Robert D Keefover

US Patent:

6683429, Jan 27, 2004

Filed:

Apr 24, 2002

Appl. No.:

10/128842

Inventors:

Hal Pringle - Bloomfield MI
Robert Keefover - Farmington Hills MI
Michael Halsig - Warren MI
John Duddles - Clarkston MI

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

H02P 104

US Classification:

318466, 318671, 123399, 123361, 123403, 25112911

Abstract:

An electric positional actuator that includes a default device for positioning the actuated device in a default position. The actuator includes an electric motor that controls the rotational position of a shaft through a gear system. When the shaft rotates, it moves a link-bar that actuates the actuated device. A rotational sensor coupled to a printed circuit board detects the position of the shaft, and provide a feedback signal of the shafts position. The default device includes a spring wrapped around the shaft. When the link bar is rotated away from its default position, one leg of the spring remains in contact with a housing spring boss while the other leg of the spring is in contact with the link bar opposing the movement and trying to return the link-bar to the default position.

US Patent:

6854443, Feb 15, 2005

Filed:

Mar 6, 2003

Appl. No.:

10/383194

Inventors:

Robert Keefover - Farmington Hills MI, US
Michael Halsig - Warren MI, US
Hal Pringle - Bloomfield MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F02D009/08

US Classification:

123337, 123399

Abstract:

An electronic throttle control system is described. The system includes a non-contacting sensor stator integrated into an electronic throttle body and is aligned to the sensor rotor attached to the shaft to properly set sensor air gap by assembly aids or by close fit to the throttle body. A motor and vehicle connector is electrically connected to the sensor stator but is allowed to be positioned separately from the sensor stator by means of a flexible interconnect.

US Patent:

7064508, Jun 20, 2006

Filed:

Aug 3, 2005

Appl. No.:

11/195907

Inventors:

Robert D. Keefover - Lake Orion MI, US
Joseph A. Wilson - Royal Oak MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

H02K 17/32

US Classification:

318434, 318432, 318433

Abstract:

A method of using algorithmic control to operate and protect an actuator. The first control strategy uses a soft stop control method where an actuator is driven toward a stop. The actuator control system senses when the actuator is nearing the stop. A control strategy is implemented where the actuator movement is dampened prior to reaching the stop so that the actuator does not strike the stop abruptly. Another control strategy of the present invention involves using the actuator control system to monitor and calculate the integral value of the electrical current flowing though the actuator to determine if the actuator is operating beyond on its suggested operating range. This strategy will help to maximize actuator operation while preventing damage due to overheating.

US Patent:

7086636, Aug 8, 2006

Filed:

Jul 2, 2003

Appl. No.:

10/612329

Inventors:

Robert J. Telep - Livonia MI, US
Robert D. Keefover - Farmington Hills MI, US
Michael J. Halsig - Warren MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F16K 51/00

US Classification:

251 77, 25112912, 251227, 12356824

Abstract:

The present invention is directed to an exhaust gas recirculation valve incorporating a DC motor and a dual poppet valve assembly. A motor is contained inside of the actuator housing. The motor has a rotatable motor shaft with a first gear connected to the end of the motor shaft. A second gear is engageable to the first gear and is configured to rotate in response to the movement of the first gear and the motor shaft. The second gear is also connected to a pin member disposed through the top portion of a shaft member that has two poppet valves disposed on to the shaft. The two ends of the pin member are slidably engageable to either an upwardly or downwardly sloped ramp portion. When the second gear rotates the shaft rotates and moves upward or downward to cause the valve members to move between an open and closed position.

US Patent:

7174998, Feb 13, 2007

Filed:

Oct 15, 2001

Appl. No.:

09/977774

Inventors:

Hal Pringle - Bloomfield MI, US
Robert D. Keefover - Farmington Hills MI, US
Michael J. Halsig - Warren MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F04B 23/00

US Classification:

184 628, 417366

Abstract:

An electric fluid pump for a transmission, transfer case or an oil reservoir. The pump is contained within the transmission, transfer case or engine oil reservoir and has an open housing which allows fluid into the motor for cooling and lubrication.

US Patent:

7182063, Feb 27, 2007

Filed:

Nov 12, 2004

Appl. No.:

10/987105

Inventors:

Robert D. Keefover - Lake Orion MI, US
Michael J. Halsig - Warren MI, US
Hal E. Pringle - Bloomfield MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F02D 9/08
F02D 11/10

US Classification:

123337, 123399, 123520, 12356821, 251305

Abstract:

An electronic throttle control system is described. The system includes a non-contacting sensor stator integrated into an electronic throttle body and is aligned to the sensor rotor attached to the shaft to properly set sensor air gap by assembly aids or by close fit to the throttle body. A motor and vehicle connector is electrically connected to the sensor stator but is allowed to be positioned separately from the sensor stator by means of a flexible interconnect.

US Patent:

7191754, Mar 20, 2007

Filed:

Jan 5, 2005

Appl. No.:

11/029730

Inventors:

Robert D. Keefover - Lake Orion MI, US
Michael J. Halsig - Warren MI, US
Hal E. Pringle - Bloomfield MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F02D 9/08
F02D 11/10

US Classification:

123337, 123399, 251305

Abstract:

A control system having a housing with a bore formed within the housing. A valve member is associated with the bore for controlling the passage of a fluid medium through the bore. An induction sensor is aligned with the valve and facilitates determining the valve position. An inductor is connected to an end of the valve member that is in close proximity to the induction sensor. It is contemplated that this control system can be used in a number of different applications including throttle control systems, turbo actuators, canister purge systems and shift control mechanisms. However, it is within the scope of this invention to incorporate the control system on virtually any type of vehicle system where it is possible to determine the position of a valve utilizing induction sensor technology.

US Patent:

7337764, Mar 4, 2008

Filed:

Feb 27, 2004

Appl. No.:

10/789399

Inventors:

Hal E. Pringle - Bloomfield MI, US
Robert D. Keefover - Farmington Hills MI, US
Michael J. Halsig - Warren MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F02D 9/08
F02D 11/10
F16K 1/22
F16C 17/00

US Classification:

123337, 123399, 251305, 384309

Abstract:

A method of pressure balancing across a bearing adjacent to a pressure differential is described. The method primarily includes providing a bypass port around the bearing for allowing a fluid flow from a first pressure side to a second pressure side. A throttle body for an engine is also described. The throttle body primarily includes: (1) a bearing cooperating with the valve body; and (2) a bypass port around the bearing for allowing the fluid flow from a first pressure side to a second pressure side.