Informatics Publishing Limited

N. Vijay ¹, N. Muthumohanraj ², A. Sathish Kumar ²

Affiliations
1 Department of Electrical and Electronics Engineering, Velalar College of Engineering and Technology, Erode, IN
2 Department of Electrical and Electronics Engineering, Velalar College of Engineering and Technology, Erode, IN

Abstract

Pseudo-exhaustive pattern generators for built-in self-test (BIST) provide high fault coverage of detectable combinational faults with much fewer test vectors than exhaustive generation. In (n,k)-adjacent bit pseudo-exhaustive test sets, all 2^k binary combinations appear to all adjacent k-bit groups of inputs. With recursive pseudo-exhaustive generation, more than one module can be pseudo-exhaustively tested in parallel. In order to detect sequential (e.g., stuck-open) faults that occur into current CMOS circuits, two-pattern tests are exercised. Also, delay testing, commonly used to assure correct circuit operation at clock speed requires two-pattern tests. In this paper a pseudo-exhaustive two-pattern generator is presented, that recursively generates all two-pattern (n,k)-adjacent bit pseudo-exhaustive tests for all . To the best of our knowledge, this is the first time in the open literature that the subject of recursive pseudo-exhaustive two-pattern testing is being dealt with. A software-based implementation with no hardware overhead is also presented.

Keywords

Built-In Self-Test (BIST), Pseudoexchaustive Two pattern Testing, Test Pattern Generation.

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P. Sabarish Kumar ¹, S. Ashwin Kannan ¹, A. Sathish Kumar ¹, K. Arun Vasantha Geethan ¹

Affiliations
1 St. Joseph’s Institute of Tech., Chennai, IN

Abstract

In this study, for the first time analysis of a low heat rejection engine was carried out along with the addition of oxidation inhibitors. If the combustion chamber components of the engine such as piston, cylinder head, and inlet and outlet valves are insulated with a thermal barrier material, then the engine will be referred as low heat rejection engine. In this study yttria stabilized zirconia was coated on the combustion chamber components for a thickness of about 150 microns. Then the analysis of performance parameters such as brake thermal efficiency and specific fuel consumption and emission characteristics such as emission of carbon monoxide, hydrocarbon and nitrogen oxide was carried out in single cylinder four stroke diesel engine with electrical loading using diesel and pongamia methyl ester as the fuels. The major problem associated with the usage of biodiesels and low heat rejection engine is the increased NOX emission than the normal engine operated with the diesel. This problem has been overcome by the usage of oxidation inhibitors such as ethyl hexyl nitrate (EHN), tert-butyl hydroquinone (TBHQ). The results showed that addition of oxidation inhibitors leads to increase in brake thermal efficiency, reduced specific fuel consumption and reduced NOX emission.

Keywords

Low Heat Rejection Engine, Yttria Stabilized Zirconia, Pongamia Methyl Este, Oxidation Inhibitor.

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