Sequential turbocharging type electronic control common rail oil injection system
A technology of successive supercharging and fuel injection systems, applied in the charging system, fuel injection device, engine components, etc., can solve the problems of limiting diesel engine performance, difficult to further improve system injection performance, insufficient adjustment ability, etc., to improve economy. and power performance, reduce harmful emissions, overcome the effect of large volume
Inactive Publication Date: 2014-03-26
HARBIN ENG UNIV
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Problems solved by technology
However, the current electronically controlled common rail system has insufficient ability to adjust the fuel injection law, especially the fuel injection law in the main injection stage, and it is difficult to further improve the injection performance of the system, which limits the further optimization of diesel engine performance.
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[0021] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0022] to combine Figure 1~4 , figure 1 It is a schematic diagram of the structure of the sequential pressurized electronically controlled common rail fuel injection system. The sequentially pressurized electronically controlled common rail fuel injection system mainly includes fuel tank 1, high pressure oil pump 3, fuel filters 2, 6, high pressure fuel pipes 4, 5, The common rail pipe 8, the boost control part 10 and the electronically controlled fuel injector 11 in succession.
[0023] The fuel in the fuel tank 1 is sent to the common rail pipe 8 by the high-pressure oil pump 3 through the high-pressure oil pipes 4 and 5 after being filtered by the fuel filters 2 and 6 . A pressure limiting valve 7 and a pressure sensor 9 are installed on the common rail pipe 8 . The pressure limiting valve 7 is used to limit the rail pressure. When the rail pressure exceeds...
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The invention aims to provide a sequential turbocharging type electronic control common rail oil injection system, which comprises an oil tank, an oil pump, a common rail pipe, a sequential turbocharging control part, an electronic control oil injection device, a pressure-limiting valve and a pressure sensor, wherein the oil pump is connected with the oil tank and the common rail pipe; fuel in the oil tank is conveyed to the common rail pipe; the common rail pipe is provided with the pressure-limiting valve and the pressure sensor; the common rail pipe is communicated with the oil tank by the pressure-limiting valve; and the electronic control oil injection device, the sequential turbocharging control part and the common rail pipe are successively connected. According to the sequential turbocharging type electronic control common rail oil injection system, the oil injection pressure of the system is flexibly and quickly controlled by the cooperative control of two supercharging unit solenoid valves and a solenoid valve on the electronic control oil injection device, and the defects of big volume and low pressure change rate of the common rail pipe of marine large-middle diesel engines are overcome. The oil injection rate of the system can be flexibly changed, the rectangular and step-shaped injection rate can be realized, the requirement on the oil injection pressure and an oil injection rule under different working conditions and different revolving speeds for the diesel engines, the economy and the power performance of the diesel engine can be effectively improved, and the harmful emission is lowered.
Description
technical field [0001] The invention relates to an engine, in particular to an engine fuel injection system. Background technique [0002] With the rapid development of electronically controlled fuel injection technology for diesel engines and the increasingly stringent emission regulations for marine diesel engines, the adoption of new electronically controlled fuel injection systems has become an inevitable trend in the development of marine diesel engines. The electronically controlled common rail fuel injection system can quickly, accurately and flexibly control the fuel injection quantity and injection law of the diesel engine, effectively improve the economic performance and power performance of the diesel engine, and at the same time greatly reduce harmful emissions. It is currently the most advanced electronically controlled fuel injection system. One of the injection systems has been widely used in marine diesel engines. [0003] The electronically controlled commo...
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IPC IPC(8): F02M51/00F02M51/06
Inventor 田丙奇范立云王昊马修真宋恩哲李学民李文辉孙军袁志国
Owner HARBIN ENG UNIV