David Bernard Roth

US Patent:

6971355, Dec 6, 2005

Filed:

Jan 13, 2005

Appl. No.:

11/034649

Inventors:

David B. Roth - Groton NY, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F01L001/18

US Classification:

123 9039, 123 9016, 123 9044

Abstract:

A device having a first and second rocker arm, and a control linkage. The first rocker arm has a first end receiving a first roller and a second end riding on a camshaft lobe. A second roller travels along an upper surface of the first rocker arm. The upper surface of the second rocker arm receives the first roller. When the control linkage is in a first position, the first rocker arm and roller slides along the upper surface of the second rocker arm towards the first end of the rocker arm, such that the valve head has maximum duration and lift from the valve seat. When the control linkage is in a second position, the first roller slides along the upper surface of the second rocker arm towards the second end of the rocker arm such that the valve head has minimum duration and lift from the valve seat.

US Patent:

7322800, Jan 29, 2008

Filed:

Mar 28, 2005

Appl. No.:

11/091567

Inventors:

David B Roth - Groton NY, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F04B 17/00
F04B 35/00

US Classification:

417364, 417437, 417540, 623231, 123 4144, 123 4165, 123 9012, 123196 R, 123565, 180442, 290 1 R

Abstract:

The method provides 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 to at least one variable oil demand accessory. Each of the variable oil demand accessories has an individual pressure regulator. The output of the variable displacement pump is regulated based on the sum of fluid flow required by the engine lubricating system and the engine accessories, regardless of the engine output. The demand for fluid is determined by the individual pressure regulators on each of the engine accessories. In a preferred embodiment, an accumulator stores high-pressure fluid to be used to power the hydraulic accessories.

US Patent:

7568458, Aug 4, 2009

Filed:

Jan 18, 2006

Appl. No.:

11/721679

Inventors:

David B. Roth - Groton NY, US
Braman Wing - Interlaken NY, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F10L 1/34

US Classification:

123 9017, 123 9015, 464160

Abstract:

A variable cam timing system for an engine with at least one camshaft comprising: a housing, a rotor, and a controlled bypass. The housing has an outer circumference for accepting drive force and chambers. The rotor has a connection to a camshaft coaxially located within the housing. The housing and the rotor define at least one vane separating a chamber in the housing into advance and retard chambers. The vane is capable of rotation to shift the relative angular position of the housing and the rotor. The controlled bypass provides fluid communication between the chambers. When the valve is closed, the valve blocks passage between the chambers and when the valve is open fluid flows through the passage extending between the advance chamber to the retard chamber. A method for reducing the valve event is also disclosed.

US Patent:

8464963, Jun 18, 2013

Filed:

Feb 14, 2008

Appl. No.:

12/526961

Inventors:

David B. Roth - Groton NY, US
Olaf E. Weber - Bloomfield Hills MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

B60H 1/22
B60H 1/03
B60H 1/04
F24J 3/00

US Classification:

237 123B, 237 123 R, 237 8 A, 237 8 R, 237 19, 237 34, 126247, 126344, 122 3, 122 26, 123 4144, 1231425 R, 415 1, 415 551

Abstract:

A system for supplying supplemental heat to a vehicle, particularly a vehicle with a diesel engine, A driven viscous plate with different viscous clutch faces on either side is provided between the engine and the coolant pump. One side clutches to the engine structure (ground) to generate heat, and the other side clutches to the coolant pump to vary the pump drive. The two sides are controlled by a valve operated by signals from the engine computer. The valve varies the supply of viscous fluid from a common reservoir independently to both sides of the driven viscous plate. The signal from the engine control unit is based on the instantaneous desired supplemental heat and coolant flow. In another embodiment, two separate viscous clutches are utilized and positioned on opposite sides of the coolant pump.

US Patent:

8495992, Jul 30, 2013

Filed:

Feb 18, 2009

Appl. No.:

12/867263

Inventors:

David B. Roth - Groton NY, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F02M 25/07
F02B 47/08
F02B 33/44

US Classification:

12356813, 12356812, 606052, 60612

Abstract:

A method of controlling exhaust gas flow in an internal combustion engine system, and products and systems using same.

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:

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.