CN207036759U - A kind of automotive oxygen sensor - Google Patents

Abstract

The utility model discloses a kind of automotive oxygen sensor, including sensor holder and sleeve, connection protection pipe on the left of the sensor holder, the inside of the protection pipe is provided with ceramic probe, the inside of the sensor holder is provided with contact pins, the right side of the contact pins is provided with heating rod, the right side connection contacting metal silk of the heating rod, the right side connection protective case of the sensor holder, left side inside the protective case is provided with upper insulating bushing, the lower insulating bushing of right side connection of the upper insulating bushing, the right side of the protective case is provided with butterfly pad, connection sleeve pipe inside the butterfly pad, the right side connection barrier post of described sleeve pipe, the right side connection screw thread set of the barrier post, the right side connection power line of the thread bush, the power line is fixedly connected in the sleeve.The sensor can effectively control motor vehicle exhaust emission, the adequacy for reducing automobile environmental pollution, improving automobile engine fuel oil burning quality and burning.

Description

A kind of automotive oxygen sensor

Technical field

A kind of sensor technical field is the utility model is related to, specially a kind of automotive oxygen sensor.

Background technology

At present, existing lambda sensor is also there is the place of some shortcomings, such as；Existing lambda sensor was using Control intensity in journey to automobile engine fuel oil is smaller, so causing the discharge capacity of vehicle exhaust bigger, so as to cause The pollution of environment, and often electrostatic is influenceed existing lambda sensor in by external environment, so as to cause sensor to lose Spirit, influence the accuracy of sensor.

Utility model content

The technical problems to be solved in the utility model is the defects of overcoming prior art, there is provided a kind of automotive oxygen sensor, The sensor can effectively control motor vehicle exhaust emission, reduce automobile environmental pollution, improve automobile engine fuel oil burning matter Amount and the adequacy of burning.By the design of upper insulating bushing and lower insulating bushing, it can effectively isolate extraneous static to contact The influence of wire, it is therefore prevented that sensor is influenceed by external environment, so as to cause faulty sensor, improves the essence of sensor True property.

To solve the above problems, the utility model provides following technical scheme：A kind of automotive oxygen sensor, including sensor Seat and sleeve, the sensor holder left side connection protection pipe, the inside of the protection pipe is provided with ceramic probe, the sensor The inside of seat is provided with contact pins, and the right side of the contact pins is provided with heating rod, the right side connection contact gold of the heating rod Belong to silk, the right side connection protective case of the sensor holder, the left side inside the protective case is provided with upper insulating bushing, described exhausted The lower insulating bushing of right side connection of edge bushing, the right side of the protective case are provided with butterfly pad, connected inside the butterfly pad Sleeve pipe, the right side connection barrier post of described sleeve pipe, the right side connection screw thread set of the barrier post, the right side connection of the thread bush Power line, the power line are fixedly connected in the sleeve.

As a kind of preferred embodiment of the present utility model, the protection pipe is fixedly connected on a left side for the sensor holder End, the ceramic probe is fixedly connected on the inside of the protection pipe, and is fixedly connected with the left end of the contact pins, institute State the middle that contact pins are fixedly connected on inside the sensor holder.

As a kind of preferred embodiment of the present utility model, the protective case is fixedly connected on the right side of the sensor holder End, the left end of the heating rod are fixedly connected on the right-hand member of the contact pins, and the right-hand member of the heating rod is fixedly connected described Contacting metal silk.

As a kind of preferred embodiment of the present utility model, the upper insulating bushing is fixedly connected in the protective case The left side in portion, and it is located at the right side inside the protective case positioned at the upper and lower ends of the heating rod, the lower insulating bushing, And positioned at the both sides up and down of the heating rod and contacting metal silk, the butterfly pad is fixedly connected on the right side of the protective case Port goes out.

As a kind of preferred embodiment of the present utility model, described sleeve pipe is movably connected in inside the butterfly pad, The barrier post is fixedly connected on the right-hand member of described sleeve pipe, and the thread bush is fixedly connected on the right-hand member of the barrier post, described Power line is fixedly connected on the inside on the right side of the thread bush.

