Patent ID: 7603895
Filing Date: 2009-10-20
Classification: B60C

Abstract:
1. A trigger unit mounting structure in a wheel position detection system for a vehicle, the system including a trigger arrangement for outputting a trigger signal over a magnetic field towards a transceiver attached to each of wheels of the vehicle by comprising a magnetic field type antenna being configured by a core wounded by a coil through which an electric current flows to generate the magnetic field, the transceiver receiving the trigger signal, measuring a reception strength of the received trigger signal, and transmitting data of the measured reception strength to a receiver in a body of the vehicle, the wheel position detection system thus detecting a wheel position of the each of the wheels based on the data transmitted from the transceiver, the trigger arrangement comprising, each trigger unit of (i) the first trigger unit and (ii) the second trigger unit being arranged such that a closer-side wheel of each of (i) front wheels and (ii) rear wheels is closer to the each trigger unit than a farther-side wheel of the each of (i) front wheels and (ii) rear wheels, the closer-side wheel being accommodated in a tire housing having an internal wall surface facing the closer-side wheel, the each trigger unit being arranged at a point J on the internal wail surface, wherein wherein each of the first trigger unit and the second trigger unit is arranged at the point J such that the angle W is within a range between 5 degrees to 25 degrees.