Chung Yen Liu

7194863, Mar 27, 2007

Sep 1, 2004

10/931694

Evgeni Ganev - Torrance CA, US
Mike S. Koerner - Rancho Palos Verdes CA, US
Chung Y. Liu - Cerritos CA, US

Honeywell International, Inc. - Morristown NJ

F02C 9/16
F02C 9/26

60773, 60 39281, 13759907, 415 38

One embodiment of the invention provides a turbine control system that adjusts the control thresholds of two-position valves, which provide propellant to the turbine, based on turbine load so as to compensate for increased turbine speed overshoot at low load and the increased turbine speed undershoot at high load. These two-position on-off modulated valves are used in a bang-bang (fully open or fully closed) regulation scheme to eliminate or minimize speed droop by using variable speed bounds implemented as a function of load.

20070218326, Sep 20, 2007

Mar 17, 2006

11/378515

Chung Liu - Cerritos CA, US
Karen Ahle - Manhattan Beach CA, US
David Loeffelholz - Long Beach CA, US

H01M 8/04

429022000, 429034000, 429024000, 429013000

An apparatus and method for controlling humidification device turndown ratio for proton exchange membrane fuel cells includes a proton exchange membrane fuel cell, a humidifier, a water separator for directing water vapor from the proton exchange membrane fuel cell to the humidifier, a bypass valve to regulate vapor flow into the humidifier, a turbo-compressor and control valve for regulating temperature of air flow into the humidifier, and an expansion turbine for recovery of energy from the humidifier and bypass valve.

55963366, Jan 21, 1997

Jun 7, 1995

8/488345

Chung C. Liu - Rancho Palos Verdes CA

TRW Inc. - Redondo Beach CA

H01Q 1310

343770

A low profile slot antenna is provided which includes first and second oppositely disposed metallic plates with a dielectric layer disposed therebetween. An array of horizontal and vertical radiating elements are formed in the first metallic plate. An array of horizontal coupling slots and an array of vertical coupling slots are formed in the second metallic plate. The antenna further includes a planar feed network electrically coupled to the coupling slots. The feed network is connected to a conductive waveguide tube located at the central portion of the antenna. Orthogonal probes couple the waveguide tube to a transceiver. Accordingly, the slot antenna may operate to transmit and receive linearly polarized energy. The antenna may further include a polarization converter for converting between linear and circular polarization so as to allow for antenna operation with single or dual circular polarization energy. The polarization converter may include a pair of Meanderline polarizer sheets disposed above the metallic plates, or alternately may include use of a ninety degree hybrid coupler.

D2864282, Oct 28, 1986

Jun 6, 1984

6/617981

Chung C. Liu - Brea CA

Tatung Company of America, Inc. - Long Beach CA

D23122