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:
May. 04, 1982
Filed:
Oct. 15, 1979
Werner Banzhaf, Sindelfingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An apparatus for controlling the composition of the operational mixture in internal combustion engines. Air quantity is controlled to correspond to an arbitrarily settable fuel quantity, by creating a set-point fuel quantity signal from an actual value air quantity signal, via a performance graph, the fuel signal taking the form of a correspondingly set metering cross section in a fuel supply line. A differential pressure valve, connected across the metering cross section, creates a hydraulic control pressure for actuating an air throttle valve in accordance with the deviation of the pressure drop across the metering cross section from a set-point value which is kept constant. During overrunning, the pressure drop becomes zero and the throttle valve is fully opened by hydraulic control pressure supplied through a pressure-actuated valve which opens when the pressure downstream of the metering cross section rises to a value indicating an overrunning condition.