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. 15, 1986
Filed:
Mar. 15, 1985
Hans P Lenz, Vienna, AT;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method and apparatus for shielding an air flow rate meter, in particular a hot wire air flow rate meter, or protecting it, from air column fluctuations in the intake tube on an internal combustion engine arising from the non-uniform aspiration of air by the engine. Before the air flow rate meter as viewed from the inlet valve area of the intake tube, elastic diaphragm means are disposed such that they form an interior chamber in the intake tube which is sealed off from the atmosphere on the one hand, yet is embodied such that a virtually constant pressure, which corresponds to atmospheric pressure, can be maintained in it. As a result, pressure waves arriving from the intake tube are absorbed prior to contact with the air flow rate meter and transmitted in terms of their energetic effects to the ambient air, so that the air flow rate meter is uncoupled from the air column fluctuations in the intake tube that are generated by the engine.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile