Engine control system for minimizing turbocharger lag including altitude and intake manifold air temperature compensation

US6234149A · kind A · utility

Assignee

• CUMMINS ENGINE COMPANY · US

Inventors

• John R. Mills · Williamsburg, US
• Ward R. Edwards · Columbus, US
• John L. Hoehne · Columbus, US
• David A. Bolis · Nashville, US
• Gary C. Salemme · Columbus, US
• Lawrence Becker · Rugby, GB

Key dates

• Filing date: Feb 25, 1999
• Grant date: May 22, 2001
• Expiry date: Feb 25, 2019

Classification

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

Abstract

An engine control system for optimizing a tradeoff between turbocharger lag and production of exhaust emissions including altitude and intake manifold air temperature compensation includes a turbocharger boost sensor, an engine speed sensor, an ambient pressure sensor and an intake manifold air temperature sensor, each providing appropriate sensor signals to a control computer. The control computer is operable to limit fueling signals supplied to the engine fuel system based on turbocharger boost, engine speed, ambient pressure and intake manifold air temperature to thereby optimize a tradeoff between turbocharger lag and production of black smoke and other exhaust emissions while compensating for changes in altitude and intake manifold air temperature. In one preferred embodiment, the control computer includes a fueling table stored therein which maps boost pressure and engine speed values to appropriate fueling values, an altitude correction table stored therein which maps boost pressure and ambient pressure to appropriate fueling correction values and an intake air temperature correction table store therein which maps intake manifold air temperature values to appropriate intake …