Transient compensation method and system for nitrogen oxide discharging of automobile engine

Abstract

The embodiment of the invention discloses a transient compensation method and a transient compensation system for nitrogen oxide discharging of an automobile engine. The method comprises the following steps of: acquiring fuel charge and engine speed, inquiring a steady state MAP to acquire steady state discharge of a nitrogen oxide, and determining the discharge as a basic value; determining rotation speed change rate, oil injection change rate, air inflow change rate, oil injection angular advance change rate, and oil injection pressure change rate; correcting the acquired values according to preset correction factors respectively; and taking the corrected values as the nitrogen oxide original discharge of the automobile engine. In the method and the system, critical factors influencing discharge are corrected, and the basic value acquired by inquiring the MAP table is compensated by the correct results, so that the calculated error between NOx concentration and actual concentration in a transient cycle is reduced, and basis is provided for subsequent improvement on discharge control and on-board diagnostics (OBD) monitoring accuracy.

Description

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AI Technical Summary

Benefits of technology

This technology helps reduce harmful gases from diesel cars that emit them during their operation without compromising on performance or safety issues. It uses an algorithm called Transientsense Reflectance (TRE) which compares two different concentrations taken at specific points within time before they hit another point where there are no significant changes made overall. By doing these calculations correctly, engine manufacturers can improve fuel efficiency while minimizing pollution caused by exhaust gas.

Problems solved by technology

Technological Problem addressed in this patents relates to improving the efficiency and effectiveness of reducing harmful gases released when automobiles use fuels containing excess amounts of oxygen or other impurities like carbon monoxide. Current methods for controlling these pollutants include selectively catalyst systems called SCR(Selective Catalysitronate Reductase)-based techniques, which aim to convert them into harmless substances without causing environmental concerns. These new techniques involve injecting urea solutions onto the tailpipe through specific nozzles while reacting them with reactions generated within the vehicle's combustion chamber.

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