Dew point detection control method, device, controller and vehicle
A technology of detection control and dew point, which is applied in the fields of controllers, vehicles, devices, and dew point detection control methods, can solve the problems of opening the oxygen sensor detection in advance and accelerating the completion time of dew point detection, so as to speed up the normal heating time and dew point detection. Time, the effect of accelerating the evaporation of water
Active Publication Date: 2022-04-05
WEICHAI POWER CO LTD
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[0005] Embodiments of the present application provide a dew point detection control method, device, controller, and vehicle to overcome the inability to accelerate the dew point detection completion time in the prior art, and then enable the detection of the oxygen sensor in advance
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[0061]In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0062] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodimen...
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Embodiments of the present application provide a dew point detection control method, device, controller, and vehicle. The method includes: preheating the oxygen sensor after detecting that the engine is running, and determining the first energy corresponding to the preheated oxygen sensor ; At the same moment corresponding to the first energy, acquire the energy generated by the exhaust gas of the engine; determine whether the dew point detection is completed according to the first energy, the energy generated by the exhaust gas, and a preset threshold for dew point detection. The method provided in the embodiment of the present application can overcome the problem in the prior art that it is impossible to accelerate the completion time of the dew point detection, and thus start the detection of the oxygen sensor in advance.
Description
technical field [0001] The embodiments of the present application relate to the technical field of automobile safety, and in particular to a dew point detection control method, device, controller and vehicle. Background technique [0002] Natural gas engines typically use an oxygen sensor to measure the oxygen content in the tailpipe for closed-loop control. The core element of the oxygen sensor is a porous zirconia ceramic tube. The oxygen sensor needs to heat the zirconia ceramic tube to about 750-780°C when it is working. Because natural gas engine exhaust contains a lot of water vapor. When the natural gas engine is just started, the water vapor in the exhaust gas will condense into liquid water due to contact with the exhaust pipe in the low temperature state at this time. If liquid water splashes onto the ceramic tube, it will cause the ceramic tube to burst and damage the oxygen sensor. Therefore, when the temperature of the exhaust pipe near the oxygen sensor exc...
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IPC IPC(8): G01M15/10G01N25/66
CPCG01M15/104G01N25/66
Inventor 徐卫亮李云霞许帅秦翠萍
Owner WEICHAI POWER CO LTD