Port Injection of Hydrogen Gas in Direct Injection Diesel Engine using DEE as Ignition Enhancer

Abstract— Over the past two decades considerable effort has
been taken to develop and introduce new alternate source of
energy for the conventional gasoline and diesel. Environmental
pollution and uncertainty in cost of petroleum products are the
principal driving forces for this movement. The major
pollutants from an Diesel engine system are NOx, Smoke,
particulate matter, Soot. Several alternative fuels were tried
but all of them are carbon based fuels, therefore net carbon
based pollutants cannot be reduced. One alternative to carbonbased fuels is hydrogen. Hydrogen a non-carbon fuel only can
meet zero emission vehicles standards in future. Hydrogen can
be commercially used as a fuel even though it is having a
number of technical and economical barriers. Numerous
techniques are available for use in C.I. engine such as dual fuel
made, by using spark plug, glow plug, DEE as an ignition
enhancer. Hydrogen was used in a diesel engine in the dual fuel
mode-using diesel as an ignition source in neat form using
DEE. In neat form the DEE was introduced in the manifold. In
order to have a precise control of hydrogen flow and to avoid the backfire and pre – ignition problems hydrogen was
injection in to intake manifold; DEE injection follows the
hydrogen injection. DEE mixed with air and flows into the
combustion chamber as DEE auto ignites first followed by
hydrogen combustion. A single cylinder-four stroke watercooled naturally aspirated constant speed D.I. diesel engine with a rated output of 3.7 kW at 1500 rpm was used for the experimental purpose. Measurements were taken with respect to the performance, combustion and emission studies.