International Journal of Research in Engineering and Applied Sciences
  • Year: 2015
  • Volume: 5
  • Issue: 3

Influence of injection timing on performance parameters of DI diesel engine with air gap insulation with linseed biodiesel

  • Author:
  • P. Shekar Babu, P.V. Krishna Murthy
  • Total Page Count: 13
  • Page Number: 38 to 50

*Mechanical Engineering Department, Vijaya Krishsna Institute of Technology

**Sagar Group of Institutions, Chevella, Ranga Reddy District -501503, Telangana State, India Shamshabad, Ranga Reddy-500 075, Telangana State, India

Online published on 20 July, 2015.

Abstract

Investigations were carried out to study evaluate the performance of a medium grade low heat rejection (LHR) diesel engine consisting of air gap insulated piston with superni (an alloy of nickel) crown and air gap insulated liner with superni insert with different operating conditions [normal temperature and pre– heated temperature] of linseed biodiesel with varied injection timing. Performance parameters of brake thermal efficiency, exhaust gas temperature, volumetric efficiency and coolant load were evaluated at different values of brake mean effective pressure (BMEP) of the engine. Comparative studies were made with conventional engine (CE) with biodiesel and also with mineral diesel operation with similar working condition. The optimum injection timing was 31o bTDC (before top dead centre) with conventional engine while it was 29o bTDC for engine with LHR combustion chamber with biodiesel operation. Performance improved with engine with LHR combustion chamber with biodiesel in comparison with CE.

Keywords

Crude vegetable oil, biodiesel, exhaust emissions, LHR combustion chamber