James G Hendrickson

US Patent:

7169074, Jan 30, 2007

Filed:

Jan 24, 2005

Appl. No.:

11/041802

Inventors:

Madhusudan Raghavan - West Bloomfield MI, US
Norman K. Bucknor - Troy MI, US
James D. Hendrickson - Belleville MI, US
Alan G. Holmes - Clarkston MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F16H 3/72

US Classification:

475 5, 475280, 475284, 475330, 475151, 180 652, 180 657, 701 22

Abstract:

The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and four or five selectable torque-transfer devices. The selectable torque transfer devices are engaged singly or in combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and three mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

US Patent:

7179185, Feb 20, 2007

Filed:

Jan 4, 2005

Appl. No.:

11/028843

Inventors:

Madhusudan Raghavan - West Bloomfield MI, US
Norman K. Bucknor - Troy MI, US
James D. Hendrickson - Belleville MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F16H 3/72

US Classification:

475 5, 475151

Abstract:

The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and four or five selectable torque-transfer devices (two clutches and two or three brakes). The selectable torque transfer devices are engaged singly or in combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

US Patent:

7179186, Feb 20, 2007

Filed:

Jan 4, 2005

Appl. No.:

11/029075

Inventors:

Norman K. Bucknor - Troy MI, US
James D. Hendrickson - Belleville MI, US
Madhusudan Raghavan - West Bloomfield MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F16H 3/72
F16H 3/44

US Classification:

475 5, 475280

Abstract:

The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and four or five selectable torque-transfer devices (two clutches and two or three brakes). The four or five selectable torque transfer devices are engaged singly or in combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

US Patent:

7179187, Feb 20, 2007

Filed:

Feb 18, 2005

Appl. No.:

11/061105

Inventors:

Madhusudan Raghavan - West Bloomfield MI, US
Norman K. Bucknor - Troy MI, US
James D. Hendrickson - Belleville MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

F16H 3/72

US Classification:

475 5, 475151

Abstract:

The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and four selectable torque-transfer devices (two clutches and two brakes). The selectable torque transfer devices are engaged singly or in combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

US Patent:

7192373, Mar 20, 2007

Filed:

Nov 24, 2004

Appl. No.:

10/997710

Inventors:

Norman K. Bucknor - Troy MI, US
James D. Hendrickson - Belleville MI, US
Madhusudan Raghavan - West Bloomfield MI, US
Alan G. Holmes - Clarkston MI, US
Patrick B. Usoro - Troy MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F16H 3/72

US Classification:

475 5, 180 652, 180 657

Abstract:

The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and four or five selectable torque-transfer devices. The selectable torque transfer devices are engaged singly or in combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

US Patent:

7220201, May 22, 2007

Filed:

Apr 22, 2005

Appl. No.:

11/112131

Inventors:

Madhusudan Raghavan - West Bloomfield MI, US
Norman K. Bucknor - Troy MI, US
James D. Hendrickson - Belleville MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

F16H 3/72
F16H 37/06

US Classification:

475 5, 475 4

Abstract:

The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and five selectable torque-transfer devices. The selectable torque transfer devices are engaged singly or in pairs to yield an EVT with a continuously variable range of speeds (including reverse) and four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

US Patent:

7220202, May 22, 2007

Filed:

May 18, 2005

Appl. No.:

11/131877

Inventors:

Tejinder Singh - Canton MI, US
Henryk Sowul - Oxford MI, US
James D. Hendrickson - Belleville MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

F16H 3/72

US Classification:

475 5

Abstract:

The present invention provides an electrically variable transmission having two motor/generators, two differential gear sets such as planetary gear sets, and five torque transfer devices arranged to provide improved launch, performance and gradeability, and enabling five fixed speed ratios. An input member is continuously connected to one member (preferably a ring gear) of the first planetary gear set, and an output member is continuously connected to one member (preferably a carrier) of the second planetary gear set. One motor/generator is continuously connected to another member (preferably a sun gear) in the first planetary gear set as well as being selectively connected to a member (preferably a ring gear) of the second planetary gear set. The second motor/generator is continuously connected to the remaining member (preferably a sun gear) of the second planetary gear set, and is selectively connected to the remaining member (preferably a carrier) of the first planetary gear set.

US Patent:

7232393, Jun 19, 2007

Filed:

Apr 1, 2005

Appl. No.:

11/096720

Inventors:

Norman K. Bucknor - Troy MI, US
James D. Hendrickson - Belleville MI, US
Madhusudan Raghavan - West Bloomfield MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

F16H 3/72

US Classification:

475 5, 475149

Abstract:

The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and two or three selectable torque-transfer devices. The selectable torque transfer devices are engaged singly to yield an EVT with a continuously variable range of speeds (including reverse) and two or three mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.