Emission Behavior of a CI Engine Running by Biodiesel under Transient Conditions

Belachew Tesfa, Rakesh Mishra, Fengshou Gu, Oliver Gilkes

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


The emission characteristics of compression ignition (CI) engines running on biodiesel during transient operating conditions, which is the most usual case in urban and extra-urban transportation, have rarely been investigated. In the present study an experimental investigation on emission characteristics of a CI engine has been carried out both under steady state and transient operating conditions. The experimental work has been carried out on CI engine, which is integrated with transient testing facility. This facility is capable of varying the engine speed and load over a given time period. To measure the engine emissions, an emission analyser has been used to measure CO2, CO, THC, and NOx emissions. The fuels used in the analyses are 25% (25B) and 100% (100B) of biodiesel blend and diesel. The series of the transient events studied are speed changes from 900 to 1200rpm, 1200 to 1500rpm and 1500 to 1800rpm over a time period of 4 seconds each. These tests were performed at a constant load of 105Nm, 210Nm, 315Nm and 420Nm. The transient test results have shown that the emissions of CI engine running on biodiesel were reduced by up to 17%, 52% and 38% for CO, CO2 and THC emissions respectively as compared to diesel fuel. However, the NOx emission was seen to be 17% higher for engine running on biodiesel than that on diesel during transient conditions.

Original languageEnglish
Article number2010-01-1280
Number of pages10
JournalSAE Technical Papers
Publication statusPublished - 12 Apr 2010
EventSAE 2010 World Congress and Exhibition - Detroit, United States
Duration: 13 Apr 201013 Apr 2010


Dive into the research topics of 'Emission Behavior of a CI Engine Running by Biodiesel under Transient Conditions'. Together they form a unique fingerprint.

Cite this