which is in some ways similar to that of gasoline engines with carburetors, because they do not require a suffocated car to achieve precise control of the amount of fuel injected.

The injector used by TDI is controlled by a solenoid valve, and the injection timing and injection amount can be accurately controlled by the solenoid valve according to the instructions issued by the ECU, which is like the electric injection technology of a gasoline engine.

Not only that, but the TDI engine can also achieve closed-loop control of diesel engines, which was not possible in previous diesel engines. Sensing components such as oxygen sensors feed back the exhaust gas to the ECU, so that the hood source can judge the combustion status according to the exhaust gas, and then further adjust the fuel supply concentration to achieve full combustion of the mixture.

This precise control of the fuel supply, combined with the injection pressure generated by the electronic pump at high pressure, allows a powerful vortex to be generated in the engine cylinder that allows the mist diesel to mix well with the air, which minimizes the chance of deflagration. The adoption of this integrated technology fundamentally greatly reduces the vibration and noise of diesel engines.

The durability of high-pressure common rail diesel engines is very good, and many trucks and semi-trailers use this engine.

The efficiency of diesel engines is higher than that of gasoline engines, and the working principle of diesel engines is also different from that of gasoline engines.

Ordinary gasoline engines need spark plugs to ignite the combustible mixture, and the combustible mixture can be burned to do work.

That diesel engine uses compression ignition, which does not require a spark plug to ignite the combustible mixture. When the engine is in the compression stroke, the piston runs upwards to compress the combustible mixture, so that the pressure and temperature of the combustible mixture rise. Diesel engines rely on pressure and high luggage socks temperature to ignite combustible mixtures.

The common diesel engine on the semi-trailer is the turbocharged six-cylinder diesel engine, and the general van is equipped with a turbocharged four-cylinder diesel engine.

Turbocharging technology was actually applied to diesel engines earlier than gasoline engines. Turbocharging technology can solve the problem of insufficient air intake of diesel engines.

Most diesel engines use high-pressure common rail technology, which has relatively good durability.

1. The composition is different.

High-pressure common rail diesel engine refers to a kind of oil supply machine that completely separates the generation of injection pressure and the injection process from each other in a closed-loop system composed of a high-pressure oil pump, a pressure sensor and an electronic control unit (ECU).

The EFI diesel engine is a diesel engine that electronically controls fuel injection and emissions, that is, the EFI diesel engine.

2. The operating principle is different.

The high-pressure common rail diesel engine is a high-pressure oil pump that transports high-pressure fuel to the public fuel supply pipe (rail), and the oil pressure in the public oil supply pipe is accurately controlled, so that the pressure of the high-pressure oil pipe has nothing to do with the speed of the engine, and the degree of change of the fuel supply pressure of the diesel engine with the engine speed can be greatly reduced.

The injection system of an EFI diesel engine consists of three parts: sensor, ECU (computer) and actuator. Its task is to electronically control the fuel injection system, and realize the real-time control of the fuel injection volume and the fuel injection timing with the operating conditions.

3. Development is different.

After the development of the diesel fuel injection system from the mechanical control system to the electronic control system, the electronic injection system has undergone three changes, namely the position fuel injection system, the time type fuel injection system and the time pressure fuel injection system (common rail system).

The EFI diesel engine uses sensors such as speed, accelerator pedal position, fuel injection time, intake temperature, intake pressure, fuel temperature, cooling water temperature, etc., to input the real-time detected parameters into the computer (ECU) at the same time, compare them with the stored set parameter values or parameter maps (MAP diagrams), and send the instructions to the actuator according to the best value or the calculated target value after processing and calculation.