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:
Apr. 06, 1982
Filed:
Feb. 27, 1980
Applicant:
Inventors:
Richard G Woodhouse, Birmingham, GB;
Malcolm Williams, Birmingham, GB;
Assignee:
Lucas Industries Limited, Birmingham, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ; F02M / ; F02P / ;
U.S. Cl.
CPC ...
123436 ; 123419 ;
Abstract
An i.e. engine fuel control system includes a main fuel control which controls fuel flow to the engine in accordance with one or more engine operating parameters. The operation of the fuel control can be modified by a roughness sensing circuit which produces a roughness signal output dependent on the magnitude of fluctuations of engine speed. This output is applied to an integrator which provides a limited authority trim signal to the fuel control in accordance with the time integral of the error between the roughness signal and a speed-dependent reference signal generated by a speed-shaping circuit.