METHOD OF DIAGNOSTICS OF AIR-AND-GAS CIRCUIT OF SUPERCHARGED INTERNAL COMBUSTION ENGINE Russian patent published in 1995 - IPC

FIELD: internal combustion engines. SUBSTANCE: preliminary test of engine in agreement with series of load characteristics is conducted by which numerical values of informative parameters within scope of characteristics permissible for long operational conditions are determined. Standard in the form of staged complex is plotted invariant relative to characteristics of power user which is converted to straight line-standard. Informative parameters are measured under arbitrary conditions in process of operation belonging to specified scope. Numerical values of left and right parts of staged complex are found and line is plotted by which spacing from standard actual condition of air-and-gas circuit is judged. In this case staged complex is plotted in the form of ...=1.0+1,0± (x₁ ба₁+ x₂ ба₂+x₃ ба₃+ ... +x_n ба_n),, where are relative values of informative parameters; ба₁; ба₂; ба₃ ... ба_n are relative errors of measurement of informative parameters and conversion of standard complex to straight line is accomplished by its presentation in the form of . EFFECT: increased authenticity of diagnostics.