Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Patent
1991-12-16
1993-04-06
Koczo, Michael
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
137107, F02B 3712
Patent
active
051992604
ABSTRACT:
A wastegate actuator control valve for a wastegate of a turbocharger of an internal combustion engine is disposed in the intake manifold pressure supply line to the wastegate actuator and has a spring-biassed piston preventing intake manifold pressure from being transmitted through said line until a predetermined intake manifold or boost pressure is reached. The valve housing also has a bleed orifice communicating to the atmosphere to relieve any residual pressure in the actuator when the valve is closed but which bleed orifice is closed upon the piston moving to the open position. Such residual pressure relief results in the full preload of the actuator spring being exerted to completely close the wastegate. Further, the piston is provided with a metering orifice through which the intake manifold pressure flows to the wastegate actuator. This delays the wastegate valve response time during acceleration, increasing available horsepower at intermediate engine speeds and improving transient exhaust gas emissions.
REFERENCES:
patent: 228532 (1880-06-01), Hoyt
patent: 1601943 (1926-10-01), Conrader
patent: 1933905 (1933-11-01), Hawks
patent: 2670751 (1954-03-01), Wilson
patent: 3270951 (1966-09-01), Reed
patent: 4561407 (1985-12-01), Jaussi et al.
Koczo Michael
Navistar International Transporation Corp.
Sullivan Dennis K.
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