Variable speed accessory drive system
First Claim
Patent Images
1. An accessory drive system for a vehicle comprising:
- an engine;
an accessory operatively connected to the engine;
a planetary gear set disposed between the engine and the accessory;
a motor/generator operatively connected to the planetary gear set;
wherein output from said engine is transferable through the planetary gear set to drive the accessories, and the speed at which the accessories are driven is selectable by controlling the speed of the motor/generator.
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Abstract
The present invention provides an accessory drive system for a vehicle. The accessory drive system includes a planetary gear set having a first, second, and third planetary member. A torque transfer device operatively connects an engine with the first planetary member. A motor/generator is operatively connected to the second planetary member, and a plurality of accessories are operatively connected to the third planetary member. Engine output is transferable through the planetary gear set to drive the accessories, and the speed at which the accessories are driven is selectable by controlling the speed of the motor/generator.
39 Citations
20 Claims
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1. An accessory drive system for a vehicle comprising:
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an engine; an accessory operatively connected to the engine; a planetary gear set disposed between the engine and the accessory; a motor/generator operatively connected to the planetary gear set; wherein output from said engine is transferable through the planetary gear set to drive the accessories, and the speed at which the accessories are driven is selectable by controlling the speed of the motor/generator. - View Dependent Claims (2, 3, 4, 5)
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6. An accessory drive system for a vehicle comprising:
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a planetary gear set having a first, second, and third planetary member; an engine operatively connected to the first planetary member; a motor/generator operatively connected to the second planetary member; and a plurality of accessories operatively connected to the third planetary member; wherein engine output is transferable through the planetary gear set to drive the plurality of accessories, and the speed at which the plurality of accessories are driven is selectable by controlling the torque transfer from the motor/generator to the second planetary member. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An accessory drive system comprising:
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a planetary gear set having a first, second, and third planetary member; a first torque transfer apparatus operatively connecting an engine to the first planetary member; a second torque transfer apparatus operatively connecting a motor/generator to the second planetary member; and an accessory operatively connected to the third planetary member; wherein the engine provides sufficient rotational resistance while off to restrain the first planetary member from rotating and thereby allow the motor/generator to drive the accessory without also driving the engine. - View Dependent Claims (19, 20)
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Specification