Turbocharged internal combustion engine with boost pressure and ignition timing control for preventing knocking combustion

US4463565A · kind A · utility

Assignee

• AB Volvo · SE

Inventors

• Jan E. Rydquist · Lindome, SE
• Lars Sandberg · Uppsala, SE
• Ralf Wallin · Lindome, SE

Key dates

• Filing date: Feb 16, 1982
• Grant date: Aug 7, 1984
• Expiry date: Feb 16, 2002

Classification

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

Abstract

A system for preventing knocking combustion in a turbocharged Otto engine includes a knock detector mounted on the engine block and coupled to a microprocessor which controls the engine charge pressure and ignition timing. Upon indication of a certain knocking intensity, the processor sends signals to a valve regulating the charge pressure to reduce this pressure as well as signals to the engine timing control system to retard the engine ignition timing.