Variable valve mechanism for an engine

US6681731B2 · kind B2 · utility

Assignee

• Visteon Global Technologies, Inc. · US

Inventors

• Lawrence A. Mianzo · Pittsburgh, US
• Brett Collins · Ypsilanti, US
• Zeljko Popovic · San Francisco, US
• Ibrahim Haskara · Chesterfield Township, US
• Harold Sean Hilbert · Canton, US

Key dates

• Filing date: Jan 31, 2002
• Grant date: Jan 27, 2004
• Expiry date: Jan 31, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2301/00
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The variable valve mechanism of a preferred embodiment of the invention includes a valve slidably mounted to move between a closed position and an open position, a cam rotatably mounted to push the valve from the closed position toward the open position, and an electromagnet adapted to selectively hold the valve in the open position. The variable valve mechanism acquires most of the benefits of a bi-directional electromagnetic arrangement (such as increased fuel economy, decreased start-up emissions, etc.), while avoiding most of the disadvantages (costs, NVH, etc.).