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A trigger method and device for engine dpf passive regeneration, diesel engine and diesel locomotive
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A passive regeneration and DPF technology, which is applied to engine components, combustion engines, machines/engines, etc., can solve the problems of short active regeneration period, poor passive regeneration effect of DPF, fast carbon deposition, etc., and achieve reasonable and effective thermal management.
Active Publication Date: 2021-10-08
WEICHAI POWER CO LTD
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Problems solved by technology
[0004] In order to solve the poor passive regeneration effect of DPF in the prior art, fast carbon deposition, and short active regeneration cycle, and the thermal management strategy of the existing technology cannot effectively solve the above-mentioned technology of poor passive regeneration effect, fast carbon deposition, and short active regeneration cycle of the DPF question
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Embodiment 1
[0036] Such as figure 1 As shown, the present disclosure provides a method for triggering passive regeneration of an engine DPF, including:
[0037] S1: measure the DPF upstream temperature in real time and obtain the DPF normal mode temperature, wherein the value of the DPF normal mode temperature is equal to the value of the DPF upstream temperature obtained by real-time measurement;
[0038] S2: Obtain the weighting coefficient according to the corresponding relationship of the measured DPF inlet temperature on the weighting coefficient correction table;
[0039] S3: performing weighted calculation on the DPF inlet temperature and time according to the weighting coefficient to obtain a weighted temperature;
[0040] S4: When the weighted temperature is less than the preset DPF temperature threshold and the time is greater than or equal to the preset time threshold, start the DPF thermal management system.
[0041] Wherein, the weighting coefficient correction table is a n...
Embodiment 2
[0063] Such as figure 2 As shown, the present disclosure also provides an engine DPF passive regeneration trigger device, including:
[0064] The temperature measurement module 100 is used to measure the upstream temperature of the DPF in real time and obtain the normal mode temperature of the DPF;
[0065] The weighting coefficient acquisition module 200 is used to obtain the weighting coefficient according to the corresponding relationship of the measured DPF inlet temperature on the weighting coefficient correction table;
[0066] A calculation module 300, configured to perform weighted calculation on the DPF inlet temperature and time according to the weighting coefficient to obtain a weighted temperature;
[0067] A judging module 400, configured to start the DPF thermal management system when the weighted temperature is less than a preset DPF temperature threshold and the time is greater than or equal to a preset time threshold.
[0068] Specifically, the calculation ...
Embodiment 3
[0075] The present disclosure also provides a diesel engine, which implements the steps of the above-mentioned method for triggering passive regeneration of the engine DPF.
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Abstract
The disclosure provides a method and device for triggering passive regeneration of an engine DPF, a diesel engine and a diesel locomotive. The method includes: measuring the temperature upstream of the DPF in real time and obtaining the temperature in the normal mode of the DPF; correcting the temperature in the weighting coefficient according to the measured temperature upstream of the DPF The corresponding relationship on the table obtains the weighting coefficient; according to the weighting coefficient, the DPF inlet temperature and time are weighted and calculated to obtain the weighted temperature; when the weighted temperature is less than the preset DPF temperature threshold and the time is greater than or equal to the preset time threshold, Activate the DPF thermal management system. Aiming at the technical problems existing in the prior art, this disclosure innovatively proposes to calculate the post-processing weighted temperature within a period of time, assigning a higher weighting coefficient to the area with high temperature, and assigning a lower weighting coefficient to the area with low temperature, that is When the weighted temperature within a period of time is less than the threshold, a thermal management request is triggered to perform thermal management more reasonably and effectively.
Description
technical field [0001] The present disclosure relates to the technical field of mechanical control, and more specifically, the present disclosure relates to a method and device for triggering passive regeneration of an engine DPF, a diesel engine and a diesel locomotive. Background technique [0002] At present, non-road fourth-stage diesel engines use after-treatment devices with DPF (Diesel Particulate Filter Diesel Particulate Filter). However, due to the characteristics of operating conditions in market segments such as harvesters, road rollers, and tractors, there are problems such as poor passive regeneration effect of DPF, fast carbon deposition, and short active regeneration cycle. [0003] At present, the existing thermal management strategy is to judge whether the average temperature of post-processing within a period of time is lower than a threshold to trigger the thermal management requirement. However, the actual working conditions of the tractor are complex, ...
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