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:
Sep. 15, 1987
Filed:
Oct. 21, 1985
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi, JP;
Abstract
An inlet port for an internal combustion engine having an inlet hole opened on an end face of a cylinder chamber at an off-center position, the inlet hole being provided with an inlet valve and connected to an inlet passage. The inlet passage comprises a swirl generating section which is connected to the inlet hole and surrounds the inlet valve at the end section of the inlet passage and an introducing section which is the remaining section of the inlet passage excluding the end section, the width between the peripheral surface of the valve stem of the inlet valve and the wall surface of said swirl generating section is made larger at the outside part on the wall side of the cylinder chamber than the inside part on the center side of the cylinder chamber, the introducing section is connected to the outside part of the swirl generating section, the height from the opening face of the inlet hole to the ceiling of the swirl generating section is made to decrease from the wider outside part to the narrower inside part around the valve stem, and its average rate of reduction is set between 0% and 0.18% of the inlet hole diameter per one degree around the valve stem.