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:
Dec. 27, 1983
Filed:
Apr. 01, 1981
Hiroshi Sami, Numazu, JP;
Osamu Ito, Toyota, JP;
Shizuo Kawai, Kariya, JP;
Nobuhito Hobo, Inuyama, JP;
Teruo Nishio, Anjo, JP;
Nippondenso Co., Ltd., Kariya, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
An electric control apparatus for a fuel injection pump comprises a fuel flow sensor for detecting the net quantity of fuel supplied to the fuel injection pump, operating condition sensors for detecting operating condition parameters of an engine, a servo device for driving a fuel injection quantity controlling element of the fuel injection pump which controls the fuel injection quantity of the fuel injection pump, and an electric control circuit for receiving detection signals from the fuel flow sensor and the operating condition sensors, computing the actual fuel injection quantity and the desired fuel injection quantity, and determining an error between the computed actual fuel injection quantity and desired fuel injection quantity to drive the fuel injection quantity controlling element of the fuel injection pump through the servo device in accordance with an error representing signal, thereby controlling the actual fuel injection quantity at the desired fuel injection quantity. By ensuring high detection accuracy of the fuel flow sensor, it is possible to accomplish high precision control of the fuel injection quantity without utilizing the position of a moving part of the fuel injection quantity controlling element of the fuel injection pump.