An oxygen sensor dew point detection device and detection method
An oxygen sensor and detection device technology, applied in the direction of material water content, etc., can solve the problems of complicated and long calibration process, inaccurate calibration results, etc., and achieve the effect of reducing open-loop control time, improving economy and emission.
Active Publication Date: 2018-11-13
WEICHAI XIGANG NEW ENERGY POWER
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Problems solved by technology
Due to the variety of engine configurations and working environments, the calibration process is extremely complicated and lengthy, and the calibration results are not accurate
Method used
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[0032] Below in conjunction with accompanying drawing and embodiment, further elaborate the present invention. In the following detailed description, certain exemplary embodiments of the invention are described by way of illustration only. Needless to say, those skilled in the art would realize that the described embodiments can be modified in various different ways, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
[0033] Such as figure 1 As shown, an oxygen sensor dew point detection device includes an oxygen sensor 21 installed on an exhaust pipe 1 and the sensing end extends into the interior of the exhaust pipe 1, and an oxygen sensor seat 22 is installed on the exhaust pipe 1 , the oxygen sensor 21 is installed on the oxygen sensor seat 22, and the exhaust pipe 1 adjacent to the oxygen sensor 21 is installed with a temperatur...
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The invention discloses an oxygen sensor dew point detection device and method. The device comprises an oxygen sensor and a temperature sensor, wherein the oxygen sensor is installed on an exhaust pipe, the sensing end of the oxygen sensor stretches into the exhaust pipe, the temperature sensor is close to the exhaust pipe of the oxygen sensor, and the sending end of the temperature sensor stretches into the exhaust pipe, the oxygen sensor is connected with a controller, and the data output end of the temperature sensor is connected with the controller; on the basis of detection of the temperature sensor, when the temperature of the oxygen sensor exceeds the certain value, the oxygen sensor works normally. Whether dew point detection is passed or not can be rapidly and accurately determined, whether the oxygen sensor can work normally or not can be rapidly and accurately determined, and no influence of engine configuration and working environment is caused; the open-loop control time from starting of a natural engine to normal work of the oxygen sensor can be shortened, and the economy and emission performance of the natural gas engine can be improved.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to an oxygen sensor dew point detection device and method. 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 exceeds a certain temperature (generally considered as the ...
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IPC IPC(8): G01N25/66
CPCG01N25/66
Inventor 李旭唐行辉
Owner WEICHAI XIGANG NEW ENERGY POWER