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Shanghai, China

Liu Y.-B.,University of Shanghai for Science and Technology | Chu C.-M.,University of Shanghai for Science and Technology | Ling J.-Q.,Shanghai Diesel Engine Co.
Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering | Year: 2014

In order to realize Internal Exhaust Gas Recirculation (IEGR) by using the method applying exhaust port pressure wave, the pressure wave varying characteristics in exhaust port during intake process were experimentally studied. For a turbocharged six-cylinder diesel engine, taking engine speed, load and injection advance angle (IAA) as operation condition variables, effects of every variable on the pressure wave shape, peak value and position (crankshaft angle) were studied respectively. Results show that the pressure wave peak value increases with engine load increasing, and its position is not affected by the load; with engine speed increasing, the pressure wave peak position retards, and its varying amplitude reaches the largest at IAA of 6°CA; with IAA decreasing, the pressure wave peak position retards in 100% and 75% of rated load. Source

Zhao F.-Z.,Ningbo University of Technology | Wang J.-X.,Shanghai JiaoTong University | Ji L.-W.,Shanghai Diesel Engine Co. | Huang Y.-Q.,Ningbo University of Technology
Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering | Year: 2013

In order to exploit potentialities of energy saving, test investigation of waste heat sources in a light-duty vehicle powered by diesel engine was implemented for recovering waste heat energy using thermoelectric modules. By simulating vehicle driving conditions, in a temperature control laboratory it is obtained that the temperature of waste heat sources, such as water cooling system, cylinder head, cylinder block, oil pan, exhaust manifold and pipe, and so on, ranges from 34°C to 487°C. The temperature of outer wall around the manifold and exhaust pipe is highest, and that of outer wall around the water cooling system is lowest. Moreover, various parts of the same component also present different temperature distributions. These results, temperature distribution of waste heat source, temperature range, and temperature variation following vehicle conditions may provide theoretical basis for thermoelectric module arrangement and thermoelectric property utilization. Source

Chu C.,University of Shanghai for Science and Technology | Yan T.,University of Shanghai for Science and Technology | Ling J.,Shanghai Diesel Engine Co. | Li J.,University of Shanghai for Science and Technology
Qiche Gongcheng/Automotive Engineering | Year: 2012

In this paper, taking a 6-cylinder supercharged diesel engine as object, a simulation design of the secondary exhaust cam, which reopens exhaust valve, is conducted for realizing the internal exhaust gas recirculation of diesel engine based on the strategy of exhaust gas re-suction. Specifically, a GT-Power simulation model for object engine is built first, and a simulation on the pressure wave in exhaust pipe is performed to determine the timing and duration of exhaust valve reopen, as the boundary conditions of cam design. Then on this base ten cam profiles with different lifts and duration angles are designed, and the rule of the effects of cam design parameters such as timing, duration angle and lift on the power and fuel economy performances and EGR rate of diesel engine is found. Finally the reasonable ranges of timing, lift and duration angle of secondary exhaust cam are given. Source

Li W.,Shanghai University of Engineering Science | Chen L.,Shanghai University of Engineering Science | Liu X.,Shanghai Diesel Engine Co. | Liu Y.,Shanghai University of Engineering Science
Advanced Materials Research | Year: 2012

In this paper, we shall first briefly introduce fuzzy sets and related concepts of the reaction principle of Cu-ZSM-5 catalyst with the NO, and the preparation of Cu-ZSM-5 catalyst is also investigated. And the NOx conversion efficiency of Cu-ZSM-5 catalyst is analyzed with the experiment. Compared to V 2O 5/WO 3/TiO 2 catalyst, the reaction activity of Cu-ZSM-5 catalyst at low temperature is much better, while the range of reaction activity temperature of V 2O 5/WO 3/TiO 2 catalyst is relatively wide. Finally, with the diesel engine ESC test, the Cu-ZSM-5 Catalyst for SCR system can effectively reduce the NOx emissions, and the diesel engine which is installed the SCR is able to achieve the requirements of Euro IV for NOx limits. © (2012) Trans Tech Publications, Switzerland. Source

Long K.,Beijing Institute of Technology | Long K.,North China Electrical Power University | Zuo Z.-X.,Beijing Institute of Technology | Xiao T.,Beijing Institute of Technology | And 2 more authors.
Journal of Beijing Institute of Technology (English Edition) | Year: 2010

The independent continuous mapping(ICM) method is integrated into element free Galerkin method and a new implementation of topology optimization for continuum structure is presented. To facilitate the enforcement of the essential boundary condition and derivative of various sensitivities, a singular weight function in element free Galerkin method is introduced. Material point variable is defined to illustrate the condition of material point and its vicinity instead of element or node. The topological variables field is constructed by moving least square approximation which inherits the continuity and smoothness of the weight function. Due to reciprocal relationships between the topological variables and design variables, various structural responses sensitivities are derived according to the method for calculating the partial derivatives of compound functions. Numerical examples indicate that checkerboard pattern and mesh-dependence phenomena are overcome without additional restriction methods. Source

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