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:
Aug. 24, 1982
Filed:
Apr. 17, 1980
Haruyuki Obata, Susonoshi, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
A blow-by gas treating and controlling system in which blow-by gas accumulated in the crank chamber of an internal combustion engine is induced by means of the vacuum generated at a portion of the throttle barrel of the carburetor above the throttle valve, the level of vacuum established in that region being proportional to the flow rate of the intake mixture. The blow-by gas is then mixed with the fresh air-fuel mixture and burnt together with the latter. Generation of an excessively high vacuum in the crankcase, which may take place when the rate of generation of the blow-by gas is small, is avoided because of the presence of a bleed pipe which is connected between the blow-by gas treating pipe and the air cleaner of the engine and adapted to supply suplementary air to the blow-by gas through orifice. Also, an excessively high pressure generated in the crank chamber is relieved through this bleed pipe which acts in this case as a safety by-pass passage.