Control method and system for reducing carbon deposition of gasoline particulate filter of direct injection engine and computer readable storage medium

Abstract

The invention provides a control method for reducing carbon deposition of a gasoline particulate filter of a direct injection engine, which comprises the following steps that: firstly, an engine control unit acquires relevant characteristic signals of a whole vehicle and an engine in real time, and the characteristic signals comprise an engine coolant temperature signal; then, the engine control unit carries out processing based on the received cooling liquid temperature signal to obtain operation time T, and within the time T, the engine control unit executes an oil injection strategy 2 beneficial to carbon accumulation of a gasoline particulate filter (GPF); and finally, when the engine control unit judges that the operation time of the engine exceeds the operation time T, an oil injection strategy 1 beneficial to engine oil dilution is executed. The invention further provides a control system for reducing the carbon deposition of the gasoline particulate filter of the direct injection engine and a computer readable storage medium. On the basis of an oil injection strategy, carbon accumulation of the gasoline particulate filter (GPF) is effectively reduced under the condition that the engine oil dilution performance is guaranteed, and the two performance of engine oil dilution and carbon accumulation of the gasoline particulate filter (GPF) can be considered.

Description

Technical field [0001] The present invention belongs to the automotive engine management system (EMS) control technology, which specifically relates to control of carbon-accumulated carbon gasoline particles captain (GPF). Background technique [0002] In 2016, my country released the latest emission standards of "Light Auto Pollutants Emission Limits and Measurement Methods (China Sixth Phase)", tighten the emission limit of gaseous pollutants in the exhaust gas, for the engine's particulate matter quality and number of particulate matter Limited, the limit is 3.0 mg / km and 6.0e + 11 # / km, respectively. In the face of strict particulate emission limits, gasoline particles capture (GPF) is an effective treatment technology that reduces particulate matter to meet the national emission standards. In the future, more and more models will be mounted to gasoline particles captain (GPF). [0003] Gasoline particles collectors are generally integrated in the muffler assembly, arrang...

AI Technical Summary

Problems solved by technology

At present, the commonly used fuel injection strategy has only a single mode, which tends to dilute the performance of the engine oil, but it is extremely unfavorable for the carbon accumulation of the gasoline particulate filter (GPF), and it is easy to cause the gasoline particulate filter (GPF) to be blocked.

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