Compared with prior art, the beneficial effects of the utility model are as follows：

1st, a kind of automotive oxygen sensor of the utility model, the sensor can effectively control motor vehicle exhaust emission, reduce vapour Car environmental pollution, the adequacy for improving automobile engine fuel oil burning quality and burning.

2nd, a kind of automotive oxygen sensor of the utility model, can be effective by the design of upper insulating bushing and lower insulating bushing Isolation extraneous static to contact wire influence, it is therefore prevented that sensor is influenceed by external environment, so as to cause sensor Failure, improve the accuracy of sensor.

Brief description of the drawings

Fig. 1 is a kind of sectional view of automotive oxygen sensor of the utility model；

Fig. 2 is the front view of the utility model sleeve.

In figure：1- sensor holders, 2- sleeves, 3- protection pipes, 4- ceramics probes, 5- contact pins, 6- heating rods, 7- connect Touch wire, 8- protective cases, the upper insulating bushings of 9-, insulating bushing under 10-, 11- butterfly pads, 12- sleeve pipes, 13- barrier posts, 14- thread bush, 15- power lines.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe.

Fig. 1-2 is referred to, the utility model provides a kind of technical scheme：A kind of automotive oxygen sensor, including sensor holder 1 With sleeve 2, the left side of the sensor holder 1 connection protection pipe 3, the inside of the protection pipe 3 is provided with ceramic probe 4, the biography The inside of sensor seat 1 is provided with contact pins 5, and the right side of the contact pins 5 is provided with heating rod 6, and the right side of the heating rod 6 connects Connect contacting metal silk 7, the right side connection protective case 8 of the sensor holder 1, the left side inside the protective case 8 is provided with upper insulation Bushing 9, the lower insulating bushing 10 of right side connection of the upper insulating bushing 9, the right side of the protective case 8 are provided with butterfly pad 11, The inside connection sleeve pipe 12 of butterfly pad 11, the right side connection barrier post 13 of described sleeve pipe 12, the right side of the barrier post 13 Connection screw thread set 14, the right side connection power line 15 of the thread bush 14, the power line 15 are fixedly connected on the sleeve 2 In.

The protection pipe 3 is fixedly connected on the left end of the sensor holder 1, and the ceramic probe 4 is fixedly connected on described The inside of protection pipe 3, and be fixedly connected with the left end of the contact pins 5, the contact pins 5 are fixedly connected on the biography Middle inside sensor seat 1, its role is to effectively allow sensor to carry out detecing side, improve the easy to use of sensor Property.

The protective case 8 is fixedly connected on the right-hand member of the sensor holder 1, and the left end of the heating rod 6 is fixedly connected on The right-hand member of the contact pins 5, the right-hand member of the heating rod 6 are fixedly connected with the contacting metal silk 7, and its role is to improve Protective effect to sensor, improve the induction of contact pins 5.

The upper insulating bushing 9 is fixedly connected on the left side inside the protective case 8, and positioned at the heating rod 6 Upper and lower ends, the lower insulating bushing 10 are located at the right side inside the protective case 8, and positioned at the heating rod 6 and contact The both sides up and down of wire 7, the right output port that the butterfly pad 11 is fixedly connected on the protective case 8 go out, and its role is to energy Influence of the effective isolation extraneous static to contact wire 7, it is therefore prevented that sensor is influenceed by external environment, so as to cause to pass Sensor failure, improve the accuracy of sensor.

Described sleeve pipe 12 is movably connected in inside the butterfly pad 11, and the barrier post 13 is fixedly connected on described sleeve pipe 12 right-hand member, the thread bush 14 are fixedly connected on the right-hand member of the barrier post 13, and the power line 15 is fixedly connected on described The inside on the right side of thread bush 14, its role is to effectively raise the electric conductivity of sensor, strengthens the flexibility ratio of sensor.

