FIELD: machine building.
SUBSTANCE: invention relates to engine building, namely, to evaluation of vacuum drive. Method of diagnostics of vacuum drive (75, 77) includes the following steps: indicate degradation of vacuum drive (75, 77) proceeding from estimation of air flow rate to vacuum tank (158) and from vacuum tank (158). Evaluation is performed proceeding from air flow generated by each fan (20) of inlet system, from activation of vacuum drive (75, 77) and from leakage during activation of vacuum drive (75, 77). Also disclosed is embodiment of diagnostics method of vacuum drive and diagnostics system of vacuum drive.
EFFECT: technical result consists in reduction of number of diagnostics errors of vacuum drive degradation.
19 cl, 7 dwg
