Double-ECU high-pressure common rail fuel control system and method for high-strength diesel engine

Abstract

The invention discloses a double-ECU high-pressure common rail fuel control system and method for a high-strength diesel engine, and belongs to the technical field of engines. According to the system, a main ECU and an auxiliary ECU are adopted to control two oil injectors respectively to inject high-pressure fuel to the same air cylinder, and compared with the use of a single ECU, the fuel pressure in two high-pressure common rails is controlled more flexibly and reliably, and the combustion and emission quality of the high-strength diesel engine is improved; the two two injectors are adopted to provide fuel, so that fuel supply required under a high load can be completed within short oil injection duration, and the aging requirement of the high-strength diesel engine on fuel supply is met; and meanwhile, by matching and adjusting the mounting angles of the main oil injector and the auxiliary oil injector, the jet energy of high-pressure fuel injection is used for organizing airflow to promote mixing of the fuel and the air in the cylinder, and good combustion of the high-strength diesel engine is achieved.

Description

technical field [0001] The invention belongs to the technical field of engines, and more specifically relates to a double-ECU high-pressure common-rail fuel control system and method for a high-strength diesel engine. Background technique [0002] With the renewal and transformation of science and technology, diesel engines have been developing in the direction of more efficient performance, stronger power, and more compact structure. Facing the changing pattern of the world today, countries are paying more and more attention to the improvement of military power. Therefore, high-strength diesel engines Came into being. Compared with ordinary diesel engines, high-strength diesel engines have made great improvements in power density, and the highest power is close to 100kW / L. Therefore, they are widely used in the field of military engines, especially in tanks and armored vehicles. At present, countries all over the world are developing Efforts are being made to make high-pow...

AI Technical Summary

Problems solved by technology

[0004] High-strength diesel engines generally use electronically controlled high-pressure common rail fuel injection in the fuel injection system, and the maximum fuel injection pressure can reach 200MPa~300MPa. Although high-speed fuel injection can significantly improve the degree of fuel atomization in the cylinder, thereby increasing the fuel-gas mixing rate, However, there is a high probability that it will cause the fuel to hit the wall, which will affect the combustion and emission process of the engine.

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