Accessory drive and engine restarting system

• US 8,382,631 B2
• Filed: 07/21/2010
• Issued: 02/26/2013
• Est. Priority Date: 07/21/2010
• Status: Expired due to Fees

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Hoffman, Donald E., Janson, David A.
• Primary Examiner(s): PANG, ROGER L
• Application Number:
  US12/840,353
• Publication Number:
  US 20110165987A1
• Time in Patent Office: 951 Days
• Field of Search: 475/210, 475/211, 475/214, 475/215, 475/216, 475/217, 475/219, 475/189, 475/196, 180/53.8
• US Class Current: 475/214
• CPC Class Codes: B60K 2006/268 Electric drive motor starts the engine, i.e. used as starter motor
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• CPC Class Codes: F16H 37/0853 CVT using friction between rotary members having a first member of uniform effective diameter cooperating with different parts of a second member
• CPC Class Codes: F16H 9/04 using belts, V-belts, or ropes with toothed belts F16H9/24; pulleys of adjustable construction F16H55/52
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10T 74/19 Gearing

Abstract

A drive system includes a pulley, an engine, a variator for varying a ratio of an output speed and an input speed, a gearset including a first and second components driveably connected to the engine and pulley, respectively, and a third component connected to the output, and a second gearset for increasing an input speed relative to an pulley speed.

Claims

1. A drive system, comprising:

a pulley;

an engine;

a variator including an input and an output, for varying a ratio of output speed and input speed;

a first gearset including first component and a second component driveably connected to the engine and pulley, respectively, and a third component connected to the output;

a second gearset for increasing the input speed relative to the speed of the pulley.

2. The system of claim 1, wherein the speed ratio between the engine and the pulley can vary continuously between 0.0 and a positive value.

3. The system of claim 1, wherein the variator comprises:

a first race secured against rotation;

a second race comprising the input;

a ball engaged with the races and driving the output at a variable speed depending on a location of contact between the ball and the races, the output secured to a sun gear of the gearset.

4. The system of claim 1, wherein the first gearset comprises:

a sun gear connected to the output;

a ring gear connected to the engine;

a carrier secured connected to the pulley; and

planet pinions supported for rotation on the carrier and meshing with the sun gear and the ring gear.

5. The system of claim 1, wherein the second gearset comprises:

a second sun gear connected to the input;

a second ring gear held against rotation;

a second carrier connected to the pulley; and

second planet pinions supported for rotation on the second carrier and meshing with the second sun gear and the second ring gear.

6. The system of claim 1, wherein:

the first gearset comprises a sun gear connected to the output, a ring gear connected to the engine, a carrier securely connected to the pulley, and planet pinions supported for rotation on the carrier and meshing with the sun gear and the ring gear; and

a second gearset comprising a second sun gear connected to the input, a second ring gear held against rotation, a second carrier connected to the pulley and the carrier, and second planet pinions supported for rotation on the second carrier and meshing with the second sun gear and the second ring gear.

7. The system of claim 1, further comprising:

a clutch producing a one-way drive connection between the engine and the pulley.

8. A drive system, comprising:

an engine;

a variator including an output and an input, for varying a ratio of output speed and input speed, a first race secured against rotation, a second race comprising the input, a ball engaged with the races and driving the output at a variable speed depending on location of contact between the ball and the races, the output driven by the ball and secured to a sun gear; and

a gearset including the sun gear connected to the output, a ring gear connected to the engine, a carrier connected to a pulley, and planet pinions supported for rotation on the carrier and meshing with the sun gear and the ring gear.

9. The drive system of claim 8, further comprising:

a second gearset including a second sun gear connected to the input, a second ring gear held against rotation, a second carrier connected to the pulley, and second planet pinions supported for rotation on the second carrier and meshing with the second sun gear and the second ring gear.

10. The drive system of claim 8, further comprising:

a second gearset including a second sun gear connected to the input, a second ring gear held against rotation, a second carrier connected to the pulley, and second planet pinions supported for rotation on the second carrier and meshing with the second sun gear and the second ring gear.

11. The system of claim 8, further comprising a clutch producing a one-way drive connection between the engine and the pulley.