Judgment method for carbon carrying amount of DPF
A technology of DPF and carbon loading, which is applied in the diagnosis device of exhaust gas treatment device, electronic control of exhaust gas treatment device, exhaust gas treatment and other directions to achieve the effect of accurate calculation
Active Publication Date: 2018-05-29
NANJING IKAKAT EMISSIONS TECH CO LTD
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is the deficiency of the prior art of the unit service, and a method for judging the carbon load of the DPF is provided. The CO2 concentration is measured based on the CO2 sensor, and the mass of carbon consumed in the DPF is calculated through the measured concentration, and the carbon load is measured by the sensor. The concentration deviation is small, which can accurately calculate the carbon load consumed in the DPF, judge the remaining carbon load in the DPF, and provide reliable reference parameters for the active regeneration program of the DPF regeneration
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[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] The oxidation catalytic technology of particles (Diesel Oxidation Catalysis, DOC) is to coat noble metal catalysts (such as Pt, etc.) The substance can be oxidized with the oxygen in the tail gas at a lower temperature and finally converted into CO2 and H2O. Oxidation catalytic converter does not need regeneration system and control device, has the characteristics of simple structure and good reliability, and has been applied in modern small engines.
[0025] The particle capture technology (Diesel Particulate Filter, DPF) mainly filters and traps particles in the engine exhaust through diffusion, deposition and impact mechanisms. When the exhaust gas flows through the trap, the particles are trapped in the filter element of the filter body, and the cleaner exhaust gas is discharged into the atmosphere. At present, the wall-f...
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The invention discloses a judgment method for a carbon carrying amount of a DPF. The judgment method comprises the following steps: a. calculating a soot transient emission amount; b. calculating a CO2 transient emission amount; c. comparing the value of integration for a CO2 emission mass with the value detected by a CO2 sensor; d. obtaining a carbon consumption amount; e. educing the carbon carrying amount of the DPF; f. if the carbon carrying amount of the DPF, which is obtained in the step e, exceeds a set value, starting a DOC diesel oil forward-injection program; and g. if the consistency of the value of integration for the CO2 emission mass and the value detected by the CO2 sensor in the step c does not meet requirements, detaching and examining a catalytic carrier of the DPF. According to the judgment method for the carbon carrying amount of the DPF, the mass of carbon consumed in the DPF is calculated through the measured concentration; and the concentration measured through the sensor is low in deviation, so that the carbon carrying amount consumed in the DPF can be accurately calculated, the remainder carbon carrying amount in the DPF is judged, and reliable reference parameters are provided for an active regeneration program of regeneration of the DPF.
Description
technical field [0001] The invention relates to the technical field of automobile tail gas treatment, in particular to a method for judging the carbon load of a DPF. Background technique [0002] The exhaust particulate matter of the engine mainly contains three components: unburned soot (Soot), organic soluble matter (Soluble organic fractions, SOF) adsorbed on the surface and sulfate, among which the particulate matter is mostly composed of carbon and carbide composed of tiny particles. [0003] A DPF is a particulate filter installed in the exhaust system of a diesel engine, which traps particulate matter from the exhaust before it enters the atmosphere. DPF particle capture technology is a better way to reduce particulate matter in the exhaust. When the engine exhaust flows through the filter, the particulate matter in the exhaust gas is captured by the filter through interception, diffusion, gravity settlement and inertial collision. Efficiency is mainly affected by f...
Claims
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Login to View More IPC IPC(8): F01N11/00F01N3/023
CPCF01N3/023F01N11/00F01N2560/022Y02T10/40
Inventor 唐蛟曹庆和许玲玲
Owner NANJING IKAKAT EMISSIONS TECH CO LTD