Kevin S Chen

US Patent:

6624945, Sep 23, 2003

Filed:

Feb 12, 2001

Appl. No.:

09/781825

Inventors:

Shanhui Fan - Palo Alto CA
John D. Joannopoulos - Belmont MA
George B. Kenney - Medfield MA
Michal Lipson - Waltham MA
Kevin M. Chen - Cambridge MA
Lionel C Kimerling - Concord MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G02B 2700

US Classification:

359584, 359587, 359580, 359578, 359577

Abstract:

An electromagnetic wavelength filter that allows the transmission of electromagnetic energy within a narrow range of wavelengths while reflecting incident electromagnetic energy at other wavelengths. The filter includes at least one cavity region; and at least two reflectors surrounding the at least one cavity region, at least one of the reflectors being an omni-directional reflector. The omni-directional reflector includes a structure with a surface and an index of refraction variation perpendicular to the surface, and the omni-directional reflector is specifically configured to exhibit high omni-directional reflection for a predetermined range of frequencies of incident electromagnetic energy for any angle of incidence and any polarization.

US Patent:

6846509, Jan 25, 2005

Filed:

Nov 21, 2001

Appl. No.:

09/991438

Inventors:

Kevin M. Chen - Santa Clara CA, US
Lionel C. Kimerling - Concord MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

B05D 302
B05D 512
C23C 1400

US Classification:

427 66, 427 74, 4271263, 427166, 427380, 20419215, 20419226

Abstract:

A system for producing Erbium Oxide thin films with increased photoluminescence. The system includes a depositing stage for forming Erbium Oxide molecules by reacting Erbium sputtered atoms with Oin a gas phase and creating the Erbium Oxide thin film by depositing the Erbium Oxide molecules on a substrate coated with Silicon Oxide. The system further includes an annealing stage for annealing the Erbium Oxide thin films by utilizing a low temperature treatment for a specified amount of time and temperature followed by a high temperature treatment for another specified amount of time and temperature, wherein the crystallinity of the thin films has improved.

US Patent:

7886524, Feb 15, 2011

Filed:

Oct 24, 2005

Appl. No.:

11/256858

Inventors:

Michiel van Nieuwstadt - Ann Arbor MI, US
Kevin Chen - Canton MI, US
Kevin Murphy - Troy MI, US
Ognyan Yanakiev - Canton MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F01N 3/00

US Classification:

60285, 60284, 60286, 60273, 60301

Abstract:

A method for improving engine control during a regeneration of an exhaust gas after treatment device is described. According to one aspect of the description, engine air amount and engine fuel amount may be adjusted based on data from a previously executed regeneration of an exhaust gas after treatment device.

US Patent:

8047184, Nov 1, 2011

Filed:

Jul 31, 2009

Appl. No.:

12/533336

Inventors:

Daniel Joseph Styles - Canton MI, US
Kevin Chen - Canton MI, US
David Curtis Ives - Ann Arbor MI, US
Frank M Korpics - Belleville MI, US
Norman Hiam Opolsky - West Bloomfield MI, US
Timothy Webb - Ann Arbor MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F02B 47/08
F02B 47/00

US Classification:

12356812

Abstract:

A system and method for controlling an engine control an EGR cooler bypass valve to divert at least a portion of EGR flow around an EGR cooler when operating under cooler fouling/plugging conditions, such as during idle, off-idle, exhaust system warm up and DPF regeneration or other post injection operation with EGR gas temperature below a corresponding threshold or with EGR low-temperature coolant temperature below a corresponding threshold. The system and method reduce exhaust gases passing through the EGR cooler that contain a high concentration of unburned or partially unburned fuel when the temperature in the EGR system is lower than the fuel condensation temperature.

US Patent:

8464520, Jun 18, 2013

Filed:

Oct 15, 2009

Appl. No.:

12/579627

Inventors:

Kevin Chen - Canton MI, US
Christopher Oberski - Plymouth MI, US
Norman Hiam Opolsky - West Bloomfield MI, US
Peter Mitchell Lyon - Birmingham MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F01N 3/00

US Classification:

60295, 60274, 60297, 60311

Abstract:

Termination of regeneration of a particulate filter may be based on a variable percent threshold of stored particulate, where the percent threshold of stored particulate depends on a current soot burn rate. In one example approach, a method for controlling regeneration of a diesel particulate filter comprises: terminating regeneration based on a particulate burning rate; wherein the particulate burning rate is based on operating conditions of the diesel particulate filter; the operating conditions including an amount of stored particulate in the diesel particulate filter and a temperature of the diesel particulate filter.

US Patent:

8607549, Dec 17, 2013

Filed:

Jan 21, 2010

Appl. No.:

12/691565

Inventors:

Jian Kong - Canton MI, US
Kevin Chen - Canton MI, US
Kirk Andrew Parrish - Grass Lake MI, US
Jeff Malcolm Travis - Dexter MI, US
Christopher Oberski - Plymouth MI, US
Michiel J. Van Nieuwstadt - Ann Arbor MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F01N 3/00

US Classification:

60295, 60286, 60297, 60303, 60311

Abstract:

In one approach a method for operating an engine including a DPF is provided. The method includes adjusting a post fuel injection amount based on a rate of change of engine torque during DPF regeneration. As one example, the adjusting includes reducing the amount when the rate of change is positive, and increasing the amount when the rate of change is negative. Furthermore, the method may also include delivering exhaust gas to a turbocharger turbine, to an oxidation catalyst, and then a DPF, the adjusting of the post fuel injection further based on thermal inertia of the turbocharger.

US Patent:

20060078293, Apr 13, 2006

Filed:

Feb 4, 2005

Appl. No.:

11/051415

Inventors:

Richard Wyman - Sunnyvale CA, US
Kevin (Jean-Huang) Chen - Cupertino CA, US

International Classification:

H04N 5/783

US Classification:

386068000, 386131000

Abstract:

A system and method that repeat video images in a deinterlacing system. The method comprises detecting a signal requesting an input video image be repeated and determining the desired number of repetitions. The input video image may then be processed to generate an output video image and the output video image may be repeated the desired number of repetitions. The input video images following the repeated image may be held until the repeating is completed, and may then be processed and displayed. Repeating the video image may be utilized to achieve different playback modes such as, for example, slow motion, pause, and video rate conversion.

US Patent:

20110167805, Jul 14, 2011

Filed:

Aug 17, 2010

Appl. No.:

12/858196

Inventors:

Kevin Chen - Canton MI, US

Assignee:

FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI

International Classification:

F01N 9/00
F01N 3/20

US Classification:

60286

Abstract:

Various systems and methods are described for controlling a diesel aftertreatment system coupled to an exhaust system of an engine which includes a selective catalytic reduction (SCR) catalyst and a diesel particulate filter (PF). In one example, a threshold amount of urea injected to the SCR catalyst is adjusted based on an amount of soot generated by the engine and the total amount of urea injected to the SCR catalyst is limited by the threshold. For example, when the amount of soot generated by the engine is below a first threshold amount, the threshold amount of urea injection is reduced. When the amount of soot generated by the engine is above a second threshold amount, which is greater than the first threshold amount, the threshold amount of urea injection is increased.