Sulfur oxide detection device
A technology of sulfur oxides and detection devices, which is applied in the direction of measuring devices, exhaust devices, instruments, etc., can solve the problems of component deterioration, fuel economy deterioration, etc., and achieve the effect of improving detection accuracy
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no. 1 approach
[0061] First refer to Figure 1 to Figure 12 A first embodiment of the present invention will be described.
[0062]
[0063] figure 1 It is a diagram schematically showing an internal combustion engine using the sulfur oxide detection device (hereinafter referred to as "SOx detection device") according to the first embodiment of the present invention. figure 1 The internal combustion engine shown is a compression self-ignition internal combustion engine (diesel engine). The internal combustion engine is mounted, for example, on a vehicle.
[0064] refer to figure 1 , the internal combustion engine includes: an internal combustion engine main body 100 , a combustion chamber 2 for each cylinder, an electronically controlled fuel injection valve 3 for injecting fuel into the combustion chamber 2 , an intake manifold 4 and an exhaust manifold 5 . The intake manifold 4 is connected to an outlet of a compressor 7 a of a turbocharger (supercharger) 7 via an intake pipe 6 . An...
no. 2 approach
[0193] The configuration and control of the SOx detection device of the second embodiment are basically the same as the configuration and control of the SOx detection device of the first embodiment except for the points described below. Therefore, hereinafter, the second embodiment of the present invention will be described focusing on the parts different from the first embodiment.
[0194] Figure 13 It is a graph showing the relationship between the period of the voltage waveform and the inter-electrode current (maximum value) when a voltage is applied to the first electrochemical cell 51 with a sinusoidal voltage waveform varying between 0.3V and 1.1V. In the illustrated graph, the maximum value of the inter-electrode current is plotted when the period of the voltage waveform (sine wave) is the short period T1, the medium period Tm, and the long period Th. In addition, the longer the period of the voltage waveform is, the longer the time for which a voltage equal to or hig...
no. 3 approach
[0227] The structure and control of the SOx detection device of the third embodiment are basically the same as the structures and controls of the SOx detection device of the first and second embodiments except for the points described below. Therefore, in the following, the third embodiment of the present invention will be described focusing on the differences from the first embodiment and the second embodiment.
[0228] Figure 16 It is a schematic cross-sectional view showing the structure of the element unit 10' of the SOx detection device according to the third embodiment of the present invention. The SOx detection device of the third embodiment includes an element unit 10'. The element unit 10' has the same structure as the element unit 10 in the first embodiment and the second embodiment except that it includes the second electrochemical cell 52 in addition to the first electrochemical cell 51.
[0229] Such as Figure 16 As shown, the element portion 10' is formed by...
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