Starter alternator accessory drive system for a hybrid vehicle
First Claim
1. A starter alternator accessory drive system for a hybrid vehicle comprising:
- an engine;
a crank pulley operatively connected to the engine;
an accessory drive input pulley operatively connected to the crank pulley;
an accessory;
an accessory drive output pulley operatively connected to the accessory;
a planetary gear set disposed between the accessory drive input pulley and the accessory drive output pulley to transfer output from the engine to the accessory;
a first motor/generator operatively connected to the planetary gear set; and
a second motor/generator operatively connected to the planetary gear set;
wherein the first and second motor/generators are controllable to power the accessory via the planetary gear set at a selectable rate independent of engine speed, and to re-start the engine while simultaneously powering the accessory.
12 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides an alternator starter accessory drive system for a hybrid vehicle. The starter alternator accessory drive system includes a planetary gear set having a first, second, and third planetary member. An engine is operatively connected to the first planetary member, and a first motor/generator is operatively connected to the second planetary member. A torque transfer device operatively connects a plurality of accessories to the third planetary member. A second motor/generator is operatively connected to either the third planetary member or the torque transfer device. Engine output is transferable through the planetary gear set to drive the accessories at a selectable rate, and the first and second motor/generators are controllable to run the accessories while the engine is off and to re-start the engine.
152 Citations
20 Claims
-
1. A starter alternator accessory drive system for a hybrid vehicle comprising:
-
an engine; a crank pulley operatively connected to the engine; an accessory drive input pulley operatively connected to the crank pulley; an accessory; an accessory drive output pulley operatively connected to the accessory; a planetary gear set disposed between the accessory drive input pulley and the accessory drive output pulley to transfer output from the engine to the accessory; a first motor/generator operatively connected to the planetary gear set; and a second motor/generator operatively connected to the planetary gear set; wherein the first and second motor/generators are controllable to power the accessory via the planetary gear set at a selectable rate independent of engine speed, and to re-start the engine while simultaneously powering the accessory. - View Dependent Claims (2, 3, 4)
-
-
5. 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. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. 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. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification