System for controlling the fuel supplied to an automotive engine

US4771849A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Heinz Leiber · Oberriexingen, DE
• Wolfgang Korasiak
• Dieter Roller · Schenefeld, DE
• Alfred Sigl · Tokyo, JP
• Eberhard Schnaibel · Hemmingen, DE
• Franz Brugger · Winnenden, DE

Key dates

• Filing date: Feb 25, 1987
• Grant date: Sep 20, 1988
• Expiry date: Feb 25, 2007

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B1/04
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An automotive engine forming part of a motor vehicle is controlled to avoid slipping or spinning of a driven wheel by controlling the maximum rate of change of fuel which can be supplied to the engine, for example, by limiting the speed of deflection of a throttle flap (6) driven by a servo motor (7). The deflection speed, limited for example by a voltage divider (14) can be controlled as a function of operating parameters of the engine or the vehicle, for example, vehicle speed (V.sub.F), engine speed (n.sub.M), engine loading or a percentage of engine loading, actual wheel slip, actual angle or deflection position of the throttle flap, and the like. Further, non-linearities between deflection of an operator actuated pedal, such as a gas pedal (1) and actual deflection of the control flap (6) can be compensated for, for example, in a difference forming circuit (9) providing an output error signal for the servo motor (7) or by software, e.g. by recourse to non-linear characteristics stored in a table or graph. The duration of limiting can be determined by timing circuit connected to a terminal (p) for example, on the voltage divider (14). The system can be instrumented electrically…