Oxygen sensor installation structure

Abstract

The invention discloses a motorcycle exhaust pipe connecting piece and an oxygen sensor mounting structure with the motorcycle exhaust pipe connecting piece. The motorcycle exhaust pipe connecting piece comprises a connecting portion and a mounting portion fixing the connecting portion to a cylinder head. Bolt connecting holes are formed in the mounting portion, an exhaust passage is formed in the connecting portion, and an oxygen sensor mounting hole communicated with the exhaust passage is formed in the side wall of the connecting portion. The space position of the exhaust pipe connecting piece is reasonably utilized, the structure that in the traditional technology, an oxygen concentration sensor is arranged on the cylinder head or an exhaust pipe is abandoned, the bad effect caused by an independently-processed mounting component to the cylinder head or the exhaust pipe is avoided, the oxygen concentration sensor is made to be arranged at the position close to an exhaust outlet, and the signal and accuracy requirement of the oxygen concentration sensor is guaranteed.

Description

technical field [0001] The present invention relates to motorcycles, in particular to an oxygen sensor installation structure. Background technique [0002] The oxygen concentration sensor on the motorcycle is used to measure and feed back the oxygen content in the exhaust gas after engine combustion, so that the combustion can achieve the best air-fuel ratio and effectively reduce the components of carbon monoxide, hydrocarbons and nitrogen oxides in the exhaust gas . The oxygen concentration sensor is divided into heating type and non-heating type, and the heating type oxygen sensor is generally used because of its high price and complex structure, but the non-heating type must be installed at the high temperature of the exhaust gas. The position of the exhaust high temperature on the vehicle can be the cylinder head or the exhaust pipe close to the cylinder head. If the oxygen concentration sensor is installed on the cylinder head, the installation component must be proc...

AI Technical Summary

Problems solved by technology

The oxygen concentration sensor is divided into heating type and non-heating type, and the heating type oxygen sensor is generally used because of its high price and complex structure, but the non-heating type must be installed at the high temperature of the exhaust gas. The position of the exhaust high temperature on the vehicle can be the cylinder head or the exhaust pipe close to the cylinder head. If the oxygen concentration sensor is installed on the cylinder head, the installation component must be processed on the cylinder head to reserve the installation position, which is very important for itself. For the already very complicated cylinder head, it will undoubtedly increase the manufacturing difficulty and production cost of the cylinder head. For this reason, there has been a structure in which the oxygen concentration sensor is arranged on the exhaust pipe of the muffler, such as Figure 1~3 As shown, the boss hole 11' must be processed on the exhaust pipe 1', the boss 2' is installed in the hole, and then the oxygen concentration sensor 3' is installed on the boss 2', which requires The boss hole 11' and the boss 2' of the installation component are independently processed on the pipe 1', which also increases the difficulty of manufacturing the exhaust pipe and has an adverse effect on the strength of the exhaust pipe. At the same time, the oxygen concentration sensor is far away from the cylinder head , which is not conducive to the signal feedback and accuracy requirements of the sensor; in addition, the oxygen concentration sensor is exposed on the exhaust pipe, and will be impacted by sand, water, etc. splashed by the front wheels, causing damage to the sensor. protection, increased cost

And the exhaust pipe connector that is used to connect the exhaust pipe to the cylinder head in the traditional technology includes a connecting part 7' and a mounting part 4' (that is, a flange structure) that are separately arranged, wherein the exhaust pipe 1 ' is fixed on The lower end of the connecting part 7', and the upper end of the connecting part 7' are inserted into the exhaust passage on the cylinder head 5', and the mounting part 4' is connected with the cylinder head 5' through the bolt 6' to limit the connecting part 7'. The function of the exhaust pipe connector of this structure is single, and the spatial position on the connector has not been reasonably and fully utilized.

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