A high-efficiency egr introduction hybrid system

Abstract

The present invention is a high-efficiency EGR introduction mixing system. The control logic is as follows: the vehicle operating conditions are input into the ECU, the ECU adjusts the opening of the intake throttle valve and the EGR valve, the venturi sensor and the intake air temperature and pressure sensor send data to the ECU, the EGR hybrid model is calculated, and the ECU signal is input into the actuator, The upper slider moves up and down to adjust the throat passage of the preheater. When high exhaust gas flow is required to be introduced, by reducing the throat passage of the preheater, the Venturi suction effect is enhanced, and the air flow is further accelerated to hit the exhaust gas flow to ensure mixing uniformity. When low exhaust gas flow introduction is required, air resistance is reduced and performance is improved by increasing the preheater throat passage. The method realizes the intelligent control of the introduction of EGR into the mixing system by intelligently controlling the mixer, realizes the consideration of intake resistance, EGR rate and EGR mixing uniformity, and effectively improves the thermal efficiency of the machine. At the same time, the function is modular, the interface is simple, the interchangeability is high, and it is suitable for different machines.

Description

technical field [0001] The patent of the present invention belongs to the technical field of automobiles, and specifically relates to a high-efficiency EGR introduction hybrid system. Background technique [0002] Regulations have increasingly stringent requirements on engine exhaust emissions. NOx, as the main pollutant in vehicle exhaust emissions, is mainly controlled through the EGR system. Among them, for multi-cylinder engines, limited by the layout of the intake manifold, the uneven EGR rate of each cylinder will cause the combustion system to fail to meet the design requirements. The market's demand for engine power is increasing day by day, and the engine displacement is further increased, requiring higher EGR rate and EGR mixing efficiency. At the same time, the engine economy is improved by intelligently controlling the EGR hybrid system. [0003] At present, the general technical solution to solve the uniformity of each cylinder of EGR is to insert the EGR air ...

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Problems solved by technology

[0005] The patent of the invention provides a high-efficiency EGR introduction mixing system, which solves the problem of engine performance decline caused by uneven EGR mixing, and the problem of high EGR flow resistance and low EGR rate of the plug-in solution

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