Experimental investigation on the performance and exhaust gas composition of a representative, domestic compact passenger car engine have been conducted under various loads and speeds conditions. The engine brake loads tested were W.O.T., 75%, 50%, 25%, and no load.
At each brake load the engine rpm were changed from 1,000 to 5,500 rpm with 500 rpm increments.
From performance tests necessary data have been obtained to calculate Bhp, Bmep, Bsfc and AF ratio. Also, compositions of exhaust gas were identified with the use of gas chromatograph and $NO_x$ analyzer. The gas compositions covered by this test were $CO, CO_2, N_2, O_2, H_2, CH_4, NO$ and $NO_x$.
It is noticeable from the data analysis that AF ratio was too high for a good fuel economy throughout the engine operating conditions. Also, some data seemed to imply that the fuel distribution among cylinders might not be uniform.
