Patent ID: 8768602
Filing Date: 2014-07-01
Classification: F01N,F02B,F02D,F02M,F02P

Abstract:
1. A straddle-type vehicle, comprising: a vehicle body frame; an engine mounted on the vehicle body frame; a combustion adjusting device for adjusting a combustion condition of the engine; and a combustion controller for controlling the combustion adjusting device such that during a predetermined period, during which a plurality of combustion cycles occur, maximum points of a sound pressure level waveform of an audible sound wave generated from the engine are generated, each of the maximum points corresponding to a maximum intensity of the sound pressure level waveform during one of the combustion cycles so that each of the combustion cycles has a respective maximum point of the maximum points, during the predetermined period, the maximum points being shifted from each other by at least a predetermined amount so as to cause an irregular timing of the maximum points.