Exhaust gas muffler for a two‐stroke engine

1992 ◽  
Vol 92 (4) ◽  
pp. 2280-2280
Author(s):  
Hartmut Fischer
Keyword(s):  
Exhaust Gas ◽  
Stroke Engine

scholarly journals Exhaust Gas Flow Behavior in a Two-Stroke Engine.

1993 ◽  
Vol 59 (559) ◽  
pp. 981-987
Author(s):  
Yuji Ikeda ◽  
Tetsuya Ohira ◽  
Toshiyuki Takahashi ◽  
Takekazu Itoh ◽  
Tsuyoshi Nakajima
Keyword(s):  
Gas Flow ◽  
Flow Behavior ◽  
Exhaust Gas ◽  
Stroke Engine

scholarly journals Modification of four-stroke engine for operation in two-stroke cycle for automotive application

2015 ◽  
Vol 162 (3) ◽  
pp. 3-12
Author(s):  
Władyslaw MITIANIEC ◽  
Konrad BUCZEK
Keyword(s):  
Injection System ◽  
Geometrical Parameters ◽  
Total Efficiency ◽  
Exhaust Gas ◽  
Valve Timing ◽  
Gas Emission ◽  
Engine Operation ◽  
Poppet Valve ◽  
Exhaust Gas Emission ◽  
Stroke Engine

The main disadvantages of two-stroke engines such a big fuel consumption and big emission of hydrocarbons or carbon monoxide can be reduced by new proposal of design of two stroke engine based on four stroke engines. The paper describes the operation of high supercharged spark ignition overhead poppet valve two-stroke engine, which enables to achieve higher total efficiency and exhaust gas emission comparable to four-stroke engines. The work of such engines is possible by proper choice of valve timings, geometrical parameters of inlet and outlet ducts and charge pressure. The engine has to be equipped with direct fuel injection system enabling lower emission of pollutants. The work is based on theoretical considerations and engine parameters are determined on the simulation process by use GT-Power program and CFD program for different engine configurations. The initial results included in the paper show influence of valve timing on engine work parameters and predicted exhaust gas emission. The simulation results show that the nitrogen oxides are considerably reduced in comparison to four-stroke engines because of higher internal exhaust gas recirculation. The innovation of this proposal is applying of variable valve timing with turbocharging system in the two-stroke engine and obtaining a significant downsizing effect. The conclusions shows the possibilities of applying two-stroke poppet valve engine as a power unit for transportation means with higher total efficiency than traditional engines with possible change of engine operation in two modes: two- and four stroke cycles. The main disadvantages of two-stroke engines such a big fuel consumption and big emission of hydrocarbons or carbon monoxide can be reduced by new proposal of design of two stroke engine based on four stroke engines. The paper describes the operation of high supercharged spark ignition overhead poppet valve two-stroke engine, which enables to achieve higher total efficiency and exhaust gas emission comparable to four-stroke engines. The work of such engines is possible by proper choice of valve timings, geometrical parameters of inlet and outlet ducts and charge pressure. The engine has to be equipped with direct fuel injection system enabling lower emission of pollutants. The work is based on theoretical considerations and engine parameters are determined on the simulation process by use GT-Power program and CFD program for different engine configurations. The initial results included in the paper show influence of valve timing on engine work parameters and predicted exhaust gas emission. The simulation results show that the nitrogen oxides are considerably reduced in comparison to four-stroke engines because of higher internal exhaust gas recirculation. The innovation of this proposal is applying of variable valve timing with turbocharging system in the two-stroke engine and obtaining a significant downsizing effect. The conclusions shows the possibilities of applying two-stroke poppet valve engine as a power unit for transportation means with higher total efficiency than traditional engines with possible change of engine operation in two modes: two- and four stroke cycles.

scholarly journals Evaluation of Exhaust Gas Recirculation and Fuel Injection Strategies for Emission Performance in Marine Two-Stroke Engine

2019 ◽  
Vol 158 ◽  
pp. 4523-4528 ◽  
Author(s):  
Enxing Zhang ◽  
Xingyu Liang ◽  
Fei Zhang ◽  
Peijian Yang ◽  
Xinyi Cao ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Emission Performance ◽  
Gas Recirculation ◽  
Stroke Engine ◽  
Injection Strategies

Measurement of Exhaust Gas Temperatures in a High Performance Two-Stroke Engine

1998 ◽  
Author(s):  
Robert J. Kee ◽  
Paul G. O'Reilly ◽  
Robert Fleck ◽  
Paul T. McEntee
Keyword(s):  
High Performance ◽  
Exhaust Gas ◽  
Stroke Engine

scholarly journals The CFD analysis of influence the start of fuel injection (SOI) on combustion parameters and exhaust gas composition of the marine 4-stroke engine

2019 ◽  
Vol 177 (2) ◽  
pp. 40-45
Author(s):  
Jerzy KOWALSKI
Keyword(s):  
Fuel Injection ◽  
Combustion Process ◽  
Three Dimensional ◽  
Injection Timing ◽  
Zone Model ◽  
Exhaust Gas ◽  
Nitric Oxides ◽  
Injection Angle ◽  
The Impact ◽  
Stroke Engine

The paper presents a theoretical analysis of the impact of injection timing on the parameters of the combustion process and the com-position of exhaust gas from a 4-stroke engine designed to shipbuilding. The analysis was carried out based on a three-dimensional multi-zone model of the combustion process. This model has been prepared on the basis of properties of the research facility. The input data to the model were obtained through laboratory tests. Results of calculations showed that the change of the start of injection angle (SOI) from the value of 14 degrees before TDC to 22 degrees before TDC results in changes in the combustion rate and thus an increase in the temperature of the combustion process as well as the increase of nitric oxides fraction in the exhaust gas. Simultaneously the maximum combustion pressure increases also.

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