Method and apparatus for fuel mixture enrichment during acceleration

US4223643A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Otto Glockler · Renningen, DE
• Harro Herth · Schwieberdingen, DE
• Thomas Wilfert · Ludwigsburg, DE
• Bernd Kraus · Gerlingen, DE

Key dates

• Filing date: Feb 16, 1978
• Grant date: Sep 23, 1980
• Expiry date: Feb 16, 1998

Classification

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

Abstract

The fuel mixture preparation system of an internal combustion engine, especially a continuous fuel injection system, is engaged during intended engine accelerations by a pressure sensor in the induction manifold which responds to increasing manifold pressure to close a switch. The switch closure affects a pressure control valve that changes the control pressure in the fuel injection system and thereby causes temporary fuel enrichment until the differential pressure in the pressure sensor has returned to equilibrium. The signal from the pressure sensor may be extended arbitrarily by interposition of an electronic timing circuit which is constructed as an integrating circuit so that its output signal, when processed by a comparator, will produce a proportionally extended actuation signal for the control valve.