Method of turbocharger control

Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine

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F02B 3712

Patent

active

049613197

ABSTRACT:
The present invention is a method for controlling the position of pivotally mounted vanes movable between open and closed operative positions to control gas flow to a turbine. The method includes checking whether the engine throttle is open, checking whether the throttle is wide open if the throttle is open, and determining whether the vehicle is moving if the throttle is not wide open. The method also includes determining whether the engine temperature is above a predetermined temperature if the vehicle is not moving and determining whether the manifold absolute pressure is greater than the barometric pressure if the engine is not above the predetermined temperature. The method further includes determining whether the engine RPM is greater than a predetermined RPM value if the engine temperature is above the predetermined temperature, and opening the vanes to a maximum position if the manifold absolute pressure is not greater than the barometric pressure.

REFERENCES:
patent: 4179247 (1979-12-01), Osborn
patent: 4378960 (1983-04-01), Lenz
patent: 4403913 (1983-09-01), Fisker
patent: 4471616 (1984-09-01), Boudy
patent: 4490622 (1984-12-01), Osborn
patent: 4516401 (1985-05-01), Jackson
patent: 4535592 (1985-08-01), Zinsmeyer
patent: 4597264 (1986-07-01), Cipolla
patent: 4671068 (1987-06-01), Moody et al.
patent: 4794759 (1989-01-01), Lyon
SAE Paper No. 860107, Variable Geometry Turbocharging with Electronic Control, Moody, Feb. 1986.
SAE Paper No. 890457, A High Power, Wide Torque Range, Efficient Engine with a Newly Developed Variable Geometry Turbocharger, Inoue, 1989.

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