PERFORMANCE, EXHAUST EMISSIONS AND COMBUSTION CHARACTERISTICS OF MOHR OIL BASED BIODIESEL IN A MEDIUM GRADE LOW HEAT REJECTION DIESEL ENGINE
Journal Title: International Journal of Automotive Engineering and Technologies - Year 2013, Vol 2, Issue 2
Abstract
Experiments were carried out to evaluate the performance of a mohr oil based biodiesel (MOBD) at different operating conditions [normal temperature and pre-heated temperature] in a medium grade low heat rejection (LHR) diesel engine with an air gap insulated piston with superni (an alloy of nickel) crown and air gap insulated liner with superni insert with varied injector opening pressure and injection timing. Performance parameters and exhaust emissions of smoke and oxides of nitrogen (NOx) were determined at different values of brake mean effective pressure (BMEP) of the engine. Combustion characteristics were recorded at peak load operation of the engine. Combustion parameters were measured with TDC (top dead centre) encoder, pressure transducer, console and special pressure-crank angle software package. Conventional engine (CE) showed compatible performance with biodiesel operation, while LHR engine showed improved performance at recommended injection timing of 27obTDC (before top dead centre) and recommended injector opening pressure of 190 bar. The performance of both version of the engine improved with advanced injection timing and at higher injector opening pressure when compared with CE with pure diesel operation. The optimum injection timing was 31obTDC for CE while it was 30obTDC with LHR engine with biodiesel operation.
Authors and Affiliations
T. Ratna Reddy| Research Scholar, Mechanical Engineering, Rayalaseema University, Karnool- 518 502, Andhra Pradesh, India, M. V. S. Murali Krishna| Mechanical Engineering Department, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad-500 075, Andhra Pradesh, India,, Ch. Kesava Reddy| Research Scholar, Mechanical Engineering, Rayalaseema University, Karnool- 518 502, Andhra Pradesh, India, P. V. K. Murthy*| Research Scholar, Mechanical Engineering, Rayalaseema University, Karnool- 518 502, Andhra Pradesh, India
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