Double-parallel-PID-based control method of engine rotation speed management system and system

Abstract

The invention provides a double-parallel-PID-based control method of an engine rotation speed management system. A high-idle-speed rotation speed request, a low-idle-speed rotation speed request and a rotating speed request of an external device are firstly subjected to upper-limit and lower-limit rotating speed setting, and upper-limit and lower-limit rotating speed setting points are acquired; the difference values between the acquired upper-limit and lower-limit rotating speed setting points and the actual rotating speed value of an engine serve as control parameter input values; upper-limit and lower-limit PI parameter sets are acquired; then, the difference values between the obtained upper-limit and lower-limit rotating speed setting points and an average rotating speed serve as an input value of an upper-limit PID controller and an input value of a lower-limit PID controller respectively; PID control is performed on the input value of the upper-limit PID controller and the input value of the lower-limit PID controller so that PID control values can be output; the PID control values are output as main output to interfere with the required torque of the engine; and the rotating speed of the engine is controlled through the required torque. The double-parallel-PID-based control method is easy to operate, and the rotating speed of the engine can be managed in a unified and effective manner.

Description

technical field [0001] The present invention relates to a control method of an engine speed management system in a high-pressure common rail electronically controlled diesel engine, in particular to a control method of an engine speed management system based on parallel dual PIDs and the system, which is mainly suitable for unifying and controlling the engine speed Manage effectively. Background technique [0002] Engine speed is a very important characteristic variable that characterizes the operating conditions of the engine. In many working conditions, the engine speed must be controlled, and the most typical working condition is idle speed control. Before the large-scale electronic control of diesel engines, mechanical diesel engines generally used governors to regulate the speed. After the implementation of the National Three Regulations, electronically controlled high-pressure common rail has become the mainstream technology of diesel engines, and the speed control is ...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and problems existing in the prior art that the engine speed cannot be managed uniformly and effecti

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