METHOD OF ICE INJECTION ADVANCE ANGLE (IAA) DETERMINATION AND DEVICE TO THIS END Russian patent published in 2015 - IPC G01M15/05 F02D41/00 

FIELD: engines and pumps.

SUBSTANCE: invention can be used in operation of ICEs. Proposed method is based on measurements. These include engine rpm measurements at appearance of derivatives peaks by rpm of autocorrelation function ACF or acceleration power spectrum of accelerations, mean in an acceleration cycle. Shifts in time of mutual autocorrelation function peak (MACF) of said accelerations and run out relative to the peak of run out ACF are measured. Inclination of phase-frequency characteristic of mutual power spectrum of said accelerations is measured. At determination of IAA in separated cylinders, this method proceeds from rpm measurement at appearance of the peaks for rpm derivatives of said mean accelerations. Besides, it proceeds from time shift of acceleration ACF peaks or full load at working stroke of every cylinder relative to TDC. Besides, it proceeds from the peaks of acceleration MACF and run out at working stroke relative to those of ACF and run out and from inclination of phase-frequency characteristic of mutual power spectrum of said accelerations. In the case of ICE with unbalanced harmonic, used is, similarly, the shift of relative unbalanced harmonic of acceleration. Proposed device comprises rpm and first cylinder TDC transducers, differentiators, signal and peak registration units, angular mark count start timing unit, measurement frequency, angular mark cycle and number masters, rpm and acceleration averaging units, level selector, correlation meters, power spectrum meter, two peak meters, two IAA determination gadgets and PFC meters.

EFFECT: simplified process, lower labour input, higher precision.

9 cl, 11 dwg