Internal combustion engine operating control system and method

US4542727A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Heinz Britsch · Bietigheim-Bissingen, DE
• Martin Klenk · Munich, DE
• Ernst Linder · Mühlacker, DE
• Winfried Moser · Ludwigsburg, DE

Key dates

• Filing date: Sep 20, 1982
• Grant date: Sep 24, 1985
• Expiry date: Sep 20, 2002

Classification

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

Abstract

To modify engine operation and reduce the tendency of the engine to knock or ping, a knocking signal is generated which is representative of knocking intensity and/or frequency of knocking occurrence, and compared with a permissible knocking signal. The result of the comparison is utilized to change an operating parameter of the engine, for example by injecting a fluid, e.g. water, into the engine, changing charge pressure, for example of a turbocharger or the like. The permissible engine knock signal can be modified in accordance with an engine operating parameter, for example at low temperature, or low speed, the permissible knocking limit can be raised since the damaging effect of knocking at low temperature or low speed is less than under different operating conditions.