| dc.description.abstract | The utilization of fossil fuels as the primary source of energy in daily human
life has led to the depletion of fossil energy resources, particularly crude oil. The
scarcity of crude oil results in a shortage of oil-based fuels, significantly impacting
the transportation sector. Consequently, many countries, especially automotive
companies, are actively seeking ways to develop energy-efficient vehicles for fuel
conservation. Team Horas USU has undertaken efforts to address the challenge of
developing efficient vehicles through the application of a velocity stack intake in the
Urban Diesel Team Horas USU vehicle. The velocity stack intake is a trumpet-shaped
component with varying lengths installed to facilitate the entry of air into the internal
combustion engine system. This research aims to analyze the performance of the diesel
engine in the Urban Diesel Team Horas USU vehicle. Parameters used to assess the
performance include torque, power (Brake power), air-fuel ratio, specific fuel
consumption, and thermal efficiency (Brake Thermal efficiency). The maximum torque
obtained from the dynotest results is 8.4 Nm at an engine speed of 1000 rpm using a
velocity stack component with a radius of 30 mm. The maximum power obtained from
the dynotest is 2.245 KW, generated by an engine equipped with a velocity stack with
a radius of 30 mm at speeds of 3330 and 3500 rpm. The highest air-fuel ratio
determined from the dynotest is 20.788 with a velocity stack radius of 30 mm at an
engine speed of 1400 rpm. The highest thermal efficiency observed in this testing is in
the engine equipped with a velocity stack intake with a radius of 30 mm, reaching
37.95% at engine speeds of 3300 and 3500 rpm | en_US |
