Circuit arrangement for electronic control of an internal combustion engine

US5199394A · kind A · utility

Assignee

• Vogt Electronic AG · DE

Inventors

• Uwe Hartmann · Stuttgart, DE
• Udo Mai · Hauzenberg, DE

Key dates

• Filing date: Nov 15, 1991
• Grant date: Apr 6, 1993
• Expiry date: Nov 15, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention provides a circuit for electronic control of an internal combustion engines including injection valves that can be activated electrically as a function of regulated variables such as crankshaft position, engine speed, exhaust-gas composition and engine torque. The circuit includes an electronic control unit with means to activate the intake valves, exhaust valves, injection valves and ignition device as a function of ignition duration and ignition timing. The control unit also includes a start-up program with which ignition sequences of the engine cylinders, intake valves, injection valves and ignition device can be activated for any desired cylinder position of an engine-start-up process. The circuit further includes a program memory, an engine-standstill detection circuit, and an absolute-value angle transmitter to which the engine-standstill detection circuit is responsive. The absolute-value angle transmitter includes a coding disk that is integrally connected with the crankshaft of the engine, circuitry for generating signals corresponding to the crankshaft position during standstill and during rotational movement, and circuitry for generating electrical signals …