Smoke dust content model value establishing method and system of gasoline particle filter

Abstract

The invention provides a smoke dust content model value establishing method and system of a gasoline particle filter. The smoke dust content model value establishing method of the gasoline particle filter comprises the following steps that measuring is carried out on a rack or a rotating hub of an engine to obtain an original smoke dust emission value; the smoke dust combustion rate is obtained through measurement of an engine sensor, and the smoke dust combustion rate is multiplied by the combustion time to obtain the combustion amount; the original smoke dust emission value is subtracted from the combustion amount and integrated to obtain a smoke dust content model value; the amount of oxygen consumed by smoke combustion is measured, and according to the amount of the oxygen consumed bysmoke combustion and combining with a physical model of the oxygen consumed by combustion, a smoke dust content measured value is obtained; and the smoke dust content measured value is compared with the smoke dust content model value, and the smoke dust content model value is corrected according to the smoke dust content measured value.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a method and system for establishing a smoke content model value of a gasoline particulate filter. Background technique [0002] In automobile engines, internal purification measures such as improving the injection method (such as PDI dual injection, PFI high-pressure injection, etc.), optimizing engine calibration, etc. can ensure that the engine PN emission meets the current CN6B regulations. However, when the engine is aging or the regulations are tightened, these measures Emissions requirements may not be met, such as engine deposits, more aggressive driving cycles, or RDEs that include cold engine emissions. The particulate filter (GPF) of a gasoline engine is a particulate matter trapping device for a gasoline engine. Its basic principle is to capture particulate matter in the exhaust gas (such as figure 1 As shown), the capture efficiency can reach 60-90%, so G...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method and system for establishing a soot content model value of a gasoline particulate filter, so as to solve the problem of burning the particulate filter or affecting fuel consumption and drivability caused by an incorrect soot content model

Images