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:
Nov. 16, 1982
Filed:
Jan. 22, 1981
Edward G Day, Rochester, NY (US);
Gordon R Paddock, Rochester, NY (US);
Edward H Seidewand, Rochester, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An air management valve in the exhaust emission control system for the engine of an automotive vehicle is operative to selectively control secondary air flow to the exhaust manifold next adjacent to the exhaust ports of the engine, to the center of a dual bed catalytic converter and to the atmosphere. The air management valve, adapted to be connected to an engine driven air pump, includes three air pressure operated valves, that is, a port air control valve controlling air flow to the exhaust ports, a proportional air control valve controlling divert air flow to the atmosphere and a pressure relief valve for the pressure relief divert air flow to the atmosphere, a flow control orifice controlling air flow to the converter, a port air control and a solenoid valve arranged to control pressure on one side of the port air control valve, a proportion air control solenoid valve arranged so as to control the flow of exhaust gases to one side of the proportional air control valve whereby to effect operation of this valve as a proportional regulator so as to maintain a constant pressure ratio between air pump pressure and exhaust pressure at the center of the converter.