DAVID B SMITH
Engineering in Montgomery, MA
License number
Massachusetts 33742
Issued Date
Feb 26, 1988
Expiration Date
Jun 30, 2018
Type
Mechanical Engineer
Address
Address
Montgomery, MA 01085
Personal information
See more information about DAVID B SMITH at radaris.comName
Address
Phone
4 Eliot St #A, Natick, MA 01760
4 Cabot Cir, Westborough, MA 01581
49 Pleasant St, E Longmeadow, MA 01028
4 Phillips St, Woburn, MA 01801
4 Hopkins Ave, Beverly, MA 01915
Professional information
See more information about DAVID B SMITH at trustoria.com
Method For Exhaust Gas Temperature Control Via Engine Braking In An Internal Combustion Engine
Method For Exhaust Gas Temperature Control Via Engine Braking In An Internal Combustion Engine
US Patent:
2008021, Sep 4, 2008
Filed:
Feb 15, 2008
Appl. No.:
12/071110
Inventors:
David B. Smith - Westfield MA, US
International Classification:
F02D 13/04
US Classification:
123321, 123323, 60320
Abstract:
Systems for, and methods of, controlling exhaust gas temperature in a multi-cylinder internal combustion engine during positive power operation of the engine are disclosed. Control of exhaust gas temperature may be desired to improve emissions performance in the engine, which is often dependent upon exhaust gas temperature. One or more temperature probes may be used to first determine the actual exhaust gas temperature of the engine while it is operated in a positive power mode. Next, an ECM or similar device may be used to determine a temperature difference between the actual exhaust gas temperature and a desired exhaust gas temperature for emissions performance. Based on the determined temperature difference, one or more cylinders of the engine may continue to be operated in positive power mode while one or more cylinders of the engine are switched to operating in a selected engine braking mode. The operation of some cylinders in positive power mode while operating other cylinders in engine braking mode may cause the actual exhaust gas temperature to change and more closely match the desired exhaust gas temperature.
System And Method For Hydraulic Valve Actuation
System And Method For Hydraulic Valve Actuation
US Patent:
2007012, Jun 7, 2007
Filed:
Dec 1, 2005
Appl. No.:
11/290518
Inventors:
Zhou Yang - South Windsor CT, US
Andrew Brzoska - Burlington CT, US
Brian Ruggiero - East Granby CT, US
David Smith - Westfield MA, US
James Judd - Union SC, US
Neil Fuchs - New Hartford CT, US
Michael Dailey - Bloomfield CT, US
Andrew Brzoska - Burlington CT, US
Brian Ruggiero - East Granby CT, US
David Smith - Westfield MA, US
James Judd - Union SC, US
Neil Fuchs - New Hartford CT, US
Michael Dailey - Bloomfield CT, US
International Classification:
F01L 9/02, F01L 1/34
US Classification:
123090120, 123090160
Abstract:
Systems and methods for hydraulic and/or variable valve actuation of engine valves are disclosed. An embodiment of the present invention may include a hydraulic valve actuation system operatively connected to an engine valve. First and second control valves may be operatively connected to the hydraulic valve actuation system and adapted to selectively release hydraulic fluid from the hydraulic valve actuation system independent of one another. The first control valve is preferably a solenoid actuated trigger valve and the second control valve is preferably a mechanically or hydraulically actuated valve.
Compact Lost Motion System For Variable Value Actuation
Compact Lost Motion System For Variable Value Actuation
US Patent:
2005025, Nov 17, 2005
Filed:
Apr 11, 2005
Appl. No.:
11/102804
Inventors:
Richard Vanderpoel - Bloomfield CT, US
Zhou Yang - South Windsor CT, US
Andrew Brzoska - Burlington CT, US
Brian Ruggiero - East Granby CT, US
David Smith - Westfield MA, US
James Judd - Ellington CT, US
Neil Fuchs - New Hartford CT, US
Michael Dailey - Bloomfield CT, US
Steven Ernest - Windsor CT, US
Zhou Yang - South Windsor CT, US
Andrew Brzoska - Burlington CT, US
Brian Ruggiero - East Granby CT, US
David Smith - Westfield MA, US
James Judd - Ellington CT, US
Neil Fuchs - New Hartford CT, US
Michael Dailey - Bloomfield CT, US
Steven Ernest - Windsor CT, US
International Classification:
F02D013/04, F01L001/34
US Classification:
123321000, 123090160, 123090220
Abstract:
Lost motion systems and methods for providing engine valves with variable valve actuation for engine valve events are disclosed. The system may include a master piston hydraulically linked to a slave piston, and a dedicated cam operatively connected to the master piston. The slave piston may be disposed substantially perpendicular to the master piston in a common housing. The slave piston is adapted to actuate one or more engine valves. The slave piston may incorporate an optional valve seating assembly into its upper end. A trigger valve may be operatively connected to the master-slave hydraulic circuit to selectively release and add hydraulic fluid to the circuit.