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The automotive encoder is a device used to measure rotation speed and linear motion. It determines the engine speed and vehicle speed through non-contact methods such as trigger signals and time signals. It is an indispensable component of the vehicle control system and ensures engine efficiency and working safety.
The automotive encoder not only provides instant engine speed and vehicle speed data, but also helps the vehicle control system improve efficiency and optimize performance. The specific functions are as follows:
Measure vehicle speed: Calculate vehicle speed by measuring tire speed to help drivers perform corresponding operations as needed.
Calculate estimated distance: Based on the determination of rotation speed and vehicle speed, use mathematical formulas and algorithms to calculate the distance the car is traveling.
Adjust Transmission ratio: adjusts the transmission ratio of various devices such as gearbox, transmission shaft, drive shaft, etc. according to the vehicle speed.
Auxiliary brake: helps the electronic control unit adjust the braking force to maintain the stability and safety of the vehicle when running at high speed.
Speed sensor: uses the output signal of the encoder to determine the vehicle's driving speed, which is very useful for controlling the vehicle speed under various driving conditions.
Engine management system: provides relevant data to adjust parameters such as ignition timing, injection time and oil-gas mixture ratio according to demand.
Braking system: helps the vehicle braking system adjust the braking force to ensure stability and safety when the vehicle is driving
Cruise control: used in cruise control systems to keep the vehicle's driving speed always within a predetermined range Inside.
The crystal oscillator plays a key role in the automotive electrical encoder. The encoder is a device used to measure and record physical movement, such as rotation angle, speed, etc. As the clock source of the encoder, the crystal oscillator provides a stable clock signal to ensure accurate measurement and recording of the encoder. In the automotive electrical encoder, the role of the crystal oscillator includes: providing an accurate clock signal to ensure that the encoder can measure and record physical movement at accurate time intervals. This is very important for the operation and control of the vehicle system.
In the project requirements of the automotive electrical encoder, the XC7KO-114-50M of the YXC passive automotive resonator YSX211SC series is recommended. The following is XC7KO Typical parameters of -114-50M:
1. 50MHz automotive quartz crystal resonator, total frequency difference within ±80PPM, the material belongs to the product series 2016 size, YSX211SC supports 16MHz-72MHz wide frequency range;
2. Passed AEC-Q200/IATF16949 dual certification, independent quality control, and meets the high-difficulty test of dual 85;
3. Automotive-grade crystal oscillators are widely used in automotive electronic processors such as automotive encoders, sensors, and receivers;
YXC automotive resonator YSX211SC, nominal frequency 50MHZ, with 8PF load capacitance, room temperature frequency deviation ±10PPM, operating temperature -40~125℃, the following is the YSX211SC series specification.
