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. 03, 1984
Filed:
Mar. 28, 1983
Pierburg GmbH & Co., KG, Neuss, DE;
Abstract
A fuel supply system for a mixture-compressing internal combustion engine employs a controllable differential pressure for the removal of air from a main air duct into a carrier air duct for proportioning the fuel to be used. The fuel system includes a fuel proportioning device and a vane pump for withdrawing a carrier air flow from the main air duct and for transporting the fuel through feed lines to the internal combustion engine. The pressure of the air at the fuel outlet and the differential pressure for fuel proportioning is controlled by a differential pressure valve located in the carrier air duct spaced from the main air duct. The differential pressure valve has a diaphragm dividing the interior of the valve into chambers with one side of the diaphragm acted upon by the air pressure in the carrier duct between the differential pressure valve and the main air duct. The other side of the diaphragm is acted upon by the pressure in the carrier air duct downstream from the differential pressure valve and also by a variable force depending on the parameters of the engine. To prevent pulsations in the air flow from disadvantageously affecting the differential pressure valve, the diaphragm in the valve is separated by a partition from a space in which such pulsations are effective. The air pressure in the carrier air duct upstream from the differential pressure valve acts in the space and the partition has a nozzle for admitting the air pressure to the one side of the diaphragm.