Flow-passage controller for intake port

Abstract

Abstract PURPOSE:To obtain at all times proper swirling flow and a high charging efficiency irrespective of the loading state of an engine by branching the main branched passage branched from the inlet passage part in a helical-type intake port into two branched passages and connecting them to the terminal part and the starting part of the swirl part respectively. CONSTITUTION:A helical-type intake port 6 consists of the inlet passage part A having a slightly curved axis line of a flow passage and the swirl part B formed around an intake valve, and installed in a cylinder head 3. In this case, a main branched passage 13 is branched from the vicinity of the inlet opening of the inlet passage A, and further branched to the first and the second branched passages 14 and 15. The inlet opening 16 of the main branched passage 13 is formed on the side wall surface 9 in the vicinity of the inlet opening of the inlet passage part A, and the exit openings 17 and 19 of the first and the second branched passages 14 and 15 are respectively formed in the swirl terminating part C and the swrirl starting part D respectively. A flow-passage controlling valve 22 in a cantilevered thin lear form is arranged in the branched part 20 of the both branched parts 14 and 15, and said valve 22 controls switching according to the loaded state of an engine.

Inventors

• 👤 Kiyoshi Nakanishi
• 👤 清 中西
• 👤 Takeshi Okumura
• 👤 猛 奥村
• 👤 Tokuta Inoue
• 👤 井上　悳太

Bibliographic Details