CONTROLLING VOLUME OF AN AUDIO SYSTEM IN A VEHICLE IN RESPONSE TO ENGINE TORQUE
Publication Date: 2005-Sep-29
The IP.com Prior Art Database
The volume of an audio system in a vehicle such as truck is controlled in response to engine torque instead of speed such that the volume of the audio system is decreased in response to increasing engine torque and vice versa. Hereby, the driver will be able to clearly hear a distinct sound from the engine also during acceleration and when going uphill.
In commercial vehicles such as trucks and buses as well as in private vehicles, the audio system in the cab is designed to automatically increase the volume in response to a speed increase of the vehicle and vice versa. Hereby, the drivers will not have to manually change the volume in response to changing driving conditions.
However, truck and bus drivers in particular still have a desire to hear a distinct engine sound during acceleration and when going uphill.
This will then be difficult when the volume automatically increases in response to increased speed at the same time as the cabs have become more and more sound-proof.
By instead decreasing the volume of the audio system in response to increasing engine torque, the driver will be able to clearly hear a distinct engine sound also during acceleration and when going uphill.
When the load on the engine decreases, i.e. when the engine torque decreases, the volume is increased again.
This can be accomplished by monitoring the actual value of the engine torque by means of the control unit of the engine.
This actual value of the engine torque is sent via an internal communication bus to a coordinator unit that calculates, e.g. by means of a pre-established table or function, a set value to which the volume should be adjusted in view of the actual value of the engine torque. This set value is then sent to the control unit of the audio system to ad...