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:
Sep. 11, 1990
Filed:
Apr. 12, 1989
Applicant:
Inventor:
Melvin J Helmich, Grove City, PA (US);
Assignee:
Cooper Industries, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
123 / ; 123577 ; 123576 ; 123472 ;
Abstract
A dual fuel engine system and method of operating the engine reduces emission rates of polutants. The dual fuel engine includes a fuel oil supply connected to the engine and a fuel gas supply connected to the engine. Means connected between the fuel oil supply and the engine inject low levels of diesel fuel into the engine. In particular, the injection of diesel fuel is limited to pilot injection quantities only. The exhaust emission of NOx is maintained at less than 1 GM/HP-HR, where natural gas is used as the primary fuel, and less than 0.5 GM/HP-HR where digester gas is used as the primary fuel.