During the development and testing stage of diesel engine, the matching performance of piston, piston ring and cylinder was usually evaluated by the blow-by. By studying the measurement mechanism of AVL442 blow-by meter, it was found that there was significant difference between the actual temperature and pressure and the reference ones achieved by blow-by meter measurement, which would affect the accurate measurement of blow-by to a certain extent. Automatic correction method of blow-by measurement was hence put forward. The temperature and pressure of blow-by gas were measured before passing through the meter, then blow-by correction algorithm was configured based on the LAM acquisition and formula editing of bench data acquisition system, and the automatic correction was hence conducted during the measurement of blow-by. Accordingly, the correlation between the bench and test equipment was improved, and the accuracy of blow-by measurement was also improved.
LIU Jie
,
CHEN Chuang
,
XIE Jun
,
DONG Hongxia
,
WANG Yu
,
LI Chuang
. Automatic Correction Method of Blow By Measurement on Diesel Engine Bench[J]. Vehicle Engine, 2024
, 0(3)
: 88
-92
.
DOI: 10.3969/j.issn.1001-2222.2024.03.014
