Releases the energy of each drop of oil

Raising the utilization rate of fuel and letting every drop of oil fully release the energy they contain is a realm pursued by technical engineers of gasoline and diesel engines. More than ten years ago, clean diesel engines took the lead in creating high pressure common rail fuel injection technology, which greatly improved the level of fuel combustion. Now on the basis of high pressure common rail technology, fuel injection technology has been developed to improve the combustion process control of diesel engines. To a new height.

Throughout the development history of the entire diesel engine technology, the control of injection accuracy has been the main direction of diesel engine technology improvement. Since the diesel fuel injection system evolved from a mechanically controlled type to an electronically controlled one, the electronic injection system has undergone three revolutions: a positional fuel injection system, a time-based fuel injection system, and a time-pressure fuel injection system. Common rail system.

According to the technical staff of the European-Italian Power Group, the largest manufacturer of diesel powertrains in Asia, electronically controlled high-pressure common rail fuel injection technology can completely separate injection pressure generation and injection from each other, which ensures that the engine is at any Under normal conditions, higher fuel injection pressures can be obtained. In general, this pressure can reach more than 1600 bar. At the same time, the high pressure fuel pump delivers high pressure fuel to the common oil supply pipe and controls the opening time of the high pressure oil pump solenoid valve to the public supply pipe. The fuel pressure in the rails is precisely controlled, which avoids the inconsistence of fuel injection and injection pressure caused by the injection of oil in each cylinder of the traditional diesel engine, which makes the engine run more smoothly; the solenoid valve opening timing of the injector is precisely controlled by the ECU. The duration thus controls the injection advance angle and the amount of fuel injected to ensure optimum power output with minimal fuel consumption.

Based on the first generation of high pressure common rail technology, engineers have also developed a revolutionary multiple injection technology. It can divide the injection process within a single cycle into three processes: pre-spray, main spout and post-spray. The pre-injection can optimize the combustion environment, pre-heating the cylinder temperature in advance, reducing the vibration caused by severe temperature fluctuations, and at the same time destroying the “high-pressure oxygen-enriched” environment generated by nitrogen oxides by consuming some oxygen in advance. By post-injection, the generation of soot and particulate matter can be reduced and the emission level can be increased. It is understood that China's Euroid German green diesel engine, which has taken the lead in reaching the Euro V emission standard, is applying this technology. Up to four injections can be achieved in a single cycle, and the injection gap is only 1/100000 seconds.

According to statistics, the Eurochart green diesel engine adopting the new generation of high pressure common rail technology can save 30% fuel compared to the most advanced direct injection gasoline engine in the industry. The emission is reduced by 25%, while the power output is 50% higher, and the vibration is The emission control also reached the level of the gasoline engine, more in line with the requirements for the comfort of the car, and created the conditions for the promotion of clean diesel engines in the field of cars.

As China's energy demand will continue to grow, the new generation of diesel engine technology will become the first choice for mankind to enter into low-carbon roads with advanced fuel-saving performance, and technology pioneers such as Euro-Europe have achieved a leading edge on this road.

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