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AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorHironobu Suzuki
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A straddle-type vehicle 30 includes a vehicle body frame 31, an engine 1 mounted on the vehicle body frame 31, combustion adjusting devices (fuel injection valves) 14 and 15 for adjusting the combustion condition of the engine 1, and a combustion controller (ECU) 22 for controlling the fuel injection valves 14 and 15. The ECU 22 controls the fuel injection valves 14 and 15 such that the maximum point of a sound pressure level waveform of an audible sound wave generated from the engine 1 or the vehicle body frame 31 is shifted by a predetermined amount or larger within a predetermined period at least in some of the operation conditions of the engine 1.
A straddle-type vehicle, comprising:
A combustion controller for a straddle-type vehicle which controls a combustion adjusting device for adjusting the combustion condition of an engine mounted on a vehicle body frame, characterized in that the combustion controller controls the combustion adjusting device such that the maximum point of a sound pressure level waveform of an audible sound wave generated from the engine or the vehicle body frame is shifted by a predetermined amount or larger within a predetermined period at least in some of the operation conditions of the engine.
A straddle-type vehicle, comprising:
A combustion controller for a straddle-type vehicle which controls a fuel supply device for adjusting the amount of fuel to be supplied to an engine mounted on a vehicle body frame, characterized by controlling the fuel supply device such that the amount of fuel to be supplied to a specific cylinder of the engine is shifted by 10% or larger at least in a part of the idling condition of the engine to change a sound pressure level of an audible sound wave generated from the engine or the vehicle body frame.
A straddle-type vehicle, comprising:
A combustion controller for a straddle-type vehicle which controls an ignition device for adjusting ignition of an engine mounted on a vehicle body frame, characterized by controlling the ignition device such that the ignition timing for a specific cylinder of the engine is shifted by 5° or larger at least in a part of the idling condition of the engine to change a sound pressure level of an audible sound wave generated from the engine or the vehicle body frame.
A straddle-type vehicle, comprising:
A combustion controller for a straddle-type vehicle which controls an intake amount adjusting device for adjusting the intake air amount to be taken to an engine mounted on a vehicle body frame, characterized by controlling the intake amount adjusting device such that the intake air amount to a specific cylinder of the engine is altered by 10% or larger at least in a part of the idling condition of the engine to change a sound pressure level of an audible sound wave generated from the engine or the vehicle body frame.
Dependencies are inferred from the claim text.