Equipment and method for controlling air system of diesel engine

Abstract

The embodiment of the invention relates to equipment and a method for controlling an air system of a diesel engine. Specifically according to the embodiment, the characteristic of the diesel engine is represented by a transfer function, and the characteristic function is calibrated on the basis of working condition data of the diesel engine in a working area. In the control process, a decoupling transfer function is calculated according to the transfer function and the steady state working condition parameters of the diesel engine. When the decoupling transfer function acts on the processed state parameters of the air system, driving signals used for an exhaust gas recirculation (EGR) system and a turbo charging system can be independently generated, so that decoupling of the two systems is realized. The embodiment of the invention discloses the corresponding equipment, the diesel engine and the method.

Description

technical field [0001] Embodiments of the present invention relate generally to diesel engines and, more particularly, to apparatus and methods for controlling an air system of a diesel engine. Background technique [0002] With the continuous development of engine theory and technology, exhaust gas recirculation (EGR) system has become an important part of diesel engine. Exhaust gas from diesel engines usually contains a large amount of nitrogen oxides (NOx), which is a major source of air pollution. With the EGR system, a portion of the exhaust gas produced by the diesel engine is sent back to the cylinders. Due to the inertness of the recirculated exhaust gas, it will retard the combustion process and slow down the combustion rate, which in turn leads to a slowdown of the pressure build-up process in the combustion chamber, thereby effectively reducing nitrogen oxides. In addition, increasing the exhaust gas recirculation rate reduces the overall exhaust gas flow, so th...

AI Technical Summary

Problems solved by technology

The state observer will introduce time delay and error, which is unfavorable for the control of transient conditions

[0015] To sum up, the control strategies for the diesel engine air system in the prior art cannot well meet the requirements of the diesel engine's actual steady-state and transient operating conditions, emissions and calibration of the diesel engine control unit (ECU) at the same time.

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