What are the functions of various engine sensors?
1 Answers
Introduction to the functions of various engine sensors is as follows: 1. Odometer sensor: Located on the differential or half-shaft, this sensor detects the number of rotations, generally using Hall effect or photoelectric methods to measure signals. Its purpose is to effectively analyze and determine the vehicle's speed and mileage by counting the odometer readings. Since the angular velocity of the half-shaft and wheels is equal, and the tire radius is known, the mileage can be directly calculated using this parameter. 2. Oil pressure sensor: Typically, the oil pressure sensor is used to detect the remaining amount of oil in the vehicle's oil tank. It converts the detected signal into an understandable signal to alert the driver about how much oil is left, how much farther the vehicle can travel, or even remind the driver to add oil. 3. Water temperature sensor: The electronic control unit (ECU) measures the engine coolant temperature based on changes detected by this sensor, using it as a correction signal for fuel injection and ignition timing. This allows the driver to understand the operating state of the vehicle, such as whether it is stopped or moving, or how long it has been running, by monitoring the engine's water temperature. 4. ABS sensor: The ABS system works to ensure that the brake pistons and brake discs do not lock up, keeping them at the edge between sliding friction and static friction. Most ABS systems use inductive sensors to monitor wheel speed. The ABS sensor interacts with a toothed ring that rotates synchronously with the wheel, outputting a set of quasi-sinusoidal AC signals whose frequency and amplitude are related to the wheel speed. This output signal is sent to the ABS electronic control unit (ECU) to enable real-time monitoring of wheel speed.
