TUNED BATTERY PACK DAMPER FOR A HYBRID ELECTRIC VEHICLE
First Claim
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1. A tuned mass damper system for a hybrid electric road vehicle having road wheels and a powertrain with an engine, at least one motor-generator and a battery, the battery being a source of driving power and an electric energy storage medium, the damper system comprising:
- a primary damper mass comprising the mass of the vehicle including mass of a vehicle body;
a secondary damper mass comprising the mass of the battery;
a vehicle suspension system located between the vehicle wheels and the vehicle mass, the suspension system supporting the vehicle mass;
the vehicle suspension system comprising at least one spring and at least one vibration damper acting in parallel relationship; and
at least one battery mounting spring between the battery mass and the vehicle mass and supporting the battery whereby the battery mass functions as a tuned damper mass as force vibrations induced by road irregularities are attenuated as they are transmitted to the vehicle mass by the road wheels.
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Abstract
A tuned mass damper system and vibration damper method for a hybrid electric road vehicle is disclosed. The vehicle has a powertrain with an engine, at least one electric machine and a battery. The battery mass forms a part of a vehicle vibration absorber that attenuates vibrations induced by road wheels of the vehicle.
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Citations
10 Claims
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1. A tuned mass damper system for a hybrid electric road vehicle having road wheels and a powertrain with an engine, at least one motor-generator and a battery, the battery being a source of driving power and an electric energy storage medium, the damper system comprising:
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a primary damper mass comprising the mass of the vehicle including mass of a vehicle body; a secondary damper mass comprising the mass of the battery; a vehicle suspension system located between the vehicle wheels and the vehicle mass, the suspension system supporting the vehicle mass; the vehicle suspension system comprising at least one spring and at least one vibration damper acting in parallel relationship; and at least one battery mounting spring between the battery mass and the vehicle mass and supporting the battery whereby the battery mass functions as a tuned damper mass as force vibrations induced by road irregularities are attenuated as they are transmitted to the vehicle mass by the road wheels. - View Dependent Claims (2, 3)
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4. A method for attenuating vibrations induced by vehicle road wheel forces that act on a hybrid electric road vehicle, the vehicle having a powertrain that includes an engine, an electric machine and a battery electrically coupled to the electric machine;
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mounting the mass of the vehicle on vehicle road wheels with at least one suspension spring and damper assembly; mounting the mass of the battery on the vehicle mass with at least one tuned mounting element; calculating simplified equations of motion of the mass of the vehicle and the mass of the battery; transforming the equation of motion of the mass of the vehicle from a time domain to a frequency domain; transforming the equation of motion of the mass of the battery from a time domain to a frequency domain; combining the transformed equations of motion of the vehicle mass and the battery mass; and calculating an effective stiffness factor for the mounting spring for the mass of the battery using the combined transformed equations of motion. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification