Modular diesel engine double-valve common rail system with flexible and adjustable oil injection rule

Abstract

The invention aims to provide a modular diesel engine double-valve common rail system with the flexible and adjustable oil injection rule. A high-pressure oil pump is connected with an oil tank and a common rail pipe, the common rail pipe is connected with an electronic control oil injector through a high-pressure oil pipe, and the electronic control oil injector is connected with the oil tank through an oil return pipe. The electronic control oil injector comprises a pressurization control valve module, a pressurization module, a fastening module, a piezoelectric driving module, an oil injection control module and a nozzle module. The pressurization control valve module is located above the pressurization module, the pressurization module and the piezoelectric driving module are installed in the fastening module, and the lower portion of the fastening module is located in the nozzle module. The oil injection control module is located in the nozzle module. The plunger sleeve plays a role in pressurizing and also plays a role in controlling of the opening and closing of an oil way, so that the complexity of the system structure is reduced. And a control cavity is always communicated with the common rail pipe, so that the system has the capability of realizing a slow-first and fast-second oil injection rule form, and the overall working quality of the diesel engine can be better improved.

Description

technical field [0001] The invention relates to a fuel injection system, specifically a common rail system of a diesel engine. Background technique [0002] The fuel system is the "heart" of a diesel engine, and it is the core technology to improve diesel engine emission levels, fuel economy and power performance. An ideal diesel engine fuel system should have high fuel injection pressure, and the fuel injection regularity, fuel injection pressure and injection timing can be adjusted. Features such as flexible control. The traditional mechanical fuel system is difficult to take into account the control of fuel injection timing, fuel injection volume and fuel injection law under different working conditions, and has the disadvantages of low control accuracy and slow dynamic response. It is difficult to achieve the optimal control of the diesel engine transient process, which limits the Further optimization of diesel engine emissions and fuel economy. The electronic control ...

AI Technical Summary

Problems solved by technology

However, although the common rail system has shown outstanding advantages in improving the overall performance of diesel engines, there is still a lot of room for improvement in terms of injection pressure, fuel injection regularity, and response speed.

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