阅读说明：本技术 尾气温度传感器 (Exhaust gas temperature sensor ) 是由 陈超伟 于 2019-09-25 设计创作，主要内容包括：本发明公开的是尾气温度传感器,包括插头,电缆,感温探头,其特征在于,感温探头包括不锈钢外壳以及相互连接芯线和温度芯片,外壳的主体部填充有镁粉,外壳末端填充有耐高温导热胶水,温度芯片设于外壳末端由胶水进行固定,芯线设有S型缓冲区,芯线与温度芯片之间采用6端点点焊引脚,外壳末端充满耐高温导热胶水对芯片进行固定,避免芯片连接处出现裂痕,并且可以使得尾气的温度能够第一时间传递给温度芯片,采用脉冲式6端点均匀的点焊引脚,提高焊接稳定性,防止传感器在高温下断裂,提高传感器使用寿命,芯线S型缓冲区结构的设计,在高温加热及热障冷缩过程中,以及车辆行驶颠簸时起缓冲作用,芯线不容易被拉断。(Disclosed by the invention is exhaust gas temperature sensor, including plug, cable, temperature-sensing probe, it is characterized in that, temperature-sensing probe includes stainless steel casing and interconnection core wire and chip temperature, the main part of shell is filled with magnesium powder, casing ends are filled with thermostable heat-conductive glue, chip temperature is set to casing ends and is fixed by glue, core wire is equipped with S type buffer area, 6 endpoint spot welding pins are used between core wire and chip temperature, casing ends are fixed chip full of thermostable heat-conductive glue, chip junction is avoided slight crack occur, and the temperature of tail gas can be enabled to pass to chip temperature at the first time, using the uniform spot welding pin of 6 endpoint of pulsed, improve welding stability, sensor is prevented to be broken at high temperature, improve sensor service life, the design of core wire S type buffering plot structure, high-temperature heating and It is worked as a buffer in thermal boundary contraction and when vehicle driving is jolted, core wire is not easy to be pulled off.)

1. exhaust gas temperature sensor, including plug, cable and temperature-sensing probe, pass through cable between the temperature-sensing probe and plug Line connection, which is characterized in that the temperature-sensing probe includes stainless steel casing and core wire interconnected and chip temperature, described The main part of shell is filled with magnesium powder, and the casing ends are filled with thermostable heat-conductive glue, and the chip temperature is set to shell End is fixed by glue, and the core wire is equipped with S type buffer area, and 6 endpoint spot welding are used between the core wire and chip temperature Pin.

Technical field

The present invention relates to sensors, in particular to vehicle exhaust temperature sensor.

Background technique

Continue to increase with the development of the automobile industry with car ownership, automobile brings to the daily production of people and life Great convenience, and internal combustion engine is still the important method of energy conversion at present, fuel burning can leave harmful residue (example Such as soot, particle, PM), for this purpose, country has promulgated very strict engine exhaust emission standard, promote engineers not The disconnected discharge amount for reducing internal combustion engine particulates emission object.

Exhaust gas temperature sensor refers to the sensor that can be experienced temperature and be converted into usable output signal.Vehicle exhaust is vapour The exhaust gas generated when vehicle use, containing hundreds of different compound, pollutant therein has solid aerosol, an oxidation Carbon, carbon dioxide, hydrocarbon, oxynitrides, lead and oxygen sulfur compound etc..The temperature for being mounted on vehicle exhaust pipe end passes Sensor is used to monitor the temperature of vehicle exhaust, and the temperature of the exhaust gas of engine discharge is 800~900 degree, under such high temperature, generally Temperature sensor in thermal resistance the tolerance degree of high temperature is often not achieved, in the case where continuous work service life compared with It is low, and resistance can increase as the temperature rises, and sensing accuracy will substantially reduce, and the junction of electric wire and chip also can It is not fixed firmly because long-time is in the condition of high temperature, the service life of sensor is caused to substantially reduce.

Summary of the invention

In view of the deficiencies of the prior art, the present invention provides a kind of exhaust gas temperature sensors, solve high warm transmitting Technical problem, and the connection of chip and core wire is reinforced, it is effectively prevented sensor and is broken at high temperature, improve sensor and use Service life.

To achieve the above object, the present invention is achieved by the following technical programs: exhaust gas temperature sensor, including is inserted Head, cable and temperature-sensing probe are connected between the temperature-sensing probe and plug by cable, which is characterized in that the temperature-sensitive Probe includes stainless steel casing and core wire interconnected and chip temperature, and the main part of the shell is filled with magnesium powder, institute Casing ends are stated filled with thermostable heat-conductive glue, the chip temperature is set to casing ends and is fixed by glue, the core Line is equipped with S type buffer area, and 6 endpoint spot welding pins are used between the core wire and chip temperature.

The beneficial effects of the present invention are:

One, casing ends are fixed chip full of thermostable heat-conductive glue, and chip junction is avoided slight crack occur, extend and produce The service life of product, and the temperature of tail gas can be enabled to pass to chip temperature at the first time, solve high warm transmitting Technical problem；

Two, traditional die pin welding is connected using eclipsed form spot welding, is welded only one endpoint, be cannot ensure that product quality is steady Qualitative, the present invention uses the uniform spot welding pin of 6 endpoint of pulsed, improves welding stability, prevents sensor from breaking at high temperature It splits, improves sensor service life；

Three, the design of core wire S type buffering plot structure, in high-temperature heating and thermal boundary contraction and when vehicle driving is jolted It works as a buffer, core wire is not easy to be pulled off.

Detailed description of the invention

Fig. 1 is schematic structural view of the invention；

Fig. 2 is temperature-sensing probe enlarged drawing in Fig. 1；

Fig. 3 is A-A cross-sectional view in Fig. 1.

Specific embodiment

As shown in Figure 1, exhaust gas temperature sensor, including plug 1, cable 3 and temperature-sensing probe 2,2 He of temperature-sensing probe It is connected between plug 1 by cable 3, as shown in Fig. 2, the temperature-sensing probe 2 includes stainless steel casing 21 and is connected with each other Core wire 22 and chip temperature 23, the stainless steel casing 21 use stainless steel 310S shell, and the main part of the shell 21 is filled There is magnesium powder 24,21 end of shell is filled with thermostable heat-conductive glue 25, and the glue 25 is superpower viscous using aluminum oxide The organic glue of power, the chip temperature 23 are set to 21 end of shell and are fixed by glue 25, and glue can consolidate chip temperature It is fixed secured, and glue is full of casing ends, prevents casing ends from having air, and glue has good thermal conductivity, so that tail The temperature of gas can pass to chip at the first time.

As shown in Fig. 2, the core wire 22 is equipped with S type buffer area 221, in high-temperature heating and process of expansion and contraction, S type is slow It rushes the reserved core wire in area and plays the role of buffering, can prevent core wire from breaking.

As shown in figure 3, using 6 endpoint spot welding pins 26 between the core wire 22 and chip temperature 23, improves welding and stablize Property, it prevents sensor to be broken at high temperature, improves sensor service life.