Evaluation of exhaust gas emission for agricultural tractors based on actual operations

The current method used to evaluate the exhaust gas emission produced by agricultural machines was designed for off-road vehicles, but it was not designed for the actual operating conditions of agricultural machinery. In this report, a new evaluating method of the exhaust gas emission was proposed using a survey data of actual tractor operations with tractor implements and compared to the current method. The actual exhaust gas emission maps were obtained for eight types of tractors and compared. As a result, a different amount of exhaust gas emissions (CO, HC, NOx) was detected by using the new test method as compared to the current evaluation method.