Starter alternator accessory drive system for a hybrid vehicle

A starter alternator accessory drive system for a hybrid vehicle comprising:

• a planetary gear set having a first, second, and third planetary member, wherein the first planetary member is operatively connected to an accessory drive input pulley, and the third planetary member is operatively connected to an accessory drive output pulley;
• an engine operatively connected to the accessory drive input pulley;
• a first motor/generator operatively connected to the second planetary member;
• a second motor/generator operatively connected to the accessory drive output pulley;
• and
• a plurality of accessories operatively connected to the accessory drive output pulley;
• wherein engine output is transferable through the planetary gear set to drive the plurality of accessories at a selectable rate, and the first and second motor/generators are controllable to run the plurality of accessories while the engine is off and to re-start the engine.

A starter alternator accessory drive system for a hybrid vehicle comprising:

• a planetary gear set having a first, second, and third planetary member;
• one of plurality of pulleys connected by a belt member and a plurality of sprockets connected by a chain member operatively connecting an engine with the first planetary member;
• a first motor/generator operatively connected to the second planetary member;
• one of a plurality of pulleys connected by a belt member and a plurality of sprockets connected by a chain member operatively connecting a plurality of accessories to the third planetary member;
• and
• a second motor/generator operatively connected to the third planetary member;
• wherein engine output is transferable through the planetary gear set to drive the plurality of accessories at a selectable rate, and the first and second motor/generators are controllable to run the plurality of accessories while the engine is off and to re-start the engine.