Method of increasing exhaust gas purification efficiency of automobile

摘要

The present invention relates to the exhaust gas reduction of a six-cylinder engine and calculates the difference between signals fed back from the oxygen sensors of the odd cylinders (1, 3, 5) and the even cylinders (2, 4, It is determined that the abnormality has occurred and the feedback correction is made to a value obtained by averaging the signals of the two oxygen sensors to increase the purification efficiency of the exhaust gas and to check whether the oxygen sensor feedback control is in the activated state A first step of judging A second step of reading a signal of each oxygen sensor and comparing and judging the error if it is determined that feedback control is possible in the first step; A third step of calculating signals of the two oxygen sensors as an average value when the error is determined to be equal to or greater than the set value in the second step; And a fourth step of using a signal of an oxygen sensor output as an average value in the third step for feedback correction.