METHOD (EMBODIMENTS) AND COMPRESSOR RECIRCULATION VALVE DEFECT DETECTION SYSTEM Russian patent published in 2020 - IPC F02B37/16 F02D23/00 

FIELD: internal combustion engines.

SUBSTANCE: invention can be used in the internal combustion engines. Method for engine comprises indication of deterioration of compressor recirculation valve state, based on adaptation of surge line on compressor characteristics map. Compressor characteristics map is stored in the engine controller. Information on adaptation of surging line is obtained during one or more driving cycles. Obtaining information on adaptation of surging line provides obtaining information on range of adaptations of surging line, including left boundary of surging line and right border surging line. Based on offset of surging line at adaptation to right side from right boundary of surging line it is determined that value of opening of recirculation valve of compressor is less than required value. Based on offset of surging line at adaptation to left side from left border of surging line it is determined that value of opening of recirculation valve of compressor exceeds required value.

EFFECT: technical result consists in improvement of running characteristics of vehicle due to increased accuracy of determination of fault recirculation valve of compressor.

12 cl, 6 dwg