A Two-Stage Knock Model for the Development of Future SI Engine Concepts

Physics-Based Modeling and MPC for the Air Path of a Two-Stage Turbocharged SI Engine with Low Pressure EGR

2020 European Control Conference (ECC) ◽

10.23919/ecc51009.2020.9143971 ◽

2020 ◽

Author(s):

Martin Keller ◽

Severin Geiger ◽

Dirk Abel ◽

Thivaharan Albin

Keyword(s):

Low Pressure ◽

Si Engine ◽

Two Stage

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Enhanced Two-stage Ignition Delay Model Based on Molar Fraction of Fuel Components for SI Engine Simulation

10.4271/2018-01-0849 ◽

2018 ◽

Author(s):

Kyoung Hyun Kwak ◽

Dewey Jung ◽

Hyunil Park ◽

Jeonghwan Paeng ◽

Kyumin Hwang

Keyword(s):

Ignition Delay ◽

Molar Fraction ◽

Delay Model ◽

Si Engine ◽

Two Stage ◽

Engine Simulation ◽

Model Based ◽

Fuel Components

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Numerical simulation of two-stage combustion in SI engine with prechamber

Applied Mathematical Modelling ◽

10.1016/j.apm.2012.07.040 ◽

2013 ◽

Vol 37 (5) ◽

pp. 2961-2982 ◽

Cited By ~ 26

Author(s):

Arkadiusz Jamrozik ◽

Wojciech Tutak ◽

Arkadiusz Kociszewski ◽

Marcin Sosnowski

Keyword(s):

Numerical Simulation ◽

Si Engine ◽

Two Stage ◽

Stage Combustion

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A study of performance and emissions of SI engine with a two-stage combustion system

Chemical and Process Engineering ◽

10.2478/v10176-011-0036-0 ◽

2011 ◽

Vol 32 (4) ◽

pp. 453-471 ◽

Cited By ~ 14

Author(s):

Arkadiusz Jamrozik ◽

Wojciech Tutak

Keyword(s):

Combustion Process ◽

Combustion System ◽

Si Engine ◽

Two Stage ◽

Lean Mixture ◽

Engine Efficiency ◽

Excess Air ◽

Stage Combustion ◽

Performance And Emissions ◽

Test Engine

A study of performance and emissions of SI engine with a two-stage combustion systemLean mixture burning leads to a decrease in the temperature of the combustion process and it is one of the methods of limiting nitric oxide emissions. It also increases engine efficiency. An effective method to correct lean mixture combustion can be a two-stage system of stratified mixture combustion in an engine with a prechamber. This article presents the results of laboratory research on an SI engine (spark ignition) with a two-stage combustion system with a cylinder powered by gasoline and a prechamber powered by propane-butane gas LPG (liquefied petroleum gas). The results were compared to the results of research on a conventional engine with a one-stage combustion process. The test engine fuel mixture stratification method, with a two-stage combustion system in the engine with a prechamber, allowed to burn a lean mixture with an average excess air factor equal to 2.0 and thus led to lower emissions of nitrogen oxides in the exhaust of the engine. The test engine with a conventional, single-stage combustion process allowed to properly burn air-fuel mixtures of excess air factors λ not exceeding 1.5. If the value λ > 1.5, the non-repeatability factorCOVLiincreases, and the engine efficiency decreases, which makes it virtually impossible for the engine to operate. The engine with a two-stage combustion process, working with λ = 2.0, theQin/Qtot= 2.5%, reduced the NOxcontent in the exhaust gases to a level of about 1.14 g/kWh. This value is significantly lower than the value obtained in a conventional engine, which worked at λ = 1.3 with comparable non-repeatability of successive cycles (about 3%) and a similar indicated efficiency (about 34%), was characterised by the emissions of NOxin the exhaust equal to 26.26 g/kWh.

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Simulation Study of Divided Exhaust Period for a Regulated Two-stage Downsized SI Engine

10.4271/2014-01-2550 ◽

2014 ◽

Cited By ~ 4

Author(s):

Bo Hu ◽

Chris Brace ◽

Sam Akehurst ◽

Colin Copeland ◽

J.W.G. Turner

Keyword(s):

Simulation Study ◽

Si Engine ◽

Two Stage

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Determining water mass flow control strategies for a turbocharged SI engine using a two-stage calculation method

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2018.09.133 ◽

2019 ◽

Vol 146 ◽

pp. 386-395 ◽

Cited By ~ 1

Author(s):

Peter Hölz ◽

Thomas Böhlke ◽

Thomas Krämer

Keyword(s):

Flow Control ◽

Mass Flow ◽

Calculation Method ◽

Water Mass ◽

Control Strategies ◽

Si Engine ◽

Two Stage

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Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153816 ◽

1989 ◽

Vol 47 ◽

pp. 368-369

Author(s):

Sengshiu Chung ◽

Peggy Cebe

Keyword(s):

Single Crystals ◽

High Performance ◽

Dilute Solution ◽

Two Stage ◽

Annealing Behavior ◽

High Performance Polymers ◽

Seeding Method ◽

Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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