Device for generating control signals with a primary control unit and an auxiliary control unit

US4437154A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hermann Eisele · Leinfelden, DE
• Heinz Moller · Stuttgart, DE
• Manfred Schmitt · Munich, DE

Key dates

• Filing date: Aug 19, 1981
• Grant date: Mar 13, 1984
• Expiry date: Aug 19, 2001

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/266
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device is proposed for generating control signals with a primary and an auxiliary control unit, having an error indication circuit layout and a subsequently disposed switchover device from the primary to the auxiliary control unit. The auxiliary control unit operates in parallel with the primary control unit and emits monitoring signals spaced apart in time from those of the primary control unit, which do not yet influence the consumer. If the device is put to use as an injection signal generator in internal combustion engines, then it is recommended that the auxiliary control unit emit its output signal either one cycle later, or 180.degree. of crankshaft angle later, than does the primary control unit. The occurrence of the individual signals can be detected and evaluated. Upon the appearance of an error, the former auxiliary control circuit can then be switched over to become the primry control circuit; in that event, then a reversal must then be effected in the times when the individual pulses occur.