Engine position detection using manifold pressure

US5321979A · kind A · utility

Assignees

• General Motors LLC · US
• DELCO ELECTRONICS CORPORATION · US

Inventors

• David G. Mc Kendry · Bloomfield Hills, US
• Kenneth D. Leininger · Walker, US
• Mark Thomas · Columbus, US
• Matthew Hamilton · St. John's, CA

Key dates

• Filing date: Mar 15, 1993
• Grant date: Jun 21, 1994
• Expiry date: Mar 15, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L23/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The absolute angular position of an internal combustion engine is determined by monitoring engine intake manifold pressure at a strategic position in the manifold affected most significantly by the intake event of a predetermined cylinder. A significant or maximum depression in manifold pressure over each engine cycle then is indicative of the intake stroke of the predetermined cylinder.