Patent ID: 9174694
Filing Date: 2015-11-03
Classification: B62K

Abstract:
1. An exhaust gas sensor arrangement structure for a motorcycle comprising: a vehicle body frame; an internal combustion engine suspended on the vehicle body frame between front and rear wheels; exhaust pipes extending toward a rear side in the longitudinal direction of a vehicle from a front side of the internal combustion engine in the longitudinal direction of the vehicle in a state where the exhaust pipes extend below the internal combustion engine; wherein the vehicle body frame includes a pair of left and right bottom frame portions extending toward a rear side in the longitudinal direction of a vehicle body while extending along both sides of a lower portion of the internal combustion engine; and exhaust gas sensors arranged on upper halves of the exhaust pipes arranged between the internal combustion engine and the bottom frame portions as viewed from a front side in the longitudinal direction of the vehicle in a state where the exhaust gas sensors are sandwiched between the internal combustion engine and the bottom frame portions as viewed from a front side in the longitudinal direction of the vehicle, wherein center axes of the exhaust gas sensors are arranged with upper portions thereof inclined toward the outside in the vehicle width direction with respect to a vehicle center vertical line in a state where the center axes are directed toward positions between the internal combustion engine and the bottom frame portions, and wherein a plurality of exhaust pipes are arranged in a state where the exhaust pipes extend along both left and right sides of the internal combustion engine below the internal combustion engine respectively, and the exhaust gas sensors are arranged on the exhaust pipes on both left and right sides in an inclined manner with respect to the vertical direction.