| 摘要 |
A wheel speed sensor for a vehicle and an automatic air gap correcting method are provided to measure the wheel speed by keeping a gap between a head unit and a tooth of a wheel uniformly all the time and to supply exact information to an ABS(Anti-Lock Brake System) and an ESP(Electronic Stability Program). In a wheel speed sensor(10) for a vehicle, a head(12) embedding a rubber tube(13) is installed at a base(11) to move up and down and is elastically supported by a spring(14). A solenoid valve(16) is installed at a passage(15) formed in the base and connected with the rubber tube. Brake hydraulic pressure is generated by applying a brake switch through an ESP ECU(Electronic Control Unit) if an air gap formed between the head of the wheel speed sensor and a tooth of a wheel is detected. And then, an air gag is corrected by controlling the operation of the solenoid valve. |
