DPF regeneration control method
A regenerative control and DPF technology, which is applied to the electronic control of exhaust treatment devices, machines/engines, mechanical equipment, etc., can solve the problems of high local peak temperature of DPF, damage of DPF carrier, and reduced reliability of DPF, so as to avoid Effect of high local peak temperature and improved safety
Active Publication Date: 2022-07-12
FAW JIEFANG AUTOMOTIVE CO
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[0004]
However, in practical applications, as the accumulation of carbon particles inside the DPF increases, the local peak temperature of the DPF may be higher during the regeneration process, resulting in damage to the DPF carrier and reducing the reliability of the DPF.
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[0025] The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the accompanying drawings only show some but not all of the parts related to the present invention.
[0026] In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. Fo...
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The invention relates to the technical field of internal combustion engine postprocessors, in particular to a DPF regeneration control method which comprises the steps that S1, the total heat Q generated in the boot combustion process in a DPF is calculated; s2, a DPF temperature model is established, the DPF temperature model is divided into i independent fragmentation units, a distribution coefficient ki is calibrated for each fragmentation unit, heat Qi generated by each fragmentation unit in the boot combustion process is equal to ki * Q, and k1 + k2 +... + ki = 1; s3, the carrier temperature Tcelli of each fragment unit is calculated, and the maximum value Tcellmax is determined; and S4, the maximum value Tcellmax is compared with a regeneration threshold value T ', if Tcellmax is smaller than T', the DPF enters a regeneration mode, if Tcellmax is larger than or equal to T ', the DFP enters a cooling mode, and when Tcellmax is smaller than T', the regeneration mode is recovered. According to the method, different distribution coefficients are calibrated for different fragmentation units, so that the carrier temperature of each fragmentation unit is determined, the DPF enters the regeneration mode only when the carrier temperature of each fragmentation unit is smaller than the regeneration threshold value, the situation that the local peak temperature of the DPF is high is avoided, and the safety of the DPF is improved.
Description
technical field [0001] The invention relates to the technical field of internal combustion engine post-processors, in particular to a DPF regeneration control method. Background technique [0002] With the upgrading of diesel engine emission technology, DPF (Diesel Particulate Filter, particle trap) technology can be used to filter out most of the soot and other PM particles in the exhaust, effectively reducing PM emissions and meeting the requirements of China VI emission regulations. [0003] However, with the increase of the running time of the internal combustion engine, the carbon particles captured by the DPF will increase, which will lead to the increase of the exhaust back pressure of the engine, the deterioration of the combustion in the cylinder, and the deterioration of the fuel consumption and emission, which will affect the power and fuel economy of the engine. After the accumulation of carbon particles reaches a certain amount, the DPF needs to be actively rege...
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Login to View More IPC IPC(8): F01N9/00
CPCF01N9/002Y02T10/40
Inventor 张艳辉张惠林福容陈粹文刘佳郭志刚
Owner FAW JIEFANG AUTOMOTIVE CO