Vehicle fuel sulfur content monitoring method and device, equipment and storage medium

Abstract

The embodiments of the invention disclose a vehicle fuel sulfur content monitoring method and device, equipment and a storage medium, and aims to ensure that the conversion efficiency of the nitrogenoxide of a vehicle after-treatment system is not influenced by the sulfur content of the newly added fuel. The method comprises the steps: when it is monitored that a new fuel is added into a vehicle,the fording duration of the vehicle between the last time of refueling and the current time of refueling is detected; when the fording duration is less than the preset maximum fording duration, the current nitrogen oxide conversion rate of the vehicle, the state of urea stored in a urea box, the temperature of a selective catalytic reducer and the temperature difference between an inlet of an oxidation catalyst and an outlet of the oxidation catalyst are detected; and according to the detected current nitrogen oxide conversion rate of the vehicle, the state of the urea stored in the urea box,the temperature of the selective catalytic reducer and the temperature difference between the inlet of the oxidation catalyst and the outlet of the oxidation catalyst, whether the sulfur content of the vehicle fuel exceeds the standard is determined.

Description

technical field [0001] The embodiments of the present application relate to the technical field of diesel engine exhaust treatment, and in particular, to a method, device, equipment and storage medium for monitoring the sulfur content of vehicle fuel. Background technique [0002] With the continuous upgrading of automobile emission regulations, the diesel engine aftertreatment system for diesel engine exhaust treatment plays an increasingly important role. Existing diesel engine aftertreatment systems generally include an oxidation catalytic reduction device (DOC), a particulate filter (DPF), and a selective catalytic reduction device (SCR). The selective catalytic reduction device is coated with a catalyst-copper-based molecular sieve, The catalyst is a catalyst for the reduction reaction between the ammonia gas produced after the pyrolysis and hydrolysis of the urea solution for vehicles and the exhaust gas of the vehicle in the selective catalytic reducer, and is used to...

AI Technical Summary

Problems solved by technology

[0003] The existing problem is that when diesel oil with excessive sulfur content (sulfur content ≥ 50ppm) (ppm is the concentration unit, meaning parts per million concentration) is used for a long time, it will cause irreversible damage to the catalyst coated in the selective catalytic reduction device. damage, resulting in the nitrogen oxides in the vehicle exhaust not being treated, and the emissions exceeding the standard, the OBD system used to monitor vehicle exhaust emissions will give a fault alarm

However, in the prior art, there is no method or device for monitoring the sulfur content in the vehicle fuel oil

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