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:
Apr. 11, 1978
Filed:
Jan. 31, 1977
Johannes-Gerhard Bertling, Vaihingen, DT;
Hans Zeller, Grafenau, DT;
Johannes Brettschneider, Ludwigsburg, DT;
Robert Bosch GmbH, Stuttgart, DT;
Abstract
The induction manifold of an internal combustion engine is provided with an air bypass conduit which has an air flow metering valve which is controlled by the same differential pressure experienced by the air responsive element of the carburetor in the induction tube. The pressure drop across this valve is further influenced by a second air metering valve acting as a pressure control valve, also located in the bypass line downstream of the first metering valve. A regulator responsive to engine conditions controls valves which cause selective admission of different pressures to the actuation chamber of the pressure control valve to regulate the amount of bypassed air.