Engine harmonic enhancement control
AssigneeBose Corporation
InventorCristian Marius Hera
Life of this patent
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Abstract
Systems and methods providing engine harmonic enhancement receive a first signal representative of a load on an engine and generate a control parameter based on the first signal. One or more harmonic scaling elements generate a scaled version of an engine harmonic signal based on the control parameter. Each harmonic scaling element includes a harmonic specific mapping element for mapping the control parameter to a scaling factor, wherein at least some of the scaling factor values of the harmonic specific mapping element are mapped to control parameter values associated with a negative load on the engine.
Claims10
A system for engine harmonic enhancement, comprising:
- a memory;
- a processor coupled to the memory and configured to act as a controller, the controller configured to receive a first signal representative of a load on an engine and to generate a control parameter based on the first signal;
- one or more harmonic scaling elements, each configured to receive the control parameter and a different engine harmonic signal of a plurality of engine harmonic signals and to generate a scaled version of the received engine harmonic signal, each harmonic scaling element including:
- a harmonic specific mapping element for mapping the control parameter to a harmonic specific scaling factor, wherein at least some of the harmonic specific scaling factor values of the harmonic specific mapping element are mapped to control parameter values which are associated with a negative load on the engine;
- and
- an adjustable gain element for forming a scaled version of the received engine harmonic signal including applying the harmonic specific scaling factor to the received engine harmonic signal,
- wherein the controller is further configured condition the first signal to remove transient components before generating the control parameter.
A method of engine harmonic enhancement, comprising:
- receiving a plurality of engine harmonic signals;
- receiving a first signal representative of a load on an engine;
- determining a control parameter based on the first signal;
- determining a harmonic specific scaling factor for each of one or more engine harmonic signals of the plurality of engine harmonic signals including, for each of the one or more engine harmonic signals, providing the control parameter to a corresponding harmonic specific mapping function configured to map control parameter values to harmonic specific scaling factor values;
- wherein at least some of the harmonic specific scaling factor values are mapped to control parameter values which are associated with a negative load on the engine;
- and
- applying the corresponding harmonic specific scaling factor to each of the one or more engine harmonic signals,
- wherein determining the control parameter based on the first signal includes conditioning the first signal to remove transient components.
Dependencies are inferred from the claim text.