David T 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:

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:

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:

53377044, Aug 16, 1994

Filed:

Sep 29, 1993

Appl. No.:

8/128181

Inventors:

David B. Roth - Bloomfield MI

Assignee:

Chrysler Corporation - Highland Park MI

International Classification:

F01P 714

US Classification:

123 411

Abstract:

An improved cooling system for an internal combustion engine in an automotive vehicle which utilizes recirculating liquid coolant and provides an initial engine warm-up flow circuit extending: from a coolant pump, through cooling passages in the cylinder head, through a heat exchanger used to warm a passenger compartment, and back to the pump whereby a temperature responsive flow control valve or thermostat prohibits a flow of coolant from the cylinder head to cooling passages in the engine block which provides adequate cooling of the upper surfaces of the combustion chamber which are formed by the cylinder head while promoting a relatively rapid heating of the surfaces of the engine cylinders formed by the block. After the warm-up period, the thermostat opens to permit coolant flow into a down-flow passage between the cylinder head coolant passages and the engine block coolant passages resulting in a normal engine cooling circuit extending: from the coolant pump, through the cylinder head cooling passages, then through the engine block cooling passages, through a vehicle radiator, and back to the coolant pump. The improved cooling system actively cools the upper surfaces of the combustion chamber formed by the cylinder head both during an engine warm-up period and during normal engine operation which promotes complete combustion of the fuel and inhibits knock and pre-ignition.

US Patent:

60034882, Dec 21, 1999

Filed:

Jul 15, 1998

Appl. No.:

9/115935

Inventors:

David B. Roth - Bloomfield MI

Assignee:

Chrysler Corporation - Auburn Hills MI

International Classification:

F02B 300

US Classification:

123298

Abstract:

An internal combustion engine has a piston reciprocable in a cylinder toward and away from a combustion chamber. An intake valve admits air into the combustion chamber. An exhaust valve discharges products of combustion from the combustion chamber. A fuel injector is positioned to direct a plume of fuel into the combustion chamber along a path and in a direction to impinge upon the exhaust valve. The piston has an end face formed with a concave recess or pocket adjacent the exhaust valve. The exhaust valve is constructed and arranged to deflect fuel impinging thereon into the recess. The recess being shaped to redirect fuel back toward the path of the plume of fuel.