Engine assembly for a vehicle having a hydrocarbon trap

US12071887B2 · kind B2 · utility

Assignee

• BRP-ROTAX GMBH & CO. KG · AT

Inventors

• Ralf Rokita · Fraham, AT
• Matthias Zarhuber · Bergerndorf, AT
• Christian Raffelsberger · Dorf, AT
• Heinz Kusel · Schwanenstadt, AT
• Nigel Foxhall · Semriach, AT
• Markus Doppelbauer · Wels, AT
• Thomas ZORN · Stadl-Paura, AT
• Christian Schwab · Sternenfels, DE

Key dates

• Filing date: Dec 17, 2021
• Grant date: Aug 27, 2024
• Expiry date: Dec 17, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

An engine assembly for a vehicle includes an internal combustion engine and an exhaust system. The exhaust system includes a catalytic converter, a main muffler, a hydrocarbon trap, a pre-muffler disposed upstream from the main muffler and the hydrocarbon trap, and an exhaust path valve. The exhaust path valve is movable between first and second exhaust path positions. The exhaust path valve obstructs a second exhaust path in the first exhaust path position such that exhaust gas flows from an exhaust port of an engine cylinder to the catalytic converter to the main muffler and to the atmosphere. The exhaust path valve obstructs a first exhaust path in the second exhaust path position such that exhaust gas flows from the exhaust port of the engine cylinder to the catalytic converter to the hydrocarbon trap and to the atmosphere.