Introduction of high pressure common rail system for diesel engines

8 standard tips for the use of the generator set after starting, many friends think that the diesel generator set does not need to take care of it after the normal start, in fact, this is not right, because the diesel generator set is more likely to break down after the start. Therefore, at this time, it should also be regularly checked to ensure that the generator set is working normally. Let's take a look at the 8 standard tips after starting: 1. Put the voltage regulation selector switch on the switch screen in the manual position; 2. Turn on the fuel switch, and fix the fuel control handle at the throttle position of about 700 rpm at the same time; 3. Use the high-pressure oil pump switch handle to continuously pump oil until there is pump oil resistance and the injector makes a crisp squeak; 4. Put the handle of the oil pump switch on the working position, and push the pressure reducing valve to the pressure reducing position; 5. Shake the handle by hand or press the electricity....

High-pressure common rail EFI technology refers to a fuel supply method in which the generation of injection pressure and the injection process are completely separated from each other in a closed-loop system composed of a high-pressure oil pump, a pressure sensor and an electronic control unit (ECU). It is a high-pressure oil pump to transport high-pressure fuel to the public oil supply pipe, through the public oil supply pipe oil pressure to achieve accurate control, so that the pressure of the high-pressure oil pipe 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.

The diesel common rail fuel supply system is a closed-loop control system composed of electronic control unit ECU, fuel flow metering unit (including fuel flow regulation solenoid valve), and common rail pressure sensor. According to the operating conditions of the engine, the electronic control unit will collect various sensor information analysis and calculation, timely and accurately control the work of the high-pressure oil pump, by adjusting the flow metering valve, so that the high-pressure fuel in the common rail pipe reaches the required pressure value, and maintain the pressure required by the corresponding working conditions set by the program, so as to realize the adjustable control of the injection pressure, and at the same time, the electronic control unit sends a pulse command to the electro-hydraulic control of the electronic injector, and accurately controls the injector through the width of the pulse, so that the high-pressure fuel in the common rail is the best injection time. The most appropriate injection amount, the most suitable injection rate and good spray condition are injected into the engine combustion chamber to ensure that the engine works in the best performance state under any working conditions. Diesel common rail fuel supply system.

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 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.

Hello, dear, I am glad to answer for you: how to choose a diesel model for a high-pressure common rail diesel engine, there are no special requirements for diesel, just use ordinary zero diesel. According to the freezing point, the selection is mainly based on the minimum temperature of the use environment.

Since the cold filter point is higher than the freezing point, diesel fuel is generally selected according to the ambient temperature reduction of a few degrees. Nowadays, diesel fuel is mainly based on the freezing point of diesel to determine the number: there are six kinds of 5 and -50.

Generally speaking, 5 diesel is suitable for use when the temperature is above 8; 0 Diesel is suitable for use when the temperature is 8 to 4 years with dust; -10 Diesel is suitable for use when the temperature is between 4 and -5; -20 diesel is suitable for use when the temperature is between -5 and -14; -35 diesel is suitable for use when the temperature is between -14 and -29; -50 Diesel is suitable for use when air temperatures are between -29 and -44 or below.

The requirements for diesel fuel for high-pressure common rail engines mainly include the following points:1Viscosity:

The viscosity of diesel fuel needs to meet the design requirements of the engine to ensure that the fuel can flow through the high-pressure common rail system normally; 2.Sulfur content: The sulfur content of the high-pressure common rail engine has high requirements for the diesel fuel, which is generally less than 50ppm, so as to avoid the damage of sulfur to the engine system; 3.

Cleanliness: Diesel oil needs to be strictly filtered and refined to ensure that it is free of impurities and pollutants to ensure the normal operation of the engine; 4.Combustion performance:

The combustion performance of diesel needs to be excellent to ensure the combustion efficiency and environmental performance of the engine; 5.Energy value: The energy value of diesel fuel needs to meet the engine design requirements to ensure the power output of the engine and the economy of fuel consumption.