Sound control method for hybrid vehicle

Abstract

Disclosed is a sound control method for a hybrid vehicle having both an engine and a motor as driving power sources, the method including: checking a driving condition of the hybrid vehicle; calculating a first virtual sound optimizing an engine sound by extracting main order components of the engine based on an engine RPM and engine load data, and by optimizing an arrangement of the extracted main order components of the engine or by adjusting output levels thereof; calculating a second virtual sound generating an optimized engine sound by extracting order components of the motor based on a motor RPM and motor load data, converting the extracted order components of the motor into corresponding main order components of the engine, and by optimizing an arrangement of the converted main order components of the engine or by adjusting output levels thereof; and outputting the calculated first virtual sound or the second virtual sound to a sound device.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]The present application claims priority to Korean Patent Application No. 10-2017-0136543, filed Oct. 20, 2017, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUNDTechnical Field[0002]The present invention generally relates to a sound control method for a hybrid vehicle having both an engine and a motor as driving power sources, whereby an optimized vehicle sound is provided to a driver according to a driving condition of the hybrid vehicle.Description of the Related Art[0003]Recently, due to the introduction of vehicles such as hybrid vehicles that use both fossil fuel and a battery as driving power sources, and electric vehicles that use a battery as a driving power source, installation of a sound-generating device in an eco-friendly vehicle has become mandatory because these types of vehicles generate little sound.[0004]In the United States, legislation is being considered requiring that an e...

AI Technical Summary

Benefits of technology

[0008]The present disclosure addresses the above problems by providing a sound control method for a hybrid vehicle in which an interior sound of the hybrid vehicle is consistently maintained, and a suitable virtual sound is provided to a driver according to a driving condition, whether or not the driver drives at a steady speed. Thus, the driver may not feel discomfort due to sound changes during driving, and thus the driving experience is improved.

[0016]According to the various embodiments of the sound control method for the hybrid vehicle configured as described above, a vehicle sound suitable to the vehicle acceleration experience may be provided according to an engine driving condition. Therefore, the driver may enjoy an improved acceleration experience.

[0017]In addition, in a motor driving condition, the acceleration experience may be improved by generating a virtual engine sound according to a driving situation.

[0018]In addition, the driving experience may be improved by gradually changing the sound pressure level during a change in the driving condition of the hybrid vehicle.

[0019]In addition, the driving experience is improved because a suitable output level of the virtual sound is provided according to a speed, an acceleration, a deceleration, and / or a driving mode of the hybrid vehicle.

Problems solved by technology

In general, vehicle noise, lack of vehicle noise, or monotonous vehicle noise may be unpleasant for a driver.

In addition, pedestrians may find vehicle noise unpleasant.

However, vehicle noise may prevent accidents because pedestrians audibly recognize the proximity of a nearby vehicle through such a noise.

In addition, silence or monotone noise within a hybrid vehicle has a negative impact on a driver.

For example, during a motor driving mode, because there is no unique sound from an internal combustion engine, the driving experience may be degraded or the driver may risk falling asleep.

In addition, there may be driving discomfort generated during regenerative braking.

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