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. 18, 1989
Filed:
Dec. 15, 1987
Koichi Suda, Aichi, JP;
Fumio Sugi, Handa, JP;
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Abstract
A carburetor having a suction passage including therein a large venturi section and a throttle valve and connected at the upstream end thereof to the discharge port of a supercharger and at the downstream end thereof to the intake manifold of an internal combustion engine. A recess is formed either in the outer circumference of the shaft of the throttle valve or in the inside wall of a through hole formed in the body of a carburetor for pivotally supporting the shaft of the throttle valve, whereby a pressure chamber is formed between the shaft of the throttle valve and the through hole. The pressure chamber communicates with part of the suction passage upstream of the venturi tubes by a first air passage, and a second air passage opening into the through hole at a position between the suction passage and the pressure chamber communicates with the suction passage at a position downstream of the throttle valve. Pressure chambers which surround the throttle shaft are located to receive an air-fuel mixture when the pressure downstream of the venturi becomes greater than that upstream of the venturi and to feed the retained mixture into the carburetor when the pressure downstream of the venturi is lower than that upstream of the venturi.