Method of reducing feed gas emissions in an internal combustion

Details Method of reducing feed gas emissions in an internal combustion Method of reducing feed gas emissions in an internal combustion

1996-10-25

1998-05-26

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

F02D 700

Patent

active

057552029

ABSTRACT:
A method of reducing feed gas emissions and improving fuel economy in an internal combustion engine uses a variable cam timing mechanism and an electronically controlled throttle. The method includes: a) predetermining ranges of negligible torque demand, small torque demand, moderate torque demand, high torque demand and maximum torque demand; b) determining actual torque demand; c) using conventional cam phasing and pedal-to-throttle relationship if actual torque demand corresponds with the negligible torque demand range; d) using cam phasing of magnitude in transition between conventional and fully retarded cam phasing and retaining conventional pedal-to-throttle relationship if actual torque demand corresponds with the small torque demand range; e) using fully retarded cam phasing and electronically adjusting throttle position to meet actual torque demand if actual torque demand corresponds with the moderate torque demand range; f) using cam phasing of magnitude in transition between fully retarded and conventional cam phasing and holding throttle position constant if actual torque corresponds with the high torque demand range; and g) using conventional cam phasing and pedal-to-throttle relationship if actual torque corresponds with the maximum torque demand range. Similar schemes are provided for intake advance and exhaust retard strategies.

REFERENCES:
patent: 5161507 (1992-11-01), Terazawa et al.
patent: 5215057 (1993-06-01), Sato et al.
patent: 5233958 (1993-08-01), Knoss et al.
patent: 5241936 (1993-09-01), Byler et al.
patent: 5259349 (1993-11-01), Radlinski
patent: 5349932 (1994-09-01), Boverie et al.
"Development of a Variable Valve Timed Engine to Eliminate the Pumping Losses Associated with Throttle Operation", by Alvon C. Elrod et al, SAE Paper #860537, 1986, 8 pgs.
"Associated Valve Timing--A Possibility to Control Engine Load without Throttle", by Hans Peter Lenz et al, SAE Paper #880388, 1988, 7 pgs.
"A Review Of Vaiable Engine Valve Timing", by C. Gray, SAE Paper #880386, 9 pgs.
"Effect of Variable Engine Valve Timing on Fuel Economy", by T. H. Ma, SAE Paper #880390, 1988, 8 pgs.
"Comparison of Variable Camshaft Timing Strategies at Part Load", by T. G. Leone et al, SAE Technical Paper #960584, International Congress & Exposition, Detroit, Michigan, Feb. 26-29, 1996, pp. 49-67.
"Variable Cam Timing as an Emission Control Tool", by G. B. Kirby Meacham, SAE Paper, 20 pgs.
"Consequences of Modular Controller Development for Automotive Powertrains: A Case Study", by A. G. Stephanopoulou et al, 6 pgs.
"Modeling and Control of a Spark Ignition Engine with Variable Cam Timing", A. G. Stephanopoulou et al, 6 pgs.
"Dual Equal VCT--A Variable Camshaft Timing Strategy for Improved Fuel Economy and Emissions", by R. A. Stein et al, SAE Paper #950975, 13 pgs.

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