| 摘要 |
A device for detecting different kinds of tires in an ESP(Electronic Stability Program) system and a detecting method suitable for the same are provided to improve stability of a vehicle by checking whether different kinds of tires are installed or not, regardless of the turning state of the vehicle and distortion of the slip ratio. A device for detecting different kinds of tires in an ESP system is composed of: an ESP sensor signal processing unit judging the state of a vehicle speed sensor, a wheel speed sensor, a steering angle sensor, a lateral acceleration sensor, and a yaw rate sensor and setting offset; a tire slip ratio calculation unit computing the slip ratios of each tire by vehicle speed and wheel speed of signals sent from the vehicle and wheel speed sensors; an effective slip judging unit judging whether the tire slip ratio is generated by the control of driving power and braking power of a vehicle or not, by exchanging information with an ABS(Anti-Lock Brake System), a TCS(Traction Control System), or an ESP; a turning judging unit judging whether the vehicle turns or not, from signals transmitted from the steering angle sensor, the lateral acceleration sensor, and the yaw rate sensor; and a different tire judging unit determining that different kinds of tires are installed, if a difference value between the slip ratios of tires of inner and outer races of the predetermined speed is kept within a predetermined range for a certain time while the slip ratio of each tire is in an effective state, but not the distortion state generated by the control of driving power and turning condition. |
