The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 1979
Filed:
Oct. 27, 1977
Joseph P Little, Jr, Morton, IL (US);
John H Parks, Peoria, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
An improved fuel-air ratio control apparatus for a supercharged engine having a governor means connected to a fuel adjusting member and a supercharger for supplying air through an intake manifold is disclosed. The control apparatus is directly engageable with the fuel adjusting member and is responsive to intake manifold air pressure and engine oil pressure. The apparatus is inoperative to restrain the adjusting member during start-up of the engine and remains so until such time as a predetermined intake manifold pressure is attained, at which time the control apparatus moves to a position which permits the metering of engine oil therethrough to permit normal governor operation and proportional increases of fuel with air pressure increased. The control apparatus thereafter automatically limits the fuel supplied to the engine, and therefore engine torque rise, during a decrease in engine speed caused by loading on the engine to thereby limit any undesired exhaust smoke. The improvement relates to the amount of torque reduction available from two torque reducer springs, and to the new means for adjustment of the rate of torque reduction using jam nuts.