Protection method, device, storage medium and vehicle for aftertreatment system of diesel engine

Abstract

The disclosure relates to a method, device, storage medium and vehicle for protecting a diesel engine aftertreatment system, belonging to the field of diesel engine aftertreatment. The method includes: obtaining the inside of the particle filter when the diesel engine is in regeneration mode temperature; compare the internal temperature with a preset temperature threshold to obtain a first comparison result; determine whether to control the vehicle to enter the protection mode according to the first comparison result; and / or, when the diesel engine is not in the regeneration mode , obtaining the outlet temperature of the oxidation catalyst of the diesel engine; comparing the outlet temperature with a pre-calibrated temperature MAP to obtain a second comparison result; determining whether to control the vehicle to enter a protection mode according to the second comparison result; Wherein, the temperature MAP is a three-dimensional stereogram calibrated according to the test with the rotational speed of the diesel engine, the fuel injection quantity 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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