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:
Jul. 10, 2007
Filed:
Jun. 08, 2006
Applicant:
Joseph B. Gehret, Jr., Lynnfield, MA (US);
Inventor:
Joseph B. Gehret, Jr., Lynnfield, MA (US);
Assignee:
Tecogen, Inc., Waltham, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B60T 7/12 (2006.01); F02D 41/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for controlling internal combustion engine emissions, including the steps of reading signals from sensors in an engine exhaust manifold and catalytic converter exhaust, an upstream one of the sensors being provided with an air-fuel mixture setpoint, comparing signal values with previous average values and automatically adjusting the air-fuel mixture set point to vary the fuel mixture fed to the engine.