Patent ID: 7099763
Filing Date: 2006-08-29
Classification: F16H,G01P

Abstract:
1. A vehicle rapid deceleration detection device, comprising: a rotation sensor which generates a vehicle speed pulse signal in synchronism with a vehicle speed; an elapsed time measuring unit which measures an elapsed time from a time the vehicle speed pulse signal is input; a vehicle speed calculating unit which calculates the vehicle speed from the interval of said vehicle speed pulse signal; a vehicle speed memory unit which stores a determined vehicle speed at a prior predetermined time; a deceleration pulse interval calculating unit which calculates a pulse interval corresponding to a predetermined deceleration relative to the determined vehicle speed at the prior predetermined time stored by said vehicle speed memory unit; and a rapid deceleration determining unit which determines rapid deceleration of the vehicle; wherein said rapid deceleration determining unit compares the elapsed time measured by said elapsed time measuring unit with the pulse interval calculated by said deceleration pulse interval calculating unit, and when the elapsed time is longer than the pulse interval, determines that the vehicle has rapidly decelerated.