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:
Sep. 21, 1982
Filed:
Jun. 30, 1980
Hideo Kiuchi, Aichi, JP;
Nobuyuki Kobayashi, Toyota, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
A fuel injection device comprising an injection unit having a back pressure chamber and a fuel chamber which are separated by a diaphragm. The fuel chamber has on its lower end a fuel nozzle. A needle, cooperating with the fuel nozzle, is connected to the diaphragm. A flow control valve is arranged in the fuel feed passage connecting the fuel chamber to the fuel feed pump. The amount of the fuel injected from the fuel nozzle is controlled by the flow control valve so as to be proportional to the amount of the air sucked in. One end of the back pressure chamber is connected, to the pressure reducing chamber of the pressure reducing valve via a restricted opening and, the other end is connected to the fuel tank via the fuel return passage. An electromagnetic valve is arranged in the fuel return passage. An oxygen concentration detector is arranged in the exhaust passage of an engine. The electromagnetic valve is controlled by the oxygen concentration detector for equalizing the air-fuel ratio of the mixture, fed into the cylinders of an engine, to the stoichiometric air-fuel ratio.