Turbo charging systems

Patent · Tue Mar 10 04:00:00 EST 1981

OSTI ID:6130257

Bergstedt, D; Johansson, A E

The invention relates to super-charged combustion engines in which a compressor is arranged in the engine inlet system and driven by a turbine in the engine exhaust system, a duct is provided for by-passing the turbine to the exhaust outlet, and a valve is provided to control exhaust gas flow through the by-pass duct and turbine. The invention provides exhaust gas pressure transmitting means connected to actuating means incorporated in the valve, said actuating means operating in dependence upon the pressure of the exhaust gas to control its flow through the turbine and the by-pass duct in order to limit the speed of the turbine and the compressor when a predetermined pressure is exceeded, whereby pressure in the engine inlet system decreases with increasing engine speed, at least within an upper rpm range of the engine. The invention realizes an engine in which a higher fuel economy and performance is achieved, compared with known super-charging arrangements, particularly in that the arrangement according to the invention can be controlled to produce a markedly higher torque within the normal operating range of the engine.

• Assignee: Saab-Scania Ab (Sweden)
• Patent Number(s): US 4254625
• OSTI ID: 6130257
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
BYPASSES
COMPRESSORS
CONTROL EQUIPMENT
DESIGN
DUCTS
ENGINES
EQUIPMENT
EXHAUST GASES
FLOW REGULATORS
FLUIDS
FUEL ECONOMY
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINERY
SUPERCHARGERS
TURBINES
TURBOMACHINERY
VALVES
WASTES