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:
Mar. 22, 1994
Filed:
Feb. 26, 1993
Hiromitsu Ando, Okazaki, JP;
Osamu Hirako, Okazaki, JP;
Shogo Omori, Okazaki, JP;
Jun Takemura, Toyota, JP;
Taizo Kitada, Okazaki, JP;
Katsuo Akishino, Okazaki, JP;
Yasuki Tamura, Okazaki, JP;
Michihiro Hata, Okazaki, JP;
Kinichi Iwachido, Nagoya, JP;
Masayuki Motomochi, Toyota, JP;
Syunsuke Matsuo, Kyoto, JP;
Nobuaki Murakami, Kyoto, JP;
Keizo Furukawa, Kyoto, JP;
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An internal combustion engine according to this invention is provided with intake ports and an injector. The intake ports are designed to form stratified tumble flows of different fuel concentrations in a combustion chamber. A spark plug is arranged in the combustion chamber to ignite one of the tumble flows, which one tumble flow is rich in fuel. Each intake port is provided with a longitudinal partition which divides an interior of the intake port into two passages. These longitudinal partitions are formed in such a way that, of the air-fuel tumble flows formed around the spark plug, the tumble flow closest to the spark plug is formed of a richer air-fuel mixture. Each longitudinal partition is arranged only on a side upstream of a valve stem of an intake valve in the corresponding intake port, so that a sufficient amount of intake air can be obtained while extremely minimizing a reduction in the actual cross-sectional flow area.