Torch ignition type internal combustion engine

US4128081A · kind A · utility

Assignee

• NIPPON SOKEN, INC. · JP

Inventors

• Masaaki Noguchi · Nagoya, JP
• Masaharu Sumiyoshi
• Yukiyasu Tanaka
• Taro Tanaka

Key dates

• Filing date: Dec 28, 1976
• Grant date: Dec 5, 1978
• Expiry date: Dec 28, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A torch ignition type internal combustion engine has a main combustion chamber and a trap chamber having torch apertures through which both chambers are communicated with each other. The apertures are positioned such that, when the main chamber is supplied with a charge of an air-fuel mixture from an intake port on an intake stroke, a part of the mixture charge is introduced through one of the apertures into the trap chamber and the residual gases remaining therein are simultaneously discharged from the trap chamber into the main chamber through the other aperture. The trap chamber has a substantially smoothly continuous inner surface to which the one aperture is tangential so that the introduction of air-fuel mixture therethrough into the trap chamber produces therein a vortex flow which facilitates scavenging of the trap chamber. A part of the mixture charge to the main chamber is also introduced into the trap chamber through both apertures on a succeeding compression stroke and also causes a vortex in the trap chamber, which assures uniform mixing of the fresh air-fuel mixture therein and any residual gases, if any, therein to thereby facilitate improved spark-ignition of the mi…