Improved engine control method controlled by multiple working conditions PID (proportion integration differentiation)

Abstract

The invention discloses an improved engine control method controlled by multiple working conditions PID (proportion integration differentiation). The method can utilize different PID controllers under different working conditions to regulate the air-fuel ratio of the engine under a steady state working condition, and each steady state working condition is monitored to make a judgment, and a plurality of PID controllers are mutually matched for control, so that the engine can be matched with a better air-fuel ratio. The method disclosed by the invention has the advantages that a control strategy theory adopting the PID control in automobile electronic control is enriched, and help is provided for improvement of efficiency of the engine and reduction of energy conservation and emission reduction of automobiles.

Description

technical field [0001] The invention relates to an improved multi-working-condition PID control engine control method, which belongs to the technical field of automotive electronic automation control. Background technique [0002] Electronic automatic control technology is widely used in automobiles, which can realize digital control of the engine. The electronic control system can realize the best air-fuel ratio and ignition control according to various operating conditions of the engine, so that the mixture can be fully burned and the engine can run smoothly. The optimization of working conditions effectively improves the power, economy and emission indicators of automobile engines. At present, the research work on engine control mainly focuses on two aspects, that is, expanding the function of the control system and exploring new control methods. With the development of advanced electronic technology, automobile engine control tends to be integrated. One is to carry out ...

AI Technical Summary

Problems solved by technology

[0004] As people have higher and higher requirements on the performance of automobiles, especially the engine exhaust emissions and fuel economy, the control strategy of the engine's air-fuel ratio has put forward higher requirements, especially because the commonly used ternary The catalytic converter has the best purification effect only in a narrow range where the air-fuel ratio of the mixture is close to the theoretical air-fuel ratio. Therefore, in this case, the electronic control unit must control the air-fuel ratio of the mixture to be closer to the theoretical air-fuel ratio. To achieve a better effect, but the traditional engine control method can not meet this high requirement, which requires a new control strategy and method for the air-fuel ratio under different working conditions

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