David William Roth

US Patent:

6889634, May 10, 2005

Filed:

Apr 16, 2004

Appl. No.:

10/826104

Inventors:

David B. Roth - West Bloomfield MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F01M001/02

US Classification:

123 4144, 123 4165, 123565, 123 9012, 123196 R, 180442, 623231, 290 1 R

Abstract:

A method of providing hydraulic pressure for mechanical work from an engine lubricating system in an internal combustion engine by supplying oil to an engine lubrication gallery for lubricating the engine and at least one variable oil demand accessory. Each of the variable oil demand accessories have individual pressure regulators. The output of the variable displacement pump is regulated to the sum of fluid flow required by the engine lubricating system and the demand for fluid generated by the individual pressure regulators on each of the engine accessories, regardless of the engine output.

US Patent:

7171936, Feb 6, 2007

Filed:

Oct 23, 2003

Appl. No.:

10/691954

Inventors:

Wolfgang Rein - Milford MI, US
David Roth - West Bloomfield MI, US
Jonathan Douglas - Russellville TN, US

Assignee:

Mahle Technology, Inc. - Farmington Hills MI

International Classification:

F02F 3/00
F02F 3/10

US Classification:

1231934, 29888048

Abstract:

The present invention relates to a piston adapted for reciprocal movement within the cylinders of an internal combustion engine. The piston includes a body having a crown formed at the uppermost margins of the body and a skirt, depending from the crown, adapted for relative sliding motion with respect to the cylinder. The piston further includes a coating bonded to the piston skirt so as to be juxtaposed between the skirt and the cylinder. The coating has a plurality of recesses formed thereon so as to define a predetermined pattern of recesses on the surface of the skirt that retains lubricant between the skirt and the cylinder wall. The coating may also direct lubricant along the outer circumference of the piston skirt during reciprocal movement of the piston within a cylinder. A method of applying the coating to the piston skirt is also disclosed.

US Patent:

8630787, Jan 14, 2014

Filed:

Jul 6, 2010

Appl. No.:

12/830834

Inventors:

John Shutty - Clarkston MI, US
Volker Joergl - Breitenfurt, AT
Volker Mueller - Vendersheim, DE
David B. Roth - Groton NY, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

G06F 19/00
F02M 25/07
F02B 47/08
F02B 33/44

US Classification:

701108, 12356821, 606052

Abstract:

Methods and products for controlling exhaust gas recirculation.

US Patent:

20040107922, Jun 10, 2004

Filed:

Dec 6, 2002

Appl. No.:

10/310781

Inventors:

David Roth - West Bloomfield MI, US

Assignee:

Daimler Chrysler Corporation

International Classification:

F01P007/14

US Classification:

123/041100

Abstract:

A dual temperature control system as part of an engine cooling system. In one aspect, a valve is regulated as a function of engine load and disposed in a by-pass line between the radiator and the coolant pump. The valve is designed to normally block the by-pass line, but permits coolant to by-pass the thermostat and be conveyed from the radiator to the engine when the load of the engine approaches a wide-open-throttle condition. In another aspect, both high-temperature and low-temperature thermostats are employed and a normally closed valve is actuated when the load of the engine approaches a wide-open-throttle condition to permit coolant to be conveyed through the low-temperature thermostat and on to the engine.

US Patent:

20050241796, Nov 3, 2005

Filed:

Apr 29, 2004

Appl. No.:

10/835800

Inventors:

Markus Lettmann - Northville MI, US
David Roth - West Bloomfield MI, US
Thomas Glas - Plymouth MI, US
Norbert Schneider - South Lyon MI, US
Giang Nguyen - Northville MI, US
Rodrigo Consentino - Mogi Mirim, BR

International Classification:

B22D015/00

US Classification:

164127000, 164352000

Abstract:

For the production of piston pins having a hard peripheral area, a relatively inexpensive chill casting method is used. A chill form having a mold cavity for a piston pin is embedded in a casting mold, cast iron is poured into the mold cavity of the chill form, and then the peripheral area of the piston pin that results from this process is cooled by means of the chill form, is white-solidified, and thereby forms a hard wear-resistant surface.

US Patent:

20090044788, Feb 19, 2009

Filed:

Jun 4, 2008

Appl. No.:

12/132837

Inventors:

John Shutty - Clarkston MI, US
Philip S. Keller - Clarkston MI, US
Thomas Grissom - Dexter MI, US
David White - Dryden NY, US
David B. Roth - Groton NY, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F02B 33/00
F02M 37/04

US Classification:

1235591, 123495

Abstract:

One implementation of an air boost system for an engine includes a boost device and an accumulator adapted to store pressurized fluid and selectively provide pressurized fluid to the boost device. A pump may deliver fluid under pressure to one or both of the accumulator and the boost device in at least some operating conditions. A first control valve may be disposed between the pump and the accumulator to control fluid flow to the accumulator, and a bypass may be provided between the pump and the first control valve. The bypass may, in at least some operating conditions, permit at least some of the pressurized fluid from the pump to bypass the accumulator and be delivered to the boost device. In one form, the accumulator is carried by the boost device in a compact unit.

US Patent:

20110276204, Nov 10, 2011

Filed:

Aug 15, 2008

Appl. No.:

12/673286

Inventors:

John Shutty - Clarkston MI, US
David B. Roth - Groton NY, US
Volker Joergl - Breitenfurt, AT
Robert Czamowski - Oxford MI, US

Assignee:

BORGWARNER INC. - Auburn Hills MI

International Classification:

G06F 19/00
B62D 5/06
B60L 15/00

US Classification:

701 22, 701 99, 701 41, 180 65265, 903930

Abstract:

According to one implementation of an engine system, a power device is selectively actuated to provide energy to a storage device. Energy from the storage device is selectively provided to a boost assist device to supplement the normal energy supply to a boost device and enable an increased power output of the engine in at least certain engine or vehicle operating conditions. In one form, the power device may be a source of electrical energy and the storage device is capable of storing an electrical charge. In another form, the power device is a fluid pump and the storage device is capable of storing pressurized fluid. Various methods may be employed to control operation of the power device and energy storage in the storage device.

US Patent:

42854709, Aug 25, 1981

Filed:

Aug 3, 1979

Appl. No.:

6/063473

Inventors:

David W. Roth - Detroit MI

Assignee:

The 2500 Corporation - Lathrup Village MI

International Classification:

B05B 110
B60S 152

US Classification:

239284A

Abstract:

The specification discloses a self-contained headlamp washer system which consists of an electrical pump assembly, flexible washer fluid container, headlamp washer assembly, and a tubular hosing connecting means. Two (2) embodiments of the invention are disclosed by applicant, i. e. : a self-contained headlamp washer system in which the headlamp washer nozzle assembly is contained within and by the headlamp bezel, and a headlamp washer nozzle assembly which is of a two-piece construction independent of the headlamp bezel, said washer nozzle assembly is capable of being either attached or clipped on to any existing headlamp bezel. In both disclosed embodiments, applicant prefers that the headlamp washer nozzle assembly be made from a molded plastic material of high strength and impact resistant characteristics. The headlamp washer nozzle assembly is specifically designed so that no part thereof protrudes on, or covers any portion of the vehicle headlamp, and has a specially constructed long fluid passageway and washer fluid discharge apertures which allow the placement of the washer fluid over the entire surface of the vehicle headlamps in a controlled and more effective cleaning pattern.