Patent ID: 7231904
Filing Date: 2007-06-19
Classification: B62K,F02D,G01D

Abstract:
1. A relative position detection-and-control device comprising a handlebar, a first member and a second member that are displaceable relative to each other from a reference position, the first member comprising a magnetic portion that generates a magnetic field, the second member comprising a detection section that senses a magnetic flux density, one of the magnetic portion and the detection section being fixed to the handlebar and the other being fixed to an accelerator grip mounted for rotation relative to the handlebar, the reference position corresponding to a completely-closed position of the accelerator grip relative to the handlebar, the detection section comprising a first Hall effect sensor and a second Hall effect sensor that are mounted within the magnetic field generated by the magnetic portion, the first Hall effect sensor being capable of outputting a first detection signal indicative of the reference position, the second Hall effect sensor being capable of outputting a second detection signal that changes in response to changes in the sensed magnetic flux density, and the control section outputting to a controlled member a control signal corresponding to the reference position if the first detection signal indicates that the first and second members are in the reference position and a control signal corresponding to the second detection signal if the first detection signal does not indicate the reference position.