Electronic Fuel Injection Device, System and Control Method for Diesel Engine of Diesel Locomotive

Abstract

The invention discloses a diesel engine fuel oil electronic injecting device and system for a diesel locomotive and a control method of the device and the system. The device and the system are used for carrying out fuel oil injection control over a diesel engine. The device comprises a sensor, a fuel oil injection control unit and an electromagnetic valve driving control unit. The sensor is used for detecting the position and the rotating speed of a crankshaft or cam; according to position and rotating speed signals, output by the sensor, of the crankshaft or cam and a given target rotating speed signal, the fuel oil injection control unit calculates and outputs an electromagnetic valve fuel oil injection signal; and the electromagnetic valve driving control unit drives the output of the fuel oil injection control unit, outputs a fuel oil injection driving signal to an electromagnetic valve and carries out fuel oil injection control over a single pump or an oil injector of the diesel engine through the electromagnetic valve. By means of the device and the system, timed and quantitative precise control over the fuel oil injection of the diesel engine can be achieved, fuel oil consumption rate and emissions of harmful gas are reduced, and meanwhile, control is easy, convenient, effective and high in reliability.

Description

technical field [0001] The invention relates to the field of rail transportation equipment, in particular to a diesel engine fuel electronic injection device, system and control method widely used in diesel locomotives. Background technique [0002] A diesel locomotive is a locomotive that uses an internal combustion engine as a driving force to drive wheels through a transmission. According to the type of internal combustion engine on the locomotive, it can be divided into diesel locomotive and gas turbine locomotive. Because the efficiency of gas turbine locomotives is lower than that of diesel locomotives, the cost of high-temperature-resistant materials is high, and the noise is large, it has been eliminated in the field of internal combustion locomotives. The vast majority of internal combustion engines used on my country's railways are diesel engines. The working principle of a diesel locomotive using a diesel engine is: fuel (diesel) is burned in the cylinder, and t...

AI Technical Summary

Problems solved by technology

[0004] (1) The mechanical fuel injection system still uses the fuel injection pump plunger position control rack on the fuel injection actuator, and the control accuracy can only reach 1%, which cannot be further improved;

[0005] (2) The fuel injection pressure of the mechanical fuel injection system cannot be effectively increased at 25MPa, and the combustion quality is poor;

[0006] (3) The gaps between components in the mechanical fuel injection system result in low fuel injection timing accuracy, and the fuel injection timing of each cylinder cannot be adjusted freely, which affects the overall performance;

[0007] (4) The mechanical fuel injection system cannot achieve fast pre-injection and multiple injections, and the control of harmful gas emissions is still limited;

[0008] (5) The mechanical fuel injection system cannot dynamically correct the differences between the cylinders, resulting in the inability to improve the overall performance of the diesel engine

[0009] The second type of electronic fuel injection system, because the system is imported from abroad, its technology is not transferred, and the core technologies such as electronic control technology, electronic injection controller, electronic control pump and drive are monopolized by foreign companies, and only simple adjustments are made in China. school

[0010] (1) At present, the electronic fuel injection systems of 12-cylinder and 16-cylinder diesel engines commonly used in domestic diesel locomotives are imported from abroad. Foreign parties strictly prohibit the technology transfer of electronic fuel injection systems, and only simple adjustments can be made. play is severely limited;

[0011] (2) The electronic fuel injection system imported from abroad generally adopts the camshaft position sensor plus the crankshaft position sensor. The diesel engine must be equipped with a camshaft gear plate and a crankshaft gear plate. When a sensor fails, the system cannot operate normally;

[0012] (3) Overseas EFI systems are expensive, making locomotive manufacturing costs, maintenance and replacement costs high, limiting the use and promotion of diesel locomotives

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