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. 24, 1979
Filed:
Feb. 14, 1978
Lothar Bendig, Ludwigsburg, DE;
Rolf Fusser, Freiberg am Neckar, DE;
Filterwerk Mann & Hummel GmbH, Ludwigsburg, DE;
Abstract
A device for automatically regulating the intake air temperature of a carburetor-equipped internal combustion engine whose air intake system includes a flow proportioning pivotable flapper in a duct junction admitting cold raw air and/or preheated raw air to the air intake filter, depending on the ambient temperature, the flapper position being controlled by a pneumatic membrane actuator receiving negative pressure from the engine intake manifold, via a vacuum line with a thermostat-controlled pressure relief valve which reads the temperature of the raw air mixture. In the cold air intake duct is arranged a temperature-responsive unit, in the form of either a wax thermostat or a bimetallic spiral and disc cam, which serves as a position-adjustable stop thereby preventing the flapper from completely closing the warm air intake duct, when the engine takes in cold air, operating at full load.