Catalytic Exhaust Gas Recirculation-Loop Reforming for High Efficiency in a Stoichiometric Spark-Ignited Engine through Thermochemical Recuperation and Dilution Limit Extension, Part 2: Engine Performance

The article presents results of a spark ignition engine examination, which has been conducted to establish the influence of exhaust gases recirculation on the engine performance and the toxic content in exhaust gases. The research concentrated on identifying a range of recirculation levels, which enabled to eliminate its negative influence on the engine performance by means of selecting an appropriate angle of advance. Further, the article discusses the engine examination procedures involving different recirculation control algorithms in the ECM chip. Finally, the article presents EURO II and EURO III tests, conducted on a vehicle/engine controlled by the above-mentioned software.

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CHARACTERISTICS OF K3-VEI4 ENGINE PERFORMANCE USING SWIRL GENERATOR, AIR INTAKE TANK AND EXHAUST GAS RECIRCULATION MODIFICATION

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.11.2015.28.0209 ◽

2015 ◽

Vol 11 ◽

pp. 2484-2494

Author(s):

M.H. Mat ◽

◽

N.H. Badrulhisam ◽

A.Q. Hanafiah ◽

N.R. Abdullah ◽

...

Keyword(s):

Engine Performance ◽

Exhaust Gas Recirculation ◽

Exhaust Gas ◽

Swirl Generator ◽

Air Intake ◽

Gas Recirculation

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Experimental study of engine performance and emissions for hydrogen diesel dual fuel engine with exhaust gas recirculation

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2019.03.120 ◽

2019 ◽

Vol 44 (23) ◽

pp. 12163-12175 ◽

Cited By ~ 15

Author(s):

Sarthak Nag ◽

Priybrat Sharma ◽

Arpan Gupta ◽

Atul Dhar

Keyword(s):

Experimental Study ◽

Engine Performance ◽

Exhaust Gas Recirculation ◽

Dual Fuel ◽

Exhaust Gas ◽

Performance And Emissions ◽

Engine Performance And Emissions ◽

Gas Recirculation

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Effect of balance valve on an asymmetric twin-scroll turbine for heavy-duty diesel engine

International Journal of Engine Research ◽

10.1177/1468087420930162 ◽

2020 ◽

pp. 146808742093016

Author(s):

Jianjiao Jin ◽

Jianfeng Pan ◽

Zhigang Lu ◽

Qingrui Wu ◽

Lizhong Xu

Keyword(s):

Fuel Economy ◽

High Speed ◽

Engine Speed ◽

Flow Parameter ◽

Engine Performance ◽

Exhaust Gas Recirculation ◽

Exhaust Gas ◽

Engine Fuel ◽

Recirculation Rate ◽

Gas Recirculation

A conventional asymmetric twin-scroll turbine with wastegate is capable of effectively tackling down the contradiction between fuel economy degradation and low nitrogen oxide emissions. However, as the engine speed has been rising at middle- and high-speed ranges, the pressure of small scroll inlet will be increasingly higher as compared with the intake pressure, thereby worsening fuel economy. In this study, a novel turbocharging technology of asymmetric twin-scroll turbine with a balance valve was first analyzed to more effectively balance the engine fuel economy and emission. The experiments on turbine test rig and engine performance were performed to explore the effects of balance valve on turbine performance, asymmetric ratio, exhaust gas recirculation rate, as well as engine performance. As the balance valve open degree was elevated, the turbine flow parameter was being extended, while the turbine efficiency was enhanced. Moreover, a lower asymmetric ratio could lead to a broader flow parameter range between that of partial admission and equal admission, thereby resulting in a broader regulating range of exhaust gas recirculation rate. In contrast with the asymmetric twin-scroll turbine with wastegate, the turbine running efficiency of asymmetric twin-scroll turbine with balance valve was enhanced by nearly 2%–11% at middle and high engine speed ranges, while the fuel economy was improved by nearly 1.5%–8%.

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