Internal combustion engine with two intake passages

Abstract

Abstract PURPOSE: To keep the fuel distribution and fuel atomization good in the low and medium speed range and prevent the full open output from falling in the high speed range, by providing a fuel injection valve only in a primary intake passage through which the mixture is always supplied. CONSTITUTION: The primary intake passage 11 is connected to a swirl port 5. The injection valve 12 is installed at the coupled part of the primary intake passage 11 with a cylinder head 1. The injection valve 12 is operated by a pulse sifgnal from a controller 13. In the low and medium speed operation of the engine, only a primary throttle valve 15 is opened and the mixture is supplied to a combustion chamber 4 through the swirl port 5. The quantity of fuel injected by the fuel injection valve 12 is determined correspondingly to the quantity of intake air passed through the primary throttle valve 15. The mixture of perdetermined air fuel ratio is introduced into the combustion chamber 4 while the mixture swirls. The combustion is stabilized by the swirl. The exhaust gas is cleaned up by a thin mixture or by a large quantity of recycled exhaust gas. COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Yasuhiko Nakagawa
• 👤 Yukihiro Eto
• 👤 Akiji Nakai
• 👤 Ryoji Nakajima

Bibliographic Details