EVALUATION OF THE EFFECT OF HYDROGEN GAS SUPPLEMENTATION ON GASOLINE ENGINES' POWER, FUEL CONSUMPTION, AND EMISSIONS

Abstract

The limited resources of fossil fuels and the increasing pollution from engine
exhaust have prompted researchers to focus on alternative fuels. One of the
practical solutions to improve combustion efficiency on current engines without
much change in engine structure is to add a small amount of Hydrogen gas or
Hydrogen-rich gas to the engine. Hydrogen has the characteristics of rapid
diffusion, flammability, and fast burning, so when ignited in a mixture with
traditional fossil fuels, it increases the combustion rate of the fuel mixture and
helps the fuel to burn out. Therefore, it increases the combustion process's
efficiency and reduces the engine's toxic emissions. This paper evaluates the
efficiency of a 4-stroke gasoline engine when adding hydrogen gas to the intake
manifold, with a research gasoline engine model built on AVL Boost software. The
results show that when adding Hydrogen gas to the engine, the engine power
decreases, the fuel consumption rate increases, CO and HC emissions decrease,
and NOx increases compared to gasoline fuel.