Operation principle：Under certain condition, potential difference can be produced using the difference in oxygen concentration inside and outside zirconium oxide, and it is dense Degree difference is bigger, and potential difference is bigger.Oxygen content is about 21% in air, actually not oxygen-containing in the waste gas after rich mixture burning, The waste gas that is generated after lean combustion or because containing more oxygen in waste gas caused by misfire, but still fewer than the oxygen in air It is more.Under the catalysis of high temperature and platinum, electronegative oxonium ion absorption is on the surfaces externally and internally of Zirconia ferrule, due in air Oxygen is more than the oxygen in waste gas, and side is communicated with air on sleeve pipe 12 and adsorbs more anions than waste gas side, both sides from The concentration difference of son produces electromotive force.When the oxygen concentration of vehicle casing tube waste gas side is low, one is produced between electrode of oxygen sensor Individual high voltage (0.6~1V), this voltage signal are sent to automobile ECU enhanced processing, and high voltage signal is regarded as dense mixing by ECU Gas, and low voltage signal is regarded as lean mixture.

Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, although ginseng The utility model is described in detail according to previous embodiment, for those skilled in the art, it still can be with Technical scheme described in foregoing embodiments is modified, or equivalent substitution is carried out to which part technical characteristic.It is all Within the spirit and principles of the utility model, any modification, equivalent substitution and improvements made etc., this practicality should be included in Within new protection domain.

Claims (5)

1. a kind of automotive oxygen sensor, including sensor holder（1）And sleeve（2）, it is characterised in that：The sensor holder（1） Left side connects protection pipe（3）, the protection pipe（3）Inside be provided with ceramic probe（4）, the sensor holder（1）Inside set There are contact pins（5）, the contact pins（5）Right side be provided with heating rod（6）, the heating rod（6）Right side connection contact Wire（7）, the sensor holder（1）Right side connection protective case（8）, the protective case（8）Internal left side is provided with upper exhausted Edge bushing（9）, the upper insulating bushing（9）The lower insulating bushing of right side connection（10）, the protective case（8）Right side be provided with butterfly Shape pad（11）, the butterfly pad（11）Internal connection sleeve pipe（12）, described sleeve pipe（12）Right side connection barrier post（13）, The barrier post（13）Right side connection screw thread set（14）, the thread bush（14）Right side connection power line（15）, the electricity Source line（15）It is fixedly connected on the sleeve（2）In.

A kind of 2. automotive oxygen sensor according to claim 1, it is characterised in that：The protection pipe（3）It is fixedly connected on The sensor holder（1）Left end, the ceramic probe（4）It is fixedly connected on the protection pipe（3）Inside, and with it is described Contact pins（5）Left end be fixedly connected, the contact pins（5）It is fixedly connected on the sensor holder（1）Internal centre Place.

A kind of 3. automotive oxygen sensor according to claim 1, it is characterised in that：The protective case（8）It is fixedly connected on The sensor holder（1）Right-hand member, the heating rod（6）Left end be fixedly connected on the contact pins（5）Right-hand member, it is described Heating rod（6）Right-hand member be fixedly connected with the contacting metal silk（7）.

A kind of 4. automotive oxygen sensor according to claim 1, it is characterised in that：The upper insulating bushing（9）It is fixed to connect It is connected on the protective case（8）Internal left side, and it is located at the heating rod（6）Upper and lower ends, the lower insulating bushing （10）Positioned at the protective case（8）Internal right side, and it is located at the heating rod（6）With contacting metal silk（7）Up and down two Side, the butterfly pad（11）It is fixedly connected on the protective case（8）Right output port go out.

A kind of 5. automotive oxygen sensor according to claim 1, it is characterised in that：Described sleeve pipe（12）It is movably connected in institute State butterfly pad（11）Inside, the barrier post（13）It is fixedly connected on described sleeve pipe（12）Right-hand member, the thread bush（14） It is fixedly connected on the barrier post（13）Right-hand member, the power line（15）It is fixedly connected on the thread bush（14）Right side it is interior Portion.