The ECU is the brain of the car. Its function is to calculate the driving conditions of the vehicle through various sensors, thereby controlling many parameters such as the engine's ignition, air-fuel ratio, idle speed, exhaust gas recirculation, etc. Its waterproofness is very important to consumers and manufacturers.

If the ECU is not waterproof, it is easy for water vapor to enter the car's ECU, causing the internal components to corrode and the vehicle to be unable to operate normally.Therefore, manufacturers will conduct waterproof testing of automotive ECUs, and traditional waterproof testing methods often cause secondary losses to automotive ECUs.Hiraysi has also conducted in-depth research on the waterproofness testing of automotive ECUs, and has now developed and put into use a waterproofness tester specifically designed to test automotive ECUs.Today we will take a look at one of the cases.

1. Appearance display of automotive ECU

1. The shape of this car ECU is an irregular rectangular parallelepiped, with two convex modules on both sides, and two irregular convex connection ports on the long side;

2. It is composed of a microprocessor, memory, input and output interfaces, analog-to-digital converters, shaping, driving and other integrated circuits, and is wrapped in a waterproof shell material. This is not good for waterproof detection, and accurate waterproof detection cannot be performed by calculating gas leakage;

2. Breakthrough in Difficulties in Waterproof Testing of Automotive ECUs

  Faced with this situation, Hirays specially used tooling specifically designed to detect automotive ECUs. First, the automotive ECU and the tooling were fixed and gas was injected. This maintained the air circulation inside and outside the casing while also ensuring the sealing of the casing.This avoids contamination by external water vapor, oil, moisture and solid pollutants during detection, and also ensures the reliability of the detection results.

(Automotive ECU waterproofness detection scene diagram)

At this time, after the tooling connected to the mold is started, a certain volume of gas is injected into the mold through the air source. When the detected air pressure is reached, the air supply is automatically cut off and the air tightness detection system enters the pressure stabilization stage. The Hirays Technology air tightness detection system will monitor the air pressure in the mold and determine the tightness based on the amount of leakage.

3. Automotive ECU waterproofness tester display and parameters

1. High-sensitivity pressure sensing and adjustment unit, combined with advanced differential pressure software algorithm, the minimum resolution can reach 0.1Pa. This algorithm has obtained a national patent.

2. Patented technology independently developed by Hirays,"IVT pneumatic sealing valve island", greatly improving the test accuracy, ensuring the stability of the instrument, and the inflation speed is also greatly improved.

3. Multiple test functions: The instrument integrates two pressure forms, positive and negative, and 8 test methods: two pressure forms and five test methods can be programmed into more than 20 test functions.

4. It has more than 200 groups of subroutines. Each group of subroutines can be programmed independently, single selected and combined to meet various complex testing requirements.

5. Full-touch large-screen intelligent operating system, graphical UI design based on the detection process, the operation interface is simple and clear, easy to teach and learn.

6. A variety of pressure adjustment components and ranges are optional, with a wide air pressure range (-80KPA&-1MPa) optional.The optional electronic pressure regulating valve can realize multiple sets of pressure sequential tests.

7. Multiple communication interfaces: built-in RS232 serial port, RJ45 network port, USB communication interface, LTP external I/O control port, supporting multiple communication protocols.

8. Optional barcode scanning function and printer are available to facilitate product data management and quality traceability. The instrument history record can reach up to 200,000 items and can be exported to the computer in batches.

9. The standard volume identification function can automatically identify the volume of the sample to be tested, and measure and judge the leakage rate in a volumetric manner.

10. Ultra-high stability and ease of use have passed the rigorous test of the market.

11. A variety of accessories are available, including inflatable bypass, quick connector, and standard leak hole. At the same time, the instrument supports third-party calibration and can issue a calibration report.

The copyright belongs to Hirays Technology. Reprinting and counterfeit originality are prohibited. Any violation will be at your own risk.