JOHN MORGAN MARSHALL, M.D.
Physical Therapy in Novi, MI
License number
Michigan 21378
Category
Medical Practice
Type
Physical Medicine & Rehabilitation
Address
Address
46325 Mile Rd. STE. 100, Novi, MI 48377
Phone
(877) 784-3667
(248) 869-3982 (Fax)
(248) 869-3982 (Fax)
Professional information
Engine Exhaust Gas Recirculating Control
US Patent:
3930475, Jan 6, 1976
Filed:
Aug 24, 1973
Appl. No.:
5/391411
Inventors:
John A. Lewis - Detroit MI
John R. Marshall - Novi MI
John R. Marshall - Novi MI
Assignee:
Ford Motor Company - Dearborn MI
International Classification:
F02m 2506
US Classification:
123119A
Abstract:
The engine has a duct connecting the gases in the exhaust gas crossover passage to the intake manifold, the duct normally being closed by a valve that is opened by manifold vacuum that is modulated as a function of carburetor throttle blade opening and connected to the duct past an air-bleed device that normally is open and closed against a spring force by unmodulated manifold vacuum below a predetermined level so that the gas recirculating valve opening signal force varies directly with manifold vacuum decreases to prevent recirculation during engine idle and cruising and wide-open throttle operations while providing controlled operation in the engine accelerating range between.