With the development of electronic technology, automotive electronics increased degree of the normal mechanical systems have been difficult to resolve some of the functional requirements of the auto-related issues, and the electronic control system was replaced. Sensor is the role of measurement in accordance with the provisions of the size, provide a useful, quantitative output signal components, That is, the optical sensor, time, electricity, temperature, pressure and gas, such as physical, chemical conversion of the signal converter. Sensor as a motor control system, the key components, which directly affects the vehicle's technical performances of the play. At present, about ordinary car with only 10-20 sensors, luxury cars are more advanced, these sensors are mainly located in the engine control systems, chassis control systems and body control system.
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