Automotive

A crystal oscillator, also known as a quartz crystal oscillator, is an electronic component that uses the inverse piezoelectric effect to generate precise frequency signals. With its high stability and low electromagnetic radiation characteristics, it plays a vital role in automotive electronic systems. The following is a detailed introduction to the application of crystal oscillators in automotive electronics:

Ⅰ. Provide stable clock signal

Crystal oscillators can provide a stable and accurate clock signal source for automotive electronic systems, which is the basis for the normal operation of automotive electronic systems. Whether it is the engine control unit (ECU), navigation system, audio and video system, or the communication module inside the vehicle, the clock signal provided by the crystal oscillator is required to ensure the accuracy and synchronization of operation.

Ⅱ. Specific application areas

1. Engine control unit (ECU)

Crystal oscillators play a key role in ECU, providing stable clock signals and frequency references for fuel injection, ignition systems, and emission control, ensuring precise control of the engine.

2. Navigation system

Crystal oscillators provide high-precision clock signals in vehicle-mounted GPS navigation systems to ensure navigation accuracy and reliability. The high stability and precision of automotive-grade crystal oscillators enable the navigation system to accurately reflect the vehicle's position in real time and provide reliable navigation information.

3. Audio and video systems

Crystal oscillators provide precise timing control and synchronization signals for car audio and video systems to achieve high-quality audio and video playback. This enhances the user's audio-visual experience.

4. Internal vehicle communication modules

Such as CAN bus and LN bus, rely on stable clock signals to ensure the reliability and real-time performance of data transmission. Crystal oscillators provide high-precision clock signals for these communication modules to ensure smooth communication between various systems within the vehicle.

5. Advanced Driver Assistance System (ADAS)

ADAS systems require highly synchronized sensors and control units to ensure the accuracy and reliability of autonomous driving functions. Crystal oscillators provide accurate clock synchronization to support various functions of ADAS systems, such as automatic braking, adaptive cruise control, and lane keeping assist, thereby improving vehicle safety and driving comfort.

6. New energy vehicle electronic system

In new energy vehicles, crystal oscillators are also widely used. They are used in key components such as electric drive systems and battery management systems (BMS). By generating stable clock signals, they synchronize the operation of key components such as motor batteries and inverters, thereby improving energy utilization. Especially in BMS systems, crystal oscillators are often used in current acquisition modules to provide accurate clock signals for the system.

Ⅲ. Positive impact on new energy vehicles

With the promotion of electric vehicles and intelligent concepts, the demand for on-board crystal oscillators is also increasing. Crystal oscillators play a vital role in new energy vehicles, not only improving the stability and reliability of the system, but also indirectly having a positive impact on the range of new energy vehicles. By optimizing energy utilization and ensuring efficient operation of the system, crystal oscillators help new energy vehicles achieve more efficient and environmentally friendly travel.

Ⅳ. Characteristics and requirements of automotive-grade crystal oscillators

Automotive-grade crystal oscillators are specially designed for automotive electronic systems, with characteristics such as wide temperature operating range, high stability, high precision and anti-interference. In the operating temperature range of -40℃~+85℃C (or wider), automotive-grade crystal oscillators can maintain normal working performance. At the same time, they also need to meet the requirements of automotive electronic systems for high reliability, long life and adaptability to harsh environments.

In summary, the application of crystal oscillators in automotive electronics is very extensive and important. It provides stable clock signals and frequency references for automotive electronic systems, ensuring the normal operation and stable performance of the system. With the continuous improvement of the degree of automotive electronics and the vigorous development of the new energy vehicle market, the application prospects of crystal oscillators will be broader.