Hydrogen and oxygen (HHO) gas influence on engine characteristics while fueled on petrol ant bioethanol lean mixtures

Abstract

As ecological requirements getting stricter and the new manners of decreasing emissions of pollutants are being researched. One of them is to focus the usage none or small count of carbon fuels as a fuel for internal combustion engine. Therefore, usage perspective of bioethanol with HHO gas as an additive fuel to petrol lean mixtures, is presented in this research. Ecological (CO, CO2, HC, NOx) and energetic (MB, Bf, BTE) parameters were measured when using petrol ant bioethanol mixtures (E10 and E70) enriched with HHO gas. Experimentation was done by using spark ignition engine changing the ignition timing from 16° to 42° BTDC and changing stoichiometric mixture (λ = 1.0) to a lean (λ = 1.1; 1.2; 1.3; 1.4). Hydrogen and oxygen gases are produced using mobile electrolysis unit – HHO gas generator. It was concluded that for all air / fuel ratios tested the maximum torque was reached with 70% bioethanol additive to petrol, HHO gas has positive effect when mixtures are lean. The NOX emission has increased; however, CO, CH and CO2 were lower when HHO was supplied.