Abstract:
The objectives of this research were to study the performance and emissions of four-stroke diesel engines using biodiesel from Niger seed oil as fuel compared with diesel. The engine used in this test was a YANMAR TF 90 DIL. The engine test was conducted through the engine speed about 1200 to 2500 revolutions per minute (rpm) at full load condition. After that the engine power and brake specific fuel consumption were calculated by using the test data. Moreover, the emissions from the engine exhaust gas such as nitrogen oxide (NOX), carbon monoxide (CO) and hydrocarbon (HC) were measured by using the exhaust gas analyzer. The result showed that biodiesel from Niger seeds could be an alternative fuel for a small diesel engine because the engine torque and engine power of the engine using biodiesel from Niger seed oil were higher than diesel. However, the brake specific fuel consumption was also higher than diesel. Moreover, for the emissions, the amount of the nitrogen oxide (NOX), Carbon monoxide (CO), and Hydrocarbon (HC) of the engine using biodiesel from Niger seed oil were less than diesel.