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. 31, 1994
Filed:
Apr. 05, 1993
Yasuhiko Hattori, Oobu, JP;
Kenji Eitoku, Oobu, JP;
Aisan Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
An intake control device for an internal combustion engine having a body member 1 and a throttle valve 5 disposed within an air passage 4 . The external circular edge of the throttle valve 5 is divided, with a throttle shaft 6 into a first edge portion 5a which moves toward the upstream side of the air passage 4 and a second edge portion 5b which moves toward the downstream side of the air passage 4. On an inner wall 7 of the air passage 4 of the body member 1 are formed an upstream-side spherical wall surface 8 in a position facing the first edge portion 5a and a downstream-side spherical wall surface 9 in a position facing the second edge portion 5b. A first clearance 13 formed between the first edge portion 5a and the upstream-side spherical wall surface 8 is smaller than a second clearance 14 formed between the second edge portion 5b and the downstream-side spherical wall surface; the second edge portion 5b of the throttle valve 5 may not come into contact with the downstream-side spherical wall surface 9 even when a high intake manifold vacuum is built on the downstream side of the throttle valve 5 when the throttle valve 5 is in a position for closing the air passage 4.