Alan G. Holmes - Clarkston MI, US Steven Lee Hayslett - Troy MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
B60W 10/06
US Classification:
180 6528, 180 65265, 180 65275
Abstract:
A hybrid powertrain for a vehicle is provided that includes an engine having a crankshaft and a motor/generator operatively connected to the crankshaft. An elastic member is operatively connected to the crankshaft and configured to be wound by one of the engine or the motor/generator. A one-way torque-transmitting mechanism is operatively connected to a first end portion of the elastic member and configured to overrun prior to winding of the elastic member. The elastic member is configured to be releasable to allow unwinding of the elastic member to rotate the crankshaft to restart the engine. A method of starting an engine on a hybrid vehicle is also provided.
Steven Lee Hayslett - Troy MI, US Peter Bostwick - Rochester MI, US Edward L. Kaiser - Orion MI, US
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit
International Classification:
H02K 1/32
US Classification:
310 61
Abstract:
A rotor assembly with a cooling mechanism having first and second channels is provided. The rotor assembly includes a shaft having a hollow portion and a rotor core having at least one rotor stack positioned at least partially around the shaft. The rotor core has a first end and a second end. The rotor stack forms an interior cavity which is only partially filled with a permanent magnet so as to define a gap in the rotor stack. The first channel is configured to direct fluid flow in a generally radial direction from the hollow portion of the shaft. The second channel is at least partially defined by the gap in the interior cavity of the rotor stack and is configured to direct the fluid flow from the first channel to at least one of the first and second ends of the rotor core.
Electric Machine With Circumferential Rotor And Housing Fins
Paul F. Turnbull - Canton MI, US Steven Lee Hayslett - Troy MI, US John C. Morgante - Sterling Heights MI, US
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI
International Classification:
H02K 9/22
US Classification:
310 64
Abstract:
An electric machine is provided with a rotor core rotatable about a central axis. A first end ring is operatively connected to one end of the rotor core. A first housing component at least partially encloses the rotor core. At least one first rotor fin extends from the first end ring in a first direction which may be substantially parallel to the central axis. At least one first housing fin extends from the first housing component in a second direction that is substantially opposite to the first direction. The first rotor and housing fins extend circumferentially around the central axis. The first rotor fin and the first housing fin are configured to interleave, thereby enhancing heat transfer between the first rotor and housing fin, and cooling the rotor core.
Method And Apparatus For Controlling An Electric Machine
- DETROIT MI, US Steven L. Hayslett - Troy MI, US Harry J. Bauer - Troy MI, US Daniel J. Berry - Macomb Township MI, US George D. Dolan - Pontiac MI, US
International Classification:
B60L 15/20
Abstract:
A method for operating an electric machine of a ground vehicle includes periodically determining an aging parameter based upon a temperature of the electric machine and periodically determining a short-term aging effect based upon the periodically determined aging parameter. A long-term aging effect is determined based upon the short-term aging effect. A short-term temperature adjustment is determined based upon the short-term aging effect and a long-term temperature adjustment is determined based upon the long-term aging effect. A temperature-based derated motor torque is determined based upon the long-term temperature adjustment and the short-term temperature adjustment. Operation of the electric machine is controlled responsive to an operator command for torque based upon the temperature-based derated motor torque.