In order to meet the economy, reliability and increasingly stringent emission regulations of engines, electronic engine control technology came into being. At present, the third generation of electronic control technology has entered the pressure-time-common rail electronic control fuel injection system, which makes it easier to realize the flexible control of high-pressure water jet and injection parameters, and is an important development direction of electronic control fuel injection system for diesel engines in the future.
This paper mainly takes 200 diesel engine as the prototype, and designs a set of electronic control booster pump mechanism and hydraulic oil source system for medium pressure rail to meet the following requirements: high and flexible average effective injection pressure; Low pre-injection function or initial injection rate; Accurate control of fuel injection quantity and quick oil stop function; Flexible fuel injection timing control.
Based on 200 main engines, a set of electronically controlled common rail pressure booster pump and hydraulic oil source system is designed, which meets the following requirements: flexible and adjustable pre-injection function of high and average effective spray pressure or low initial injection quantity; Precise control of fuel injection and quick oil stop function; Flexible injection timing control.
The characteristics of this paper are as follows: (1) the medium pressure common rail electronic control booster pump mechanism has a high and flexible average effective injection pressure; Pre-injection can be realized through the oil drain hole on the end face of the plunger of the booster pump, which effectively reduces the combustion noise and fuel consumption of the diesel engine.
The characteristics of this paper are: in the electronically controlled booster pump with high common rail pressure, the average effective spray pressure is flexible and adjustable, and the pre-injection is realized through the exhaust hole on the plunger surface of the booster pump, thus effectively reducing the noise and fuel consumption of the internal combustion engine.