Engine throttle servoactuator control system

US5199401A · kind A · utility

Assignee

• Eaton Corporation · US

Inventors

• Walter K. O'Neil · Southfield, US
• Donald Haefner · Troy, US
• Wayne E. Klindt · Sterling Heights, US
• Mark L. Leonard · Canton, US
• Daniel R. Parks · Big Lake, US
• Don K. St. John · Livonia, US

Key dates

• Filing date: Oct 21, 1991
• Grant date: Apr 6, 1993
• Expiry date: Oct 21, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2011/103
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A control system for an engine throttle valve actuator uses an actuator position feedback loop with a compensation factor which applies a reverse voltage having an amplitude based on actuator momentum to a DC motor to effectuate an electrical braking action to achieve high speed response with positional accuracy. A separate position limiting feedback loop is used to prevent excessive actuator excursions. The engine throttle valve is controlled to a selected position by using a throttle valve position feedback loop and a compensation factor to provide a feedback signal to a summing junction.