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which speed sensor controls the speedometer
Vehicle speed sensor and odometer sensor The vehicle speed sensor is a device used to check the speed of an electronically controlled vehicle. It also has other functions, such as adjusting the idle speed of the engine by adjusting the input signal of the computer, locking the hydraulic torque converter of the automatic transmission, shifting the automatic transmission, turning on and off the engine cooling fan, cruising, etc.Installation position of vehicle speed sensor - the concept speedometer displays the driving speed of the vehicle by swinging the pointer. To put it simply, there is a system in the speedometer to control the pointer swing (rotary table with pointer shaft, rotary shaft with permanent magnet, bearing, hairspring and other components). The swing amplitude of the pointer is ultimately determined by the output speed of the gearbox (that is, the rotating shaft of the speedometer is driven by the flexible shaft, which is connected with the worm gear in the worm gear transmission pair on the output shaft of the automobile gearbox or transfer case).
The manufacturing process, installation and configuration errors of these parts, as well as the natural wear and magnetic changes of magnetic components in the use process, will basically cause the indication error of the speedometer. Installation position of vehicle speed sensor - function Most of the vehicle speed sensors are installed in the drive axle housing or gearbox housing. The signal wire of the vehicle speed sensor is usually installed in the shielding sheath to eliminate electromagnetic and radio frequency interference generated by high-voltage live wire, car phone or other electronic equipment, ensure that electronic communication will not be interrupted, and avoid poor driving performance or other problems.
Installation position of speed sensor - installation position The speed sensor detects the speed of the electronically controlled vehicle, regulates the computer to adjust the engine idle speed by using the input signal, locks the torque converter of the automatic transmission, shifts the automatic transmission, switches the engine cooling fan, cruises and other functions. Installed on transmission output shaft.Another one is installed on the trip meter to help the transmission. After the former fails, the latter plays the role of failure protection. The speed sensor is installed next to the transmission output shaft. At first, it is used to check the speed of the transmission shaft. It is linked with the transmission shaft and transmitted to the speedometer through the flexible shaft to display the corresponding speed. At present, electronic sensors are widely used and installed in the same location, but instead of using flexible shafts, they use wires to transmit speed signals to the speedometer.
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