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:
Jan. 10, 1995
Filed:
Nov. 23, 1993
Reiner Pischke, Bad Friedrichshall, DE;
Annette Luther, Weinsberg, DE;
Audi AG, Ingolstadt, DE;
Abstract
An apparatus for controlling the amount of exhaust gas recycled has a pneumatic valve 7, coupled to a pressure chamber 12 which is connected, on the one hand, over a pipeline 14 with the intake manifold 2 of the internal combustion engine and, on the other, for changing the exhaust gas recycling rate, with the atmosphere over a pipeline 16, through an electromagnetic valve 17. The duty cycle of the cycle valve 17 is varied by electronic control equipment 20 in accordance with the desired rate of recycled exhaust gas. An elevation correction is attained for the recycling rate because the atmospheric pressure is determined from the relationship between the aspirated air mass, determined by an air-mass meter 4 and the throttle valve angle, determined by a sensor 21. The duty cycle of the valve 17 is changed so that the recycling rate for the exhaust gas, which also depends on the load and the rotational speed of the engine remains essentially constant.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile