DPF active regeneration optimization method and control system thereof

Abstract

The invention discloses a DPF active regeneration optimization method and a control system thereof. On one hand, the DPF active regeneration optimization method is provided, an ECU conducts parking regeneration through control over engine running injection timing and fuel oil rail pressure, and the value generated by a parking regeneration signal generator for providing parking generation signals for the ECU serves as a parking regeneration signal; and when parking regeneration is conducted, the value generated by the parking regeneration signal generator is changed to reach the corresponding set value, then the corresponding set value is sent to the ECU, and the ECU is used for controlling engine running injection timing and fuel oil rail pressure to reach the value needed for the DPF regeneration work condition. On the other hand, the invention further provides the DPF active regeneration optimization control system. By means of the DPF active regeneration optimization method and the control system thereof, the DPF regeneration time can be shortened, the regeneration efficiency is improved, and regeneration oil consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of engine aftertreatment, in particular to a DPF active regeneration optimization method, and also relates to a DPF active regeneration optimization control system. Background technique [0002] At present, with the upgrading of national automobile emission regulations, the requirements for automobile exhaust emissions are becoming more and more stringent, which has caused various OEMs and engine manufacturers to upgrade their emission technology routes one after another. This makes DPF one of the must-haves for China VI diesel engine exhaust after-treatment technology. DPF, Diesel Particulate Filter, is a device installed in the exhaust system of a diesel vehicle to reduce particulate matter in the exhaust by filtering. Because the DPF filters out the particles in the exhaust gas of the diesel engine and deposits them in the filter element, the accumulated particles will gradually increase and gradually bl...

AI Technical Summary

Problems solved by technology

However, it is difficult for the engine to reach the above temperature under normal driving conditions, so the current passive regeneration is generally designed with a parking regeneration function, thus forming a parking active regeneration, the regeneration working condition of the parking active regeneration The fuel injection timing and fuel rail pressure are consistent with those under driving conditions, so it is impossible to adjust the fuel injection timing and fuel rail pressure to the values ​​that are most conducive to the rapid rise of exhaust temperature, and there are no other measures to achieve a rapid increase in exhaust temperature , so the exhaust temperature rises too slowly

Because the exhaust temperature rises slowly and the regeneration time is long, the regeneration mode is time-consuming, fuel-intensive and inefficient

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