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Self-adaptive control method and device for dpf regeneration heat protection of diesel engine
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An adaptive control and DPF technology, applied in the direction of exhaust device, muffler device, and electronic control of exhaust gas treatment device. effect of regeneration
Active Publication Date: 2019-09-17
DONGFENG COMML VEHICLE CO LTD
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[0005] The purpose of the present invention is to provide a diesel engine DPF regeneration heat protection auto- Adaptive control method and device
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specific Embodiment 1
[0021] Specific embodiment one, see figure 2 , a diesel engine DPF regeneration heat protection adaptive control method is used to solve the problem that the DPF internal carrier is not burned during the regeneration process, comprising the following steps:
[0022] Step 1: Obtain the exhaust gas mass flow signal, the differential pressure signal across the DPF, the DOC inlet temperature signal, the DPF inlet temperature signal, and the DPF outlet temperature signal.
[0023] Step 2: Identify the capture amount information of particles in the DPF, set the target temperature of the DPF inlet during regeneration, and determine whether the active regeneration function of the DPF is enabled; if the active regeneration function is enabled, perform step 3; if the active regeneration function is not enabled, return to step two.
[0024] Step 3. Determine whether the interrupt trigger condition is met. If the interrupt trigger condition is met, issue a fuel injection prohibition com...
specific Embodiment 2
[0037] see figure 1 , an adaptive control device for diesel engine DPF regeneration heat protection, including a signal acquisition module, a feed-forward fuel quantity demand module, a closed-loop control module, a command conversion module, a fuel injection execution module and an adaptive protection module.
[0038] The signal acquisition module is used to acquire the exhaust gas mass flow signal, the differential pressure signal across the DPF, the DOC inlet temperature signal, the DPF inlet temperature signal and the DPF outlet temperature signal.
[0039] The feed-forward oil quantity demand module is used to identify the trapping quantity information of particles in the DPF, set the target temperature of the DPF inlet during regeneration, judge whether the active regeneration function of the DPF is turned on, and calculate and output the required base oil quantity information.
[0040] The self-adaptive protection module is used to judge whether the interrupt trigger co...
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Abstract
The invention discloses a regenerated heat protection self-adaption control method and device for a diesel engine DPF (diesel particulate filter). The method comprehensively considers factors influencing regeneration temperature rise. Under the condition that the regeneration function is not influenced, the optimized design of the regeneration target temperature is conducted so that the reasonableoil-injection quantity can be guaranteed; and meanwhile, the front feed fundamental oil quantity and the closed-loop control amendment oil quantity are reasonably limited. The device comprises a signal collection module, a front feed oil quantity demand module, a closed-loop control module, an instruction conversion module, an oil injection execution module and a self-adaption protecting module.By means of the regenerated heat protection self-adaption control method and device for the diesel engine DPF, the risk that a carrier is burnt to be cracked in the regeneration temperature rise process of the DPF is reduced; and the risk that the regeneration temperature is raised rapidly due to the excessively-high oil injection quantity, so that the DPF carrier is burnt to be cracked is prevented.
Description
technical field [0001] The present invention relates to a regeneration heat protection adaptive control method and device, more specifically to a diesel engine DPF regeneration heat protection adaptive control method and device, belonging to the technical field of diesel engine DPF regeneration control. Background technique [0002] While the diesel engine brings convenience to people, it also brings serious environmental pollution problems. In order to deal with the problem of environmental pollution, countries have introduced increasingly stringent motor vehicle emission regulations, which makes particulate matter after-treatment technology an important technical means for diesel vehicle emission control. At present, the use of diesel particulate filter (diesel particulate filter, DPF) is considered to be the most effective means to solve the problem of diesel particulate emissions. It mainly filters and captures particulates in diesel exhaust gas through diffusion, deposi...
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