Development of the Long-Stroke Version of the Mitsubishi SU Diesel Engine

A Mitsubishi S6U2 six-cylinder, in line diesel engine has been developed as a long-stroke version of the SU engine with a bore of 240 mm. This SU engine has a production record of more than 300 units. The stroke of this long-stroke version is 300 mm, compared with 260 mm for present SU engines. This paper introduces the S6U2 engine, which has now been put into regular production and describes research that has been conducted through the period of development. In the aspect of performance in particular, this paper explains reduction in fuel consumption by optimizing inlet and exhaust valve timings and improving turbocharger performance, and the reduction of NOx by modifying the fuel injection system. In the aspect of reliability, this paper explains FEM calculation with a three-dimensional model and a stress measurement under real operation for the crankshaft. The results of stress measurement on the crankcase are also described.

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3-D Numerical Simulation on Micro-Hole of the Common-Rail Pipe Abrasive Flow Machining

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.437.202 ◽

2013 ◽

Vol 437 ◽

pp. 202-206

Author(s):

Hao Guo ◽

Jun Ye Li ◽

Teng Fei Ma

Keyword(s):

Numerical Simulation ◽

Fuel Injection ◽

Volume Fraction ◽

Three Dimensional ◽

Common Rail ◽

Injection System ◽

Three Dimensional Model ◽

Abrasive Flow Machining ◽

Micro Hole ◽

The Common

Common-rail pipe is an important component of fuel injection system, whose inner cavity is hidden and requires a high precision. So that the general mechanical processing is difficult to achieve, while abrasive flow machining just be able to solve this problem. In this article, the three-dimensional model of common-rail pipe is established and meshed by GAMBIT, next the mesh file is read into FLUENT, and then the Mixture model is used for numerical simulation. By analyzing the simulation results, we can get how will the pressure difference between inlet and outlet, the volume fraction of abrasive, and the processing order impact on the processing quality. Finally, a reasonable processing program is proposed for the common-rail pipe.

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Study for Three-Dimensional Design of the Engine Crankshaft Piston Group

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.562-564.1079 ◽

2012 ◽

Vol 562-564 ◽

pp. 1079-1082

Author(s):

Yong Feng Liu ◽

Pu Cheng Pei ◽

Jian Wei Yang ◽

Ai Hua Zhu

Keyword(s):

Diesel Engine ◽

Three Dimensional ◽

Feature Modeling ◽

Dimensional Model ◽

Three Dimensional Model ◽

Piston Group ◽

Characteristic Modeling ◽

Design Ideas ◽

Engine Crankshaft ◽

Part Model

In order to establish the three-dimensional model of the crankshaft piston group, the application of characteristic modeling method was proposed directly through the designer to extract features from the BULL operations, and finally form a part model of the design and definition. Analysis of the expression of the crankshaft features and characteristics of the link, use Pro-E to build a diesel engine crankshaft and the piston rod group of feature modeling. a new three-dimensional assembly drawings was built. It provide a new design ideas for reserachers.

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Combined effects of combustion chamber geometry and injection strategy on combustion and emissions of a diesel engine

E3S Web of Conferences ◽

10.1051/e3sconf/202126801026 ◽

2021 ◽

Vol 268 ◽

pp. 01026

Author(s):

Jizhou Zhang ◽

Fuwu Yan ◽

Yu Wang

Keyword(s):

Diesel Engine ◽

Combustion Chamber ◽

Fuel Injection ◽

Direct Injection ◽

Three Dimensional ◽

Three Dimensional Model ◽

Complete Combustion ◽

Injection Strategy ◽

Injection Duration ◽

Chamber Volume

For a certain type of direct injection diesel engine, a three-dimensional model of a single-cylinder complete combustion chamber and in-take/exhaust port was established. Three-dimensional Computational Fluid Dynamics (CFD) analysis software CONVERGE was used for simulation. The effects of fuel injection strategy and combustion chamber geometry on combustion emissions of diesel engine were studied while the combustion chamber volume, engine compression ratio, total fuel injection quantity and total injection duration were kept unchanged. The results show that the strategy of multiple injection and reasonable shape of combustion chamber can effectively increase the turbulent kinetic energy in cylinder, improve the uniformity of oil-gas mixing, reduce the emission of pollutants, and increase the quality of after injection can further reduce the emissions of NOx and soot.

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E205 THREE-DIMENSIONAL NUMERICAL AND STRUCTURAL OPTIMIZATION ON FUEL INJECTION SYSTEM OF LOCOMOTIVE DIESEL ENGINE(Diesel Engine)

The Proceedings of the International Conference on Power Engineering (ICOPE) ◽

10.1299/jsmeicope.2009.2._2-389_ ◽

2009 ◽

Vol 2009.2 (0) ◽

pp. _2-389_-_2-392_ ◽

Cited By ~ 1

Author(s):

HongJiang CUI ◽

MingHai LI ◽

YunDong HAN ◽

Ang LI

Keyword(s):

Diesel Engine ◽

Structural Optimization ◽

Fuel Injection ◽

Three Dimensional ◽

Injection System ◽

Fuel Injection System ◽

Locomotive Diesel

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A Design Modification of the Delivery Valve and the Constant Pressure Valve in a Medium Speed Diesel Engine Fuel Injection System for the Prevention of Cavitation Damage and Secondary Injection

Energy Conversion and Resources ◽

10.1115/imece2005-80730 ◽

2005 ◽

Cited By ~ 1

Author(s):

Dong-Hun Kim ◽

Hong-Won Kim ◽

Sang-Hak Ghal ◽

Ji-Soo Ha

Keyword(s):

Diesel Engine ◽

Fuel Injection ◽

Constant Pressure ◽

Three Dimensional ◽

Injection System ◽

Fuel Injection System ◽

Cavitation Damage ◽

Medium Speed ◽

Loss Coefficients ◽

Secondary Injection

A fuel injection with high pressure in a medium speed diesel engine would increase the possibility of cavitation damage in the fuel injection system or secondary injection to the combustion chamber. The purpose of this study is to prevent cavitation and secondary injection in a medium speed diesel engine by modifying the design of the delivery valve and the constant pressure valve in a fuel injection system. Three-dimensional flow analyses for the fuel injection nozzle, delivery valve, constant pressure valve and spill port were performed using FLUENT S/W to calculate loss coefficients of them. Simulation of fuel injection system with loss coefficients from results of three-dimensional flow analyses were performed using FLOWMASTER2 S/W and the simulation results were compared with the experimental data. The delivery valve and constant pressure valve were modified to prevent cavitation and secondary injection and proved in the field test.

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