Novel high-pressure fuel oil system for internal combustion engine

Abstract

The invention relates to a novel high-pressure fuel oil system for an internal combustion engine, which is mainly characterized in that, a) high-pressure fuel oil in a pressure accumulator (3) is sent to a fuel oil distributor (8) in a timing and quantitative manner under the control of a high-pressure fuel oil on-off electromagnetic valve (7); b) the fuel oil distributor (8) is distributed after the high-pressure fuel oil on-off electromagnetic valve (7) and before a fuel oil injector (12); and c) an ECU (13) in the system can realize the control of fuel oil injection pressure and the fuel oil injection time, and the fuel oil injector (12) in the system adopts a traditional mechanical fuel oil injector. The high-pressure fuel oil system can realize the control of the fuel oil injection time and the fuel oil injection amount of each cylinder and lead each cylinder to realize multiple fuel oil injection in one working cycle by using the ECU (13) to control the high-pressure fuel oil on-off electromagnetic valve (7). The high-pressure fuel oil system can realize the free control of the fuel oil injection pressure and the fuel oil injection time, realize the multiple fuel oil injection in one working cycle, meet the requirements of the high emission standard of the internal combustion engine and further have the advantages of novel structure, simpleness, reliable working, convenient maintenance, low cost and the like.

Description

Technical field: [0001] The invention belongs to a high-pressure fuel system for an internal combustion engine, and is particularly suitable for an electronically controlled high-pressure fuel system for a diesel engine. technical background: [0002] Energy saving and emission reduction are the two driving forces for the development of today's internal combustion engine technology. Gasoline engines and diesel engines have different research priorities due to their different combustion methods. Gasoline engines use three-way catalytic technology to control emissions to a very low value, so the focus of research is on energy saving; research on diesel engines focuses on how to reduce emissions. Developed countries in the world began to implement strict emission regulations on internal combustion engines in the early 1990s, and they became more and more stringent as time went on. At present, there are mainly three major emission standards in the world: the United States, Euro...

AI Technical Summary

Problems solved by technology

However, it can be seen that the disadvantage of this patent is that the main injection pressure source directly reaches the injector of the corresponding cylinder through the central distributor, so the pressure cannot be freely controlled; at the same time, there is a corresponding electromagnetic valve at the inlet of each injector. The valve is responsible for selecting two different high-pressure sources for injector injection, and the structure is complex

It can be seen that the disadvantage of this patent is that the coordinated control of the first solenoid valve and the second solenoid valve can meet the requirements for fuel injection timing and fuel injection volume, which is difficult to control and poor in reliability.

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