Dynamic Modeling of a Lean NOx Trap for Lean Burn Engine Control
نویسندگان
چکیده
A control oriented dynamic model of the Lean NOx Trap (LNT) behavior has been developed in SIMULINK. The model simulates the trapping and purging phenomena and includes the important parameters which affect the LNT behavior. These include the trap temperature, trapping and purging duration, air fuel ratios and the mass flow rates of the exhaust gases. Engine dynamometer test data have been used to identify the model parameters and to validate the model structure. There is good agreement between the simulation results and test data. The model is suitable for control and fuel / emission tradeoff analysis.
منابع مشابه
Approximate Dynamic Programming Solutions for Lean Burn Engine Aftertreatment
The competition to deliver fuel e cient and environmentally friendly vehicles is driving the automotive industry to consider ever more complex powertrain systems. Adequate performance of these new highly interactive systems can no longer be obtained through traditional approaches, which are intensive in hardware use and nal control software calibration. This paper explores the use of dynamic pr...
متن کاملInvestigation of Swirling and Tumbling Flow Pattern of Spark Ignition Engine
Gas motion within the cylinder is one of the major factors that control the combustion process in spark ignition engine. It also has significant impact on heat transfer. Both the bulk gas motion and the turbulence characteristics of the flow are important and governing the overall behavior of the flow. An arrangement for obtaining a stratified charge, using port injection, is proposed for a ...
متن کاملExperimental Investigation of The Performance Response of A Spark Ignition Engine to Adding Natural Gas to Gasoline in Lean-Burn Condition
Considering the disadvantages of gasoline and natural gas as mono-fuel in SI engines has made the researchers to improve the performance and reduce the pollutant as the advantages of the application of dual fuel engines. On the other hand, lean-burn in engine may lead to the reduced pollutant. In the present study various mixtures of gasoline and natural gas with the gasoline as the dominant fu...
متن کاملAir-Fuel Ratio Control of a Lean Burn SI Engine Using Fuzzy Self Tuning Method
Reducing the exhaust emissions of an spark ignition engine by means of engine modifications requires consideration of the effects of these modifications on the variations of crankshaft torque and the engine roughness respectively. Only if the roughness does not exceed a certain level the vehicle do not begin to surge. This paper presents a method for controlling the air-fuel ratio for a lean bu...
متن کاملAn Experimental and Theoretical Study of the Effects of Excess Air Ratio and Waste Gate Opening Pressure Threshold on Nox Emission and Performance in a Turbocharged CNG SI Engine
Turbocharged CNG engines produce high NOx emission due to the fuel type and high combustion temperature. In this research, the effects of lean-burn and waste gate opening pressure threshold on NOx emission are studied theoretically and experimentally at WOT condition as well as 13-mode ECE-R49 test cycle. A code is developed in MATLAB environment for predicting engine NOx and the results are va...
متن کامل