Efficient EGR introducing and mixing system

Abstract

The invention discloses an efficient EGR introducing and mixing system. According to the control logic, the vehicle working condition is input into an ECU, the opening degree of the air inlet shutterand an EGR valve is adjusted by the ECU, a venturi tube sensor and an air inlet temperature and pressure sensor send data to the ECU, and an EGR mixed model is calculated; and an ECU signal is input into an actuator, an upper sliding block vertically slides, and a preheater throat channel is adjusted. When high waste flow needs to be introduced, the preheater throat channel is reduced, and the venturi suction effect is enhanced; and meanwhile, air flow is further accelerated to collide with the waste flow, and mixing uniformity is guaranteed. When low waste flow needs to be introduced, the preheater throat channel is increased, air resistance is reduced, and the performance is improved. According to the method, a mixer is intelligently controlled, intelligent control over the EGR introducing and mixing system is achieved, the air inlet resistance, the EGR rate and the EGR mixing uniformity are all taken into account, and the machine heat efficiency is effectively improved. Meanwhile, the function is modular, a connector is simple, high interchangeability is achieved, and the efficient EGR introducing and mixing system is matched with 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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