Suitable for Volkswagen Audi common rail pressure sensor 06J906051D

Development history editor

In the 1960s, there were only oil pressure sensors, oil quantity sensors and water temperature sensors on automobiles, which were connected with instruments or indicator lights.

In the 1970s, in order to control emissions, some sensors were added to help control the power system of automobiles, because the catalytic converters, electronic ignition and fuel injection devices that appeared in the same period needed these sensors to maintain a certain air-fuel ratio to control emissions. In 1980s, anti-lock braking devices and airbags improved automobile safety.

Today, sensors are used to measure the temperature and pressure of various fluids (such as intake temperature, airway pressure, cooling water temperature and fuel injection pressure, etc.); There are sensors used to determine the speed and position of each part (such as vehicle speed, throttle opening, camshaft, crankshaft, angle and speed of transmission, position of EGR, etc.); There are also sensors for measuring engine load, knock, misfire and oxygen content in exhaust gas; A sensor for determining the position of the seat; Sensors for measuring wheel speed, road height difference and tire pressure in anti-lock braking system and suspension control device; To protect the airbag of the front passenger, not only more collision sensors and acceleration sensors are needed. Facing the manufacturer's side volume, overhead airbag and more exquisite side head airbag, sensors should be added. As researchers use anti-collision sensors (ranging radar or other ranging sensors) to judge and control the lateral acceleration of the car, the instantaneous speed of each wheel and the required torque, the braking system has become an integral part of the car stability control system.

Old-fashioned oil pressure sensors and water temperature sensors are independent of each other. Because there is a clear maximum or minimum limit, some of them are actually equivalent to switches. With the development of electronic and digital sensors, their output values will be more relevant.