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. 27, 1977
Filed:
Sep. 17, 1976
Jack C Priegel, El Paso, TX (US);
Autotronic Controls Corporation, El Paso, TX (US);
Abstract
An electronic fuel injection system for maintaining absolute control over the air to fuel ratio flowing to the combustion chambers of an internal combustion engine. The system includes means for measuring the air flow rate to the engine. The flow rate measurement is converted into a proportional electrical signal which flows to a signal summing unit. The fuel flow rate from a fuel pump is controlled by a signal recieved from the signal summing unit, and provides a controlled fuel flow to the engine which is proportional to the air flow. Means associated with the fuel pump measures the exact flow rate therefrom and converts the measurement into another proportional electrical signal which is fed back to the summing unit to thereby form a closed loop circuit. The summing unit compares the first signal with the second signal and changes the fuel flow rate the required amount to maintain the ratio thereof at a predetermined value. There is optionally included within the system a warm-up enrichment, acceleration enrichment, and temperature and barometric pressure conversion means, all of which are connected back to the summing unit so as to provide extremely close control over all parameters affecting the air to fuel ratio.