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Method and system for fan control in vehicle regeneration mode
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A technology of fan control and mode, applied in electrical control, engine control, fuel injection control, etc., to ensure normal jumping, avoid noise and fuel consumption
Active Publication Date: 2022-06-28
WEICHAI POWER CO LTD
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[0005] In view of the above deficiencies, the technical problem to be solved by the present invention is to provide a method and system for controlling the fan in the regeneration mode of the vehicle, and effectively avoid the noise and fuel consumption caused by the single control mode of the fan by adding the condition that the fan is fully turned on in the regeneration mode question
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Embodiment 1
[0048] like figure 1 and figure 2 As shown, a method for controlling a fan in a vehicle regeneration mode includes the following steps:
[0049] Step S1, obtaining the engine running state;
[0050] Step S2, judging whether the engine running state is the Lof regeneration stage or the Dry regeneration stage;
[0051] Step S3, if yes, start the Lof regeneration stage timing or Dry regeneration stage timing, and obtain the fan type;
[0052] Step S4, judging whether the fan type is controlled;
[0053] Step S5, if it is controlled, obtain the fan fully-on condition in the regeneration mode;
[0054] Step S6, judging whether the fan fully open condition matches the preset condition;
[0055] Step S7, if it matches, control the fan to switch from the normal opening degree to the full opening in the regeneration mode.
[0056] After the method of the invention is adopted, when the engine runs to the Lof regeneration stage or the Dry regeneration stage, the state of the fan i...
Embodiment 2
[0080] like image 3 As shown, a fan control system in a vehicle regeneration mode includes an electronic control unit, and a state detection unit, which is electrically connected to the electronic control unit, respectively. The state detection unit is used to determine whether the engine running state is in the Lof regeneration stage or in the dry regeneration stage. stage, if yes, start the Lof regeneration stage timing or Dry regeneration stage timing; fan type detection unit, the fan type detection unit is used to determine whether the fan is controlled; the fan fully open condition detection unit, the fan fully open condition detection unit is used to determine the fan Whether the full-on condition is met; the execution unit, the execution unit is used to control the fan to switch from the normal opening to the fully-on state in the regeneration mode.
[0081] like image 3 As shown in the figure, the system also includes: a preset unit electrically connected to the ele...
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Abstract
The invention discloses a fan control method and system in the vehicle regeneration mode, and relates to the field of engines. The invention judges whether the engine is running in the Lof regeneration stage or the Dry regeneration stage by acquiring the engine running state; if it is running in the Lof or Dry stage , start the timing of the Lof regeneration stage or the Dry regeneration stage, and then judge whether the fan type is controlled. If it is controlled, obtain the fan full-on condition in the regeneration mode, and judge whether the fan full-on condition matches the preset condition; if it matches, Control the fan from normal opening to fully open in regeneration mode to increase the exhaust temperature and ensure the normal jump of the regeneration stage. It can be seen that the fan control method and system in the vehicle regeneration mode of the present invention can effectively avoid the noise and fuel consumption problems caused by the single control mode of the fan by adding the condition that the fan is fully turned on in the regeneration mode.
Description
technical field [0001] The invention relates to the technical field of engines, and in particular, to a method and system for controlling a fan in a vehicle regeneration mode. Background technique [0002] DPF (diesel particulate filter) is one of the key components added to the National VI engine. When the carbon load reaches a certain amount (4g / l), it is necessary to eliminate the soot (soot) in the DPF through parking regeneration. The regeneration process is divided into four stages. The main function of the first two stages (Lof and Dry) is to increase the exhaust temperature, and whether the first two stages can jump normally is related to the success or failure of the regeneration process. Lof is the adsorption stage, and Dry is the Warming stage. [0003] Considering the differences in the matching between OEMs (the length of the exhaust pipe, whether the exhaust pipe is surrounded by thermal insulation cotton, etc.), there are problems such as slow rise in exhaust...
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