Daniel E Berry

US Patent:

20220314372, Oct 6, 2022

Filed:

Mar 30, 2021

Appl. No.:

17/217483

Inventors:

- Detroit MI, US
Daniel T. Berry - Novi MI, US
Daniel L. Baker - Goodrich MI, US
Frank D. Risko - Clarkston MI, US

International Classification:

B23K 26/40

Abstract:

A method of making an enhanced cast iron workpiece having increased oil retention is provided. The method comprises providing a laser tool arranged to emit a laser to perform carbon burn-off from a cast iron workpiece. The cast iron workpiece comprises cast iron and having a first surface with carbon microstructures thereon. The method further comprises selectively laser burning-off carbon microstructures from the first surface of the workpiece to form a pattern on the first surface. The pattern has separate pockets by the laser burn-off of carbon microstructures on the first surface. Each separate pocket is separate from and free of fluid communication with any other pocket relative to the first surface to provide enhanced lubricant retention in each pocket on the first surface. The method further comprises heating the workpiece to between about 200 C. and about 400 C. to temper the first surface and cooling the workpiece to ambient temperature.

US Patent:

20160023573, Jan 28, 2016

Filed:

Jul 25, 2014

Appl. No.:

14/340642

Inventors:

- 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.