Analysis of the Performance of the Liquid Cooling System on the Thermal Efficiency of Honda Vario 125 Motorcycle

Abstract

This study discusses the performance of the liquid cooling
system on the Honda Vario 125 motorcycle to understand its
effect on the thermal efficiency of the engine during operation.
The liquid cooling system plays a role in keeping the engine
temperature stable, so that the combustion process takes place
more effectively. The test was carried out by taking data on
cylinder head temperature, coolant temperature, and fuel
consumption at various engine rev levels. The data obtained is
analyzed to assess the ability of the cooling system to reduce
temperature rise and keep the engine at an optimal working
range. The results show that at medium to high cycles, liquid
cooling systems are able to maintain temperature stability with
relatively small fluctuations. These more stable thermal
conditions contribute to improved combustion efficiency which
is reflected in decreased specific fuel consumption and
increased thermal efficiency. These findings indicate that the
cooling system design on the Honda Vario 125 has adequate
capabilities to maintain consistent engine performance,
especially in daily use with load variations. This study can be a
technical reference in the development of motor vehicle
cooling systems.