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:
Jun. 22, 1982
Filed:
May. 06, 1980
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123339 ; 123336 ; 123340 ; 123344 ; 123362 ; 123399 ;
Abstract
An electronic type air/fuel ratio control system for use in gasoline engines comprises an accelerator, a detector of the manipulation angle of the accelerator, a shunt conduit by-passing a throttle valve, an air by-pass valve exposed in the shunt conduit for controlling flow rate of by-pass air, and a control circuit. The control circuit is responsive to the output of the accelerator manipulation angle detector and generates a control signal for the air by-pass valve, whereby the air/fuel ratio can be controlled with high accuracy when the flow rate of air is low.