Automobile brake booster vacuum degree sensor and pressure intensity difference detection method and preparation method thereof

Abstract

The invention is suitable for the field of vacuum degree detection, and provides an automobile brake booster vacuum degree sensor comprising a first chamber, a second chamber and a third chamber, wherein the first chamber is communicated with the second chamber through an airflow channel, and the second chamber is electrically connected with the third chamber through a PIN pin; a PCB which is connected with the side wall of the second chamber in a sealing way; a membrane, a pressure sensor and a sealing washer which are arranged below the PCB in a compressing way, wherein the sealing washer, the pressure sensor and the PCB are respectively provided with a first through hole, a second through hole and a third through hole, the sealing washer and the convex airflow channel are cooperativelyfixed on the bottom part of the second chamber through the first through hole, the second through hole, the third through hole and the airflow channel are arranged on the same straight line, and the membrane is arranged on the connecting part of the second through hole and the third through hole; and a cover plate which is arranged on the PCB, wherein the cover plate is provided with a fourth through hole, and the internal side of the fourth through hole is provided with a waterproof ventilated membrane. The pressure sensor SMT is arranged on the PCB to form the PCBA, the conventional gluing mode is changed and effective sealing of the chip and the manifold can be guaranteed through interference preloading of the PCBA and the sealing washer.

Description

technical field [0001] The invention belongs to the technical field of intake manifold vacuum degree detection, and provides an automobile brake booster vacuum degree sensor, a pressure difference detection method and a preparation method. Background technique [0002] Existing new energy vehicles collect the vacuum degree information in the intake manifold of the vehicle in real time through the vacuum degree sensor, convert the collected data information into a voltage signal and feed it back to the ECU, and the ECU controls the vacuum pump to adjust the vacuum degree in the vacuum tube of the vehicle, thus ensuring Effort-saving and safe braking; [0003] However, the PCB board in the existing automobile brake booster vacuum sensor is potted with a single-component resin glue, which easily leads to PCB board failure. Contents of the invention [0004] An embodiment of the present invention provides an automobile brake booster vacuum sensor, which aims to solve the prob...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an automobile brake booster vacuum sensor, which aims to solve the problem that the PCB board in the automotive brake booster vacuum sensor is potted with a single-component resin glue, which easily leads to PCB board failure.

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