High-corrosion-resistance vehicle hybrid power system sensor chip

Abstract

The invention provides a high-corrosion-resistance vehicle hybrid power system sensor chip, and relates to the technical field of oxygen sensors, the high-corrosion-resistance vehicle hybrid power system sensor chip comprises: an oxygen sensor body, wherein an oxygen sensor chip is arranged in the oxygen sensor body; and a gas inlet protection device which is arranged at one end, close to the gas inlet end, of the oxygen sensor body and is communicated with the gas inlet end, wherein the gas inlet protection device comprises a waste gas filtering mechanism, the input end of the gas inlet protection device is connected with the output end of the gas inlet mechanism, and the waste gas filtering mechanism comprises a plurality of first crushing and grinding convex blocks which rotate, a plurality of first crushing and grinding convex blocks are uniformly distributed in the circumferential direction, and a second crushing and grinding convex block and a third crushing and grinding convex block are arranged in the rotation range of the first crushing and grinding convex blocks, so that the waste gas inlet amount of the oxygen sensor body can be increased, the detection precision of the oxygen sensor body is indirectly improved, and meanwhile, the waste gas is prevented from being in direct contact with the oxygen sensor chip, and corrosive substances in the to-be-detected waste gas are prevented from corroding the oxygen sensor chip.

Description

technical field [0001] The invention relates to the technical field of oxygen sensors, in particular to a highly corrosion-resistant vehicle hybrid system sensor chip. Background technique [0002] Car engines generally use three-way catalytic converters to reduce exhaust pollution. An oxygen sensor is an essential component. An oxygen sensor is installed in the exhaust pipe to detect the concentration of oxygen in the exhaust and send feedback to the central control element ECU Signal, and then the central control unit ECU controls the increase or decrease of the fuel injection quantity of the injector, so as to control the air-fuel ratio of the mixture near the theoretical value. The oxygen sensor is an important part of the fuel feedback control system of the automobile engine. It is the most important sensor in the electric fuel injection system of the automobile. The central control element ECU of the injection system is connected to control the air-fuel ratio in the e...

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Problems solved by technology

[0003] The oxygen sensors currently on the market have the following problems in the actual application process: 1. The air intake hole of the ordinary oxygen sensor is small, and when the exhaust gas generated by the car enters the interior of the oxygen sensor, the contact with the oxygen sensor chip The amount of gas is less, which will reduce the detection sensitivity of the oxygen sensor chip, and cannot accurately detect the degree of concentration and dilution of oxygen in the exhaust gas; 2. The oxygen sensor has only one protective cover, and the exhaust gas generated by the car during operation enters the protective cover After that, it will directly contact with the oxygen sensor chip, the corrosive substances contained in the exhaust gas will easily corrode the oxygen sensor chip, and the oxygen sensor chip is the core of the oxygen sensor, which will seriously affect the service life of the oxygen sensor

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