Joseph E Robbins

US Patent:

6712028, Mar 30, 2004

Filed:

Mar 26, 2003

Appl. No.:

10/397082

Inventors:

Joseph E. Robbins - Mayville MI
Chandran B. Santanam - Rochester Hills MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F01P 714

US Classification:

123 4108, 123 4144

Abstract:

A cooling system has a system bypass to reduce parasitic losses in an internal combustion engine. The system bypass has a diverter valve actuated by a control module to selectively control the amount of coolant flow through the engine without regard to the speed of the water pump. As less coolant is needed to cool the engine, the diverter valve directs more coolant through the bypass to be recirculated to the water pump. The energy absorbed by the water pump is reduced by the reduced coolant flow, which increases the efficiency of the system and reduces engine parasitic losses.

US Patent:

8510942, Aug 20, 2013

Filed:

Oct 8, 2008

Appl. No.:

12/247287

Inventors:

Shekhar G. Wakade - Grand Blanc MI, US
Frederick J. Rozario - Fenton MI, US
Glenn E. Clever - Washington MI, US
Joseph E. Robbins - Mayville MI, US
Stephen R. Kornblum - Walled Lake MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

B21D 53/84

US Classification:

298881, 419 48, 419 52

Abstract:

An automotive engine component and method of producing the same. The method uses dynamic magnetic compaction to form components, such as camshaft lobes, with non-axisymmetric and related irregular shapes. A die is used that has an interior profile that is substantially similar to the non-axisymmetric exterior of the component to be formed such that first and second materials can be placed into the die prior to compaction. The first material is in powder form and can be placed in the die to make up a first portion of the component being formed, while a second material can be placed in the die to make up a second portion of the component. The second material, which may possess different tribological properties from those of the first material, can be arranged in the die so that upon formation, at least a portion of the component's non-axisymmetric exterior profile is shaped by or includes the second material.

US Patent:

8568259, Oct 29, 2013

Filed:

Sep 11, 2009

Appl. No.:

12/557589

Inventors:

Joseph E. Robbins - Mayville MI, US
William C. Deneszczuk - Saline MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F16H 7/12

US Classification:

474135

Abstract:

A belt tensioner for a starter generator drive is provided. The belt tensioner comprises a carrier having a pivot defining a first pivot axis at a first end and a carrier arm extending from the pivot to terminate in a second end. An idler pulley is rotatably mounted to the carrier for rotation about the first pivot axis and a tensioner pulley is rotatably mounted to the carrier at the second end of the carrier arm for rotation about a second axis. The second axis extends parallel to and is arcuately moveable relative to, the first pivot axis. A tensioner is in communication with the second end of the carrier arm for biasing the carrier arm and the tensioner pulley against a drive belt for tensioning the drive belt engaged by the idler pulley and the tensioner pulley.

US Patent:

20100189587, Jul 29, 2010

Filed:

Jan 26, 2009

Appl. No.:

12/359391

Inventors:

Shekhar G. Wakade - Grand Blanc MI, US
Frederick J. Rozario - Fenton MI, US
Glenn E. Clever - Washington MI, US
Joseph E. Robbins - Mayville MI, US

International Classification:

B22F 3/087

US Classification:

419 66, 425 78

Abstract:

Cam lobe packs and methods of producing the same. The method uses a tool made up of an insert disposed within a sleeve such that both are responsive to a dynamic magnetic compaction (DMC) pressure source. The insert defines a substantially axisymmetric exterior surface and a cam lobe-shaped interior surface that can receive a compactable material such that upon DMC, the material is formed into the shape of the cam lobe. The sleeve is disposed about the insert and defines a substantially axisymmetric exterior surface such that an axisymmetric compaction imparted to the sleeve by the DMC pressure source forms the desired shaped cam lobe. The tool is configured such that individual tool members corresponding to one or more of the cam lobes can be axially aligned so that an aggregate interior surface is formed that defines an exterior surface profile of a camshaft being formed.