Patent Number: 7,822,575

Title: Tilt-angle detecting method and apparatus for a motorcycle

Abstract: A vehicular tilt-angle detecting apparatus includes a steering-angle sensor, a vehicle speed sensor, a lateral-G sensor, a turning-radius calculation unit, a base tilt-angle calculation unit, a transient tilt-angle calculation unit, and a transient tilt angle calculation unit. The turning-radius calculation unit determines a turning radius corresponding to a steering angle based on a predetermined relationship between a steering angle and a turning radius. The base tilt-angle calculation unit calculates a current instantaneous tilt angle of a vehicle body during short-term steady-state turning based on the turning radius and the vehicle speed. The transient tilt-angle calculation unit corrects the initial calculated tilt angle of the vehicle body based on a transient turning radius when a variation of the steering angle is equal to or greater than a predetermined value. When the variation is less than the predetermined value, the transient tilt-angle calculation unit calculates the lateral-G corrected transient tilt angle.

Inventors: Suzuki; Osamu (Saitama, JP), Hatanaka; Kaoru (Saitama, JP), Miyagishi; Syunichi (Saitama, JP)

Assignee: Honda Motor Co., Ltd.

International Classification: G01P 15/00 (20060101)

Expiration Date: 2018-10-26 0:00:00