Diesel engine aftertreatment system protection method and device, storage medium and vehicle

Abstract

The invention relates to a diesel engine aftertreatment system protection method and device, a storage medium and a vehicle, and belongs to the field of diesel engine aftertreatment. The method comprises the steps that under the condition that a diesel engine is in a regeneration mode, the internal temperature of a particle catcher is obtained; the internal temperature is compared with a preset temperature threshold to obtain a first comparison result; whether to control the vehicle to enter a protection mode or not is determined according to the first comparison result; and / or, under the condition that the diesel engine is not in the regeneration mode, the outlet temperature of an oxidation catalyst of the diesel engine is obtained; the outlet temperature is compared with a pre-calibratedtemperature MAP to obtain a second comparison result; and whether to control the vehicle to enter a protection mode or not is determined according to the second comparison result; wherein the temperature MAP is a three-dimensional diagram which is calibrated according to a test and takes the rotating speed and the oil injection quantity of the diesel engine and the outlet temperature of the oxidation catalyst as parameters.

Description

technical field [0001] The present disclosure relates to the field of post-processing of diesel engines, and in particular, to a method, device, storage medium and vehicle for protecting a post-processing system of diesel engines. Background technique [0002] As the post-processing system becomes more and more complex, there are more and more components of the post-processing system, and its complex system structure leads to higher and higher requirements for the post-processing system on the working conditions of the diesel engine. In some working conditions, the temperature of the post-processing system is too high. The ablation failure of the carrier is caused, and the coated catalyst falls off, which damages the aftertreatment system. [0003] However, in related technologies, the hardware protection of the components of the aftertreatment system cannot be carried out, and if the diesel engine runs under abnormal working conditions and causes the aftertreatment to fail,...

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Problems solved by technology

[0002] As the post-processing system becomes more and more complex, there are more and more components of the post-processing system, and its complex system structure leads to higher and higher requirements for the post-processing system on the working conditions of the diesel engine. In some working conditions, the temperature of the post-processing system is too high. Lead to carrier ablation failure, coated catalyst peeling off and damage to the aftertreatment system

[0003] However, in related technologies, the hardware protection of the components of the aftertreatment system cannot be carried out, and if the diesel engine runs under abnormal working conditions and causes the aftertreatment to fail, it will cause irreversible damage to the hardware of the aftertreatment system of the diesel engine, resulting in unqualified emissions and Decline in vehicle power and economy

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