Where is the longitudinal acceleration sensor located?
2 Answers
Longitudinal acceleration sensors generally do not have a fixed position. In most vehicle models, they are installed at the front of the vehicle's center of gravity. Of course, a vehicle may have multiple longitudinal acceleration sensors, such as on the wheels and B-pillars. Their function is to detect the phenomenon of the vehicle lifting or nodding during acceleration or braking deceleration, in order to control the adjustment of the front and rear axle ADS damping force, thereby providing optimal ride comfort. Additional information: 1. When the sensing element moves with acceleration a, the mass block is subjected to an inertial force opposite to the direction of acceleration, causing deformation proportional to the acceleration a, which in turn causes stress and strain in the cantilever beam. This deformation is detected by the diffused resistor attached to the cantilever beam. According to the piezoresistive effect of silicon, the resistance of the diffused resistor changes proportionally to the strain. Using this resistor as one arm of a bridge, the measurement of acceleration can be completed by measuring the change in the bridge's output voltage. 2. Principle of acceleration sensor: The sensitive element converts the acceleration signal at the measurement point into a corresponding electrical signal, which enters the preamplifier circuit. The signal is then processed by a signal conditioning circuit to improve the signal-to-noise ratio, followed by analog-to-digital conversion to obtain a digital signal. Finally, the signal is sent to a computer for data storage and display.
As an ordinary person passionate about delving into automotive technology, I believe the longitudinal acceleration sensor is typically installed in the central area of the vehicle floor, near the driveshaft or transmission. This sensor is primarily used to detect changes in the vehicle's acceleration and deceleration, working in conjunction with the electronic stability control system. Usually, it is covered by protective plates or carpets, making it difficult to spot. While driving, it continuously monitors dynamics to help maintain vehicle stability during sudden braking or cornering. If you're curious about its exact location, consulting the vehicle manual is the quickest way, as placement may vary slightly between models like sedans or SUVs. Car owners modifying their vehicles should avoid relocating it, as this could impair functionality and driving safety.
