Oxygen-containing sensor equipment construction and locomotive equipped with the same

Abstract

The invention aims to provide an oxygen sensor assembly structure and an engine provided with such a structure. The structure is convenient for the assembly of other parts of the engine with the oxygen sensor, and is capable of lengthening the service life of the oxygen sensor, reducing the exhaust resistance, improving the performance of the engine, precisely controlling the fuel consumption, fully burning up the fuel in the engine, thus reducing exhaust emission. The oxygen sensor assembly structure of the invention comprises an expanding pipe and the oxygen sensor, wherein, the caliber of the expanding pipe is greater than the caliber of the exhaust pipes of the exhaust device, and the expanding pipe is not of the same body with the exhaust pipe. The lambda sensor is arranged on the expanding pipe, and the expanding pipe is arranged between and integrated with the exhaust pipe of the exhaust device.

Description

technical field [0001] The present invention relates to an installation structure of an oxygen sensor, in particular to an installation structure of an oxygen sensor used in a jet engine of a locomotive. Background technique [0002] In order to precisely control the air / fuel ratio, most injection engines are equipped with oxygen sensors to measure the oxygen content in the exhaust gas and transmit the oxygen content information to the computer. The oxygen sensor is generally installed between the exhaust pipe and the catalytic converter. The sensing part of the oxygen sensor is to sense the oxygen content in the exhaust gas. When the difference between the oxygen concentration inside and outside the sensing part becomes large, it will cause Voltage. [0003] After receiving the voltage signal from the oxygen sensor, the computer judges the current air-fuel ratio according to its voltage level, and controls the injector to correct the air-fuel ratio, so that the engine can ...

AI Technical Summary

Problems solved by technology

Therefore, the sensing part 64 in the exhaust pipe 62 becomes a kind of obstacle, and in the exhaust state, it will block the air flow, causing the flow velocity to slow down and the smoothness of the exhaust to decrease, resulting in a reduction in the power of the engine.

And when the air flow passes through the part where the cross-sectional area becomes smaller and reaches the part of the original cross-sectional area, the flow velocity will also change suddenly, so that the inside of the exhaust pipe 62 will cause abnormal noise and turbulent flow will be formed, which will affect the smoothness of the exhaust. Wait

Therefore, in the prior art, although the addition of the oxygen sensor 63 can make the fuel usage control more accurate, it will inevitably cause the problem that the engine performance will be affected and the maximum efficiency cannot be achieved.

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