Two stroke cycle internal combustion engines

USRE37230E · kind E · reissue

Assignee

• Orbital Engine Company (Australia) Proprietary Limited · AU

Inventors

• Christopher K. Schlunke · Joondalup, AU
• Mark Lear · Tauranga, NZ

Key dates

• Filing date: Jan 15, 1997
• Grant date: Jun 19, 2001
• Expiry date: Jan 15, 2017

Classification

• Technology area (CPC —): General

Abstract

A two stroke cycle engine 10 with an exhaust gas treatment catalyst. Separate reducing and oxidizing catalyst portions 126 and 127 are provided to treat different portions of the exhaust gas exhausted during each exhaust period. The portion of the exhaust gas high in NOx, usually that first exhausted upon initial opening of the exhaust port, is directed to be treated by the reducing catalysts 126 and the remainder of the exhaust gas is directed to be treated by the oxidizing catalyst 127.