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:
May. 10, 1977
Filed:
May. 19, 1975
Bernard Laprade, 64 260 Arudy, FR;
Xavier Laprada, 64 260 Arudy, FR;
Pierre Gele, 65 000 Tarbes, FR;
Other;
Abstract
A method and device for regulating the composition of a fuel air mixture supplied to an internal combustion engine by means of a valve in a secondary air inlet opening into the intake pipe of the internal combustion engine. A detector measures the composition of the exhaust gas and supplies a signal proportional to the oxygen or carbon monoxide content of the gas, this signal is compared with a stabilized voltage, the difference thus obtained is compared with a signal consisting of triangular pulses of a fixed amplitude and the signal thus obtained is used to control the valve after amplification, the duration of the signal defining the time of opening of the valve.