Ronald Martelli Phones & Addresses
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3228 N Territorial Rd W, Ann Arbor, MI 48105 (734) 623-1806
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Presque Isle, MI
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Bloomfield Hills, MI
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Whitmore Lake, MI
Publications
Us Patents
Adaptive Closed-Loop Electronic Fuel Control System With Fuel Puddling Compensation
View pageUS Patent:
53755839, Dec 27, 1994
Filed:
Dec 14, 1992
Appl. No.:
7/990382
Inventors:
Garth M. Meyer - Dearborn MI
Rogelio G. Samson - Bloomfield Hills MI
Ronald L. Martelli - Bloomfield MI
Rogelio G. Samson - Bloomfield Hills MI
Ronald L. Martelli - Bloomfield MI
Assignee:
Ford Motor Company - Dearborn MI
International Classification:
F02D 4114
US Classification:
123681
Abstract:
An air/fuel mixture control system for an internal combustion engine uses a closed-loop controller which varies the air/fuel mixture in response to the oxygen level in the engine's exhaust emissions to achieve stoichiometry. The oxygen level sensor produces a binary signal indicating either a rich or a lean mixture. The controller responds by generating a fuel delivery rate control signal which has three components: an integral (ramp function) component, a proportional step function component which abruptly jumps the control signal to an intermediate level at the time of each oxygen level change, and a differential overshoot component which (1) injects a compensating volume of fuel into the engine intake at the onset of each lean signal, and (2) subtracts a compensating volume of fuel from the intake at the onset of each rich signal. The compensating fuel volume minimizes the effects of fuel puddling in the intake manifold to reduce the effective closed loop delay time for better control. The magnitude of the compensating volume may be altered in response to detected engine speed and/or load, or alternatively may be adaptively varied to achieve maximum closed loop cycling frequencies.
Stratified Exhaust Residual Engine
View pageUS Patent:
59185775, Jul 6, 1999
Filed:
Feb 4, 1998
Appl. No.:
9/018364
Inventors:
Ronald Lee Martelli - Ann Arbor MI
Christopher Warren - Farmington Hills MI
William Francis Stockhausen - Northville MI
Christopher Warren - Farmington Hills MI
William Francis Stockhausen - Northville MI
Assignee:
Ford Global Technologies, Inc. - Dearborn MI
International Classification:
F02B 1700
US Classification:
123295
Abstract:
A variable valve controlled engine causes the inducted exhaust residual to flow from the exhaust port(s) into specific regions of the combustion chamber and remain substantially separate from the air-fuel mixture, thereby creating stratification. The exhaust gas remains substantially on the piston surface and along the entire cylinder wall for at least a portion of the cylinder, with the air-fuel mixture occupying the remaining portion of the chamber.